eRAN
UL CoMP Feature Parameter Description Issue
03
Date
2015-08-31
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2015. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
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Website:
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Email:
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eRAN UL CoMP Feature Parameter Description
Contents
Contents 1 About This Document.................................................................................................................. 1 1.1 Scope.............................................................................................................................................................................. 1 1.2 Intended Audience.......................................................................................................................................................... 1 1.3 Change History............................................................................................................................................................... 2 1.4 Differences Between eNodeB Types.............................................................................................................................. 8
2 Overview......................................................................................................................................... 9 2.1 Background.....................................................................................................................................................................9 2.2 Introduction.................................................................................................................................................................... 9 2.3 Related Concepts.......................................................................................................................................................... 11 2.4 Application Scenarios...................................................................................................................................................13 2.4.1 LOFD-001066 Intra-eNodeB UL CoMP...................................................................................................................14 2.4.2 LOFD-070222 Intra-eNodeB UL CoMP Phase II.....................................................................................................14 2.4.3 LOFD-070223 UL CoMP based on Coordinated BBU.............................................................................................15 2.4.4 LOFD-081219 UL CoMP Based on Relaxed Backhaul............................................................................................16 2.4.5 UL CoMP in SFN Scenarios..................................................................................................................................... 17 2.5 Benefits......................................................................................................................................................................... 18 2.5.1 Sources of Gains........................................................................................................................................................ 19 2.5.2 Areas Benefiting from UL CoMP............................................................................................................................. 21 2.5.3 Level of Gains........................................................................................................................................................... 23 2.6 Evolution of UL CoMP................................................................................................................................................ 24
3 Technical Description.................................................................................................................28 3.1 Basic Process................................................................................................................................................................ 29 3.2 Selection of UL CoMP UEs and Coordinated Cells.....................................................................................................30 3.3 Joint Reception by Multiple Cells' Antennas............................................................................................................... 34
4 Related Features...........................................................................................................................35 4.1 Relationships Between UL CoMP Features................................................................................................................. 35 4.2 Features Related to LOFD-001066 Intra-eNodeB UL CoMP......................................................................................36 4.3 Features Related to LOFD-070222 Intra-eNodeB UL CoMP Phase II........................................................................38 4.4 Features Related to LOFD-070223 UL CoMP based on Coordinated BBU................................................................39 4.5 Features Related to LOFD-081219 UL CoMP Based on Relaxed Backhaul...............................................................40
5 Network Impact........................................................................................................................... 42 5.1 LOFD-001066 Intra-eNodeB UL CoMP......................................................................................................................42 Issue 03 (2015-08-31)
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5.2 LOFD-070222 Intra-eNodeB UL CoMP Phase II........................................................................................................42 5.3 LOFD-070223 UL CoMP based on Coordinated BBU................................................................................................43 5.4 LOFD-081219 UL CoMP Based on Relaxed Backhaul...............................................................................................43
6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP................................ 44 6.1 When to Use LOFD-001066 Intra-eNodeB UL CoMP................................................................................................44 6.2 Required Information................................................................................................................................................... 44 6.3 Planning........................................................................................................................................................................ 45 6.4 Deployment.................................................................................................................................................................. 45 6.4.1 Requirements............................................................................................................................................................. 45 6.4.2 Data Preparation........................................................................................................................................................ 48 6.4.3 Precautions.................................................................................................................................................................52 6.4.4 Hardware Adjustment................................................................................................................................................52 6.4.5 Activation.................................................................................................................................................................. 52 6.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs..................................................52 6.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs............................................................... 52 6.4.5.3 Using the CME to Perform Single Configuration.................................................................................................. 53 6.4.5.4 Using MML Commands......................................................................................................................................... 54 6.4.6 Activation Observation..............................................................................................................................................57 6.4.6.1 Using MML Commands......................................................................................................................................... 58 6.4.6.2 Using Signaling...................................................................................................................................................... 58 6.4.6.3 Querying the Number of UL CoMP UEs in a Cell on the U2000 Client............................................................... 60 6.4.6.4 Querying the UL CoMP Status of UEs on the U2000 Client................................................................................. 63 6.4.6.5 Using Counters....................................................................................................................................................... 66 6.4.7 Reconfiguration......................................................................................................................................................... 68 6.4.8 Deactivation...............................................................................................................................................................69 6.4.8.1 Using the CME to Perform Batch Configuration................................................................................................... 69 6.4.8.2 Using the CME to Perform Single Configuration.................................................................................................. 69 6.4.8.3 Using MML Commands......................................................................................................................................... 69 6.5 Performance Monitoring...............................................................................................................................................70 6.6 Parameter Optimization................................................................................................................................................ 72 6.7 Troubleshooting............................................................................................................................................................ 74
7 Engineering Guidelines for LOFD-070222 Intra-eNodeB UL CoMP Phase II................ 76 7.1 When to Use LOFD-070222 Intra-eNodeB UL CoMP Phase II..................................................................................76 7.2 Required Information................................................................................................................................................... 76 7.3 Planning........................................................................................................................................................................ 77 7.4 Deployment.................................................................................................................................................................. 77 7.4.1 Requirements............................................................................................................................................................. 77 7.4.2 Data Preparation........................................................................................................................................................ 79 7.4.3 Precautions.................................................................................................................................................................83 7.4.4 Hardware Adjustment................................................................................................................................................83 7.4.5 Activation.................................................................................................................................................................. 83 7.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs..................................................83 Issue 03 (2015-08-31)
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7.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs............................................................... 84 7.4.5.3 Using the CME to Perform Single Configuration.................................................................................................. 85 7.4.5.4 Using MML Commands......................................................................................................................................... 86 7.4.6 Activation Observation..............................................................................................................................................89 7.4.6.1 Using MML Commands......................................................................................................................................... 89 7.4.6.2 Using Signaling...................................................................................................................................................... 89 7.4.6.3 Using Counters....................................................................................................................................................... 91 7.4.7 Reconfiguration......................................................................................................................................................... 91 7.4.8 Deactivation...............................................................................................................................................................91 7.4.8.1 Using the CME to Perform Batch Configuration................................................................................................... 91 7.4.8.2 Using the CME to Perform Single Configuration.................................................................................................. 91 7.4.8.3 Using MML Commands......................................................................................................................................... 92 7.5 Performance Monitoring...............................................................................................................................................93 7.6 Parameter Optimization................................................................................................................................................ 93 7.7 Troubleshooting............................................................................................................................................................ 94
8 Engineering Guidelines for LOFD-070223 UL CoMP based on Coordinated BBU....... 96 8.1 When to Use LOFD-070223 UL CoMP based on Coordinated BBU..........................................................................96 8.2 Required Information................................................................................................................................................... 96 8.3 Planning........................................................................................................................................................................ 97 8.4 Deployment.................................................................................................................................................................. 97 8.4.1 Requirements............................................................................................................................................................. 97 8.4.2 Data Preparation...................................................................................................................................................... 100 8.4.3 Precautions...............................................................................................................................................................103 8.4.4 Hardware Adjustment..............................................................................................................................................104 8.4.5 Activation................................................................................................................................................................ 104 8.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs................................................104 8.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs............................................................. 104 8.4.5.3 Using the CME to Perform Single Configuration................................................................................................ 105 8.4.5.4 Using MML Commands....................................................................................................................................... 106 8.4.6 Activation Observation............................................................................................................................................ 110 8.4.6.1 Using MML Commands....................................................................................................................................... 110 8.4.6.2 Using Signaling.....................................................................................................................................................110 8.4.6.3 Using Counters..................................................................................................................................................... 112 8.4.7 Reconfiguration....................................................................................................................................................... 112 8.4.8 Deactivation............................................................................................................................................................. 112 8.4.8.1 Using the CME to Perform Batch Configuration................................................................................................. 112 8.4.8.2 Using the CME to Perform Single Configuration................................................................................................ 113 8.4.8.3 Using MML Commands....................................................................................................................................... 113 8.5 Performance Monitoring.............................................................................................................................................114 8.6 Parameter Optimization.............................................................................................................................................. 114 8.7 Troubleshooting.......................................................................................................................................................... 115
9 Engineering Guidelines for LOFD-081219 UL CoMP Based on Relaxed Backhaul.....117 Issue 03 (2015-08-31)
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9.1 When to Use LOFD-081219 UL CoMP Based on Relaxed Backhaul....................................................................... 117 9.2 Required Information..................................................................................................................................................117 9.3 Planning...................................................................................................................................................................... 118 9.4 Deployment.................................................................................................................................................................118 9.4.1 Requirements........................................................................................................................................................... 118 9.4.2 Data Preparation...................................................................................................................................................... 120 9.4.3 Precautions...............................................................................................................................................................123 9.4.4 Hardware Adjustment..............................................................................................................................................124 9.4.5 Activation................................................................................................................................................................ 124 9.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs................................................124 9.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs............................................................. 124 9.4.5.3 Using the CME to Perform Single Configuration................................................................................................ 125 9.4.5.4 Using the CME to Perform Feature Configuration.............................................................................................. 126 9.4.5.5 Using MML Commands....................................................................................................................................... 127 9.4.6 Activation Observation............................................................................................................................................128 9.4.6.1 Using MML Commands....................................................................................................................................... 128 9.4.6.2 Using Counters..................................................................................................................................................... 129 9.4.7 Reconfiguration....................................................................................................................................................... 129 9.4.8 Deactivation.............................................................................................................................................................129 9.4.8.1 Using the CME to Perform Batch Configuration................................................................................................. 129 9.4.8.2 Using the CME to Perform Single Configuration................................................................................................ 129 9.4.8.3 Using MML Commands....................................................................................................................................... 129 9.5 Performance Monitoring.............................................................................................................................................130 9.6 Parameter Optimization.............................................................................................................................................. 131 9.7 Troubleshooting.......................................................................................................................................................... 131
10 Parameters................................................................................................................................. 133 11 Counters.................................................................................................................................... 157 12 Glossary..................................................................................................................................... 162 13 Reference Documents............................................................................................................. 163
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eRAN UL CoMP Feature Parameter Description
1 About This Document
1
About This Document
1.1 Scope This document describes uplink coordinated multipoint reception (UL CoMP), including its technical principles, related features, network impact, and engineering guidelines. This document covers the following features: l
LOFD-001066 Intra-eNodeB UL CoMP
l
LOFD-070222 Intra-eNodeB UL CoMP Phase II
l
LOFD-070223 UL CoMP Based on Coordinated BBU
l
LOFD-081219 UL CoMP Based on Relaxed Backhaul
This document applies to the following eNodeBs. eNodeB Type
Model
Macro
3900 series eNodeB
LampSite
DBS3900 LampSite
Any managed objects (MOs), parameters, alarms, or counters described herein correspond to the software release delivered with this document. Any future updates will be described in the product documentation delivered with future software releases. This document applies only to LTE FDD. Any "LTE" in this document refers to LTE FDD, and "eNodeB" refers to LTE FDD eNodeB.
1.2 Intended Audience This document is intended for personnel who: l
Need to understand the features described herein
l
Work with Huawei products
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eRAN UL CoMP Feature Parameter Description
1 About This Document
1.3 Change History This section provides information about the changes in different document versions. There are two types of changes: l
Feature change Changes in features and parameters of a specified version as well as the affected entities
l
Editorial change Changes in wording or addition of information and any related parameters affected by editorial changes. Editorial change does not specify the affected entities.
eRAN8.1 03 (2015-08-31) This issue includes the following changes. Change Type
Change Description
Parameter Change
Affected Entity
Feature change
None
None
Macro eNodeBs
Editorial change
Deleted 3.3 "Event A3 Measurement Reporting", and added "RSRP Measurement" to 3.2 Selection of UL CoMP UEs and Coordinated Cells.
None
None
eRAN8.1 02 (2015-04-30) This issue includes the following changes.
Issue 03 (2015-08-31)
Change Type
Change Description
Parameter Change
Affected Entity
Feature change
Estimated the level of gains provided by UL CoMP. For details, see 2.5.3 Level of Gains.
None
Macro eNodeBs
Added the impact on CAMC. For details, see 4.2 Features Related to LOFD-001066 Intra-eNodeB UL CoMP.
None
Macro eNodeBs
Modified the impact on CA features. For details, see 4.2 Features Related to LOFD-001066 Intra-eNodeB UL CoMP, 4.3 Features Related to LOFD-070222 Intra-eNodeB UL CoMP Phase II, and 4.4 Features Related to LOFD-070223 UL CoMP based on Coordinated BBU.
None
Macro eNodeBs
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eRAN UL CoMP Feature Parameter Description
1 About This Document
Change Type
Change Description
Parameter Change
Affected Entity
Editorial change
Revised descriptions in this document.
None
None
eRAN8.1 01 (2015-03-23) This issue includes the following changes. Change Type
Change Description
Parameter Change
Affected Entity
Feature change
To enable the following features to support macro-micro UL CoMP:
None
Macro eNodeBs
None
None
l LOFD-001066 Intra-eNodeB UL CoMP l LOFD-070222 Intra-eNodeB UL CoMP Phase II l LOFD-070223 UL CoMP Based on Coordinated BBU Optimized the following operations: l Data preparation l Batch configuration for newly deployed eNodeBs using the CME l Activation using MML commands For details, see engineering guidelines. Editorial change
Revised descriptions in this document.
eRAN8.1 Draft A (2015-01-15) Compared with Issue 04 (2014-12-30) of eRAN7.0, Draft A (2015-01-15) of eRAN8.1 includes the following changes. Change Type
Change Description
Parameter Change
Affected Entity
Feature change
Added LampSite eNodeBs' support for LOFD-001066 IntraeNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II.
None
Macro and LampSite eNodeBs
For details, see 1.4 Differences Between eNodeB Types. Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
Change Type
1 About This Document
Change Description
Parameter Change
Affected Entity
Added the feature LOFD-081219 UL CoMP Based on Relaxed Backhaul.
l Added the UlJROverRelaxedB HSw option to the ENodeBAlgoSwitch. OverBBUsSwitch parameter.
Macro eNodeBs
For details, see the following chapters: l 2 Overview l 4 Related Features l 5 Network Impact l 9 Engineering Guidelines for LOFD-081219 UL CoMP Based on Relaxed Backhaul Added the support for LOFD-070223 UL CoMP Based on Coordinated BBU in distributed and centralized +distributed Cloud BB modes.
l Added the CellUlCompAlgo.Ul CompA3OffsetForRe laxedBH parameter.
None
Macro eNodeBs
Added the UlJointReception3CellS witch option to the CellAlgoSwitch.Uplink CompSwitch parameter.
Macro and LampSite eNodeBs
None
Macro eNodeBs
For details, see the following sections: l 2.4.3 LOFD-070223 UL CoMP based on Coordinated BBU l 5.3 LOFD-070223 UL CoMP based on Coordinated BBU Added the support for intra-BBP 3-cell UL CoMP in LOFD-001066 Intra-eNodeB UL CoMP. For details, see the following sections: l 2.4.1 LOFD-001066 IntraeNodeB UL CoMP l 2.6 Evolution of UL CoMP l 6.4.2 Data Preparation Added an eX2 QoS handling mechanism to LOFD-081219 UL CoMP Based on Relaxed Backhaul. For details, see 4.5 Features Related to LOFD-081219 UL CoMP Based on Relaxed Backhaul.
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eRAN UL CoMP Feature Parameter Description
Change Type
1 About This Document
Change Description
Parameter Change
Affected Entity
Added the UL CoMP capability of the LBBPd3, which supports six 2T4R cells.
None
Macro and LampSite eNodeBs
Added the following options to the CellAlgoSwitch.Uplink CompSwitch parameter:
Macro eNodeBs
For details, see the following sections: l 2.6 Evolution of UL CoMP l "Requirements" in "Deployment" in engineering guidelines for each feature Enabled LOFD-001066 IntraeNodeB UL CoMP, LOFD-070222 Intra-eNodeB UL CoMP Phase II, and LOFD-070223 UL CoMP Based on Coordinated BBU to support macro-micro UL CoMP. For details, see the following sections: l 2.2 Introduction
l UlHetnetJointReceptionSwitch l UlHetnetCompManua lNcellCfgSw l UlHetnetCompOnUl RsrpSw
l 2.4 Application Scenarios l 3.2 Selection of UL CoMP UEs and Coordinated Cells l "Data Preparation" and "Activation" in engineering guidelines for each feature Added the mutually exclusive relationships between the UL CoMP features and the following SFN features: LOFD-081208 Inter-eNodeB SFN Based on Coordinated BBU and LOFD-081209 Inter-eNodeB adaptive SFN/SDMA Based on Coordinated BBU.
None
Macro and LampSite eNodeBs
For details, see 4 Related Features.
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eRAN UL CoMP Feature Parameter Description
Change Type
1 About This Document
Change Description
Parameter Change
Affected Entity
Added the support for 1R UL CoMP and 1R+2R UL CoMP in LOFD-001066 Intra-eNodeB UL CoMP, LOFD-070222 IntraeNodeB UL CoMP Phase II, and LOFD-070223 UL CoMP Based on Coordinated BBU.
Added the CellAlgoSwitch.UlJRA ntNumCombSw parameter.
Macro and LampSite eNodeBs
For details, see the following sections: l 2.6 Evolution of UL CoMP l "Requirements" in "Deployment" in engineering guidelines for each feature
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eRAN UL CoMP Feature Parameter Description
Change Type
1 About This Document
Change Description
Parameter Change
Affected Entity
Added the collaboration between the UL CoMP features and the SFN features LOFD-003029 SFN and LOFD-070205 Adaptive SFN/ SDMA, and added restrictions on the collaboration.
None
Macro and LampSite eNodeBs
None
None
Added the impact of these SFN features on LOFD-001066 IntraeNodeB UL CoMP, LOFD-070222 Intra-eNodeB UL CoMP Phase II, and LOFD-070223 UL CoMP Based on Coordinated BBU. Added the mutually exclusive relationships between these SFN features and LOFD-081219 UL CoMP Based on Relaxed Backhaul. For details, see the following sections: l 2.4.5 UL CoMP in SFN Scenarios l 3.2 Selection of UL CoMP UEs and Coordinated Cells l "Impacted Features" of LOFD-001066 Intra-eNodeB UL CoMP, LOFD-070222 Intra-eNodeB UL CoMP Phase II, and LOFD-070223 UL CoMP Based on Coordinated BBU as well as "Mutually Exclusive Features" of LOFD-081219 UL CoMP Based on Relaxed Backhaul in 4 Related Features l "Deployment" and "Parameter Optimization" in engineering guidelines for LOFD-001066 Intra-eNodeB UL CoMP, LOFD-070222 Intra-eNodeB UL CoMP Phase II, and LOFD-070223 UL CoMP Based on Coordinated BBU Editorial change
Issue 03 (2015-08-31)
Revised descriptions in this document.
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eRAN UL CoMP Feature Parameter Description
1 About This Document
1.4 Differences Between eNodeB Types Feature Support by Macro, Micro, and LampSite eNodeBs Feature ID
Feature Name
Supported by Macro eNodeBs
Supported by Micro eNodeBs
Supported by LampSite eNodeBs
LOFD-001066
Intra-eNodeB UL CoMP
Yes
No
Yes
LOFD-070222
Intra-eNodeB UL CoMP Phase II
Yes
No
Yes
LOFD-070223
UL CoMP based on Coordinated BBU
Yes
No
No
LOFD-081219
UL CoMP Based on Relaxed Backhaul
Yes
No
No
Function Implementation in Macro, Micro, and LampSite eNodeBs l
This feature is not supported by micro eNodeBs.
l
The features described in this document are implemented in the same way on macro and LampSite eNodeBs.
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eRAN UL CoMP Feature Parameter Description
2 Overview
2
Overview
2.1 Background Intra-cell interference in Long Term Evolution (LTE) is effectively eliminated by orthogonal frequency division multiplexing (OFDM) and multiple-input multiple-output (MIMO). The two technologies use low-rate orthogonal subcarriers to transmit high-rate data flows. However, inter-cell interference cannot be effectively mitigated by these technologies. When intra-frequency cells are deployed to achieve higher spectral efficiency, cell edge users (CEUs) experience interference from neighboring cells and their uplink throughput is significantly reduced. To mitigate inter-cell interference, uplink coordinated multipoint reception (UL CoMP) has been introduced and allowed to be implemented under proprietary schemes since 3GPP Release 8. By sharing channel status information and user data between neighboring cells and converting interference into useful information, UL CoMP mitigates interference between these cells, thereby enhancing cell coverage, improving cell performance, and increasing uplink CEU throughput.
2.2 Introduction UL CoMP is a multipoint reception technology. It coordinates the antennas of multiple cells to receive and combine signals from a piece of user equipment (UE). UL CoMP provides signal combining gains, interference mitigation gains, or both for a single UE. UL CoMP is similar to joint reception by the antennas of a single cell, with the following differences: l
UL CoMP reuses existing antennas, without adding antennas to cells.
l
UL CoMP provides lower gains, as the signal power received in each cell varies.
UL CoMP Classification The following table describes UL CoMP classification by application scenario, coordination scope, and transport bandwidth overhead. In this table, BBP stands for baseband processing unit, and BBU stands for baseband unit. Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
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Table 2-1 UL CoMP classification Category
Type
Feature
Macro-macro UL CoMP
Intra-BBP UL CoMP
LOFD-001066 Intra-eNodeB UL CoMP
Intra-BBU interBBP UL CoMP
LOFD-070222 Intra-eNodeB UL CoMP Phase II
Inter-BBU UL CoMP
LOFD-070223 UL CoMP Based on Coordinated BBU
UL CoMP based on relaxed backhaul
LOFD-081219 UL CoMP Based on Relaxed Backhaul
Intra-BBP UL CoMP
LOFD-001066 Intra-eNodeB UL CoMP
Intra-BBU interBBP UL CoMP
LOFD-070222 Intra-eNodeB UL CoMP Phase II
Inter-BBU UL CoMP
LOFD-070223 UL CoMP Based on Coordinated BBU
Intra-BBP UL CoMP
LOFD-001066 Intra-eNodeB UL CoMP
Intra-BBU interBBP UL CoMP
LOFD-070222 Intra-eNodeB UL CoMP Phase II
Inter-BBU UL CoMP
LOFD-070223 UL CoMP Based on Coordinated BBU
Macro-micro UL CoMP
Micro-micro UL CoMP
NOTE
UL CoMP is categorized by application scenario: l Macro-macro UL CoMP is performed in macro cells. l Macro-micro UL CoMP is performed in macro and micro cells. The UE must be a type-1 UL CoMP UE (as defined in 2.3 Related Concepts), the serving cell must be a macro cell, and coordinated cells must be micro cells. l Micro-micro UL CoMP is performed in micro cells. l A macro cell is characterized by high transmit power and large coverage area, and specified by the Cell Scale Indication parameter. l A micro cell is characterized by low transmit power and small coverage area, and specified by the Cell Scale Indication parameter. UL CoMP is divided into different types in each category based on coordination scope and transport bandwidth overhead: "Relaxed Backhaul" in the feature name indicates that the feature is applicable when BBUs are connected through an IP RAN with the transmission delay less than 4 ms.
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eRAN UL CoMP Feature Parameter Description
2 Overview
LOFD-001066 Intra-eNodeB UL CoMP LOFD-001066 Intra-eNodeB UL CoMP uses intra-BBP cell antennas to receive signals from a UE. The serving and coordinated cells are set up on the same BBP and exchange information within this BBP. .
LOFD-070222 Intra-eNodeB UL CoMP Phase II LOFD-070222 Intra-eNodeB UL CoMP Phase II uses intra-BBU inter-BBP cell antennas to receive signals from a UE. The serving and coordinated cells are set up on different BBPs in the same BBU, and they exchange information between the BBPs.
LOFD-070223 UL CoMP based on Coordinated BBU LOFD-070223 UL CoMP based on Coordinated BBU uses inter-BBU cell antennas to jointly receive signals from a UE. The serving and coordinated cells are set up on different BBUs, and they exchange information between the BBUs through universal switching units (USUs).
LOFD-081219 UL CoMP Based on Relaxed Backhaul LOFD-081219 UL CoMP Based on Relaxed Backhaul uses inter-BBU cell antennas to receive signals from a UE. The serving cell and coordinated cells exchange information between BBUs through an existing IP transport network, without additional USUs.
2.3 Related Concepts UL CoMP UE A UL CoMP UE is a UE whose signals are jointly received by the antennas of multiple cells. There are two types of UL CoMP UE: l
Type-1 UL CoMP UE, also called type-1 UE, is located at the cell edge and expected to benefit from signal combining gains.
l
Type-2 UL CoMP UE, also called type-2 UE, is located anywhere in a cell, affected by interference from a type-1 UE, expected to benefit from interference mitigation gains. NOTE
If a UE meets both type-1 and type-2 UE conditions, it is categorized as a type-1 UE.
2-Cell UL CoMP 2-cell UL CoMP uses the antennas of two separate cells to receive signals from a single UE. If each of the two cells has two antennas, a total of four antennas can be used to jointly receive UE signals over the physical uplink shared channel (PUSCH) to improve signal quality.
3-Cell UL CoMP 3-cell UL CoMP uses the antennas of three separate cells to receive signals from a single UE. If each of the three cells has two antennas, a total of six antennas can be used to jointly receive UE signals over the PUSCH to improve signal quality. Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
2 Overview
NOTE
3-cell UL CoMP means that a maximum of two neighboring cells can be selected to work with the serving cell of a UE. 3-cell UL CoMP in the serving cell does not require 3-cell UL CoMP to be activated in the neighboring cells.
Coordinated Cell A coordinated cell is a UE-level concept. It works with the serving cell of a UE to implement UL CoMP. The eNodeB dynamically selects coordinated cells for a UL CoMP UE. This UE will have at least one coordinated cell but may have different coordinated cells at different moments.
Coordinated Set A coordinated set is a UE-level concept. It contains a UE's serving cell and its neighboring cells that work with the serving cell for UL CoMP.
Coordinated Cell List A coordinated cell list is a cell-level concept. It contains the local cell's neighboring cells that can work with the local cell for UL CoMP.
Connection Set A connection set is a cell-level concept. It contains a local cell and all cells that have routes to this local cell. The size of a connection set depends on hardware specifications.
Example Figure 2-1 illustrates the related concepts.
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eRAN UL CoMP Feature Parameter Description
2 Overview
Figure 2-1 Diagram illustrating the related concepts
Concept
Instance
UL CoMP UE
UE 0
Serving cell of UE 0
Cell 3
Coordinated cells of UE 0
Cells 1 and 2
Coordinated set of UE 0
{Cells 1, 2, and 3}
Coordinated cell list of cell 3
Cells 1, 2, 4, and 5
Connection set of cell 3
{Cells 0, 1, 2, 3, 4, and 5}
2.4 Application Scenarios
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eRAN UL CoMP Feature Parameter Description
2 Overview
2.4.1 LOFD-001066 Intra-eNodeB UL CoMP When LOFD-001066 Intra-eNodeB UL CoMP is enabled, the following types of intra-BBP UL CoMP are supported: l
Intra-BBP macro-macro UL CoMP
l
Intra-BBP macro-micro UL CoMP
l
Intra-BBP micro-micro UL CoMP
The following figure uses macro-macro UL CoMP as an example to illustrate intra-BBP UL CoMP. l
If 3-cell UL CoMP is disabled, the serving cell for UE 0 will be cell 3 and the coordinated cell will be either 1 or 2. The coordinated set contains either cells 1 and 3 or cells 2 and 3.
l
If 3-cell UL CoMP is enabled, the serving cell for UE 0 will be cell 3 and the coordinated cells will be 1 and 2. The coordinated set of UE 0 contains all three cells.
Figure 2-2 Intra-BBP UL CoMP
2.4.2 LOFD-070222 Intra-eNodeB UL CoMP Phase II When LOFD-070222 Intra-eNodeB UL CoMP Phase II is enabled together with LOFD-001066 Intra-eNodeB UL CoMP, the following types of intra-BBU UL CoMP are supported: l
Intra-BBU inter-BBP macro-macro UL CoMP
l
Intra-BBU inter-BBP macro-micro UL CoMP
l
Intra-BBU inter-BBP micro-micro UL CoMP
The following figure uses macro-macro UL CoMP as an example to illustrate intra-BBU inter-BBP UL CoMP. l
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eRAN UL CoMP Feature Parameter Description
l
2 Overview
If 3-cell UL CoMP is enabled, the serving cell for UE 0 will be cell 3 and the coordinated cells will be 1 and 2. The coordinated set of UE 0 contains all three cells.
Figure 2-3 Intra-BBU inter-BBP UL CoMP
2.4.3 LOFD-070223 UL CoMP based on Coordinated BBU When LOFD-070223 UL CoMP Based on Coordinated BBU is enabled together with LOFD-001066 Intra-eNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II, the following types of inter-BBU UL CoMP based on coordinated BBU are supported: l
Inter-BBU macro-macro UL CoMP with BBUs connected in centralized, distributed, or centralized+distributed mode
l
Inter-BBU macro-micro UL CoMP with BBUs connected in centralized, distributed, or centralized+distributed mode
l
Inter-BBU micro-micro UL CoMP with BBUs connected in centralized, distributed, or centralized+distributed mode
Figure 2-4 uses macro-macro UL CoMP as an example to illustrate inter-BBU UL CoMP. l
If 3-cell UL CoMP is disabled, the serving cell for UE 0 will be cell 3 and the coordinated cell will be either 1 or 2. The coordinated set contains either cells 1 and 3 or cells 2 and 3.
l
If 3-cell UL CoMP is enabled, the serving cell for UE 0 will be cell 3 and the coordinated cells will be 1 and 2. The coordinated set contains all three cells.
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Figure 2-4 Inter-BBU UL CoMP with BBUs connected in centralized, distributed, or centralized+distributed mode
Table 2-2 Application scenarios in different versions Scenario
eRAN7.0
eRAN8.1
USU interconnection mode
One-level USU interconnection
Two-level USU interconnection
Cloud BB networking mode
Centralized mode
Centralized, distributed, or centralized+distributed mode
NOTE
For details about the Cloud BB networking modes, see USU3900-based Multi-BBU Interconnection Feature Parameter Description and USU3910-based Multi-BBU Interconnection Feature Parameter Description.
2.4.4 LOFD-081219 UL CoMP Based on Relaxed Backhaul When LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled together with LOFD-001066 Intra-eNodeB UL CoMP, LOFD-070222 Intra-eNodeB UL CoMP Phase II, and LOFD-001048 TTI Bundling, macro-macro UL CoMP based on relaxed backhaul is supported. Figure 2-5 illustrates macro-macro UL CoMP based on relaxed backhaul.
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eRAN UL CoMP Feature Parameter Description
2 Overview
l
If 3-cell UL CoMP is disabled, the serving cell for UE 0 will be cell 2 and the coordinated cell will be either 1 or 3. The coordinated set contains either cells 1 and 2 or cells 2 and 3.
l
If 3-cell UL CoMP is enabled, the serving cell for UE 0 will be cell 2 and the coordinated cells will be 1 and 3. The coordinated set contains all three cells.
Figure 2-5 Inter-BBU UL CoMP based on relaxed backhaul
2.4.5 UL CoMP in SFN Scenarios When the single frequency network (SFN) feature LOFD-003029 SFN or LOFD-070205 Adaptive SFN/SDMA is enabled together with one of the following UL CoMP features: l
LOFD-001066 Intra-eNodeB UL CoMP
l
LOFD-070222 Intra-eNodeB UL CoMP Phase II
l
LOFD-070223 UL CoMP Based on Coordinated BBU
The following types of UL CoMP are supported: l
UL CoMP between SFN and non-SFN cells
l
UL CoMP between SFN cells
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Figure 2-6 UL CoMP in SFN scenarios
UL CoMP Between SFN and Non-SFN Cells If 3-cell UL CoMP is disabled, the serving cell for UE 0 in Figure 2-6 will be cell 3, and the coordinated cell will be either physical cell 0-3 in SFN cell 0 or physical cell 1-1 in SFN cell 1. The coordinated set contains physical cell 0-3 and cell 3, or contains physical cell 1-1 and cell 3. If 3-cell UL CoMP is enabled, the serving cell for UE 0 in Figure 2-6 will be cell 3, and the coordinated cells will be physical cell 0-3 in SFN cell 0 and physical cell 1-1 in SFN cell 1. The coordinated set contains the two physical cells and cell 3.
UL CoMP Between SFN Cells The serving cell of UE 1 in Figure 2-6 is physical cell 1-1 in SFN cell 1, and the coordinated cell is physical cell 0-2 in SFN cell 0. The coordinated set of UE 1 contains the two physical cells.
2.5 Benefits 2-cell UL CoMP uses the antennas of two cells to receive signals from a UL CoMP UE. This type of UL CoMP offers higher gains than joint reception by the antennas of only one cell. If Issue 03 (2015-08-31)
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each cell has two receive antennas, a total of four antennas can be used to receive signals from a UL CoMP UE; by contrast, only two antennas can be used to receive a non-UL-CoMP UE. 3-cell UL CoMP uses the antennas of three cells to receive signals from a UL CoMP UE. This type of UL CoMP offers higher performance gains than 2-cell UL CoMP. UL CoMP provides signal combining gains (including diversity gains and array gains) and interference mitigation gains. Generally, the gains increase with the number of receive antennas. For the sources of gains, see 2.5.1 Sources of Gains. For other details about gains, see Receiver Technology Feature Parameter Description. UL CoMP increases the average uplink throughput for CEUs and cells. For data services, UL CoMP improves uplink modulation and coding schemes (MCSs) and reduces transmission delay. For voice over LTE (VoLTE) services, UL CoMP improves uplink MCSs, reduces bit error rates (BERs) in positions very far from the cell center, decreases packet loss rates, and reduces transmission delays, thereby improving voice quality and user experience.
2.5.1 Sources of Gains UL CoMP selects appropriate UEs and receives signals from these UEs by using the antennas of multiple cells (instead of adding more receive antennas) to provide gains for UL CoMP UEs. Depending on UE location, there are two sources of UL CoMP gains: l
Signal combining gains (when a UE is located at the cell edge)
l
Interference mitigation gains (when a UE is located anywhere within a cell)
The following table lists the coordination scopes where UL CoMP provides gains for UEs. Table 2-3 Coordination scopes
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Feature ID
Coordination Scope for Type-1 UE
Coordination Scope for Type-2 UE
LOFD-001066 IntraeNodeB UL CoMP
Intra-BBP cells
Intra-BBP cells except 4R cells (that is, cells each with four receive antennas)
LOFD-070222 IntraeNodeB UL CoMP Phase II
Intra-BBU cells
Intra-BBP cells except 4R cells
LOFD-070223 UL CoMP Based on Coordinated BBU
Intra- or inter-BBU cells
Intra-BBP cells except 4R cells
LOFD-081219 UL CoMP Based on Relaxed Backhaul
Intra- or inter-BBU cells
Intra-BBP cells except 4R cells (that is, cells each with four receive antennas)
NOTE Note that cells that are connected through a relaxed backhaul network between different BBUs can be selected to serve as the coordinated cells for only type-1 UEs that support transmission time interval (TTI) bundling.
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eRAN UL CoMP Feature Parameter Description
Feature ID
2 Overview
Coordination Scope for Type-1 UE
Coordination Scope for Type-2 UE
NOTE LOFD-001066 is a prerequisite feature for LOFD-070222, LOFD-070223, and LOFD-081219. As LOFD-001066 supports intra-BBP UL CoMP for type-2 UEs, the other three features also support intraBBP UL CoMP for type-2 UEs.
The following describes the gains provided by LOFD-001066 Intra-eNodeB UL CoMP. Other UL CoMP features also provide these gains; the only difference is that these features provide higher gains in wider coordination scopes.
Signal Combining Gains Signal combining gains are provided for UEs at the cell edge, as shown in Figure 2-7. For these UEs, the gains are obvious and the received signal quality is improved. Figure 2-7 Signal combining gains
Interference Mitigation Gains Interference mitigation gains are provided for UEs that experience interference from CEUs in neighboring cells. As shown in Figure 2-8, UE 0 experiences interference from UE 1 at the edge of an intra-frequency neighboring cell. The joint interference rejection combining (JIRC) algorithm selects UE 0 as a UL CoMP UE for interference mitigation. The interference mitigation gains are higher when the interference is higher.
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eRAN UL CoMP Feature Parameter Description
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Figure 2-8 Interference mitigation gains
2.5.2 Areas Benefiting from UL CoMP LOFD-001066 Intra-eNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II The following figure represents a simulation of the areas benefiting from LOFD-001066 and LOFD-070222. l
The light blue parts are the areas in which intra- or inter-BBP UL CoMP can be performed for type-1 UEs.
l
The dark blue parts are the areas in which intra-BBP UL CoMP can be performed for type-2 UEs.
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Figure 2-9 Areas benefiting from LOFD-001066 and LOFD-070222
NOTE
The dark red parts indicate the locations of antennas.
Areas Benefiting from Other UL CoMP Features The following figure represents a simulation of the areas benefiting from other UL CoMP features. l
The light blue parts are the areas in which intra-BBP UL CoMP can be performed for type-1 UEs.
l
The dark blue parts are the areas in which intra-BBP UL CoMP can be performed for type-2 UEs.
l
The yellow and light red parts are the areas in which inter-BBP or inter-BBU UL CoMP can be performed. These areas are larger than those benefiting from LOFD-001066 IntraeNodeB UL CoMP.
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eRAN UL CoMP Feature Parameter Description
2 Overview
Figure 2-10 Areas benefiting from other features
NOTE
The dark red parts indicate the locations of antennas.
2.5.3 Level of Gains l
l
l
LOFD-001066 Intra-eNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II –
In macro-macro scenarios, the average cell throughput increases by 0% to 10% and the average CEU throughput increases by 0% to 200%.
–
In macro-micro scenarios, the average uplink UE throughput increases by 0% to 250%.
LOFD-070223 UL CoMP Based on Coordinated BBU –
In macro-macro scenarios, the average cell throughput increases by 0% to 20% and the average CEU throughput increases by 0% to 200%.
–
In macro-micro scenarios, the average uplink UE throughput increases by 0% to 250%.
LOFD-081219 UL CoMP Based on Relaxed Backhaul The VoLTE packet loss rate decreases and therefore the coverage quality for VoLTE increases by 0 dB to 2 dB, provided that the voice quality does not deteriorate (for example, the mean opinion score [MOS] is 3).
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eRAN UL CoMP Feature Parameter Description
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NOTE
The level of gains provided by UL CoMP depends on the following factors: l Proportion of UL CoMP UEs and proportion of UL CoMP PRBs A small proportion of UL CoMP UEs or PRBs leads to lower UL CoMP gains. l Environmental factors, such as interference, networking mode, user distribution, and user services l Other factors, such as the performance before UL CoMP is enabled and the RSRP difference between the serving cell and coordinated cells of a single UE, according to admission tests in labs.
2.6 Evolution of UL CoMP As UL CoMP evolves, the coordination scope becomes increasingly large. Figure 2-11 tracks the evolution of UL CoMP with Huawei eNodeBs. Figure 2-11 Evolution of UL CoMP
The following describes the evolution of UL CoMP features. For a specific version, the UL CoMP capabilities inherited from earlier versions are not presented and only new capabilities are presented.
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eRAN UL CoMP Feature Parameter Description
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Evolution of LOFD-001066 Intra-eNodeB UL CoMP Table 2-4 Evolution of LOFD-001066 Intra-eNodeB UL CoMP eNodeB Version
BBP Model
Number of Cells Supported by a BBP
Receive Mode
Number of Cells in a Coordinated Set
eRAN3.0 and later
LBBPc, LBBPd1, LBBPd2, and LBBPd3
3
2R
2
eRAN6.0 and later
LBBPd2 and LBBPd3
3
4R
2
LBBPd3
6 (3 cells on each frequency)
2R
2
eRAN7.0 and later
LBBPd3
6
2R
2
UBBPd3 and UBBPd4
3
2R
2
UBBPd4 and UBBPd5
3
4R
2
UBBPd5 and UBBPd6
6
2R
2
UBBPd6
6
4R
2
LBBPd3
6
1R, 2R, or 1R+2R
3
LBBPd2, UBBPd3, and UBBPd4
3
1R, 2R, or 1R+2R
3
UBBPd5, UBBPd6, and UMDUa3
6
1R, 2R, or 1R+2R
3
LBBPd3, UBBPd5, UMDUa3
6
4R
2
LBBPd1
3
1R or 1R +2R
3
eRAN8.1
NOTE
xR+yR indicates that UL CoMP can be performed in cells with some in xR mode and the others in yR mode. x and y indicate the numbers of received antennas in different cells. xR+yR is used only when cells involved in UL CoMP have different numbers of receive antennas. For example, 1R+2R indicate that UL CoMP can be performed in cells with some in 1R mode and the others in 2R mode.
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Evolution of LOFD-070222 Intra-eNodeB UL CoMP Phase II Table 2-5 Evolution of LOFD-070222 Intra-eNodeB UL CoMP Phase II eNodeB Version
BBP Model
Receive Mode
Number of Cells in a Coordinate d Set
Scenario
eRAN7.0 and later
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, and UBBPd6
2R
2
Inter-BBU UL CoMP
LBBPd2, LBBPd3, UBBPd4, UBBPd5, and UBBPd6
4R
2
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, and UBBPd6
1R, 2R, or 1R+2R
3
eRAN8.1
Evolution of LOFD-070223 UL CoMP Based on Coordinated BBU Table 2-6 Evolution of LOFD-070223 UL CoMP Based on Coordinated BBU eNodeB Version
BBP Model
Receive Mode
Number of Cells in a Coordinate d Set
Scenario
eRAN7.0 and later
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, and UBBPd6
2R
2
LBBPd2, LBBPd3, UBBPd4, UBBPd5, and UBBPd6
4R
2
Inter-BBU UL CoMP based on coordinated BBU
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, and UBBPd6
1R, 2R, or 1R+2R
3
LBBPd2, LBBPd3, UBBPd4, UBBPd5, and UBBPd6
4R
2
eRAN8.1
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eRAN UL CoMP Feature Parameter Description
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Evolution of LOFD-081219 UL CoMP Based on Relaxed Backhaul Table 2-7 Evolution of LOFD-081219 UL CoMP Based on Relaxed Backhaul eNodeB Version
BBP Model
Receive Mode
Number of Cells in a Coordinated Set
Scenario
eRAN8.1
LBBPd2 and LBBPd3
2R
3
Inter-BBU UL CoMP based on relaxed backhaul
UBBPd3, UBBPd4, UBBPd5, and UBBPd6
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eRAN UL CoMP Feature Parameter Description
3 Technical Description
3
Technical Description
This chapter describes the technical principles of UL CoMP, mainly the following key technologies: l
Selection of UL CoMP UEs and coordinated cells
l
Joint reception by multiple cells' antennas
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eRAN UL CoMP Feature Parameter Description
3 Technical Description
3.1 Basic Process Figure 3-1 shows the basic process of UL CoMP. Figure 3-1 Basic process of UL CoMP
The basic process is implemented through the following functions: l
UL CoMP enabling This function takes effect after the UL CoMP switch is turned on and cell-level parameters such as candidate coordinated cell parameters are configured.
l
Selection of UL CoMP UEs and coordinated cells The eNodeB selects UL CoMP UEs and coordinated cells based on event A3 measurement reports, the number of physical resource blocks (PRBs) available for UL CoMP in the serving cell, and information about PRBs allocated to UEs.
l
Joint reception by multiple cells' antennas The physical layer combines the signals received by the antennas of the serving and coordinated cells of a UL CoMP UE based on information about the UE and coordinated cells.
Among these functions, the second and third are key. They are described in 3.2 Selection of UL CoMP UEs and Coordinated Cells and 3.3 Joint Reception by Multiple Cells' Antennas.
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3.2 Selection of UL CoMP UEs and Coordinated Cells Selecting UL CoMP UEs for Macro-Macro or Micro-Micro UL CoMP Figure 3-2 illustrates the differences in reference signal received power (RSRP) between the cells of an eNodeB to help understand the process of selecting UL CoMP UEs. Figure 3-2 RSRP differences between cells
In the figure, l
The coordinates (0, 0) represent the antenna location.
l
The horizontal and vertical axes represent the distances of UEs from the antenna (unit: m).
l
Different colors indicate different absolute RSRP differences (unit: dB).
RSRP difference is calculated as follows: RSRP difference (dB) = RSRP received from a neighboring cell (dBm) – RSRP received in the serving cell (dBm) The color ribbon on the right of the figure shows the mapping between RSRP differences and colors. For example, the deep blue at the bottom represents an RSRP difference of 0 dB. UEs in different areas can be selected as different types of UEs: l
UEs in the blue area can be selected as type-1 UEs.
l
UEs in the red or yellow areas can be selected as type-2 UEs if they experience interference from type-1 UEs in the blue area.
Measuring RSRP RSRP measurement used in UL CoMP is classified into two types: l Issue 03 (2015-08-31)
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The UE measures the downlink RSRP (DL RSRP) values of the serving cell and neighboring cells based on event A3 parameters configured on the eNodeB. The UE then reports the measurements to the eNodeB. Event A3 in UL CoMP is reported periodically after it is triggered and reported for the first time. This reporting mode is called event-triggered periodic reporting mode. For details, see section 5.5.4.4 "Event A3 (Neighbour becomes offset better than serving)" in 3GPP TS 36.331 V9.9.0. In macro-micro scenarios, there is a large difference in downlink CRS transmit power between macro and micro cells. Therefore, the difference in downlink RSRP must be corrected based on the difference in CRS transmit power so that appropriate UEs can be selected for UL CoMP. l
Uplink RSRP measurement The serving cell and neighboring cells of a UE receive SRSs from the UE and measures the uplink RSRP (UL RSRP) values of these cells.
Selecting Type-1 UEs and Coordinated Cells for Macro-Macro or Micro-Micro UL CoMP After UL CoMP is enabled: 1.
A UE sends UL CoMP A3 measurement reports to the eNodeB when reporting conditions are met.
2.
The eNodeB sorts the reported neighboring cells by RSRP difference in descending order. Then, it selects coordinated cells for this UE from these neighboring cells in that order.
3.
The eNodeB treats the reporting UE as a type-1 UE when the serving cell has sufficient PRBs for UL CoMP.
4.
The UE sends UL CoMP A3 leaving reports to the eNodeB when leaving conditions are met.
5.
The eNodeB no longer treats the UE as a UL CoMP UE when no coordinated cells can be selected from the reported neighboring cells. NOTE
l The UE sends a UL CoMP A3 measurement report if the signal strength of a neighboring cell minus a specific UL CoMP A3 offset is greater than that of the serving cell. For details, see 3GPP TS 36.331. l The UL CoMP A3 offset is specified by the CellUlCompAlgo.UlCompA3Offset or CellUlCompAlgo.UlCompA3OffsetForRelaxedBH parameter. l All A3 parameters for UL CoMP except the A3 offset can be configured in the CellMcPara MO.
In some unusual cases, immediately after a UE is handed over from an intra-frequency neighboring cell, the eNodeB treats this UE as a type-1 UE and treats this cell as a coordinated cell. The reason is that UL CoMP produces significant gains right after a coverage-based intra-frequency handover.
Selecting Type-2 UEs and Coordinated Cells for Macro-Macro or Micro-Micro UL CoMP The selection process is as follows: 1.
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2.
3.
3 Technical Description
The eNodeB treats a UE in a neighboring cell as a type-2 UE when the following conditions are met: –
The PRB location of this UE overlaps that of the type-1 UE.
–
This neighboring cell has enough PRBs for UL CoMP.
The eNodeB treats the serving cell of the type-1 UE as a coordinated cell for the type-2 UE.
Selecting Type-1 UEs and Coordinated Cells for Macro-Micro UL CoMP Selecting UL CoMP UEs and Coordinated Cells for Macro-Micro CoMP Based on Event A3 Before selecting neighboring micro cells as candidate coordinated cells for a UE in a macro cell, the eNodeB needs to correct the RSRP differences based on the transmit power of macro and micro cells. The correction formula is as follows: RSRP difference after correction = RSRP difference before correction + (Pmacro - Pmicro) Pmacro denotes the macro cell's transmit power (dBm). Pmicro denotes the micro cell's transmit power (dBm). The selection process is as follows: 1.
A UE sends UL CoMP A3 measurement reports to the eNodeB when reporting conditions are met.
2.
The eNodeB creates a coordinated set for this UE:
3.
–
The eNodeB corrects the RSRP differences.
–
The eNodeB creates an A3-based neighboring cell list. The neighboring cells on this list must have RSRP differences greater than a specific UL CoMP A3 offset and come from the coordinated cell list of the serving cell.
–
The eNodeB sorts the neighboring cells on the A3-based neighboring cell list by RSRP difference in descending order and selects coordinated cells for the UE from these neighboring cells in that order.
The eNodeB selects type-1 UEs in the same way as for macro-macro UL CoMP.
Selecting UL CoMP UEs and Coordinated Cells for Macro-Micro CoMP Based on Event A3 and SRS 1.
Use parameters to manually create a list in which the neighboring micro cells of a macro cell require sounding reference signal (SRS) measurements. Alternatively, enable a macro cell to automatically generate such a list. In automatic mode, if a neighboring micro cell has treated the macro cell as its neighboring cell based on handover relationships, the macro cell adds this neighboring micro cell to the list.
2.
The eNodeB creates a coordinated set for a UE: –
The eNodeB first creates an SRS-based neighboring cell list for a UE. The neighboring cells on this list meet the following conditions: (1) The RSRP differences between these neighboring cells and the serving cell are greater than a specific UL CoMP A3 offset. Note that the RSRP values are calculated based on SRS measurements. (2) The neighboring cells come from the coordinated cell list of the serving cell.
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eRAN UL CoMP Feature Parameter Description
–
3 Technical Description
The eNodeB then sorts the neighboring cells from the combination of A3-based and SRS-based neighboring cell lists by RSRP difference in descending order. The eNodeB selects coordinated cells for this UE from these neighboring cells in that order to create a coordinated set for the UE.
3.
When the serving cell of the UE has enough PRBs for UL CoMP and the A3- or SRSbased neighboring cell list of the UE is not empty, the eNodeB treats the UE as a type-1 UE.
4.
When both the A3-based and SRS-based neighboring cell lists of the UE are empty, the eNodeB no longer treats the UE as a UL CoMP UE. NOTE
In macro-micro scenarios, the difference in UL RSRP between macro and micro cells may be greater than the UL CoMP A3 offset, but the difference in DL RSRP between macro and micro cells may not be greater than the A3 offset and the UE may not send measurement reports. Therefore, SRS measurement is introduced for selecting coordinated cells for macro-micro UL CoMP. When SRS measurement is used for macro-micro UL CoMP, see "Adding SRS Configurations in HetNet Scenarios" in "Parameter Optimization" for configuration. If the configuration is incorrect, UL CoMP based on UL RSRP cannot take effect.
Selecting Type-1 UEs and Coordinated Cells for UL CoMP in SFN Scenarios For UL CoMP in SFN scenarios, the eNodeB selects type-1 UEs and coordinated cells based on both event A3 and SRS. 1.
A UE sends UL CoMP A3 measurement reports to the eNodeB when reporting conditions are met.
2.
The eNodeB selects the neighboring cells with RSRP differences greater than a specified A3 offset from the coordinated cell list.
3.
–
If the neighboring cells are non-SFN cells, the eNodeB creates an A3-based neighboring cell list. The neighboring cells on this list must have RSRP differences greater than a specific UL CoMP A3 offset and come from the coordinated cell list of the serving cell.
–
If the neighboring cells are SFN cells, the eNodeB creates an SRS-based neighboring cell list in addition to an A3-based neighboring cell list. The neighboring cells on the SRS-based list are physical cells. They must have RSRP differences greater than a specific UL CoMP A3 offset and come from the coordinated cell list of the serving cell. The RSRP values are obtained based on SRS measurements.
The eNodeB sorts the neighboring cells from the combination of A3-based and SRSbased neighboring cell lists by RSRP difference in descending order and selects coordinated cells for the UE from these neighboring cells in that order. NOTE
l If an SFN cell is the serving cell of a UE and its neighboring cells are non-SFN cells, these common cells can be selected as coordinated cells based on A3 measurement reports. The non-SFN cells do not require SRS configurations. l The start SRS subframes must be different between an SFN cell and its neighboring cells (SFN or non-SFN cells). The eNodeB can treat a neighboring SFN cell as a coordinated cell for a UE only when the UE is allocated SRS resource in the start SRS subframe. It is recommended that SRS configurations be added according to the instructions in the "Parameter Optimization" sections. l The procedure for selecting type-2 UEs and coordinated cells in SFN scenarios is the same as that in macro-macro and micro-micro scenarios.
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eRAN UL CoMP Feature Parameter Description
3 Technical Description
3.3 Joint Reception by Multiple Cells' Antennas Joint reception by multiple cells' antennas is similar to joint reception by a single cell's antennas. Interference mitigation gains achieved in multiple cells are a main source of gains for UL CoMP. These gains can be achieved only after the license for LOFD-001012 UL Interference Rejection Combining is purchased and activated. Both joint reception by a single cell's antennas and joint reception by multiple cells' antennas combine signals to improve performance. The difference between them is that joint reception by multiple cells' antennas reuses existing antennas and radio frequency (RF) channels, without adding ones to cells. However, it also provides lower gains, as the signal power received in each cell varies.
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eRAN UL CoMP Feature Parameter Description
4 Related Features
4
Related Features
4.1 Relationships Between UL CoMP Features Relationships between UL CoMP features are as follows: l
LOFD-070222 Intra-eNodeB UL CoMP Phase II requires LOFD-001066 Intra-eNodeB UL CoMP.
l
LOFD-070223 UL CoMP Based on Coordinated BBU requires LOFD-070222 IntraeNodeB UL CoMP Phase II.
l
LOFD-081219 UL CoMP Based on Relaxed Backhaul requires LOFD-070222 IntraeNodeB UL CoMP Phase II.
Figure 4-1 Relationships between UL CoMP features
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eRAN UL CoMP Feature Parameter Description
4 Related Features
4.2 Features Related to LOFD-001066 Intra-eNodeB UL CoMP Prerequisite Features The prerequisite feature is LOFD-001012 UL Interference Rejection Combining. This feature provides interference mitigation gains, a main source of gains for UL CoMP.
Mutually Exclusive Features High Speed Mobility and Ultra High Speed Mobility Rapid changes in channel quality or delay in high or ultra-high speed movement scenarios have a significant impact on joint reception and signal combining. Therefore, when LOFD-001007 High Speed Mobility or LOFD-001008 Ultra High Speed Mobility is enabled, the eNodeB disables UL CoMP, regardless of whether the UL CoMP switch (CellAlgoSwitch.UplinkCompSwitch) is turned on. Frequency Hopping When frequency hopping is enabled (that is, when the CellUlschAlgo.UlHoppingType parameter is not set to Hopping_OFF), the eNodeB automatically disables UL CoMP, regardless of whether the UL CoMP switch is turned on. Remote Radio Unit When the distances between remote radio units (RRUs) and the connected BBU are greater than 20 km, the transmission delays from the RRUs to the BBP cannot meet the UL CoMP requirements. In such a case, you need to turn off the UL CoMP switch.
NOTICE The distances between RRUs and the connected BBU must be less than or equal to 20 km. Multi-RRU Cell If the Cell.MultiRruCellMode parameter is set to DIGITAL_COMBINATION, the eNodeB automatically disables UL CoMP. SFN Based on Coordinated BBU l
LOFD-081208 Inter-eNodeB SFN Based on Coordinated BBU
l
LOFD-081209 Inter-eNodeB adaptive SFN/SDMA Based on Coordinated BBU
UL CoMP is not compatible with these SFN features based on coordinated BBU.
Impacted Features UL CoMP uses the antennas of multiple cells to receive signals over the PUSCH. Therefore, UL CoMP benefits all PUSCH-related features without affecting the applications of these features, for example: Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
l
Transmission time interval (TTI) bundling
l
Voice over IP (VoIP)
l
Radio access network (RAN) sharing
4 Related Features
MU-MIMO The following multi-user multiple-input multiple-output (MU-MIMO) features are impacted: l
LOFD-001002 UL 2x2 MU-MIMO
l
LOFD-001058 UL 2x4 MU-MIMO
For a UE, UL CoMP and MU-MIMO cannot take effect simultaneously although they can be enabled at the same time. UL CoMP for type-1 UEs has the highest priority, MU-MIMO the second, and UL CoMP for type-2 UEs the third. UL ICIC The following uplink inter-cell interference coordination (UL ICIC) features are impacted: l
LBFD-00202202 Uplink Static Inter-Cell Interference Coordination
l
LOFD-00101402 Uplink Dynamic Inter-Cell Interference Coordination
UL ICIC allocates different frequency bands to CEUs to reduce inter-cell interference. Therefore, when UL ICIC is enabled, UL CoMP cannot provide high interference mitigation gains for CEUs. However, the total gains provided by UL ICIC and UL CoMP are higher than the gains provided by only UL ICIC or UL CoMP. Carrier Aggregation The following CA features are impacted: l
LAOFD-001001 LTE-A Introduction
l
LAOFD-001002 Carrier Aggregation for Downlink 2CC in 40MHz
l
LAOFD-070201 Flexible CA from Multiple Carriers
l
LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial]
For a 4R cell, these carrier aggregation (CA) features and UL CoMP can be enabled simultaneously. For a UE, however, these CA features and UL CoMP cannot take effect simultaneously, and the CA features will take precedence over UL CoMP. If LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial] is enabled, the uplink SCell of a UE will not be selected for UL CoMP. SFN The following SFN features are impacted: l
LOFD-003029 SFN
l
LOFD-070205 Adaptive SFN/SDMA
When UL CoMP works with SFN and a local cell has neighboring SFN cells, the eNodeB selects UL CoMP UEs and coordinated cells based on SRS measurements. SRS resources in SFN cells are preferentially allocated to UEs for SFN-related measurement so that the eNodeB can select target RF modules and determine UE attributes. If there are too many UEs in SFN cells, SRS resources may be insufficient and the number of UL CoMP UEs may be less than that in UL CoMP between non-SFN cells. CAMC Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
4 Related Features
The impacted feature is LOFD-081206 Intra-eNodeB Coordinated Uplink AMC. The UL CoMP switch settings for all cells in a coordinated adaptive modulation and coding (CAMC) set must be the same. If the UL CoMP switch settings are changed for some of the cells, the CAMC set will change, which affects CAMC performance. When UL CoMP is disabled, the CAMC A3 offset is determined by the CellUlSchAlgo.UlCamcDlRsrpOffset parameter setting. When UL CoMP is enabled, the CAMC A3 offset is equal to the UL CoMP A3 offset and the CellUlSchAlgo.UlCamcDlRsrpOffset parameter does not take effect. If the UL CoMP A3 offset is different from the CAMC A3 offset, the interference measurement set will change, which affects CAMC performance. Therefore, it is recommended that the UL CoMP A3 offset be equal to the CAMC A3 offset. Other Features The other impacted features include A3-related features, which share all A3 parameters except the A3 offset with UL CoMP. The A3-related features include ICIC, adaptive ICIC (aICIC), enhanced (eICIC), and GSM and LTE FDD Dynamic Spectrum Sharing (GLDSS). The shared A3 parameters are as follows: l
CellMcPara.Hysteresis
l
CellMcPara.TriggerQuantity
l
CellMcPara.ReportQuantity
l
CellMcPara.TimeToTrigger
l
CellMcPara.ReportInterval
l
CellMcPara.ReportAmount
Any changes in the values of these parameters affect both the A3-related features and UL CoMP.
4.3 Features Related to LOFD-070222 Intra-eNodeB UL CoMP Phase II Prerequisite Features LOFD-070222 Intra-eNodeB UL CoMP Phase II requires LOFD-001066 Intra-eNodeB UL CoMP and takes effect only when both features are enabled. The other prerequisite features are the same as those of LOFD-001066 Intra-eNodeB UL CoMP.
Mutually Exclusive Features This feature is mutually exclusive with MRFD-090202 GSM and LTE FDD Dynamic Spectrum Sharing(LTE FDD). The other features mutually exclusive with this feature are the same as those for LOFD-001066 Intra-eNodeB UL CoMP.
Impacted Features The following CA features are impacted: Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
l
LAOFD-001001 LTE-A Introduction
l
LAOFD-001002 Carrier Aggregation for Downlink 2CC in 40MHz
l
LAOFD-070201 Flexible CA from Multiple Carriers
l
LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial]
4 Related Features
For a 4R cell, these CA features and UL CoMP can be enabled simultaneously. For a UE, however, these CA features and UL CoMP cannot take effect simultaneously, and the CA features will take precedence over UL CoMP. If LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial] is enabled, the uplink SCell of a UE will not be selected for UL CoMP. LOFD-070222 Intra-eNodeB UL CoMP Phase II shares the intra-BBU inter-BBP transmission bandwidth with these CA features. When the transmission bandwidth is limited, any feature that fails to obtain bandwidth resources cannot take effect. The other impacted features are the same as those of LOFD-001066 Intra-eNodeB UL CoMP.
4.4 Features Related to LOFD-070223 UL CoMP based on Coordinated BBU Prerequisite Features The prerequisite features include LOFD-001066 Intra-eNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II. LOFD-070223 UL CoMP Based on Coordinated BBU takes effect only when this feature and the prerequisite features are all enabled. The other prerequisite features are the same as those of LOFD-001066 Intra-eNodeB UL CoMP.
Mutually Exclusive Features The features mutually exclusive with this feature are the same as those for LOFD-070222 Intra-eNodeB UL CoMP Phase II.
Impacted Features The following CA features are impacted: l
LAOFD-001001 LTE-A Introduction
l
LAOFD-001002 Carrier Aggregation for Downlink 2CC in 40MHz
l
LAOFD-070201 Flexible CA from Multiple Carriers
l
LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial] For a 4R cell, the CA feature and UL CoMP can be enabled simultaneously. For a UE, however, these features cannot take effect simultaneously, and the CA feature will take precedence over UL CoMP. If LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial] is enabled, the uplink SCell of a UE will not be selected for UL CoMP.
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eRAN UL CoMP Feature Parameter Description
4 Related Features
This feature shares inter-BBU transmission bandwidth with LOFD-070223 UL CoMP Based on Coordinated BBU. When the transmission bandwidth is limited, any feature that fails to obtain bandwidth resources cannot take effect. The other impacted features are the same as those of LOFD-001066 Intra-eNodeB UL CoMP.
4.5 Features Related to LOFD-081219 UL CoMP Based on Relaxed Backhaul Prerequisite Features LOFD-081219 UL CoMP Based on Relaxed Backhaul requires the following features: l
LOFD-001066 Intra-eNodeB UL CoMP
l
LOFD-070222 Intra-eNodeB UL CoMP Phase II
l
LOFD-001048 TTI Bundling NOTE
LOFD-001048 TTI bundling uses the retransmission interval 16 TTIs in the hybrid automatic repeat request (HARQ) mechanism to better adapt to transmission delays induced by relaxed backhaul networks.
LOFD-081219 UL CoMP Based on Relaxed Backhaul takes effect only when this feature and all its prerequisite features are enabled. The other prerequisite features are the same as those of LOFD-001066 Intra-eNodeB UL CoMP.
Mutually Exclusive Features The features mutually exclusive with this feature are the same as those for LOFD-070223 UL CoMP Based on Coordinated BBU.
Impacted Features The following CA features are impacted: l
LAOFD-001001 LTE-A Introduction
l
LAOFD-001002 Carrier Aggregation for Downlink 2CC in 40MHz
l
LAOFD-070201 Flexible CA from Multiple Carriers
l
LAOFD-080202 Carrier Aggregation for Uplink 2CC [Trial]
l
LAOFD-080201 Inter-eNodeB CA based on Relaxed backhaul
For a cell, these CA features can be enabled together with LOFD-081219 UL CoMP Based on Relaxed Backhaul. For a CA UE, cells that are connected through a relaxed backhaul network are not selected as coordinated cells for UL CoMP. eX2 QoS Handling Mechanism When the eNodeB detects that transport queues on an eX2 interface are congested, it triggers back pressure on traffic related to inter-BBU UL CoMP based on relaxed backhaul on the eX2 interface in question or it triggers a removal of coordinated cells connected through the eX2 Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
4 Related Features
interface. As the number of coordinated cells decreases, the data rates of UL CoMP UEs may also decrease. When the eNodeB detects that the congestion is relieved, it either stops the back pressure or restores the coordinated cells. When the eNodeB detects that the transport resource is overloaded, it triggers a removal of the eX2 interface and the coordinated cells connected through the eX2 interface. SFN The following SFN features are impacted: l
LOFD 003029 SFN
l
LOFD-070205 Adaptive SFN/SDMA
These SFN features can be enabled together with LOFD-081219 UL CoMP Based on Relaxed Backhaul. However, UL CoMP cannot be performed in an SFN cell and another cell that are connected through a relaxed backhaul network. The other impacted features are the same as those of LOFD-001066 Intra-eNodeB UL CoMP.
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eRAN UL CoMP Feature Parameter Description
5 Network Impact
5
Network Impact
5.1 LOFD-001066 Intra-eNodeB UL CoMP System Capacity This feature effectively increases the average uplink throughput for UL CoMP UEs and further increases the average uplink throughput for both CEUs and cells.
Network Performance This feature improves MCSs for UL CoMP UEs, reduces the number of transport blocks (TBs) erroneously transmitted in the initial uplink transmission, and effectively increases the average uplink throughput for both CEUs and cells. As the average CEU uplink throughput increases, this feature enhances uplink coverage. In long inter-RRU distance scenarios (for example, in suburban and rural areas), the interference from neighboring cells is weak and therefore this feature does not provide high interference mitigation gains.
5.2 LOFD-070222 Intra-eNodeB UL CoMP Phase II System Capacity This feature provides a larger coordination scope (from intra-BBP cells to intra-BBU interBBP cells) than that provided by LOFD-001066 Intra-eNodeB UL CoMP. This results in an increased average uplink throughput for both intra-BBU inter-BBP cells and CEUs.
Network Performance This feature has the same impacts on network performance as LOFD-001066 Intra-eNodeB UL CoMP.
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eRAN UL CoMP Feature Parameter Description
5 Network Impact
5.3 LOFD-070223 UL CoMP based on Coordinated BBU System Capacity This feature increases the average uplink throughput for both inter-BBU cells and CEUs. This feature expands coordination scope. It supports 3-cell UL CoMP in centralized, distributed, or centralized+distributed Cloud BB scenarios and therefore further increases the average uplink throughput for both cells and CEUs.
Network Performance This feature has the same impacts on network performance as LOFD-001066 Intra-eNodeB UL CoMP.
5.4 LOFD-081219 UL CoMP Based on Relaxed Backhaul System Capacity This feature can be used when transmission performance is affected by transmission delay and bandwidth. This feature has no impact on system capacity.
Network Performance Together with TTI bundling (which is mainly used for voice services), this feature reduces the number of uplink TBs erroneously transmitted during the initial transmission and decreases the packet loss rate, thereby improving voice quality.
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eRAN UL CoMP Feature Parameter Description
6
6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
6.1 When to Use LOFD-001066 Intra-eNodeB UL CoMP When the inter-RRU distance is not greater than 1000 m in urban areas, LOFD-001066 IntraeNodeB UL CoMP is recommended because this feature effectively increases the average uplink throughput for intra-BBP cells and CEUs. In addition: l
In suburban, rural, and other areas where the inter-RRU distance is large, this feature is not recommended.
l
You are advised to optimize parameter settings by referring to the "Parameter Optimization" section to reduce the impact of signaling processing for event A3 measurement reporting in one of the following situations: –
The uplink or downlink PRB usage is greater than 90%.
–
The control channel element (CCE) usage is greater than 80%.
–
The central processing unit (CPU) usage is greater than 80%.
l
If there is intermodulation interference, solve this problem before using this feature.
l
If the difference in cell-specific reference signal (CRS) transmit power between macro and micro cells is greater than or equal to 6 dB, it is recommended that macro-micro UL CoMP based on SRS measurement be used.
l
When both SFN and UL CoMP are enabled, the start SRS subframe of the SFN cell must be different from those of its neighboring cells (common or SFN cells). The eNodeB can select a neighboring SFN cell to serve as a coordinated cell for a UE only when the UE is allocated SRS resource in the start SRS subframe.
6.2 Required Information See 6.4.1 Requirements.
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6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
eRAN UL CoMP Feature Parameter Description
6.3 Planning RF Planning N/A
Network Planning For intra-frequency cells covered by antennas installed on the same pole or tower, it is recommended that these cells be set up on the same BBP. NOTE
When the BBP is restarted or reset, the cells are reestablished. The deployment information for these cells may change and the coordinated cell lists may also change. These changes will affect the performance of UL CoMP.
Hardware Planning For details about the requirements for the BBP models in different UL CoMP scenarios, see 2.6 Evolution of UL CoMP.
6.4 Deployment 6.4.1 Requirements Operating Environment The following table describes the requirements for the operating environment. Table 6-1 Requirements for the operating environment Information to Be Collected
Requirements
eNodeB type
Macro eNodeBs
RRU model
If the LBBPc is used and the cells are configured for UL CoMP, the RRUs must have the same model. Macro-micro and micro-micro UL CoMP in eRAN8.1 allows micro cells to be low power nodes (LPNs), for example, RRU3220E.
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6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
eRAN UL CoMP Feature Parameter Description
Information to Be Collected
Requirements
BBP model
The BBP can be an LBBPc, LBBPd1, LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, UBBPd6, or UMDUa3. As the LBBPc processing capability is limited: l When the cell bandwidth is 10 MHz or less, the LBBPc, LBBPd, or UBBPd can be used. l When the cell bandwidth is greater than 10 MHz, the LBBPd or UBBPd can be used. If the LBBPc is used, the gains provided by UL CoMP may be low.
Number of cells
UL CoMP requires that at least two intra-frequency cells be set up on the same BBP. If UL CoMP is enabled in only one cell, it will not take effect. If more than three cells are established on an LBBPc, all cells on the LBBPc cannot use UL CoMP.
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6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
eRAN UL CoMP Feature Parameter Description
Information to Be Collected
Requirements
Cell configuration
l The cells involved in intra-BBP UL CoMP must have the same frequency, bandwidth, and cyclic prefix (CP) type. These cells can be all in 1R, 2R, or 4R mode; or some in 1R mode and the others in 2R mode. The corresponding UL CoMP is also called 1R, 2R, 4R and 1R+2R UL CoMP. Inter-BBP cells cannot perform UL CoMP. l If a geographically adjacent cell of a local cell is an intra-BBP SFN cell, the two cells must be configured with intra-frequency neighbor relationships for handovers. l Intra-BBP cells must have different physical cell identifiers (PCIs). l An LBBPc, LBBPd1, LBBPd2, LBBPd3, UBBPd3, UBBPd4, or UBBPd5 can be used to support three 2R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd3 or UBBPd5 can be used to support six 2R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd2, LBBPd3, UBBPd4, or UBBPd5 can be used to support three 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd3 can be used to support six 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l A UBBPd5 or UBBPd6 can be used to support six 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd1, LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, UBBPd6, or UMDUa3 can be used to support 1R or 1R+2R UL CoMP. NOTE l 4R UL CoMP can be performed in only two cells. It requires that the UE be a type-1 UE, the modulation scheme be quadrature phase shift keying (QPSK) or 16 Quadrature Amplitude Modulation (16QAM), and the networking mode be any Cloud BB mode other than distributed Cloud BB. l The capabilities of UMDUa3 and UBBPd6 to support UL CoMP are the same as those of UBBPd5 and therefore are not described here. l The LBBPc does not support the selection of coordinated cells for macromicro UL CoMP based on SRS measurement. That is, even when UlHetnetJointReceptionSwitch is turned on, the LBBPc cannot select coordinated cells for macro-micro UL CoMP based on UL RSRP.
Inter-RRU distance
It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m.
NOTE
l The CellAlgoSwitch.UlJRAntNumCombSw parameter settings of the serving cell and coordinated cells must be matched. For example, to enable 1R+2R UL CoMP, turn on the Ul1R2RJRSwitch for both 1R and 2R cells. l Note that 2R UL CoMP and 4R UL CoMP are supported by default, without additional parameter settings.
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6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
eRAN UL CoMP Feature Parameter Description
Transmission Networking None
License The operator has purchased and activated the license for the feature listed in the following table. Feature ID
Feature Name
Model
License Control Item
Network Element (NE)
Sales Unit
LOFD-00106 6
Intra-eNodeB UL CoMP
LT1S0IU LCP00
Intra-eNodeB UL CoMP(FDD)
eNodeB
per cell
This license for LOFD-001066 Intra-eNodeB UL CoMP controls UL CoMP in 2R or 4R cells, depending on the number of receive antennas in the cells. The maximum number of cells that can implement LOFD-001066 Intra-eNodeB UL CoMP is subject to the licensed number. If the number of cells for which the feature is to be enabled is greater than the licensed number, this feature can be enabled only for the licensed number of cells.
Other Features For details, see 4.2 Features Related to LOFD-001066 Intra-eNodeB UL CoMP.
6.4.2 Data Preparation This section describes the data that you need to collect for setting parameters. Required data is data that you must collect for all scenarios. Collect scenario-specific data when necessary for a specific feature deployment scenario. There are three types of data sources: l
Network plan (negotiation not required): parameter values planned and set by the operator
l
Network plan (negotiation required): parameter values planned by the operator and negotiated with the evolved packet core (EPC) or peer transmission equipment
l
User-defined: parameter values set by users
Required Data The following table describes the parameters that must be set in a BaseBandEqm MO to configure baseband equipment information. Suggestion: For cells that are served by RRUs installed on the same pole or tower, configure them on the same BBP. Issue 03 (2015-08-31)
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6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
eRAN UL CoMP Feature Parameter Description
Table 6-2 Parameters related to baseband equipment Parameter Name
Parameter ID
Data Source
Setting Notes
Baseband Equipment ID
BASEBANDEQM.B ASEBANDEQMID
Network plan (negotiation not required)
None
Baseband Equipment Type
BASEBANDEQM.B ASEBANDEQMTYP E
Network plan (negotiation not required)
Set this parameter to ULDL.
UMTS UL Demodulation Mode
BASEBANDEQM.U MTSDEMMODE
Network plan (negotiation not required)
Set this parameter to NULL.
Cabinet No. of Process Unit n
CNn
Network plan (negotiation not required)
n indicates the cabinet number of the BBP, ranging from 0 to 7.
Subrack No. of Process Unit n
SRNn
Network plan (negotiation not required)
n indicates the subrack number of the BBP, ranging from 0 to 1.
Slot No. of Process Unit n
SNn
Network plan (negotiation not required)
n indicates the slot number of the BBP, ranging from 0 to 5.
The following table describes the parameters that must be set in an eUCellSectorEqm MO to configure a set of sector equipment for a cell. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP. Table 6-3 Parameters related to sector equipment for a cell
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Parameter Name
Parameter ID
Data Source
Setting Notes
Local cell ID
eUCellSectorEqm. LocalCellId
Network plan (negotiation not required)
None
Sector equipment ID
eUCellSectorEqm. SectorEqmId
Network plan (negotiation not required)
None
Reference signal power
eUCellSectorEqm. ReferenceSignalPw r
Network plan (negotiation not required)
None
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6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
eRAN UL CoMP Feature Parameter Description
Parameter Name
Parameter ID
Data Source
Setting Notes
Baseband equipment ID
eUCellSectorEqm. BaseBandEqmId
Network plan (negotiation not required)
None
Scenario-specific Data In addition to required data, scenario-specific data also needs to be configured. 1.
The following table describes parameter that must be set in the CellAlgoSwitch MO to configure a UL CoMP switch. Paramete r Name
Parameter ID
Data Source
Setting Notes
UplinkCo mpSwitch
CellAlgoSwi tch.UplinkC ompSwitch
Network plan (negotiation not required)
This parameter specifies whether to enable UL CoMP for a cell. Default value: l UlJointReceptionSwitch:Off l UlJointReception3CellSwitch:Off Recommended value: l UlJointReceptionSwitch:On l UlJointReception3CellSwitch:On Additional setting notes for macromicro scenarios: Default value: l UlHetnetJointReceptionSwitch:Off l UlHetnetCompManualCoCellSw:Off l UlHetnetCompOnUlRsrpSw:Off Recommended value: l UlHetnetJointReceptionSwitch:On l UlHetnetCompManualCoCellSw:Off l UlHetnetCompOnUlRsrpSw:On (when the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell)
2.
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The following table describes the parameter that must be set in the CellAlgoSwitch MO to configure an IRC switch.
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eRAN UL CoMP Feature Parameter Description
Paramete r Name
Parameter ID
Data Source
Setting Notes
PUSCH IRC algorithm switch
CellAlgoSwi tch.PuschIrc AlgoSwitch
Network plan (negotiation not required)
This parameter specifies a PUSCH IRC algorithm. The MrcIrcAdptSwitch option specifies whether to enable adaptive switching between MRC and IRC: l Default value: MrcIrcAdptSwitch:On l Recommended value: MrcIrcAdptSwitch:On
3.
The following table describes the parameter that must be set in a CellUlCompAlgo MO to configure a UL CoMP A3 offset. Parameter Name
Parameter ID
Data Source
Setting Notes
UlCompA3 Offset
CellUlCom pAlgo.UlCo mpA3Offset
Network plan (negotiation not required)
This parameter specifies a UL CoMP A3 offset. The value range is from -30 to +30, with a unit of 0.5 dB. Default value: -20. Recommended value: -20
4.
The following table describes the parameter that must be set in a CellAlgoSwitch MO to configure a combination of cell RX modes. Parameter Name
Parameter ID
Data Source
Setting Notes
UL JR Antenna Number Combined Switch
CellAlgoSw itch.UlJRA ntNumCom bSw
Network plan (negotiation not required)
This parameter specifies a combination of receive modes for UL CoMP. Default value: l Ul1R1RJRSwitch:Off l Ul1R2RJRSwitch:Off Recommended value: l Ul1R1RJRSwitch:Off l Ul1R2RJRSwitch:Off
NOTE
2R UL CoMP and 4R UL CoMP are supported by default after the UL CoMP switch is turned on.
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6.4.3 Precautions For intra-frequency cells covered by antennas installed on the same pole or tower, it is recommended that these cells be configured on the same BBP by referring to Scenariospecific Data.
6.4.4 Hardware Adjustment If the LBBPc is used, the cells to be selected for UL CoMP must be served by the same model of RRUs.
6.4.5 Activation 6.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs Enter the values of the parameters listed in the following table in a summary data file, which also contains other data for the new eNodeBs to be deployed. Then, import the summary data file into the Configuration Management Express (CME) for batch configuration. For detailed instructions, see "Creating eNodeBs in Batches" in the initial configuration guide for the eNodeB, which is available in the eNodeB product documentation. The summary data file may be a scenario-specific file provided by the CME or a customized file, depending on the following conditions: l
The MOs in the following table are contained in a scenario-specific summary data file. In this situation, set the parameters in the MOs, and then verify and save the file.
l
Some MOs in the following table are not contained in a scenario-specific summary data file. In this situation, customize a summary data file to include the MOs before you can set the parameters. Table 6-4 Parameters related to activation of this feature MO
Sheet in the Summary Data File
Parameter Group
Remarks
CellUlCompAl go
eNodeB Radio Data
LocalCellId, UlCompA3Offset
CellAlgoSwitc h
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, PuschIrcAlgoSwitch, UlJRAntNumCombSw
For parameter setting notes, see 6.4.2 Data Preparation.
6.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs Batch reconfiguration using the CME is the recommended method to activate a feature on existing eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure is as follows: Step 1 Customize a summary data file with the MOs and parameters listed in section "Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs." For online help, press Issue 03 (2015-08-31)
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F1 when a CME window is active, and select Managing the CME > CME Guidelines > LTE Application Management > eNodeB Related Operations > Customizing a Summary Data File for Batch eNodeB Configuration. Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Export Data > Export Base Station Bulk Configuration Data (CME client mode), to export the eNodeB data stored on the CME into the customized summary data file. Step 3 In the summary data file, set the parameters in the MOs according to the setting notes provided in section "Data Preparation" and close the file. Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Import Data > Import Base Station Bulk Configuration Data (CME client mode), to import the summary data file into the CME, and then start the data verification. Step 5 After data verification is complete, choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. For detailed operations, see Managing the CME > CME Guidelines > Script File Management > Exporting Incremental Scripts from a Planned Data Area in the CME online help. ----End
6.4.5.3 Using the CME to Perform Single Configuration On the CME, set the parameters listed in the "Data Preparation" section for a single eNodeB. The procedure is as follows: Step 1 In the planned data area, click Base Station in the upper left corner of the configuration window. Step 2 In area 1 shown in Figure 6-1, select the eNodeB to which the MOs belong.
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Figure 6-1 MO search and configuration window
NOTE
l To view descriptions of the parameters in the MO, click in area 4 and press F1. l Area 5 displays the details of a selected area-4 entry in vertical format. Click the "Details" button to show or hide this area.
Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL. Step 4 In area 3, double-click the MO in the Object Name column. All parameters in this MO are displayed in area 4. Step 5 Set the parameters in area 4 or 5. Step 6 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. ----End
6.4.5.4 Using MML Commands MML Commands The activation procedure for intra-BBP UL CoMP is as follows: Step 1 Run the MOD CELLULCOMPALGO command to set a UL CoMP A3 offset. MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; NOTE
The default value is recommended.
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Step 2 To activate this feature, run the MOD CELLALGOSWITCH command to turn on the UlJointReceptionSwitch for each cell involved. l
Macro-macro or micro-micro 2-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1;
l
Macro-micro 2-cell UL CoMP
To activate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to set the UlHetnetJointReceptionSwitch, UlHetnetCompOnUlRsrpSw, and UlHetnetCompManualNcellCfgSw for all macro and micro cells involved. When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetC ompManualNcellCfgSw-0;
When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetC ompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1;
To enable manual configuration of to-be measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on, run the MOD CELLALGOSWITCH command to turn on the corresponding switch and run the MOD EUTRANINTRAFREQNCELL command to set the relationships between intra-frequency macro and micro cells. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
Step 3 To activate 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to set the UlJointReceptionSwitch and UlJointReception3CellSwitch for each cell involved. l
Macro-macro or micro-micro 3-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReception3CellSwitch-1;
l
Macro-micro 3-cell UL CoMP
To activate macro-micro 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to set the UlHetnetJointReceptionSwitch, UlHetnetCompOnUlRsrpSw, and UlHetnetCompManualNcellCfgSw for all macro and micro cells involved. When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReception3CellSwitch-1&UlHetnetJo intReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0;
When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReception3CellSwitch-1&UlHetnetJo intReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1;
To enable manual configuration of to-be measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on, run the MOD CELLALGOSWITCH Issue 03 (2015-08-31)
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command to turn on the corresponding switch and run the MOD EUTRANINTRAFREQNCELL command to set the relationships between intra-frequency macro and micro cells. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
Step 4 To activate 1R UL CoMP, run the MOD CELLALGOSWITCH command to turn on the Ul1R1RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
Step 5 To activate 1R+2R UL CoMP, run the MOD CELLALGOSWITCH command to turn on the Ul1R2RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
Step 6 If the license for LOFD-001012 UL Interference Rejection Combining has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the MrcIrcAdptSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
----End
MML Command Examples NOTE
The commands for activating UL CoMP need to be executed for each cell involved. The following uses the configuration of one cell as an example.
1.
Macro-macro or micro-micro 2-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
2.
Macro-micro 2-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetC ompManualNcellCfgSw-0;
//When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetC ompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1;
//Enabling manual configuration of to-be-measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on Issue 03 (2015-08-31)
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MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
3.
Macro-macro or micro-micro 3-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReception3CellSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
4.
Macro-micro 3-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReception3CellSwitch-1&UlHetnetJo intReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0;
//When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReception3CellSwitch-1&UlHetnetJo intReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1;
//Enabling manual configuration of to-be-measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
6.4.6 Activation Observation The following table describes the activation observation methods. Issue 03 (2015-08-31)
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Table 6-5 Activation observation methods Method
Procedure
Result
Reference
Use MML commands.
Run the DSP CELLULCOMPCLUSTER command to query the observation results.
If there is a cell in the coordinated cell list, the feature has been activated.
6.4.6.1 Using MML Commands
Use signaling.
Create a Uu interface tracing task and check whether the eNodeB delivers a UL CoMP A3 measurement configuration after a UE accesses the network.
If the eNodeB delivers the measurement configuration, the feature has been activated.
6.4.6.2 Using Signaling
Query the number of UL CoMP UEs in a cell on the U2000 client.
On the U2000 client, create a cell-level UL CoMP monitoring task and query the number of UL CoMP UEs in a cell.
If the number of UL CoMP UEs is not 0, the feature has been activated.
6.4.6.3 Querying the Number of UL CoMP UEs in a Cell on the U2000 Client
Query the UL CoMP status of UEs on the U2000 client.
On the U2000 client, create a UE-level UL CoMP monitoring task and query the UL CoMP status of UEs.
If the UEs are CoMP UEs, the feature has been activated.
6.4.6.4 Querying the UL CoMP Status of UEs on the U2000 Client
Use counters.
Query the values of L.ULCoMP.User.Avg (ID: 1526728338), L.ULCoMP.User.Max (ID: 1526728339), and L.ULCoMP.RB (ID: 1526728340).
If any of the counter values is not 0, the feature has been activated.
6.4.6.5 Using Counters
6.4.6.1 Using MML Commands Run the DSP CELLULCOMPCLUSTER command to query the coordinated cell list of one cell or the coordinated cell lists of all cells of the eNodeB. The command output contains the eNodeB IDs and local cell IDs of coordinated cells. If the coordinated cell list is not empty, the feature has been activated.
6.4.6.2 Using Signaling This method applies only to type-1 UEs. If all A3-based features except UL CoMP are disabled, you can determine whether this feature has been activated by observing the signaling. Step 1 Enable a UE to access a cell. Search Figure 6-2 for the RRC_CONN_RECFG message. Double-click the message to see the UL CoMP A3 measurement configuration delivered by Issue 03 (2015-08-31)
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the eNodeB, as shown in Figure 6-3. If the A3 offset in the message is consistent with the UlCompA3Offset parameter value, the feature has been activated. Figure 6-2 Uu tracing results
Figure 6-3 UL CoMP A3 offset
Step 2 Move the UE to the overlapping area between intra-BBP cells. Alternatively, simulate the signal quality at the cell edge by adjusting an attenuator. The UE sends an event A3 measurement report to the eNodeB. The eNodeB determines that this cell is at the cell edge based on the A3 report and selects this UE as a CoMP UE. The eNodeB selects an intra-BBP neighboring cell with the highest signal strength among the reported cells and treats this cell as a coordinated cell.
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Figure 6-4 UL CoMP A3 measurement report
Figure 6-5 UL CoMP A3 measurements
Step 3 Use the UE to perform uplink FTP services, and check the uplink throughput. If the uplink throughput is higher than that before feature activation, the feature takes effect as expected. ----End
6.4.6.3 Querying the Number of UL CoMP UEs in a Cell on the U2000 Client If the query result shows that the number of UL CoMP UEs is not 0, the feature has been activated. The activation observation procedure is as follows: Step 1 On the U2000 client, choose Monitor > Signaling Trace > Signaling Trace Management. Step 2 On the Signaling Trace Management tab page, choose Trace Type > LTE > Cell Performance Monitoring, and then double-click UL CoMP (Cell) Monitoring.
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Figure 6-6 UL CoMP (Cell) Monitoring
Step 3 Enter a task name in the Trace Name text box, select an eNodeB to be monitored, and then click Next. Figure 6-7 Setting basic information
Step 4 Enter the local cell ID, and then click Finish.
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Figure 6-8 Entering the local cell ID
Step 5 Double-click the task in the running state. Figure 6-9 Observing the monitoring task status
Step 6 Observe the number of UL CoMP UEs in the cell. The following figure shows that there is a type-2 UE in the cell.
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Figure 6-10 Observing the number of UL CoMP UEs in the cell
Step 7 Observe the number of different types of UL CoMP UEs in the figure above. For the definitions of type-1 and type-1 UEs, see UL CoMP UE. The following lists the monitoring items: l
UL CoMP Users Num of Scenario 1: Number of UEs that are selected as only type-1 UEs during a sampling period
l
UL CoMP Users Num of Scenario 2: Number of UEs that are selected as only type-2 UEs during a sampling period
l
UL CoMP Users Num of 3 Sectors Scenario: Number of type-1 and type-2 UEs for which only 3-cell UL CoMP has been performed during a sampling period
l
UL CoMP Users Num of mixed Scenario: Number of UEs that are selected as both type-1 and type-2 UEs during a sampling period A UE for which 3-cell UL CoMP has been performed is not only counted in the item UL CoMP Users Num of 3 Sectors Scenario but also counted in other corresponding items
l
Hetnet UL CoMP Users Num of Scenario 1: Number of UEs that are selected as only type-1 UEs and have at least one coordinated cell being a low power node (LPN) during a sampling period
l
Hetnet UL CoMP Users Num of Scenario 2: Number of UEs that are selected as only type-2 UEs and have at least one coordinated cell being an LPN during a sampling period
l
Hetnet UL CoMP Users Num of mixed Scenario: Number of UEs that are selected as both type-1 and type-2 UEs and have at least one coordinated cell being a low power node (LPN) during a sampling period
----End
6.4.6.4 Querying the UL CoMP Status of UEs on the U2000 Client If the query result shows that there are UL CoMP UEs, the feature has been activated. The activation observation procedure is as follows: Issue 03 (2015-08-31)
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Step 1 On the U2000 client, choose Monitor > Signaling Trace > Signaling Trace Management. Step 2 On the Signaling Trace Management tab page, choose Trace Type > LTE > User Performance Monitoring, and then double-click UL CoMP (User) Monitoring. Figure 6-11 UL CoMP (User) Monitoring
Step 3 Enter a task name in the Trace Name text box, select an eNodeB to be monitored, and then click Next, as shown in the following figure. Figure 6-12 Setting basic information of the monitoring task
Step 4 Set MMEc and mTMSI (see details in 3GPP TS 36.331), and then click Finish. Issue 03 (2015-08-31)
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Figure 6-13 Setting MMEc and mTMSI
Step 5 Double-click the task in the running state. Figure 6-14 Observing the monitoring task status
Step 6 Observe the UL CoMP status of UEs. Figure 6-15 Querying the UL CoMP status of UEs
The digits in this figure and the values of the UL CoMP User Indication field in the preceding table have one-to-one relationships: l
0: Normal User, that is, non-UL-CoMP user
l
1: UL CoMP User of Scenario 1
l
2: UL CoMP User of Scenario 2
l
3: UL CoMP User of mixed Scenario
l
4: Hetnet UL CoMP User of Scenario 1
l
5: Hetnet UL CoMP User of Scenario 2
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l
6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
6: Hetnet UL CoMP User of mixed Scenario
For details about UL CoMP Users Num of Scenario 1 and UL CoMP Users Num of Scenario 2, see 2.5.1 Sources of Gains. The UL CoMP Users Num of mixed Scenario field provides the number of UEs that were selected as both type-1 and type-2 UEs during the sampling period. ----End
6.4.6.5 Using Counters When there are UEs that meet the UL CoMP requirements, you can check whether this feature has been activated by observing the following counters: l
L.ULCoMP.User.Avg (ID:1526728338)
l
L.ULCoMP.User.Max (ID: 1526728339)
l
L.ULCoMP.RB (ID: 1526728340)
If the value of any counter is not 0, this feature has been activated. The activation observation procedure is as follows: Step 1 On the U2000 client, choose Performance > Query Result. The Untitled tab page is displayed. Figure 6-16 Result query
Step 2 Right-click on the Untitled tab page, and then choose New Query from the shortcut menu. Figure 6-17 New query
Step 3 On the Object tab page in the New Query dialog box, select eNodeBs, and then click > to move the eNodeBs to the right pane. Issue 03 (2015-08-31)
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Figure 6-18 Object setting
Step 4 Select counters as follows: In the left pane, choose eNodeB > Measurements related to Channel(LTE) > PRB Measurement. On the Counter tab page, select L.ULCoMP.RB and click > to move this counter to the right pane. In the left pane, choose eNodeB > Measurements related to ChMeas > Measurements related to Traffic(LTE) > Cell User Quantity Measurement. On the Counter tab page, select L.ULCoMP.User.Max and L.ULCoMP.User.Avg, and click > to move the two counters to the right pane. In addition to selecting counters, you can also set the measurement period to 15 or 60 minutes, as shown in Figure 6-19. Figure 6-19 Counter setting
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NOTE
To observe the activation of LOFD-070222, move L.ChMeas.ULCoMPPhase2.PRB.Avg to the right pane. To observe the activation of LOFD-070223, move L.ChMeas.ULOverBBUCoMP.PRB.Avg to the right pane. You can find the two counters by choosing eNodeB > Measurements related to Channel(LTE) > PRB Measurement.
Step 5 On the Other tab page, click Custom, set the measurement time, and then click Query. Figure 6-20 Time setting
Step 6 Observe the changes in the status of UL CoMP UEs. Figure 6-21 Query results
----End
6.4.7 Reconfiguration N/A Issue 03 (2015-08-31)
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6.4.8 Deactivation 6.4.8.1 Using the CME to Perform Batch Configuration Batch reconfiguration using the CME is the recommended method to deactivate a feature on eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure for feature deactivation is similar to that for feature activation described in 6.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs. In the procedure, modify parameters according to the following table. Table 6-6 Parameters related to deactivation of this feature MO
Sheet in the Summary Data File
Parameter Group
Setting Notes
CELLALGOSW ITCH
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, UlJRAntNumCombSw
For parameter setting notes, see 6.4.2 Data Preparation.
6.4.8.2 Using the CME to Perform Single Configuration On the CME, set parameters according to 6.4.8.1 Using the CME to Perform Batch Configuration. For detailed instructions, see 6.4.5.3 Using the CME to Perform Single Configuration described for feature activation.
6.4.8.3 Using MML Commands MML Commands l
To deactivate 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlJointReception3CellSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
To deactivate the selection of coordinated cells based on UL RSRP for macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlHetnetCompOnUlRsrpSw switch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompOnUlRsrpSw-0;
l
To deactivate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlHetnetJointReceptionSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetJointReceptionSwitch-0;
l
To deactivate LOFD-001066 Intra-eNodeB UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlJointReceptionSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-0;
l
To deactivate 1R UL CoMP, run the MOD CELLALGOSWITCH command to turn off the Ul1R1RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-0;
l
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MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-0;
NOTICE After a feature is deactivated, no dependent features can take effect.
MML Command Examples NOTE
To deactivate one type of UL CoMP, the corresponding command needs to be executed for each cell involved. The following uses the configuration of one cell as an example.
l
Deactivating 3-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
Deactivating the selection of coordinated cells based on UL RSRP for macro-micro UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompOnUlRsrpSw-0;
l
Deactivating macro-micro UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetJointReceptionSwitch-0;
l
Deactivating LOFD-001066 Intra-eNodeB UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-0;
l
Deactivating 1R UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-0;
l
Deactivating 1R+2R UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-0;
6.5 Performance Monitoring The following table lists the counters and expected results after feature activation. Table 6-7 Counters and expected results Counter
Expected Result
L.ChMeas.PUSCH.MCS.0 through L.ChMeas.PUSCH.MCS. 28
The average value of modulation and coding scheme (MCS) indexes increases.
L.ULCoMP.User.Avg
The average or maximum number of UL CoMP UEs increases, indicating higher gains.
L.ULCoMP.User.Max L.ULCoMP.RB
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The number of UL CoMP PRBs increases, indicating higher gains.
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Counter
Expected Result
L.Thrp.bits.UL
The average uplink UE throughput increases.
L.Thrp.Time.UL
Average uplink UE throughput = L.Thrp.bits.UL/ L.Thrp.Time.UL where l L.Thrp.bits.UL indicates the total traffic volume of uplink protocol data units (PDUs) received at the Packet Data Convergence Protocol (PDCP) layer in a cell. l L.Thrp.Time.UL indicates the total duration of receiving uplink PDUs at the PDCP layer in a cell.
Monitoring Uplink MCSs The counters used to monitor uplink MCSs are L.ChMeas.PUSCH.MCS.0 (ID: 1526727412) to L.ChMeas.PUSCH.MCS.28 (ID: 1526727440). The long-term (≥ 24 hours) measurement result indicates that the number of large MCS indexes increases after feature activation, as shown in the following figure. Figure 6-22 Comparison of the performance with UL CoMP and without UL CoMP
Monitoring the Number of UL CoMP UEs The counters used to monitor the average and maximum numbers of UL CoMP UEs are L.ULCoMP.User.Avg (ID: 1526728338) and L.ULCoMP.User.Max (ID: 1526728339). If the value of either counter is small, the number of UEs selected for UL CoMP is small and the gains provided by UL CoMP are not obvious. If the values of both counters are large, the gains provided by UL CoMP are high.
Monitoring the Proportion of UL CoMP PRBs If the proportion of UL CoMP PRBs is high, the increase in the uplink throughput is obvious. Proportion of UL CoMP PRBs = L.ULCoMP.RB/(L.ChMeas.PRB.UL.Used.Avg – L.ChMeas.PRB.PUCCH.Avg) where Issue 03 (2015-08-31)
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l
L.ULCoMP.RB (ID: 1526728340): indicates the average number of PRBs allocated to UL CoMP UEs.
l
L.ChMeas.PRB.UL.Used.Avg (ID: 1526726737): indicates the average number of PRBs allocated to all UEs on uplink channels.
l
L.ChMeas.PRB.PUCCH.Avg (ID: 1526727483): indicates the average number of PRBs allocated to physical uplink control channel (PUCCH).
The gains provided by UL CoMP also depend on other factors such as interference, networking mode, user distribution, and user services. Therefore, the specific gains cannot be directly quantified by these counters.
Monitoring the Average UE Uplink Throughput UL CoMP can increase the average UE uplink throughput. Average uplink UE throughput = L.Thrp.bits.UL/L.Thrp.Time.UL where l
L.Thrp.bits.UL (ID: 1526728259): indicates the total traffic volume of uplink PDU data received at the PDCP layer in a cell.
l
L.Thrp.Time.UL (ID: 1526728260): indicates the total duration of receiving uplink data at the PDCP layer in a cell NOTE
The gains provided by UL CoMP also depend on interference, networking mode, user distribution, user services, and other factors.
6.6 Parameter Optimization Reducing Signaling Overhead UL CoMP for type-1 UEs increases the amount of Uu signaling because the UEs report measurements every 5 seconds. To reduce signaling overhead, you can change the number of A3 measurement reports to 1 when other A3-dependent features (such as ICIC, aICIC, eICIC, CSPC, and GLDSS) are not used, by running the following command: MOD CELLMCPARA: LocalCellId=0, ReportAmount=r1; NOTE
The change does not affect the performance of UL CoMP. The eNodeB can still determine whether to enable UL CoMP for UEs based on event-triggered UL CoMP A3 measurements.
To further reduce the number of A3 measurement reports and signaling overhead, you can reduce the UL CoMP A3 offset by running the following command: MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-6;
Preventing Uplink Throughput Decrease UL CoMP will result in decreases in uplink throughput when the LBBPc is used and interference from coordinated cells is hard to reduce. Issue 03 (2015-08-31)
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To prevent the decrease, you can use the UL CoMP rollback switch CellAlgoSwitch.UplinkCompSwitch.UlCompRollbackSwitch. When this switch is on, the eNodeB detects signal and interference changes in the serving and neighboring cells in real time. If the eNodeB finds out that interference from neighboring cells is hard to mitigate, it does not perform UL CoMP. The command for turning on the switch is as follows: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlCompRollbackSwitch-1;
Generating PCI Conflict Alarms PCI conflicts between intra-frequency neighboring cells have a negative impact on the performance of UL CoMP. You are advised to turn on the PCI conflict alarm switch so that PCI collision or confusion can be reported. The command for turning on the switch is as follows: MOD ENODEBALGOSWITCH: PciConflictAlmSwitch=ON;
Setting SRS Parameters for Macro-Micro UL CoMP If selection of coordinated cells based on UL RSRP is enabled for macro-micro UL CoMP, the SRS configuration procedure does not work. Without SRS configuration, a cell cannot perform such a selection. Therefore, manually setting SRS parameters is required in this case. To set SRS parameters, perform the following steps: Step 1 Run the MOD SRSCFG command to set SrsCfgInd to BOOLEAN_TRUE, FddSrsCfgMode to DEFAULTMODE, and SrsSubframeCfg based on the result of (PCI mod 3) +3. The following assumes that the PCI is 0. MOD SRSCFG: LocalCellId=0, SrsSubframeCfg=SC3,SrsCfgInd=BOOLEAN_TRUE, FddSrsCfgMode=DEFAULTMODE;
Step 2 Run the MOD CELLSRSADAPTIVECFG command to set SRS reporting period adaptation parameters. Set SrsPeriodAdaptive to OFF and UserSrsPeriodCfg to ms40. MOD CELLSRSADAPTIVECFG: LocalCellId=0, SrsPeriodAdaptive=OFF, UserSrsPeriod=ms40;
----End
Adjusting SRS Parameters for UL CoMP in SFN Scenarios SRS parameters are configured for SFN cells during cell setup. After SFN and UL CoMP are both enabled, the SRS configuration procedure does not work. If a neighboring cell of an SFN cell does not have SRS parameters configured, this neighboring cell cannot select the SFN cell for UL CoMP. If the neighboring cell has SRS parameters configured but it has the same start SRS subframe as the SFN cell or does not have uplink-downlink subframe configuration SC3, SC4, or SC5, the neighboring cell also cannot select the SFN cell for UL CoMP. Run the following command to check the SRS parameters of each cell: LST SRSCFG: LocalCellId=0;
If a neighboring cell of an SFN cell does not have SRS parameters configured, the SFN cell cannot select it for UL CoMP. If a neighboring cell of an SFN cell has SRS parameters configured and the FDDRESMODE.SfnCapabilityMode parameter is set to NORMAL, you can adjust the SRS parameters as follows: Issue 03 (2015-08-31)
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1.
6 Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP
Run the MOD SRSCFG command to set SrsCfgInd to BOOLEAN_TRUE, FddSrsCfgMode to DEFAULTMODE, and SrsSubframeCfg based on the result of (PCI mod 3) +3. The following assumes that the PCI is 0. MOD SRSCFG: LocalCellId=0, SrsSubframeCfg=SC3,SrsCfgInd=BOOLEAN_TRUE, FddSrsCfgMode=DEFAULTMODE;
2.
Run the MOD CELLSRSADAPTIVECFG command to set SRS reporting period adaptation parameters. Set SrsPeriodAdaptive to OFF and UserSrsPeriodCfg to ms40. MOD CELLSRSADAPTIVECFG: LocalCellId=0,SrsPeriodAdaptive=OFF,UserSrsPeriod=ms40;
NOTICE l Changing the SRS configuration of an in-service cell would result in the automatic reset of the cell. l For the impact of SRS configuration on performance, see Physical Channel Resource Management Feature Parameter Description.
6.7 Troubleshooting Fault Description After UL CoMP is enabled, the uplink throughput of CEUs in a cell does not increase under the same conditions as before UL CoMP is enabled. After UL CoMP is enabled across the entire network, the values of counters L.ULCoMP.User.Avg (ID: 1526728338), L.ULCoMP.User.Max (ID: 1526728339), and L.ULCoMP.RB (ID: 1526728340) of some or all cells remain 0.
Fault Handling Step 1 Check related alarms, for example, an alarm that indicates the capacity of a cell decreases. If there is such an alarm, handle the alarm according to the instructions in eNodeB Alarm Reference. If there is not such alarm, go to Step 2. Step 2 Run the LST CELLALGOSWITCH command to check the UL CoMP switch setting. If the switch is turned off, turn it on and end the troubleshooting. If the switch is turned on, go to Step 3. Step 3 Run the DSP LICINFO command to check the Actual Used value of Intra-eNodeB UL CoMP(FDD). l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is 0, go to Step 4 and Step 5.
l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is not 0, go to Step 6 and Step 7.
Step 4 Modify eNodeB configurations if they do not meet the UL CoMP deployment requirements. Step 5 Check whether there are mutually exclusive features by referring to 4.2 Features Related to LOFD-001066 Intra-eNodeB UL CoMP. If there are, end the troubleshooting. Otherwise, go to Step 8. Issue 03 (2015-08-31)
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Step 6 Run the DSP CELLULCOMPCLUSTER command to check the coordinated cell list. If there are coordinated cells, go to Step 7. Otherwise, go to Step 8. Step 7 Check whether the cells selected for UL CoMP meet the requirements for the operating environment. If the cells do not, end the troubleshooting. If the cells do, go to Step 8. Step 8 Contact Huawei technical support. ----End
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7 Engineering Guidelines for LOFD-070222 Intra-eNodeB UL CoMP Phase II
Engineering Guidelines for LOFD-070222 Intra-eNodeB UL CoMP Phase II
7.1 When to Use LOFD-070222 Intra-eNodeB UL CoMP Phase II If the inter-RRU distance is not greater than 1000 m in urban areas, the Intra-eNodeB UL CoMP Phase II function is recommended because it supports intra-BBU UL CoMP and effectively increases the average uplink throughput for cells and CEUs. l
In suburban, rural, and other areas where the inter-RRU distance is large, this feature is not recommended.
l
You are advised to optimize parameter settings by referring to the "Parameter Optimization" section to reduce the impact of signaling processing for event A3 measurement reporting in one of the following situations: –
The uplink or downlink PRB usage is greater than 90%.
–
The control channel element (CCE) usage is greater than 80%.
–
The central processing unit (CPU) usage is greater than 80%.
l
If there is intermodulation interference, solve this problem before using this feature.
l
If the difference in cell-specific reference signal (CRS) transmit power between macro and micro cells is greater than or equal to 6 dB, it is recommended that macro-micro UL CoMP based on SRS measurement be used.
l
When both SFN and UL CoMP are enabled, the start SRS subframe of the SFN cell must be different from those of its neighboring cells (common or SFN cells). The eNodeB can select a neighboring SFN cell to serve as a coordinated cell for a UE only when the UE is allocated SRS resource in the start SRS subframe.
7.2 Required Information See 7.4.1 Requirements.
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NOTE
This feature shares system resources with SFN, CA, and CSPC. Before deploying this feature, contact Huawei engineers for resource audit.
7.3 Planning RF Planning N/A
Network Planning This feature can be implemented only among cells in the same connection set. If a BBU3900 is used, an intra-BBU connection set must contain at least one LBBPd or UBBPd installed in slot 2 or 3. If a BBU3910 is used, there is no restriction on an intra-BBU connection set. For intra-frequency cells covered by antennas installed on the same pole or tower, it is recommended that these cells be set up on the same BBP and bound to baseband equipment. Geographically adjacent intra-frequency cells should be established on the same BBP or the BBPs whose cells compose a connection set and be bound to baseband equipment. NOTE
When the BBP is restarted or reset, the cells are reestablished. The deployment information for these cells may change and the coordinated cell lists may also change. These changes will affect the performance of UL CoMP.
Hardware Planning For the requirements on BBP models in different UL CoMP scenarios, see 2.6 Evolution of UL CoMP.
7.4 Deployment 7.4.1 Requirements Operating Environment LOFD-070222 Intra-eNodeB UL CoMP Phase II requires LOFD-001066 Intra-eNodeB UL CoMP and takes effect only when both features are enabled. The following table describes the requirements for the operating environment.
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eRAN UL CoMP Feature Parameter Description
Table 7-1 Requirements for the operating environment Information to Be Collected
Requirements
eNodeB type
Macro eNodeBs
RRU model
Macro-micro and micro-micro UL CoMP allows micro cells to be LPNs, for example, RRU3220E.
BBP model
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, or UBBPd6
Number of cells
UL CoMP requires at least two intra-frequency cells in a connection set. If UL CoMP is enabled in only one cell, it will not take effect.
Cell configuration
l UL CoMP can be performed in intra-BBU inter-BBP cells. The serving cell and coordinated cells must be configured in the same connection set. For details, see 7.3 Planning. l The cells that are geographically adjacent must be configured as intra-frequency neighboring cells with different PCIs. l The cells involved in UL CoMP must have the same frequency, bandwidth, and CP type. These cells can be all in 1R, 2R, or 4R mode; or some in 1R mode and the other in 2R mode. The corresponding UL CoMP is also called 1R, 2R, 4R and 1R+2R UL CoMP. l An LBBPd2, LBBPd3, UBBPd4, or UBBPd5 can be used to support three 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd3 can be used to support six 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l A UBBPd3 can be used to support three 2R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l A UBBPd5 or UBBPd6 can be used to support six 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l The cells can be set up on different models of LBBP, UBBP, or both. l An LBBPd1, LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, UBBPd6, or UBBPda can be used to support 1R or 1R+2R UL CoMP. NOTE 4R UL CoMP can be performed in only two cells. It requires that the UE be a type-1 UE, the modulation scheme be QPSK or 16QAM, and the networking mode be any Cloud BB mode other than distributed Cloud BB.
Inter-RRU distance
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It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m.
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eRAN UL CoMP Feature Parameter Description NOTE
The CellAlgoSwitch.UlJRAntNumCombSw parameter settings of the serving cell and coordinated cells must be matched. For example, to enable 1R+2R UL CoMP, turn on the Ul1R2RJRSwitch for both 1R and 2R cells. Note that 2R UL CoMP and 4R UL CoMP are supported by default, without additional parameter settings.
Transmission Networking None
License The operator has purchased and activated the license for the feature listed in the following table. Feature ID
Feature Name
Model
License Control Item
NE
Sales Unit
LOFD-070 222
LOFD-070222 Intra-eNodeB UL CoMP Phase II
LT1SIUL CP200
Intra-eNodeB UL CoMP Phase II(FDD)
eNodeB
per cell
The number of cells that can implement LOFD-070222 Intra-eNodeB UL CoMP Phase II is subject to the licensed number. If the number of cells for which the feature is to be enabled is greater than the licensed number, this feature can be enabled only for the licensed number of cells. To deploy LOFD-070222 Intra-eNodeB UL CoMP Phase II, the license for LOFD-001066 Intra-eNodeB UL CoMP must be purchased and activated.
Other Features For details, see 4.3 Features Related to LOFD-070222 Intra-eNodeB UL CoMP Phase II.
7.4.2 Data Preparation This section describes the data that you need to collect for setting parameters. Required data is data that you must collect for all scenarios. Collect scenario-specific data when necessary for a specific feature deployment scenario. There are three types of data sources: l
Network plan (negotiation not required): parameter values planned and set by the operator
l
Network plan (negotiation required): parameter values planned by the operator and negotiated with the EPC or peer transmission equipment
l
User-defined: parameter values set by users
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eRAN UL CoMP Feature Parameter Description
Required Data The following table describes the parameters that must be set in a BaseBandEqm MO to configure baseband equipment information. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP, and intra-frequency cells that are geographically adjacent but served by RRUs installed on different poles or towers be configured in the same connection set. For details, see 7.3 Planning. Table 7-2 Parameters related to baseband equipment Parameter Name
Parameter ID
Data Source
Setting Notes
Baseband Equipment ID
BASEBANDEQM.B ASEBANDEQMID
Network plan (negotiation not required)
-
Baseband Equipment Type
BASEBANDEQM.B ASEBANDEQMTYP E
Network plan (negotiation not required)
Set this parameter to ULDL.
UMTS UL Demodulation Mode
BASEBANDEQM.U MTSDEMMODE
Network plan (negotiation not required)
Set this parameter to NULL.
Cabinet No. of Process Unit n
CNn
Network plan (negotiation not required)
n indicates the cabinet number of the BBP, ranging from 0 to 7.
Subrack No. of Process Unit n
SRNn
Network plan (negotiation not required)
n indicates the subrack number of the BBP, ranging from 0 to 1.
Slot No. of Process Unit n
SNn
Network plan (negotiation not required)
n indicates the slot number of the BBP, ranging from 0 to 5.
The following table describes the parameters that must be set in an eUCellSectorEqm MO to configure a set of sector equipment for a cell. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP. Table 7-3 Parameters related to sector equipment for a cell
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Parameter Name
Parameter ID
Data Source
Setting Notes
Local cell ID
eUCellSectorEqm. LocalCellId
Network plan (negotiation not required)
-
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Parameter Name
Parameter ID
Data Source
Setting Notes
Sector equipment ID
eUCellSectorEqm. SectorEqmId
Network plan (negotiation not required)
-
Reference signal power
eUCellSectorEqm. ReferenceSignalPw r
Network plan (negotiation not required)
-
Baseband equipment ID
eUCellSectorEqm. BaseBandEqmId
Network plan (negotiation not required)
-
Scenario-specific Data In addition to required data, scenario-specific data also needs to be configured. 1.
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The following table describes the parameter that must be set in the CellAlgoSwitch MO to configure a UL CoMP switch.
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eRAN UL CoMP Feature Parameter Description
Paramete r Name
Parameter ID
Data Source
Setting Notes
UplinkCo mpSwitch
CellAlgoS witch.Upli nkCompSw itch
Network plan (negotiation not required)
This parameter specifies whether to enable UL CoMP for a cell. Default value: l UlJointReceptionSwitch:Off l UlJointReceptionPhaseIISwitch:Off l UlJointReception3CellSwitch:Off Recommended value: l UlJointReceptionSwitch:On l UlJointReceptionPhaseIISwitch:On l UlJointReception3CellSwitch:On Additional setting notes for macro-micro scenarios: Default value: l UlHetnetJointReceptionSwitch:Off l UlHetnetCompManualCoCellSw:Off l UlHetnetCompOnUlRsrpSw:Off Recommended value: l UlHetnetJointReceptionSwitch:On l UlHetnetCompManualCoCellSw:On l UlHetnetCompOnUlRsrpSw:On (when the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell)
2.
The following table describes the parameter that must be set in the CellAlgoSwitch MO to configure an IRC switch. Paramete r Name
Parameter ID
Data Source
Setting Notes
PUSCH IRC algorithm switch
CellAlgoSwi tch.PuschIrc AlgoSwitch
Network plan (negotiation not required)
This parameter specifies a PUSCH IRC algorithm. The MrcIrcAdptSwitch option specifies whether to enable adaptive switching between MRC and IRC: l Default value: MrcIrcAdptSwitch:On l Recommended value: MrcIrcAdptSwitch:On
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eRAN UL CoMP Feature Parameter Description
3.
The following table describes the parameter that must be set in a CellUlCompAlgo MO to configure a UL CoMP A3 offset. Parameter Name
Parameter ID
Data Source
Setting Notes
UlCompA3 Offset
CellUlCom pAlgo.UlCo mpA3Offset
Network plan (negotiation not required)
This parameter specifies a UL CoMP A3 offset. The value range is from -30 to +30, with a unit of 0.5 dB. Default value: -20. Recommended value: -20
4.
The following table describes the parameter that must be set in a CellAlgoSwitch MO to configure a combination of cell RX modes. Parameter Name
Parameter ID
Data Source
Setting Notes
UL JR Antenna Number Combined Switch
CellAlgoSw itch.UlJRA ntNumCom bSw
Network plan (negotiation not required)
This parameter specifies a combination of receive modes for UL CoMP. Default value: l Ul1R1RJRSwitch:Off l Ul1R2RJRSwitch:Off Recommended value: l Ul1R1RJRSwitch:Off l Ul1R2RJRSwitch:Off
NOTE
2R UL CoMP and 4R UL CoMP are supported by default after the UL CoMP switch is turned on.
7.4.3 Precautions During scenario-specific data preparation in 7.4.2 Data Preparation, the cells that are served by RRUs installed on the same pole or tower must be set up on the same BBP. The geographically adjacent cells that are served by RRUs installed on different poles or towers must be configured in the same connection set. For details, see 7.3 Planning.
7.4.4 Hardware Adjustment It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m.
7.4.5 Activation 7.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs Enter the values of the parameters listed in the following table in a summary data file, which also contains other data for the new eNodeBs to be deployed. Then, import the summary data Issue 03 (2015-08-31)
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file into the CME for batch configuration. For detailed instructions, see "Creating eNodeBs in Batches" in the initial configuration guide for the eNodeB, which is available in the eNodeB product documentation. The summary data file may be a scenario-specific file provided by the CME or a customized file, depending on the following conditions: l
The MOs in the following table are contained in a scenario-specific summary data file. In this situation, set the parameters in the MOs, and then verify and save the file.
l
Some MOs in the following table are not contained in a scenario-specific summary data file. In this situation, customize a summary data file to include the MOs before you can set the parameters. Table 7-4 Parameters related to activation of this feature MO
Sheet in the Summary Data File
Parameter Group
Remarks
CellUlCompAl go
eNodeB Radio Data
LocalCellId, UlCompA3Offset
User-defined sheet
CellAlgoSwitc h
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, PuschIrcAlgoSwitch, UlJRAntNumCombSw
User-defined sheet
7.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs Batch reconfiguration using the CME is the recommended method to activate a feature on existing eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure is as follows: Step 1 Customize a summary data file with the MOs and parameters listed in section "Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs." For online help, press F1 when a CME window is active, and select Managing the CME > CME Guidelines > LTE Application Management > eNodeB Related Operations > Customizing a Summary Data File for Batch eNodeB Configuration. Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Export Data > Export Base Station Bulk Configuration Data (CME client mode), to export the eNodeB data stored on the CME into the customized summary data file. Step 3 In the summary data file, set the parameters in the MOs according to the setting notes provided in section "Data Preparation" and close the file. Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Import Data > Import Base Station Bulk Configuration Data (CME client mode), to import the summary data file into the CME, and then start the data verification. Step 5 After data verification is complete, choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. For Issue 03 (2015-08-31)
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detailed operations, see Managing the CME > CME Guidelines > Script File Management > Exporting Incremental Scripts from a Planned Data Area in the CME online help. ----End
7.4.5.3 Using the CME to Perform Single Configuration On the CME, set the parameters listed in the "Data Preparation" section for a single eNodeB. The procedure is as follows: Step 1 In the planned data area, click Base Station in the upper left corner of the configuration window. Step 2 In area 1 shown in Figure 7-1, select the eNodeB to which the MOs belong. Figure 7-1 MO search and configuration window
Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL. Step 4 In area 3, double-click the MO in the Object Name column. All parameters in this MO are displayed in area 4. Step 5 Set the parameters in area 4 or 5. Step 6 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. ----End
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7.4.5.4 Using MML Commands MML Commands Step 1 Run the MOD CELLULCOMPALGO command to set a UL CoMP A3 offset. MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; NOTE
The default value is recommended.
Step 2 To activate 2-cell UL CoMP for LOFD-070222 Intra-eNodeB UL CoMP Phase II, run the MOD CELLALGOSWITCH command to turn on the UlJointReceptionSwitch and UlJointReceptionPhaseIISwitch for each cell involved. l
Macro-macro or micro-micro 2-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1;
l
Macro-micro 2-cell UL CoMP
To activate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to set the UlHetnetJointReceptionSwitch, UlHetnetCompOnUlRsrpSw, and UlHetnetCompManualNcellCfgSw for all macro and micro cells involved. When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0;
When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1;
To enable manual configuration of to-be measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on, run the MOD CELLALGOSWITCH command to turn on the corresponding switch and run the MOD EUTRANINTRAFREQNCELL command to set the relationships between intra-frequency macro and micro cells. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
Step 3 To activate 3-cell UL CoMP for LOFD-070222 Intra-eNodeB UL CoMP Phase II, run the MOD CELLALGOSWITCH command to turn on the UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, and UlJointReception3CellSwitch for each cell involved. l
Macro-macro or micro-micro 3-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1;
l
Macro-micro 3-cell UL CoMP
To activate macro-micro 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to set the UlHetnetJointReceptionSwitch, UlHetnetCompOnUlRsrpSw, and UlHetnetCompManualNcellCfgSw for all macro and micro cells involved. Issue 03 (2015-08-31)
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When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0;
When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualCoCellSw-1& UlHetnetCompOnUlRsrpSw-1;
To enable manual configuration of to-be measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on, run the MOD CELLALGOSWITCH command to turn on the corresponding switch and run the MOD EUTRANINTRAFREQNCELL command to set the relationships between intra-frequency macro and micro cells. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
Step 4 To activate 1R UL CoMP, run the MOD CELLALGOSWITCH command to turn on the Ul1R1RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
Step 5 To activate 1R+2R UL CoMP, run the MOD CELLALGOSWITCH command to turn on the Ul1R2RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
Step 6 If the license for LOFD-001012 UL Interference Rejection Combining has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the MrcIrcAdptSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
----End
MML Command Examples NOTE
The commands for activating UL CoMP need to be executed for each cell involved. The following uses the configuration of one cell as an example.
1.
Macro-macro or micro-micro 2-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
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2.
7 Engineering Guidelines for LOFD-070222 Intra-eNodeB UL CoMP Phase II
Macro-micro 2-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0;
//When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1;
//Enabling manual configuration of to-be-measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
3.
Macro-macro or micro-micro 3-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
4.
Macro-micro 3-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0;
//When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: Issue 03 (2015-08-31)
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MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0&UlHetnetCompOnUlRsrpSw-1;
//Enabling manual configuration of to-be-measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
7.4.6 Activation Observation 7.4.6.1 Using MML Commands Run the DSP CELLULCOMPCLUSTER command to query the coordinated cell list of one cell or the coordinated cell lists of all cells of the eNodeB. The command output contains the eNodeB IDs and local cell IDs of coordinated cells. If a coordinated cell list contains cells with the same eNodeB ID and established on different BBPs, the feature has been activated.
7.4.6.2 Using Signaling If all A3-based features except UL CoMP are disabled, you can use signaling for activation observation: Step 1 Enable a UE to access a cell. Search Figure 7-2 for the RRC_CONN_RECFG message. Double-click the message to see the UL CoMP A3 measurement configuration delivered by the eNodeB, as shown in Figure 7-3. If the A3 offset in the message is consistent with the UlCompA3Offset parameter value, LOFD-001066 Intra-eNodeB UL CoMP has been activated. Figure 7-2 Uu tracing results
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Figure 7-3 UL CoMP A3 offset
Step 2 Move the UE to the cell edge between intra-BBU inter-BBP cells. Alternatively, simulate the signal quality by adjusting an attenuator. The UE sends an event A3 measurement report to the eNodeB. LOFD-070222 Intra-eNodeB UL CoMP Phase II has been activated if the following conditions are met: (1) The eNodeB determines that the UE is at the cell edge based on the A3 report and selects this UE as a CoMP UE. (2) The eNodeB selects an inter-BBP cell with the strongest signal from the report as a coordinated cell. Figure 7-4 UL CoMP A3 measurement report
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Figure 7-5 UL CoMP A3 measurements
Step 3 Use the UE to perform uplink FTP services, and check the uplink throughput. If the uplink throughput is higher than that before feature activation, the feature takes effect as expected. ----End
7.4.6.3 Using Counters If there are UEs that meet the feature activation requirements, you can use the L.ChMeas.ULCoMPPhase2.PRB.Avg (ID: 1526733196) counter to check whether the feature has been activated. If the counter value is not 0, the feature has been activated.
7.4.7 Reconfiguration N/A
7.4.8 Deactivation 7.4.8.1 Using the CME to Perform Batch Configuration Batch reconfiguration using the CME is the recommended method to deactivate a feature on eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure for feature deactivation is similar to that for feature activation described in 7.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs. In the procedure, modify parameters according to the following table. Table 7-5 Parameter related to deactivation of this feature MO
Sheet in the Summary Data File
Parameter Group
Remarks
CELLALGOS WITCH
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, UlJRAntNumCombSw
User-defined sheet
7.4.8.2 Using the CME to Perform Single Configuration On the CME, set parameters according to 7.4.8.1 Using the CME to Perform Batch Configuration. For detailed instructions, see 7.4.5.3 Using the CME to Perform Single Configuration for feature activation. Issue 03 (2015-08-31)
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7.4.8.3 Using MML Commands MML Commands l
To deactivate 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlJointReception3CellSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
To deactivate the selection of coordinated cells based on UL RSRP for macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlHetnetCompOnUlRsrpSw switch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompOnUlRsrpSw-0;
l
To deactivate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlHetnetJointReceptionSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetJointReceptionSwitch-0;
l
To deactivate LOFD-070222 Intra-eNodeB UL CoMP Phase II, run the MOD CELLALGOSWITCH command to turn off UlJointReceptionPhaseIISwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionPhaseIISwitch-0;
l
To deactivate 1R UL CoMP, run the MOD CELLALGOSWITCH command to turn off the Ul1R1RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-0;
l
To deactivate 1R+2R UL CoMP, run the MOD CELLALGOSWITCH command to turn off the Ul1R2RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-0;
NOTICE After a feature is deactivated, no dependent features can take effect.
MML Command Examples NOTE
To deactivate one type of UL CoMP, the corresponding command needs to be executed for each cell involved. The following uses the configuration of one cell as an example.
l
Deactivating 3-cell UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
Deactivating the selection of coordinated cells based on UL RSRP for macro-micro UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompOnUlRsrpSw-0;
l
Deactivating macro-micro UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetJointReceptionSwitch-0;
l
Deactivating LOFD-070222 Intra-eNodeB UL CoMP Phase II MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionPhaseIISwitch-0;
l
Deactivating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-0;
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7 Engineering Guidelines for LOFD-070222 Intra-eNodeB UL CoMP Phase II
Deactivating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-0;
7.5 Performance Monitoring The monitoring method is the same as that for LOFD-001066 Intra-eNodeB UL CoMP.
7.6 Parameter Optimization Generating PCI Conflict Alarms PCI conflicts between intra-frequency neighboring cells have a negative impact on the performance of UL CoMP. You are advised to turn on the PCI conflict alarm switch so that PCI collision or confusion can be reported. The command for turning on the switch is as follows: MOD ENODEBALGOSWITCH: PciConflictAlmSwitch=ON;
Setting SRS Parameters for Macro-Micro UL CoMP If selection of coordinated cells based on UL RSRP is enabled for macro-micro UL CoMP, the SRS configuration procedure does not work. Without SRS configuration, a cell cannot perform such a selection. Therefore, manually setting SRS parameters is required in this case. To set SRS parameters, perform the following steps: Step 1 Run the MOD SRSCFG command to set SrsCfgInd to BOOLEAN_TRUE, FddSrsCfgMode to DEFAULTMODE, and SrsSubframeCfg based on the result of (PCI mod 3) +3. The following assumes that the PCI is 0. MOD SRSCFG: LocalCellId=0, SrsSubframeCfg=SC3,SrsCfgInd=BOOLEAN_TRUE, FddSrsCfgMode=DEFAULTMODE;
Step 2 Run the MOD CELLSRSADAPTIVECFG command to set SRS reporting period adaptation parameters. Set SrsPeriodAdaptive to OFF and UserSrsPeriodCfg to ms40. MOD CELLSRSADAPTIVECFG: LocalCellId=0, SrsPeriodAdaptive=OFF, UserSrsPeriod=ms40;
----End
Adjusting SRS Parameters for UL CoMP in SFN Scenarios SRS parameters are configured for SFN cells during cell setup. After SFN and UL CoMP are both enabled, the SRS configuration procedure does not work. If a neighboring cell of an SFN cell does not have SRS parameters configured, this neighboring cell cannot select the SFN cell for UL CoMP. If the neighboring cell has SRS parameters configured but it has the same start SRS subframe as the SFN cell or does not have uplink-downlink subframe configuration SC3, SC4, or SC5, the neighboring cell also cannot select the SFN cell for UL CoMP. Run the following command to check the SRS parameters of each cell: LST SRSCFG: LocalCellId=0;
If a neighboring cell of an SFN cell does not have SRS parameters configured, the SFN cell cannot select it for UL CoMP. Issue 03 (2015-08-31)
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If a neighboring cell of an SFN cell has SRS parameters configured and the FDDRESMODE.SfnCapabilityMode parameter is set to NORMAL, you can adjust the SRS parameters as follows: 1.
Run the MOD SRSCFG command to set SrsCfgInd to BOOLEAN_TRUE, FddSrsCfgMode to DEFAULTMODE, and SrsSubframeCfg based on the result of (PCI mod 3) +3. The following assumes that the PCI is 0. MOD SRSCFG: LocalCellId=0, SrsSubframeCfg=SC3,SrsCfgInd=BOOLEAN_TRUE, FddSrsCfgMode=DEFAULTMODE;
2.
Run the MOD CELLSRSADAPTIVECFG command to set SRS reporting period adaptation parameters. Set SrsPeriodAdaptive to OFF and UserSrsPeriodCfg to ms40. MOD CELLSRSADAPTIVECFG: LocalCellId=0,SrsPeriodAdaptive=OFF,UserSrsPeriod=ms40;
NOTICE l Changing the SRS configuration of an in-service cell would result in the automatic reset of the cell. l For the impact of SRS configuration on performance, see Physical Channel Resource Management Feature Parameter Description.
7.7 Troubleshooting Fault Description After UL CoMP is enabled, the uplink throughput of CEUs in a cell does not increase under the same conditions as before UL CoMP is enabled. After UL CoMP is enabled across the entire network, the values of counters L.ULCoMP.User.Avg (ID: 1526728338), L.ULCoMP.User.Max (ID: 1526728339), and L.ULCoMP.RB (ID: 1526728340) of some or all cells remain 0.
Fault Handling Step 1 Check related alarms, for example, an alarm that indicates the capacity of a cell decreases. If there is such an alarm, handle the alarm according to the instructions in eNodeB Alarm Reference. If there is not such alarm, go to Step 2. Step 2 Run the LST CELLALGOSWITCH command to check the UL CoMP switch settings. If the UlJointReceptionSwitch or UlJointReceptionPhaseIISwitch is turned off, turn it one and end the troubleshooting. If both are turned on, go to Step 3. Step 3 Run the DSP LICINFO command to check the Actual Used values of Intra-eNodeB UL CoMP(FDD) and Intra-eNodeB UL CoMP Phase II(FDD). l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is 0, go to Step 4 and Step 5.
l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) or Intra-eNodeB UL CoMP Phase II(FDD) is not 0, go to Step 6 and Step 7.
Step 4 Modify eNodeB configurations if they do not meet the UL CoMP deployment requirements. Issue 03 (2015-08-31)
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Step 5 Check whether the cells are configured with mutually exclusive features described in 4.3 Features Related to LOFD-070222 Intra-eNodeB UL CoMP Phase II. If yes, end the troubleshooting. Otherwise, go to Step 8. Step 6 Run the DSP CELLULCOMPCLUSTER command to check the coordinated cell list. If there are coordinated cells, go to Step 7. Otherwise, go to Step 8. Step 7 Check whether the cells selected for UL CoMP meet the requirements for the operating environment. If the cells do not, end the troubleshooting. If the cells do, go to Step 8. Step 8 Contact Huawei technical support. ----End
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8
8 Engineering Guidelines for LOFD-070223 UL CoMP based on Coordinated BBU
Engineering Guidelines for LOFD-070223 UL CoMP based on Coordinated BBU
8.1 When to Use LOFD-070223 UL CoMP based on Coordinated BBU When the inter-RRU distance is not greater than 1000 m in urban areas, UL CoMP based on coordinated BBU is recommended because this feature effectively increases the average uplink throughput for inter-BBU cells and CEUs. l
In suburban, rural, and other areas where the inter-RRU distance is large, this feature is not recommended.
l
You are advised to optimize parameter settings by referring to the "Parameter Optimization" section to reduce the impact of signaling processing for event A3 measurement reporting in one of the following situations: –
The uplink or downlink PRB usage is greater than 90%.
–
The control channel element (CCE) usage is greater than 80%.
–
The central processing unit (CPU) usage is greater than 80%.
l
If there is intermodulation interference, solve this problem before using this feature.
l
If the difference in cell-specific reference signal (CRS) transmit power between macro and micro cells is greater than or equal to 6 dB, it is recommended that macro-micro UL CoMP based on SRS measurement be used.
l
When both SFN and UL CoMP are enabled, the start SRS subframe of the SFN cell must be different from those of its neighboring cells (common or SFN cells). The eNodeB can select a neighboring SFN cell to serve as a coordinated cell for a UE only when the UE is allocated SRS resource in the start SRS subframe.
8.2 Required Information See "Requirements."
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NOTE
This feature shares system resources with SFN, CA, and CSPC. Before deploying this feature, contact Huawei engineers for resource audit.
8.3 Planning RF Planning N/A
Network Planning UL CoMP can be performed in cells in the same connection set only when UL CoMP based on coordinated BBU is enabled. If a BBU3900 is used, an intra-BBU connection set must contain at least one LBBPd or UBBPd installed in slot 2 or 3. If a BBU3910 is used, there is no restriction on an intra-BBU connection set. If a USU3900 is used, an inter-BBU connection set can contain only cells established on the BBPs with the same slot number. For example, cells established on the BBP in slot 0 of BBU 0 and those established on the BBP in slot 0 of BBU 1 can compose an inter-BBU connection set. If a USU3910 is used, an inter-BBU connection set can contain cells established on the BBPs with different slot numbers. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP and configured with baseband equipment. Geographically adjacent intra-frequency cells should be established on the same BBP or the BBPs whose cells compose a connection set and be bound to baseband equipment. This feature is based on multi-BBU interconnection. For details, see USU3900-based MultiBBU Interconnection Feature Parameter Description and USU3910-based Multi-BBU Interconnection Feature Parameter Description. NOTE
When the BBP is restarted or reset, the cells are reestablished. The deployment information for these cells may change and the coordinated cell lists may also change. These changes will affect the performance of UL CoMP.
Hardware Planning For details about the requirements for BBP models, see the "Requirements" section.
8.4 Deployment 8.4.1 Requirements Operating Environment LOFD-070223 UL CoMP Based on Coordinated BBU requires the following features: Issue 03 (2015-08-31)
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l
LOFD-001066 Intra-eNodeB UL CoMP
l
LOFD-070222 Intra-eNodeB UL CoMP Phase II.
LOFD-070223 UL CoMP Based on Coordinated BBU takes effect only when this feature and all its prerequisite features are enabled. The following table describes the requirements for the operating environment. Table 8-1 Requirements for the operating environment Information to Be Collected
Requirements
Networking
Multi-BBU interconnection
eNodeB type
Macro eNodeBs
RRU model
Macro-micro and micro-micro UL CoMP allows micro cells to be LPNs, for example, RRU3220E.
BBP model
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, or UBBPd6
Number of cells
UL CoMP requires at least two intra-frequency cells in a connection set. If UL CoMP is enabled in only one cell, it will not take effect.
Cell configuration
l UL CoMP can be performed in inter-BBU inter-BBP cells. The serving cell and coordinated cells must be configured in the same connection set. For details, see 8.3 Planning. l Inter-BBU cells that are geographically adjacent must be configured as intra-frequency neighboring cells with different PCIs. l The cells involved in UL CoMP must have the same frequency, bandwidth, and CP type. These cells can be all in 1R, 2R, or 4R mode; or some in 1R mode and the others in 2R mode. l An LBBPd2, LBBPd3, UBBPd4, or UBBPd5 can be used to support three 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd3 can be used to support six 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l A UBBPd3 can be used to support three 2R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l A UBBPd5 or UBBPd6 can be used to support six 2R or 4R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l The cells can be set up on different models of LBBP, UBBP, or both. l An LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, or UBBPd6 can be used to support 1R or 1R+2R UL CoMP. l To support inter-BBU UL CoMP, the Cell.eNodeBId parameter values of inter-BBU cells cannot be the same. NOTE 4R UL CoMP can be performed in only two cells. It requires that the UE be a type-1 UE, the modulation scheme be QPSK or 16QAM, and the networking mode be any Cloud BB mode other than distributed Cloud BB.
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Information to Be Collected
Requirements
Inter-RRU distance
It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m.
NOTE
The CellAlgoSwitch.UlJRAntNumCombSw parameter settings of the serving cell and coordinated cells must be matched. For example, to enable 1R+2R UL CoMP, turn on the Ul1R2RJRSwitch for both 1R and 2R cells. Note that 2R UL CoMP and 4R UL CoMP are supported by default, without additional parameter settings.
Transmission Networking Time synchronization with a deviation less than 1.5 μs must be achieved between BBUs. (You can use a a GPS clock to implement time synchronization. For details, see Synchronization Feature Parameter Description.) When clock quality does not meet the requirement, LOFD-070223 UL CoMP Based on Coordinated BBU is automatically disabled. When clock quality meets the requirement, this feature is automatically enabled. LOFD-070223 UL CoMP Based on Coordinated BBU requires that inter-BBU routes be planned. If BBUs are to be connected through USU3910, eX2 interfaces must be configured between BBUs. For details, see eX2 Self-Management Feature Parameter Description.
License The operator has purchased and activated the license for the feature listed in the following table. Feature ID
Feature Name
Model
License Control Item
NE
Sales Unit
LOFD-07 0223
UL CoMP based on Coordinated BBU
LT1SULC BCB00
UL CoMP based on Coordinated BBU(FDD)
eNode B
per eNodeB
The number of eNodeBs that can use LOFD-070223 UL CoMP Based on Coordinated BBU is subject to the licensed number. If the number of eNodeBs is greater than the licensed number, only the licensed number of eNodeBs can use this feature. To deploy LOFD-070223 UL CoMP Based on Coordinated BBU, the licenses for LOFD-001066 Intra-eNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II must be purchased and activated.
Other Features For details, see 4.4 Features Related to LOFD-070223 UL CoMP based on Coordinated BBU. Issue 03 (2015-08-31)
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8.4.2 Data Preparation This section describes the data that you need to collect for setting parameters. Required data is data that you must collect for all scenarios. Collect scenario-specific data when necessary for a specific feature deployment scenario. There are three types of data sources: l
Network plan (negotiation not required): parameter values planned and set by the operator
l
Network plan (negotiation required): parameter values planned by the operator and negotiated with the EPC or peer transmission equipment
l
User-defined: parameter values set by users
Required Data The following table describes the parameters that must be set in a BaseBandEqm MO to configure baseband equipment information. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP, and intra-frequency cells that are geographically adjacent but served by RRUs installed on different poles or towers be configured in the same connection set. For details, see 8.3 Planning. Table 8-2 Parameters related to baseband equipment
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Parameter Name
Parameter ID
Data Source
Setting Notes
Baseband Equipment ID
BASEBANDEQM.B ASEBANDEQMID
Network plan (negotiation not required)
None
Baseband Equipment Type
BASEBANDEQM.B ASEBANDEQMTYP E
Network plan (negotiation not required)
Set this parameter to ULDL.
UMTS UL Demodulation Mode
BASEBANDEQM.U MTSDEMMODE
Network plan (negotiation not required)
Set this parameter to NULL.
Cabinet No. of Process Unit n
CNn
Network plan (negotiation not required)
n indicates the cabinet number of the BBP, ranging from 0 to 7.
Subrack No. of Process Unit n
SRNn
Network plan (negotiation not required)
n indicates the subrack number of the BBP, ranging from 0 to 1.
Slot No. of Process Unit n
SNn
Network plan (negotiation not required)
n indicates the slot number of the BBP, ranging from 0 to 5.
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The following table describes the parameters that must be set in an eUCellSectorEqm MO to configure a set of sector equipment for a cell. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP. Table 8-3 Parameters related to sector equipment for a cell Parameter Name
Parameter ID
Data Source
Setting Notes
Local cell ID
eUCellSectorEqm. LocalCellId
Network plan (negotiation not required)
None
Sector equipment ID
eUCellSectorEqm. SectorEqmId
Network plan (negotiation not required)
None
Reference signal power
eUCellSectorEqm. ReferenceSignalPw r
Network plan (negotiation not required)
None
Baseband equipment ID
eUCellSectorEqm. BaseBandEqmId
Network plan (negotiation not required)
None
Scenario-specific Data In addition to required data, scenario-specific data also needs to be configured. 1.
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The following table describes the parameters that must be set in the CellAlgoSwitch and ENodeBAlgoSwitch MOs to configure UL CoMP based on coordinated BBU.
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Paramete r Name
Parameter ID
Data Source
Setting Notes
UplinkCo mpSwitch
CellAlgoSwi tch.UplinkC ompSwitch
Network plan (negotiation not required)
This parameter specifies whether to enable UL CoMP for a cell. Default value: l UlJointReceptionSwitch:Off l UlJointReceptionPhaseIISwitch:Off l UlJointReception3CellSwitch:Off Recommended value: l UlJointReceptionSwitch:On l UlJointReceptionPhaseIISwitch:On l UlJointReception3CellSwitch:On Additional setting notes for macro-micro scenarios: Default value: l UlHetnetJointReceptionSwitch:Off l UlHetnetCompManualCoCellSw:Off l UlHetnetCompOnUlRsrpSw:Off Recommended value: l UlHetnetJointReceptionSwitch:On l UlHetnetCompManualCoCellSw:Off l UlHetnetCompOnUlRsrpSw:On (when the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell)
OverBBU sSwitch
ENODEBA LGOSWIT CH.OverBB UsSwitch
Network plan (negotiation not required)
This parameter specifies whether to enable UL CoMP based on coordinated BBU. Inter-BBU UL CoMP is enabled when UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, and UlJointReceptionOverBBUsSwitch are all turned on. Default value: UlJointReceptionOverBBUsSwitch:Off Recommended value: UlJointReceptionOverBBUsSwitch:On
2.
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The following table describes the parameter that must be set in the CellAlgoSwitch MO to configure an IRC switch.
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Paramete r Name
Parameter ID
Data Source
Setting Notes
PUSCH IRC algorithm switch
CellAlgoSwi tch.PuschIrc AlgoSwitch
Network plan (negotiation not required)
This parameter specifies a PUSCH IRC algorithm. The MrcIrcAdptSwitch option specifies whether to enable adaptive switching between MRC and IRC: l Default value: MrcIrcAdptSwitch:On l Recommended value: MrcIrcAdptSwitch:On
3.
The following table describes the parameter that must be set in a CellUlCompAlgo MO to configure a UL CoMP A3 offset. Parameter Name
Parameter ID
Data Source
Setting Notes
UlCompA3 Offset
CellUlCom pAlgo.UlCo mpA3Offset
Network plan (negotiation not required)
This parameter specifies a UL CoMP A3 offset. The value range is from -30 to +30, with a unit of 0.5 dB. Default value: -20. Recommended value: -20
4.
The following table describes the parameter that must be set in a CellAlgoSwitch MO to configure a combination of cell RX modes. Parameter Name
Parameter ID
Data Source
Setting Notes
UL JR Antenna Number Combined Switch
CellAlgoSw itch.UlJRA ntNumCom bSw
Network plan (negotiation not required)
This parameter specifies a combination of receive modes for UL CoMP. Default value: l Ul1R1RJRSwitch:Off l Ul1R2RJRSwitch:Off Recommended value: l Ul1R1RJRSwitch:Off l Ul1R2RJRSwitch:Off
NOTE
2R UL CoMP and 4R UL CoMP are supported by default after the UL CoMP switch is turned on.
8.4.3 Precautions It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP, and intra-frequency cells that are Issue 03 (2015-08-31)
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geographically adjacent but served by RRUs installed on different poles or towers be configured in the same connection set. For details, see 8.3 Planning.
8.4.4 Hardware Adjustment It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m. For details about USU installation, see USU3900 Installation Guide and USU3910 Installation Guide.
8.4.5 Activation 8.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs Enter the values of the parameters listed in the following table in a summary data file, which also contains other data for the new eNodeBs to be deployed. Then, import the summary data file into the CME for batch configuration. For detailed instructions, see "Creating eNodeBs in Batches" in the initial configuration guide for the eNodeB, which is available in the eNodeB product documentation. The summary data file may be a scenario-specific file provided by the CME or a customized file, depending on the following conditions: l
The MOs in the following table are contained in a scenario-specific summary data file. In this situation, set the parameters in the MOs, and then verify and save the file.
l
Some MOs in the following table are not contained in a scenario-specific summary data file. In this situation, customize a summary data file to include the MOs before you can set the parameters. Table 8-4 Parameters related to activation of this feature MO
Sheet in the Summary Data File
Parameter Group
Remarks
CellUlCompAl go
eNodeB Radio Data
LocalCellId, UlCompA3Offset
CellAlgoSwitc h
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, PuschIrcAlgoSwitch, UlJRAntNumCombSw
For parameter setting notes, see 8.4.2 Data Preparation.
ENodeBAlgoS witch
eNodeB Radio Data
OverBBUsSwitch
8.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs Batch reconfiguration using the CME is the recommended method to activate a feature on existing eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure is as follows: Issue 03 (2015-08-31)
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Step 1 Customize a summary data file with the MOs and parameters listed in section "Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs." For online help, press F1 when a CME window is active, and select Managing the CME > CME Guidelines > LTE Application Management > eNodeB Related Operations > Customizing a Summary Data File for Batch eNodeB Configuration. Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Export Data > Export Base Station Bulk Configuration Data (CME client mode), to export the eNodeB data stored on the CME into the customized summary data file. Step 3 In the summary data file, set the parameters in the MOs according to the setting notes provided in section "Data Preparation" and close the file. Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Import Data > Import Base Station Bulk Configuration Data (CME client mode), to import the summary data file into the CME, and then start the data verification. Step 5 After data verification is complete, choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. For detailed operations, see Managing the CME > CME Guidelines > Script File Management > Exporting Incremental Scripts from a Planned Data Area in the CME online help. ----End
8.4.5.3 Using the CME to Perform Single Configuration On the CME, set the parameters listed in the "Data Preparation" section for a single eNodeB. The procedure is as follows: Step 1 In the planned data area, click Base Station in the upper left corner of the configuration window. Step 2 In area 1 shown in Figure 8-1, select the eNodeB to which the MOs belong.
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Figure 8-1 MO search and configuration window
Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL. Step 4 In area 3, double-click the MO in the Object Name column. All parameters in this MO are displayed in area 4. Step 5 Set the parameters in area 4 or 5. Step 6 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. ----End
8.4.5.4 Using MML Commands MML Commands Step 1 Run the MOD CELLULCOMPALGO command to set a UL CoMP A3 offset. MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; NOTE
The default value is recommended.
Step 2 To activate inter-BBU 2-cell UL CoMP for LOFD-070223 UL CoMP Based on Coordinated BBU, run the MOD CELLALGOSWITCH command to turn on the UIJointReceptionSwitch and UlJointReceptionPhaseIISwitch, and then run the MOD ENODEBALGOSWITCH command to turn on the UlJointReceptionOverBBUsSwitch for each cell involved. l Issue 03 (2015-08-31)
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MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
l
Macro-micro 2-cell UL CoMP
To activate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to set the UlHetnetJointReceptionSwitch, UlHetnetCompOnUlRsrpSw, and UlHetnetCompManualNcellCfgSw for all macro and micro cells involved. When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
To enable manual configuration of to-be measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on, run the MOD CELLALGOSWITCH command to turn on the corresponding switch and run the MOD EUTRANINTRAFREQNCELL command to set the relationships between intra-frequency macro and micro cells. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
Step 3 To activate inter-BBU 3-cell UL CoMP for LOFD-070223 UL CoMP Based on Coordinated BBU, run the MOD CELLALGOSWITCH command to turn on the UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, and UlJointReception3CellSwitch. Then, run the MOD ENODEBALGOSWITCH command to turn on the UlJointReceptionOverBBUsSwitch for each cell involved. l
Macro-macro or micro-micro 3-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
l
Macro-micro 3-cell UL CoMP
To activate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to set the UlHetnetJointReceptionSwitch, UlHetnetCompOnUlRsrpSw, and UlHetnetCompManualNcellCfgSw for all macro and micro cells involved. When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: Issue 03 (2015-08-31)
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MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0&UlHetnetCompOnUlRsrpSw-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
To enable manual configuration of to-be measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on, run the MOD CELLALGOSWITCH command to turn on the corresponding switch and run the MOD EUTRANINTRAFREQNCELL command to set the relationships between intra-frequency macro and micro cells. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
Step 4 To activate 1R UL CoMP, run the MOD CELLALGOSWITCH command to turn on the Ul1R1RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
Step 5 To activate 1R+2R UL CoMP, run the MOD CELLALGOSWITCH command to turn on the Ul1R2RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
Step 6 If the license for LOFD-001012 UL Interference Rejection Combining has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the MrcIrcAdptSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
----End
MML Command Examples NOTE
The commands for activating UL CoMP need to be executed for each cell involved. The following uses the configuration of one cell as an example.
1.
Macro-macro or micro-micro 2-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
2.
Macro-micro 2-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet
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JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlHetnet JointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw-0&UlHetnetCompOnUlRsrpSw-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
//Enabling manual configuration of to-be-measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
3.
Macro-macro or micro-micro 3-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
4.
Macro-micro 3-cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3Offset=-20; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is less than 6 dB or the micro cell is an SFN cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
//When the difference in CRS transmit power between macro and micro cells is greater than or equal to 6 dB and the micro cell is a common cell, run the following command: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1&UlHetnetJointReceptionSwitch-1&UlHetnetCompManualNcellCfgSw0&UlHetnetCompOnUlRsrpSw-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-1;
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//Enabling manual configuration of to-be-measured neighboring cells in macro-micro scenarios when the UlHetnetCompOnUlRsrpSw switch is on MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompManualNcellCfgSw-1; MOD EUTRANINTRAFREQNCELL: LocalCellId=0, Mcc="510", Mnc="990", eNodeBId=20043, CellId=2, AttachCellSwitch=ON;
//Activating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-1;
//Activating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-1;
8.4.6 Activation Observation 8.4.6.1 Using MML Commands Run the DSP CELLULCOMPCLUSTER command to query the coordinated cell list of one cell or the coordinated cell lists of all cells of the eNodeB. The command output contains the eNodeB IDs and local cell IDs of coordinated cells. If a coordinated cell list contains cells with different eNodeB IDs, the feature has been activated.
8.4.6.2 Using Signaling If all A3-based features except UL CoMP are disabled, you can use signaling for activation observation: Step 1 Enable a UE to access a cell. Search Figure 8-2 for the RRC_CONN_RECFG message. Double-click the message to see the UL CoMP A3 measurement configuration delivered by the eNodeB, as shown in Figure 8-3. If the A3 offset in the message is consistent with the CellUlCompAlgo.UlCompA3Offset parameter value, LOFD-001066 Intra-eNodeB UL CoMP has been activated. Figure 8-2 Uu tracing results
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Figure 8-3 UL CoMP A3 offset
Step 2 Move the UE to the edge between inter-BBU cells, or adjust the attenuator to simulate the cell edge signal quality. Check the A3 measurement report sent by the UE to the eNodeB. LOFD-070223 Intra-eNodeB UL CoMP Phase II has been activated if the following conditions are met: (1) The eNodeB determines that the UE is at the cell edge based on the A3 measurement report and selects this UE as a CoMP UE. (2) The eNodeB selects an inter-BBU cell with the strongest signal as a coordinated cell. Figure 8-4 UL CoMP A3 measurement report
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Figure 8-5 UL CoMP A3 measurements
Step 3 Use the UE to perform uplink FTP services, and check the uplink throughput. If the uplink throughput is higher than that before feature activation, the feature takes effect as expected. ----End
8.4.6.3 Using Counters If there are UEs that meet the feature activation requirements, you can use the L.ChMeas.ULOverBBUCoMP.PRB.Avg (ID: 1526733197) counter to check whether the feature has been activated. If the counter value is not 0, the feature has been activated.
8.4.7 Reconfiguration N/A
8.4.8 Deactivation 8.4.8.1 Using the CME to Perform Batch Configuration Batch reconfiguration using the CME is the recommended method to deactivate a feature on eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure for feature deactivation is similar to that for feature activation described in 8.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs. In the procedure, modify parameters according to the following table. Table 8-5 Parameters related to deactivation of LOFD-070223 UL CoMP based on Coordinated BBU
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MO
Sheet in the Summary Data File
Parameter Group
Remarks
CELLALGOS WITCH
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, UlJRAntNumCombSw
User-defined sheet
ENODEBALG OSWITCH
eNodeB Radio Data
OverBBUsSwitch
User-defined sheet
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8.4.8.2 Using the CME to Perform Single Configuration On the CME, set parameters according to 8.4.8.1 Using the CME to Perform Batch Configuration. For detailed instructions, see 8.4.5.3 Using the CME to Perform Single Configuration for feature activation.
8.4.8.3 Using MML Commands MML Commands l
To deactivate 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlJointReception3CellSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
To deactivate the selection of coordinated cells based on UL RSRP for macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlHetnetCompOnUlRsrpSw switch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompOnUlRsrpSw-0;
l
To deactivate macro-micro UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlHetnetJointReceptionSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetJointReceptionSwitch-0;
l
To deactivate LOFD-070223 UL CoMP Based on Coordinated BBU, run the MOD ENODEBALGOSWITCH command to turn off the UlJointReceptionOverBBUsSwitch for each eNodeB involved. MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-0;
l
To deactivate 1R UL CoMP, run the MOD CELLALGOSWITCH command to turn off the Ul1R1RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-0;
l
To deactivate 1R+2R UL CoMP, run the MOD CELLALGOSWITCH command to turn off the Ul1R2RJRSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-0;
MML Command Examples NOTE
To deactivate one type of UL CoMP, the corresponding command needs to be executed for each cell involved. The following uses the configuration of one cell as an example.
l
Deactivating 3-cell UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
Deactivating the selection of coordinated cells based on UL RSRP for macro-micro UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetCompOnUlRsrpSw-0;
l
Deactivating macro-micro UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlHetnetJointReceptionSwitch-0;
l
Deactivating 1R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R1RJRSwitch-0;
l
Deactivating 1R+2R UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UlJRAntNumCombSw=Ul1R2RJRSwitch-0;
l
Deactivating LOFD-070223 UL CoMP Based on Coordinated BBU MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJointReceptionOverBBUsSwitch-0;
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8.5 Performance Monitoring The monitoring method is the same as that for LOFD-001066 Intra-eNodeB UL CoMP.
8.6 Parameter Optimization Generating PCI Conflict Alarms PCI conflicts between intra-frequency neighboring cells have a negative impact on the performance of UL CoMP. You are advised to turn on the PCI conflict alarm switch so that PCI collision or confusion can be reported. The command for turning on the switch is as follows: MOD ENODEBALGOSWITCH: PciConflictAlmSwitch=ON;
Setting SRS Parameters for Macro-Micro UL CoMP If selection of coordinated cells based on UL RSRP is enabled for macro-micro UL CoMP, the SRS configuration procedure does not work. Without SRS configuration, a cell cannot perform such a selection. Therefore, manually setting SRS parameters is required in this case. To set SRS parameters, perform the following steps: Step 1 Run the MOD SRSCFG command to set SrsCfgInd to BOOLEAN_TRUE, FddSrsCfgMode to DEFAULTMODE, and SrsSubframeCfg based on the result of (PCI mod 3) +3. The following assumes that the PCI is 0. MOD SRSCFG: LocalCellId=0, SrsSubframeCfg=SC3,SrsCfgInd=BOOLEAN_TRUE, FddSrsCfgMode=DEFAULTMODE;
Step 2 Run the MOD CELLSRSADAPTIVECFG command to set SRS reporting period adaptation parameters. Set SrsPeriodAdaptive to OFF and UserSrsPeriodCfg to ms40. MOD CELLSRSADAPTIVECFG: LocalCellId=0, SrsPeriodAdaptive=OFF, UserSrsPeriod=ms40;
----End
Adjusting SRS Parameters for UL CoMP in SFN Scenarios SRS parameters are configured for SFN cells during cell setup. After SFN and UL CoMP are both enabled, the SRS configuration procedure does not work. If a neighboring cell of an SFN cell does not have SRS parameters configured, this neighboring cell cannot select the SFN cell for UL CoMP. If the neighboring cell has SRS parameters configured but it has the same start SRS subframe as the SFN cell or does not have uplink-downlink subframe configuration SC3, SC4, or SC5, the neighboring cell also cannot select the SFN cell for UL CoMP. Run the following command to check the SRS parameters of each cell: LST SRSCFG: LocalCellId=0;
If a neighboring cell of an SFN cell does not have SRS parameters configured, the SFN cell cannot select it for UL CoMP. Issue 03 (2015-08-31)
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If a neighboring cell of an SFN cell has SRS parameters configured and the FDDRESMODE.SfnCapabilityMode parameter is set to NORMAL, you can adjust the SRS parameters as follows: 1.
Run the MOD SRSCFG command to set SrsCfgInd to BOOLEAN_TRUE, FddSrsCfgMode to DEFAULTMODE, and SrsSubframeCfg based on the result of (PCI mod 3) +3. The following assumes that the PCI is 0. MOD SRSCFG: LocalCellId=0, SrsSubframeCfg=SC3,SrsCfgInd=BOOLEAN_TRUE, FddSrsCfgMode=DEFAULTMODE;
2.
Run the MOD CELLSRSADAPTIVECFG command to set SRS reporting period adaptation parameters. Set SrsPeriodAdaptive to OFF and UserSrsPeriodCfg to ms40. MOD CELLSRSADAPTIVECFG: LocalCellId=0,SrsPeriodAdaptive=OFF,UserSrsPeriod=ms40;
NOTICE l Changing the SRS configuration of an in-service cell would result in the automatic reset of the cell. l For the impact of SRS configuration on performance, see Physical Channel Resource Management Feature Parameter Description.
8.7 Troubleshooting Fault Description After UL CoMP based on coordinated BBU is enabled, the uplink throughput of CEUs in a cell does not increase under the same conditions as before this feature is enabled. After UL CoMP based on coordinated BBU is enabled in the whole network, the values of the counters L.ULCoMP.User.Avg (ID: 1526728338), L.ULCoMP.User.Max (ID: 1526728339), and L.ULCoMP.RB (ID: 1526728340) of some or all cells remain 0.
Fault Handling Step 1 Check whether there are alarms such as those related to cell capability decrease or BBU interconnection. If there is such an alarm, handle the alarm according to the instructions in eNodeB Alarm Reference. If there is not such alarm, go to Step 2. Step 2 Run the LST CELLALGOSWITCH and LST ENODEBALGOSWITCH commands to check the UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, and UlJointReceptionOverBBUsSwitch settings. If any switch is turned off, turn it on and end the troubleshooting. If all switches are turned on, go to Step 3. Step 3 Run the DSP LICINFO command to check the Actual Used values of licenses IntraeNodeB UL CoMP(FDD), Intra-eNodeB UL CoMP Phase II(FDD), and UL CoMP based on Coordinated BBU(FDD). l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is 0, go to Step 4 and Step 5.
l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is not 0:
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–
If the Actual Used value of neither Intra-eNodeB UL CoMP Phase II(FDD) nor UL CoMP based on Coordinated BBU(FDD) is 0, go to Step 6 and Step 7.
–
If the Actual Used value of Intra-eNodeB UL CoMP Phase II(FDD) or UL CoMP based on Coordinated BBU(FDD) is 0, go to Step 8.
Step 4 Modify eNodeB configurations if they do not meet the UL CoMP deployment requirements. Step 5 Check whether the cells are configured with mutually exclusive features described in 4.4 Features Related to LOFD-070223 UL CoMP based on Coordinated BBU. If yes, end the troubleshooting. Otherwise, go to Step 8. Step 6 Run the DSP CELLULCOMPCLUSTER command to check the coordinated cell list. If there are coordinated cells, go to Step 7. Otherwise, go to Step 8. Step 7 Check whether the cells selected for UL CoMP meet the requirements for the operating environment. If the cells do not, end the troubleshooting. If the cells do, go to Step 8. Step 8 Contact Huawei technical support. ----End
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9
9 Engineering Guidelines for LOFD-081219 UL CoMP Based on Relaxed Backhaul
Engineering Guidelines for LOFD-081219 UL CoMP Based on Relaxed Backhaul
9.1 When to Use LOFD-081219 UL CoMP Based on Relaxed Backhaul When the inter-RRU distance is less than 1000 m in urban areas, LOFD-081219 UL CoMP Based on Relaxed Backhaul is recommended because it can increase the average uplink throughput for cells and CEUs in the TTI bundling state. In suburban, rural, and other areas where the inter-RRU distance is large, this feature is not recommended. You are advised to optimize parameter settings by referring to "Parameter Optimization" in "Engineering Guidelines for LOFD-001066 Intra-eNodeB UL CoMP" to reduce the impact of signaling overhead in event A3 measurement reporting in one of the following situations: l
The uplink or downlink PRB usage is greater than 90%.
l
The CCE usage is greater than 80%.
l
The CPU usage is greater than 80%.
If there is intermodulation interference, solve this problem before using this feature.
9.2 Required Information For details, see 9.4.1 Requirements. NOTE
This feature shares system resources with SFN, CA, and CSPC. Before deploying this feature, contact Huawei engineers for resource audit.
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9.3 Planning RF Planning N/A
Network Planning When LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled, UL CoMP can be performed in cells in the same connection set. If a BBU3900 is used, an intra-BBU connection set must contain at least one LBBPd or UBBPd installed in slot 2 or 3. If a BBU3910 is used, there is no restriction on an intra-BBU connection set. For intra-frequency cells covered by antennas installed on the same pole or tower, it is recommended that these cells be set up on the same BBP and bound to baseband equipment. Geographically adjacent intra-frequency cells should be established on the same BBP or the BBPs whose cells compose a connection set and be bound to baseband equipment. NOTE
When the BBP is restarted or reset, the cells are reestablished. The deployment information for these cells may change and the coordinated cell lists may also change. These changes will affect the performance of UL CoMP.
Hardware Planning For the requirements of LOFD-081219 UL CoMP Based on Relaxed Backhaul for BBP models in different scenarios, see Table 2-7.
9.4 Deployment 9.4.1 Requirements Operating Environment LOFD-081219 UL CoMP Based on Relaxed Backhaul requires the following features: l
LOFD-001066 Intra-eNodeB UL CoMP
l
LOFD-070222 Intra-eNodeB UL CoMP Phase II
l
LOFD-001048 TTI Bundling
LOFD-081219 UL CoMP Based on Relaxed Backhaul takes effect only when this feature and all its prerequisite features are enabled. The following table describes the requirements for the operating environment.
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Table 9-1 Requirements for the operating environment Information to Be Collected
Requirements
Networking
Relaxed backhaul
eNodeB type
Macro eNodeBs
RRU model
None
BBP model
LBBPd2, LBBPd3, UBBPd3, UBBPd4, UBBPd5, or UBBPd6
Number of cells
UL CoMP requires at least two intra-frequency cells in a connection set. If UL CoMP is enabled in only one cell, it will not take effect.
Cell configuration
l UL CoMP can be performed in inter-BBU inter-BBP cells. The serving cell and coordinated cells must be in the same connection set for UL CoMP. l Inter-BBU cells that are geographically adjacent must be configured as intra-frequency neighboring cells with different PCIs. l The cells involved in UL CoMP must have the same frequency, bandwidth, CP type, and receive mode (2R). l If a UBBPd3 or UBBPd4 is used to support GSM+LTE or UMTS +LTE, UL CoMP based on relaxed backhaul cannot be implemented. l An LBBPd2, UBBPd3, or UBBPd4 can be used to support three 2R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l An LBBPd3, UBBPd5, or UBBPd6 can be used to support six 2R cells each with a bandwidth of 20, 15, 10, 5, 3, or 1.4 MHz. l The cells can be set up on different models of LBBP, UBBP, or both. l To support inter-BBU UL CoMP, the Cell.eNodeBId parameter values of inter-BBU cells cannot be the same. NOTE This feature requires that the modulation scheme be QPSK or 16QAM.
Inter-RRU distance
It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m.
Transmission Networking Time synchronization with a deviation less than 1.5 μs must be achieved between BBUs. (You can use a GPS clock to implement time synchronization. For details, see Synchronization Feature Parameter Description.) When clock quality does not meet the requirement, LOFD-081219 UL CoMP Based on Relaxed Backhaul is automatically disabled. When clock quality meets the requirement, this feature is automatically enabled. This feature requires that inter-BBU routes be planned in advance to ensure connectivity of the routes. In addition, it requires that eX2 interfaces be used between BBUs. For details, see eX2 Self-Management Feature Parameter Description. One-way transmission delays between BBUs must be less than 4 ms. For details, see IP Performance Monitor Feature Parameter Description. You can use the VS.IPPM.Rtt.Means Issue 03 (2015-08-31)
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counter (ID: 1542455420) to obtain the average RTT on IP performance monitoring and further obtain the average one-way transmission delay between BBUs. The eNodeB periodically measures one-way transmission delays between the serving cell and neighboring cells connected through a relaxed backhaul network. If a delay is greater than or equal to 4 ms, the eNodeB disables UL CoMP between the serving cell and the corresponding neighboring cell.
License The operator has purchased and activated the license for the feature listed in the following table. Feature ID
Feature Name
Model
License Control Item
NE
Sales Unit
LOFD-081219
UL CoMP Based on Relaxed Backhaul
LT1SUL CBRB00
UL CoMP Based on Relaxed Backhaul(FDD)
eNodeB
per eNodeB
To deploy LOFD-081219 UL CoMP Based on Relaxed Backhaul, the licenses for LOFD-001066 Intra-eNodeB UL CoMP and LOFD-070222 Intra-eNodeB UL CoMP Phase II must be purchased and activated.
Other Features For details, see 4.5 Features Related to LOFD-081219 UL CoMP Based on Relaxed Backhaul.
9.4.2 Data Preparation This section describes the data that you need to collect for setting parameters. Required data is data that you must collect for all scenarios. Collect scenario-specific data when necessary for a specific feature deployment scenario. There are three types of data sources: l
Network plan (negotiation not required): parameter values planned and set by the operator
l
Network plan (negotiation required): parameter values planned by the operator and negotiated with the EPC or peer transmission equipment
l
User-defined: parameter values set by users
Required Data The following table describes the parameters that must be set in a BaseBandEqm MO to configure baseband equipment information. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP, and intra-frequency cells that are geographically adjacent but served by RRUs installed on different poles or towers be configured in the same connection set. For details, see 9.3 Planning. Issue 03 (2015-08-31)
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Table 9-2 Parameters related to baseband equipment Parameter Name
Parameter ID
Data Source
Setting Notes
Baseband Equipment ID
BASEBANDEQM.B ASEBANDEQMID
Network plan (negotiation not required)
-
Baseband Equipment Type
BASEBANDEQM.B ASEBANDEQMTYP E
Network plan (negotiation not required)
Set this parameter to ULDL.
UMTS UL Demodulation Mode
BASEBANDEQM.U MTSDEMMODE
Network plan (negotiation not required)
Set this parameter to NULL.
Cabinet No. of Process Unit n
CNn
Network plan (negotiation not required)
n indicates the cabinet number of the BBP, ranging from 0 to 7.
Subrack No. of Process Unit n
SRNn
Network plan (negotiation not required)
n indicates the subrack number of the BBP, ranging from 0 to 1.
Slot No. of Process Unit n
SNn
Network plan (negotiation not required)
n indicates the slot number of the BBP, ranging from 0 to 5.
The following table describes the parameters that must be set in an eUCellSectorEqm MO to configure a set of sector equipment for a cell. It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP. Table 9-3 Parameters related to sector equipment for a cell
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Parameter Name
Parameter ID
Data Source
Setting Notes
Local cell ID
EUCELLSECTOR EQM.LocalCellId
Network plan (negotiation not required)
-
Sector equipment ID
EUCELLSECTOR EQM.SectorEqmId
Network plan (negotiation not required)
-
Reference signal power
EUCELLSECTOR EQM.ReferenceSig nalPwr
Network plan (negotiation not required)
-
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Parameter Name
Parameter ID
Data Source
Setting Notes
Baseband equipment ID
EUCELLSECTOR EQM.BaseBandEq mId
Network plan (negotiation not required)
-
Scenario-specific Data Before enabling LOFD-081219 UL CoMP Based on Relaxed Backhaul, you must set the following parameters to prepare scenario-specific data. The following table describes the parameters that must be set in the CellAlgoSwitch and ENodeBAlgoSwitch MOs to configure UL CoMP based on coordinated BBU. Parameter Name
Parameter ID
Data Source
Setting Notes
UplinkCom pSwitch
CellAlgoSwit ch.UplinkCo mpSwitch
Network plan (negotiation not required)
This parameter specifies whether to enable UL CoMP for a cell. Default value: l UlJointReceptionSwitch:Off l UlJointReceptionPhaseIISwitch:Off l UlJointReception3CellSwitch:Off Recommended value: l UlJointReceptionSwitch:On l UlJointReceptionPhaseIISwitch:On l UlJointReception3CellSwitch:On
OverBBUs Switch
ENODEBAL GOSWITCH .OverBBUsS witch
Network plan (negotiation not required)
This parameter specifies whether to enable or disable UL CoMP based on coordinated BBU. Default value: UlJROverRelaxedBHSw:Off Recommended value: UlJROverRelaxedBHSw:On UL CoMP based on relaxed backhaul can be used only when all the following switches are turned on: l UlJointReceptionSwitch l UlJointReceptionPhaseIISwitch l UlJROverRelaxedBHSw
The following table describes parameter that must be set in the CellAlgoSwitch MO to configure an IRC switch.
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Parameter Name
Parameter ID
Data Source
Setting Notes
MRC/IRC adaptation switch
CellAlgoSwitch. MrcIrcAdptSwitc h
Network plan (negotiation not required)
The MrcIrcAdptSwitch parameter specifies whether to enable adaptive switching between MRC and IRC. Default value: ENABLE Recommended value: ENABLE
The following table describes the parameter that must be set in a CellUlCompAlgo MO to configure a UL CoMP A3 offset. Parameter Name
Parameter ID
Data Source
Setting Notes
This parameter specifies an A3 offset for UL CoMP based on relaxed backhaul.
CellUlCompAlg o.UlCompA3Off setForRelaxedB H
Network plan (negotiation not required)
This parameter specifies a UL CoMP A3 offset. The value range is from -30 to +30, with a unit of 0.5 dB. Default value: -6 Recommended value: -6
The following table describes parameter that must be set in the CellAlgoSwitch MO to configure a TTI bundling switch. Parameter Name
Parameter ID
Data Source
Setting Notes
Uplink schedule switch
CellAlgoSwitch. UlSchSwitch
Network plan (negotiation not required)
This parameter specifies whether to enable uplink scheduling in a cell. The TtiBundlingSwitch option of this parameter specifies whether to enable TTI bundling. Default value: TtiBundlingSwitch:Off Recommended value: TtiBundlingSwitch:On
9.4.3 Precautions It is recommended that intra-frequency cells that are served by RRUs installed on the same pole or tower be configured on the same BBP, and intra-frequency cells that are geographically adjacent but served by RRUs installed on different poles or towers be configured in the same connection set. For details, see 9.3 Planning. Issue 03 (2015-08-31)
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9.4.4 Hardware Adjustment It is recommended that UL CoMP be used only when the distance between the RRUs of the serving cell and coordinated cells is not greater than 1000 m.
9.4.5 Activation 9.4.5.1 Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs Enter the values of the parameters listed in Table 9-4 in a summary data file, which also contains other data for the new eNodeBs to be deployed. Then, import the summary data file into the CME for batch configuration. For detailed instructions, see "Creating eNodeBs in Batches" in the initial configuration guide for the eNodeB, which is available in the eNodeB product documentation. The summary data file may be a scenario-specific file provided by the CME or a customized file, depending on the following conditions: l
The MOs in Table 9-4 are contained in a scenario-specific summary data file. In this situation, set the parameters in the MOs, and then verify and save the file.
l
Some MOs in Table 9-4 are not contained in a scenario-specific summary data file. In this situation, customize a summary data file to include the MOs before you can set the parameters. Table 9-4 Parameters related to activation of LOFD-081219 UL CoMP Based on Relaxed Backhaul MO
Sheet in the Summary Data File
Parameter Group
Remarks
CellUlCompAlgo
eNodeB Radio Data
LocalCellId, UlCompA3OffsetForRelaxed BH
User-defined sheet
CellAlgoSwitch
eNodeB Radio Data
LocalCellId, UplinkCompSwitch, PuschIrcAlgoSwitch, UlSchSwitch
User-defined sheet
ENodeBAlgoSwitch
eNodeB Radio Data
OverBBUsSwitch
User-defined sheet
9.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs Batch reconfiguration using the CME is the recommended method to activate a feature on existing eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure is as follows: Issue 03 (2015-08-31)
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Step 1 Customize a summary data file with the MOs and parameters listed in section "Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs." For online help, press F1 when a CME window is active, and select Managing the CME > CME Guidelines > LTE Application Management > eNodeB Related Operations > Customizing a Summary Data File for Batch eNodeB Configuration. Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Export Data > Export Base Station Bulk Configuration Data (CME client mode), to export the eNodeB data stored on the CME into the customized summary data file. Step 3 In the summary data file, set the parameters in the MOs according to the setting notes provided in section "Data Preparation" and close the file. Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk Configuration Data (U2000 client mode), or choose LTE Application > Import Data > Import Base Station Bulk Configuration Data (CME client mode), to import the summary data file into the CME, and then start the data verification. Step 5 After data verification is complete, choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. For detailed operations, see Managing the CME > CME Guidelines > Script File Management > Exporting Incremental Scripts from a Planned Data Area in the CME online help. ----End
9.4.5.3 Using the CME to Perform Single Configuration On the CME, set the parameters listed in the "Data Preparation" section for a single eNodeB. The procedure is as follows: Step 1 In the planned data area, click Base Station in the upper left corner of the configuration window. Step 2 In area 1 shown in Figure 9-1, select the eNodeB to which the MOs belong.
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Figure 9-1 MO search and configuration window
NOTE
l To view descriptions of the parameters in the MO, click in area 4 and press F1. l Area 5 displays the details of a selected area-4 entry in vertical format. Click the Details icon to show or hide this area.
Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL. Step 4 In area 3, double-click the MO in the Object Name column. All parameters in this MO are displayed in area 4. Step 5 Set the parameters in area 4 or 5. Step 6 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts. ----End
9.4.5.4 Using the CME to Perform Feature Configuration Step 1 On the U2000 client, choose CME > Planned Area > Create Planned Area. Step 2 In the displayed Create Planned Area dialog box, specify Planned area name, select the eNodeB (for which UL CoMP based on relaxed backhaul is to be activated) on the Base Station tab page under Available NEs, and click Then, click OK.
so that it is added to Selected NEs.
NOTE
You can select one or more eNodeBs in this step.
Step 3 Choose CME > Advanced > Feature Operation and Maintenance > Export Feature Commission Data. Issue 03 (2015-08-31)
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Step 4 In the displayed dialog box, set Category to LTE, select LOFD-081219 UL CoMP based on relaxed backhaul, and then click Next. Step 5 Under Available Base Stations in the dialog box, select the eNodeB whose data is to be exported. Click Next.
so that the eNodeB is added to Selected Base Stations. Then, click
Step 6 In the dialog box, set Export as to the format (.xls or .xlsm) in which the exported data is to be saved. Click
to the right of Export path to specify the save path. Then, click Next.
Step 7 Wait until the data is exported. Step 8 Click the hyperlink to the save path. Alternatively, click Finish, and locate the exported file in the save path. Step 9 Set the non-UL-CoMP parameters suggested in the (eNodeB)comment.html file in the save path, and then set UL CoMP parameters in the UL CoMP data file (for example, LOFD-081219.xlsm). In the UL CoMP data file, you can click an MO on the Home sheet and set the parameters on the displayed sheet based on the network plan. Step 10 After setting the parameters, choose CME > Advanced > Feature Operation and Maintenance > Import Feature Commission Data on the U2000 client. In the displayed dialog box, select the UL CoMP data file, and click Next. Step 11 Wait until the file is imported, as shown in the following figure. Leave the Export incremental script check box selected (default setting). Click Finish. Step 12 In the displayed dialog box, check that the eNodeB is displayed in the Selected NEs area. Set Encrypt script and Script Executor Operation. You are advised to set Script Executor Operation to Launch script executor and activate exported project so that the script will be executed upon it is loaded. Then, click OK. Step 13 In the displayed confirmation dialog box, click Yes. Data synchronization starts for the eNodeB. If the Result is Success, UL CoMP based on relaxed backhaul has been activated. ----End NOTE
After all steps are finished, you can run specific MML commands to verify that the parameter settings take effect.
9.4.5.5 Using MML Commands MML Commands Step 1 Run the MOD CELLULCOMPALGO command to set a UL CoMP A3 offset. MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3OffsetForRelaxedBH=-6; NOTE
The default value is recommended.
Step 2 To activate inter-BBU 2-cell UL CoMP for LOFD-081219 UL CoMP Based on Relaxed Backhaul, run the MOD CELLALGOSWITCH command to turn on the UlJointReceptionSwitch and UlJointReceptionPhaseIISwitch for each cell involved. Then, run the MOD ENODEBALGOSWITCH command to turn on the UlJROverRelaxedBHSw switch for each eNodeB involved. Issue 03 (2015-08-31)
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2-cell UL CoMP: MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-1;
Step 3 To activate inter-BBU 3-cell UL CoMP for LOFD-081219 UL CoMP Based on Relaxed Backhaul, run the MOD CELLALGOSWITCH command to turn on the UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, and UlJointReception3CellSwitch for each cell involved. Then, run the MOD ENODEBALGOSWITCH command to turn on the UlJROverRelaxedBHSw switch for each eNodeB involved. 3-Cell UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-1;
Step 4 If the license for LOFD-001048 TTI Bundling has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the TtiBundlingSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UlSchSwitch=TtiBundlingSwitch-1;
Step 5 If the license for LOFD-001012 UL Interference Rejection Combining has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the MrcIrcAdptSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
----End
MML Command Examples NOTE
The commands for activating UL CoMP need to be executed for each cell involved. The following uses the configuration of one cell as an example.
2-Cell UL CoMP MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3OffsetForRelaxedBH=-6; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch= UlJROverRelaxedBHSw-1; MOD CELLALGOSWITCH: LocalCellId=0, UlSchSwitch=TtiBundlingSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
3-Cell UL CoMP MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3OffsetForRelaxedBH=-6; MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1; MOD ENODEBALGOSWITCH: OverBBUsSwitch= UlJROverRelaxedBHSw-1; MOD CELLALGOSWITCH: LocalCellId=0, UlSchSwitch=TtiBundlingSwitch-1; MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
9.4.6 Activation Observation 9.4.6.1 Using MML Commands Run the DSP CELLULCOMPCLUSTER command to query the coordinated cell list of one cell or the coordinated cell lists of all cells of the eNodeB. The command output contains the Issue 03 (2015-08-31)
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eNodeB IDs and local cell IDs of coordinated cells. If a coordinated cell list contains cells with different eNodeB IDs, the feature has been activated.
9.4.6.2 Using Counters If there are UEs that meet the feature activation requirements, you can use the counters L.ChMeas.ULRelaxedBHCoMP.PRB.Avg (ID: 1526737762) and L.ULCoMP.ULRelaxedBHCoMP.User.Avg (ID: 1526737763) to check whether the feature has been activated. If the value of any of the counters is not 0, this feature has been activated.
9.4.7 Reconfiguration N/A
9.4.8 Deactivation 9.4.8.1 Using the CME to Perform Batch Configuration Batch reconfiguration using the CME is the recommended method to deactivate a feature on eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure for feature deactivation is similar to that for feature activation described in 9.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs. In the procedure, modify parameters according to the following table. Table 9-5 Parameters related to deactivation of LOFD-070223 UL CoMP Based on Coordinated BBU MO
Sheet in the Summary Data File
Parameter Group
Remarks
ENodeBAlgoS witch
eNodeB Radio Data
OverBBUsSwitch
User-defined sheet
9.4.8.2 Using the CME to Perform Single Configuration On the CME, set parameters according to 9.4.8.1 Using the CME to Perform Batch Configuration. For detailed instructions, see 9.4.5.3 Using the CME to Perform Single Configuration described for feature activation.
9.4.8.3 Using MML Commands MML Commands l
To deactivate 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlJointReception3CellSwitch for each cell involved. MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
To deactivate LOFD-081219 UL CoMP Based on Relaxed Backhaul, run the MOD ENODEBALGOSWITCH command to turn off the UlJROverRelaxedBHSw for each eNodeB involved. MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-0;
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MML Command Examples NOTE
To deactivate one type of UL CoMP, the corresponding command needs to be executed for each cell or eNodeB involved. The following uses the configurations of one cell and one eNodeB as an example.
l
Deactivating 3-cell UL CoMP MOD CELLALGOSWITCH: LocalCellId=0, UplinkCompSwitch=UlJointReception3CellSwitch-0;
l
Deactivating LOFD-081219 UL CoMP Based on Relaxed Backhaul MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-0;
9.5 Performance Monitoring After this feature is activated, you can use the following counters for monitoring. Table 9-6 Counters related to this feature Counter
Expected Result
L.Traffic.UL.PktLoss.Loss.QCI.1
After UL CoMP based on relaxed backhaul takes effect, the IBLER and uplink packet loss rate of QCI 1 services decrease.
L.Traffic.UL.PktLoss.Tot.QCI.1
Uplink packet loss rate for QCI 1 services = L.Traffic.UL.PktLoss.Loss.QCI.1/ L.Traffic.UL.PktLoss.Tot.QCI.1 where l L.Traffic.UL.PktLoss.Loss.QCI.1: Number of lost uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell l L.Traffic.UL.PktLoss.Tot.QCI.1: Number of expected uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell L.ULCoMP.ULRelaxedBHCoMP.U ser.Avg L.ChMeas.ULRelaxedBHCoMP.PR B.Avg
The more the number of UEs and PRBs available for UL CoMP based on relaxed backhaul, the higher the gains.
Monitoring the packet loss rate for QCI 1 services The following table describes the required counters.
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Counter ID
Counter Name
Counter Description
1526727961
L.Traffic.UL.PktLoss.Loss.QCI.1
Number of lost uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell
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Counter ID
Counter Name
Counter Description
1526727962
L.Traffic.UL.PktLoss.Tot.QCI.1
Number of expected uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell
Monitoring the number of UL CoMP UEs and PUSCH PRBs The following table describes the required counters. Counter ID
Counter Name
Counter Description
1526737763
L.ULCoMP.ULRelaxedBHCoMP. User.Avg
Average number of UEs selected for UL CoMP based on relaxed backhaul in a cell
1526737762
L.ChMeas.ULRelaxedBHCoMP.P RB.Avg
Average number of PRBs selected for UL CoMP based on relaxed backhaul
9.6 Parameter Optimization When LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled, its performance is affected if intra-frequency neighboring cells have a PCI conflict. You are advised to turn on the PCI conflict alarm switch so that PCI collision or confusion can be reported. The command for turning on the switch is as follows: MOD ENODEBALGOSWITCH: PciConflictAlmSwitch=ON;
9.7 Troubleshooting Fault Description After LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled, the uplink throughput of CEUs in a cell does not increase under the same conditions as before this feature is enabled. After LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled in the whole network, the values of counters L.ULCoMP.User.Avg (ID: 1526728338), L.ULCoMP.User.Max (ID: 1526728339), and L.ULCoMP.RB (ID: 1526728340) of some or all cells remain 0.
Fault Handling Step 1 Check related alarms, for example, an alarm that indicates the capacity of a cell decreases. If there is such an alarm, handle the alarm according to the instructions in eNodeB Alarm Reference. If there is not such alarm, go to Step 2. Step 2 Run the LST CELLALGOSWITCH and LST ENODEBALGOSWITCH commands to check the UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, Issue 03 (2015-08-31)
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UlJROverRelaxedBHSw, and TtiBundlingSwitch settings. If any switch is turned off, turn it on and end the troubleshooting. If all switches are turned on, go to Step 3. Step 3 Run the DSP LICINFO command to check the Actual Used values of licenses IntraeNodeB UL CoMP(FDD), Intra-eNodeB UL CoMP Phase II(FDD), and UL CoMP based on Relaxed Backhaul(FDD). l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is 0, go to Step 4 and Step 5.
l
If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is not 0: –
If the Actual Used value of neither Intra-eNodeB UL CoMP Phase II(FDD) nor UL CoMP based on Relaxed Backhaul(FDD) is 0, go to Step 6 and Step 7.
–
If the Actual Used value of Intra-eNodeB UL CoMP Phase II(FDD) or UL CoMP based on Relaxed Backhaul(FDD) is 0, go to Step 8.
Step 4 Modify eNodeB configurations if they do not meet the UL CoMP deployment requirements. Step 5 Check whether the cells are configured with mutually exclusive features described in 4.5 Features Related to LOFD-081219 UL CoMP Based on Relaxed Backhaul. If yes, end the troubleshooting. Otherwise, go to Step 8. Step 6 Run the DSP CELLULCOMPCLUSTER command to check the coordinated cell list. If there are coordinated cells, go to Step 7. Otherwise, go to Step 8. Step 7 Check whether the cells selected for UL CoMP meet the requirements for the operating environment. If the cells do not, end the troubleshooting. If the cells do, go to Step 8. Step 8 Contact Huawei technical support. ----End
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10 Parameters
10
Parameters
Table 10-1 Parameters MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
ENodeB AlgoSwi tch
OverBB UsSwitc h
MOD ENODE BALGO SWITC H
LOFD-0 70223
Meaning:
LST ENODE BALGO SWITC H
LAOFD -001001 02
UL CoMP based on Coordin ated BBU
LAOFD -001001 01
LAOFD -001002 / TDLAO FD-001 002 LAOFD -001002 02 / TDLAO FD-001 00202 LAOFD -070201 / TDLAO FD-070 201 LAOFD -070202
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IntraBand Carrier Aggrega tion for Downlin k 2CC in 20MHz InterBand Carrier Aggrega tion for Downlin k 2CC in 20MHz Carrier Aggrega tion for Downlin k 2CC in 40MHz
Indicates whether to enable inter-BBU coordinating algorithms. This parameter consists of the following switches: UlJointReceptionOverBBUsSwitch: Indicates whether to enable uplink coordinated multipoint (UL CoMP) between cells established on BBPs in different BBUs. This function is enabled only when this switch is on. FreqCfgCaOverBBUsSwitch: Indicates whether to enable inter-BBU carrier aggregation (CA) in scenarios where CA is configured based on frequencies. Inter-BBU CA is enabled in the preceding scenarios only when this switch is on. This switch takes effect only when FreqCfgSwitch of the CaAlgoSwitch parameter in the ENodeBAlgoSwitch MO is on. Inter-BBU CA is enabled only when this switch is on. UlJROverRelaxedBHSw: Indicates whether to enable the relaxed-backhaul-based inter-BBU coordinating algorithm. UlJROverRelaxedBHSw: Indicates whether to enable uplink coordinated multipoint (UL CoMP) between cells established on BBPs in different BBUs. This function is enabled only when this switch is on.
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MO
Parame ter ID
MML Comma nd
10 Parameters
Feature ID
Feature Name
Description
TDLAO FD-001 00111
Support of UE Categor y6
UlSfnJROverBBUsSwitch: Indicates whether to enable UL CoMP in inter-BBU SFN cells.
Flexible CA from Multiple Carriers
UL CoMP is enabled in inter-BBU SFN cells only when this switch is on. This switch applies to LTE TDD only.
LOFD-0 81219 TDLOF D-08120 7
IntereNodeB CA based on Coordin ated BBU Intraband Carrier Aggrega tion for Downlin k 2CC in 30MHz
UlSfnJROverBBUsSwitch:
GUI Value Range: UlJointReceptionOverBBUsSwitch(UlJointReceptionOverBBUsSwitch), FreqCfgCaOverBBUsSwitch(FreqCfgCaOverBBUsSwitch), UlJROverRelaxedBHSw(UlJROverRelaxedBHSw), UlSfnJROverBBUsSwitch(UlSfnJROverBBUsSwitch) Unit: None Actual Value Range: UlJointReceptionOverBBUsSwitch, FreqCfgCaOverBBUsSwitch, UlJROverRelaxedBHSw, UlSfnJROverBBUsSwitch Default Value: UlJointReceptionOverBBUsSwitch:Off, FreqCfgCaOverBBUsSwitch:Off, UlJROverRelaxedBHSw:Off, UlSfnJROverBBUsSwitch:Off
UL CoMP based on relaxed backhau l UL CoMP based on Coordin ated BBU
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10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellUlC ompAlg o
UlComp A3Offse tForRela xedBH
MOD CELLU LCOMP ALGO
LOFD-0 81219
UL CoMP based on relaxed backhau l
Meaning: Indicates the offset for reporting the UL CoMP event. This offset is the difference between the signal quality of a neighboring cell and that of the serving cell. A larger value indicates that a neighboring cell must have better quality for the reporting of the event. For details, see 3GPP TS 36.331.
LST CELLU LCOMP ALGO
GUI Value Range: -30~30 Unit: 0.5dB Actual Value Range: -15~15 Default Value: -6
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10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellAlg oSwitch
UplinkC ompSwi tch
MOD CELLA LGOSW ITCH
LOFD-0 01066 / TDLOF D-00106 6
IntraeNodeB UL CoMP
Meaning:
IntraeNodeB UL CoMP Phase II
If all of UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, UlJointReception3CellSwitch, and UlHetnetJointReceptionSwitch of this parameter are off, UL CoMP is disabled.
LST CELLA LGOSW ITCH
LOFD-0 70222 LOFD-0 70223 LAOFD -080203 LOFD-0 81219 LAOFD -070213 LAOFD -070214
UL CoMP based on Coordin ated BBU Hetnet UL CoMP UL CoMP based on relaxed backhau l IntraeNodeB UL CoMP Phase II UL CoMP based on Coordin ated BBU
Indicates whether to enable Uplink Coordinated Multiple Points Reception (UL CoMP) for a cell.
If UlJointReceptionSwitch is on, UlJointReceptionPhaseIISwitch is off, UlJointReception3CellSwitch is off, and UlHetnetJointReceptionSwitch is off, intrasite UL CoMP is enabled, and each UE supports UL CoMP in at most two cells. If UlJointReceptionSwitch is on, UlJointReceptionPhaseIISwitch is on, UlJointReception3CellSwitch is off, and UlHetnetJointReceptionSwitch is off, intraBBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most two cells. If UlJointReceptionSwitch is on, UlJointReceptionPhaseIISwitch is on, UlJointReception3CellSwitch is on, and UlHetnetJointReceptionSwitch is off, intraBBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most three cells. If UlJointReceptionSwitch is on, UlJointReceptionPhaseIISwitch is on, UlJointReception3CellSwitch is off, and UlHetnetJointReceptionSwitch is on, UL CoMP is enabled in HetNet networking, intra-BBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most two cells. If UlJointReceptionSwitch is on, UlJointReceptionPhaseIISwitch is on, UlJointReception3CellSwitch is on, and UlHetnetJointReceptionSwitch is on, UL CoMP is enabled in HetNet networking, intra-BBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most three cells. UlCompRollbackSwitch controls whether a CoMP UE is not selected any more in UL CoMP and becomes a non-CoMP UE. If this switch is on, the eNodeB detects signal qualities and interference changes of the serving and coordinating cells of a CoMP UE in real time. If the eNodeB detects that the interference from
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MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
signals of UEs in the coordinating cell cannot be mitigated using UL CoMP, the eNodeB no longer selects the CoMP UE in UL CoMP, and the UE becomes a non-CoMP UE. If this switch is off, the eNodeB always selects the CoMP UE in UL CoMP, and the UE will never become a non-CoMP UE. This parameter applies only to cells established on LBBPc boards. UlJointReception3CellSwitch controls whether threecell UL CoMP is enabled in the serving cell. The coordinating cell cannot know whether itself is involved in three-cell UL CoMP. Assume UlJointReception3CellSwitch is on for cell A and UlJointReceptionSwitch is on for cell B. Then, threecell UL CoMP is enabled in cell A that acts as the serving cell while three-cell UL CoMP does not need to be enabled in cell B that acts as a coordinating cell. This switch applies only to FDD cells. UlHetnetCompManualNcellCfgSw: If this option is deselected, the measurement neighboring cell set of this macro cell or the macro cell to which this micro cell belongs is dynamically obtained. If this option is selected, the measurement neighboring cell set of this macro cell and the macro cell to which this micro cell belongs is manually configured. UlHetnetCompOnUlRsrpSw: If this option is deselected, the coordinating cell set consisting of macro and micro cells is selected based on the reporting of event A3. If this option is selected, the coordinating cell set consisting of macro cells is selected based on the reporting of event A3, and the coordinating cell set consisting of macro and micro cells is selected based on the measurements of uplink RSRP or based on the reporting of event A3. This option takes effect only when the UlHetnetJointReceptionSwitch option is selected. GUI Value Range: UlJointReceptionSwitch(UlJointReceptionSwitch), UlJointReceptionPhaseIISwitch(UlJointReceptionPhaseIISwitch), UlCompRollbackSwitch(UlCompRollbackSwitch), UlJointReception3CellSwitch(UlJointReception3Cell Switch), UlHetnetJointReceptionSwitch(UlHetnetJointReceptionSwitch), UlHetnetCompManualNcellCfgSw(UlHetnetCompManualNcellCfgSw),
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MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
UlHetnetCompOnUlRsrpSw(UlHetnetCompOnUlRsr pSw) Unit: None Actual Value Range: UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, UlCompRollbackSwitch, UlJointReception3CellSwitch, UlHetnetJointReceptionSwitch, UlHetnetCompManualNcellCfgSw, UlHetnetCompOnUlRsrpSw Default Value: UlJointReceptionSwitch:Off, UlJointReceptionPhaseIISwitch:Off, UlCompRollbackSwitch:On, UlJointReception3CellSwitch:Off, UlHetnetJointReceptionSwitch:Off, UlHetnetCompManualNcellCfgSw:Off, UlHetnetCompOnUlRsrpSw:Off
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10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellAlg oSwitch
UlJRAnt NumCo mbSw
MOD CELLA LGOSW ITCH
LOFD-0 01066 / TDLOF D-00106 6
IntraeNodeB UL CoMP
Meaning:
IntraeNodeB UL CoMP Phase II
Ul1R1RJRSwitch: Indicates whether to enable UL CoMP among cells each with one RX antenna. If this option is selected, UL CoMP is enabled among such cells. You are advised to select this option when the serving cell and coordinating cells are not connected based on relaxed backhaul. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE FDD.
LST CELLA LGOSW ITCH
LOFD-0 70222 / TDLOF D-08120 8 LOFD-0 70223 / TDLOF D-08120 7 LOFD-0 03029 LOFD-0 70205
UL CoMP based on Coordin ated BBU SFN Adaptiv e SFN/ SDMA
Indicates whether to enable UL CoMP among cells each with the specific number of RX antennas.
Ul1R2RJRSwitch: Indicates whether to enable UL CoMP among cells each with one RX antenna and cells each with two RX antennas. If this option is selected, UL CoMP among such cells is enabled. You are advised to select this option when the serving cell and coordinating cells are not connected based on relaxed backhaul. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE FDD. Ul2R8RJRSwitch: Indicates whether to enable UL CoMP among cells each with two RX antennas and cells each with eight RX antennas. If this option is selected, UL CoMP among such cells is enabled. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE TDD cells in cell combination scenarios. Ul4R8RJRSwitch: Indicates whether to enable UL CoMP among cells each with four RX antennas and cells each with eight RX antennas. If this option is selected, UL CoMP among such cells is enabled. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE TDD. Ul8R8RJRSwitch: Indicates whether to enable UL CoMP among cells each with eight RX antennas. If this option is selected, UL CoMP among such cells is enabled. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE TDD. UL CoMP among cells each with two RX antennas or cells each with four RX antennas is enabled by default in the scenarios indicated by specific options under the UplinkCompSwitch or SfnUplinkCompSwitch parameter when the options are selected.
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
GUI Value Range: Ul1R1RJRSwitch(Ul1R1RJRSwitch), Ul1R2RJRSwitch(Ul1R2RJRSwitch), Ul2R8RJRSwitch(Ul2R8RJRSwitch), Ul4R8RJRSwitch(Ul4R8RJRSwitch), Ul8R8RJRSwitch(Ul8R8RJRSwitch) Unit: None Actual Value Range: Ul1R1RJRSwitch, Ul1R2RJRSwitch, Ul2R8RJRSwitch, Ul4R8RJRSwitch, Ul8R8RJRSwitch Default Value: Ul1R1RJRSwitch:Off, Ul1R2RJRSwitch:Off, Ul2R8RJRSwitch:Off, Ul4R8RJRSwitch:Off, Ul8R8RJRSwitch:Off
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140
eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellAlg oSwitch
PuschIrc AlgoSwi tch
MOD CELLA LGOSW ITCH
LOFD-0 01012 / TDLOF D-00101 2
UL Interfere nce Rejectio n Combini ng
Meaning:
LST CELLA LGOSW ITCH
Indicates the interference rejection combining (IRC) algorithm applied to the PUSCH. This parameter includes the following switches: MrcIrcAdptSwitch: Indicates whether to apply MRC/IRC adaptation on the PUSCH. SmartIrcSwitch: Indicates whether to apply enhanced 8R IRC algorithm to the PUSCH. This switch applies only to 8R and 4R CoMP scenarios in TDD macro eNodeBs. MrcIrcAdaptivefor2R: Indicates whether to apply MRC/IRC adaptation on the PUSCH in 2R scenarios. This switch takes effect only when MrcIrcAdptSwitch is on. If MrcIrcAdaptivefor2R is on, IRC is applied to the PUSCH in 2R scenarios. If MrcIrcAdaptivefor2R is off, MRC/IRC adaptation is applied to the PUSCH in 2R scenarios. In 2R cells established on LBBPc boards: If MrcIrcAdptSwitch is on, IRC applies to the PUSCH. If MrcIrcAdptSwitch is off, MRC applies to the PUSCH. In 2R cells established on LBBPd boards: The setting of MrcIrcAdaptivefor2R takes effect only when MrcIrcAdptSwitch is on. If MrcIrcAdptSwitch and MrcIrcAdaptivefor2R are on, MRC/IRC adaptation applies to the PUSCH. If MrcIrcAdptSwitch is on and MrcIrcAdaptivefor2R is off, IRC applies to the PUSCH. If MrcIrcAdptSwitch is off, MRC applies to the PUSCH. In 2R cells established on the UBBP boards: If MrcIrcAdptSwitch is on, MRC/IRC adaptation applies to the PUSCH. If MrcIrcAdptSwitch is off, MRC applies to the PUSCH. In 4R cells established on the LBBPc, LBBPd, or UBBP boards: If MrcIrcAdptSwitch is on, MRC/IRC adaptation applies to the PUSCH. If MrcIrcAdptSwitch is off, MRC applies to the PUSCH. GUI Value Range: MrcIrcAdptSwitch(MrcIrcAdptSwitch), SmartIrcSwitch(SmartIrcSwitch), MrcIrcAdaptivefor2R(MrcIrcAdaptivefor2R) Unit: None
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
Actual Value Range: MrcIrcAdptSwitch, SmartIrcSwitch, MrcIrcAdaptivefor2R Default Value: MrcIrcAdptSwitch:On, SmartIrcSwitch:Off, MrcIrcAdaptivefor2R:Off CellUlC ompAlg o
UlComp A3Offse t
MOD CELLU LCOMP ALGO LST CELLU LCOMP ALGO
LOFD-0 01066 / TDLOF D-00106 6
IntraeNodeB UL CoMP
Meaning: Indicates the offset for UL CoMP event A3. A larger value indicates that a neighboring cell must have better quality for the reporting of the event. For details, see 3GPP TS 36.331. GUI Value Range: -30~30 Unit: 0.5dB Actual Value Range: -15~15 Default Value: -20
CellUlsc hAlgo
UlHoppi ngType
MOD CELLU LSCHA LGO LST CELLU LSCHA LGO
LBFD-0 02025 / TDLBF D-00202 5 LOFD-0 01015 / TDLOF D-00101 5
Basic Scheduli ng Enhance d Scheduli ng
Meaning: Indicates whether frequency hopping (FH) is enabled or disabled and which FH type is used. Hopping_OFF: indicates that FH is disabled. Hopping_Type1: indicates that adaptive FH is enabled and FH type 1 is used. In this scenario, UEs in the cell can determine whether to use FH based on the actual situation. Hopping_Type2: indicates that adaptive FH is enabled and FH type 2 is used. In this scenario, UEs in the cell can determine whether to use FH based on the actual situation. Hopping_Type2_RANDOM: indicates that random FH is enabled and FH type 2 is used. In this scenario, all UEs in the cell use FH. GUI Value Range: HOPPING_OFF(Hopping off), HOPPING_TYPE1(Hopping Type 1), HOPPING_TYPE2(Hopping Type 2), HOPPING_TYPE2_RANDOM(Hopping Type 2 Random) Unit: None Actual Value Range: HOPPING_OFF, HOPPING_TYPE1, HOPPING_TYPE2, HOPPING_TYPE2_RANDOM Default Value: HOPPING_OFF(Hopping off)
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eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
Cell
MultiRr uCellMo de
ADD CELL
LOFD-0 03029 / TDLOF D-00107 5
SFN
Meaning: Indicates the type of the multi-RRU cell.
Adaptiv e SFN/ SDMA
GUI Value Range: SFN(SFN), CELL_COMBINATION(Cell Combination), TWO_RRU_COMBINATION(TWO RRU Combination), DIGITAL_COMBINATION(Cell Digital Combination), MPRU_AGGREGATION(MPRU_AGGREGATION)
MOD CELL LST CELL
LOFD-0 70205 / TDLOF D-00200 8 TDLOF D-00109 8 TDLOF D-00108 0 TDLOF D-00108 1 TDLOF D-00108 2
CellMcP ara
Hysteres is
MOD CELLM CPARA
None
InterBBP SFN InterBBU SFN InterBBP Adaptiv e SFN/ SDMA
Unit: None Actual Value Range: SFN, CELL_COMBINATION, TWO_RRU_COMBINATION, DIGITAL_COMBINATION, MPRU_AGGREGATION Default Value: SFN(SFN)
InterBBU Adaptiv e SFN/ SDMA
None
LST CELLM CPARA
Meaning: Indicates the hysteresis for reporting event A3 or A6. This parameter is used to prevent frequent entering or leaving of event A3 or A6 and decision errors due to radio signal fluctuation. For details, see 3GPP TS 36.331. GUI Value Range: 0~30 Unit: 0.5dB Actual Value Range: 0~15 Default Value: 4
CellMcP ara
Trigger Quantity
MOD CELLM CPARA LST CELLM CPARA
None
None
Meaning: Indicates whether event A3 or A6 is triggered based on RSRP or RSRQ values. The measured RSRP values are stable, slightly varying with the load, and therefore there is little signal fluctuation. The measured RSRQ values vary with the load and are likely to reflect the signal quality of the cell in real time. GUI Value Range: RSRP, RSRQ Unit: None Actual Value Range: RSRP, RSRQ Default Value: RSRP
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eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellMcP ara
ReportQ uantity
MOD CELLM CPARA
None
None
Meaning: Indicates the type of the value to be included in the measurement report after event A3 or A6 is triggered, which can be set to SAME_AS_TRIG_QUAN(Same as Trig Quan) or BOTH(Both). The value SAME_AS_TRIG_QUAN(Same as Trig Quan) indicates that the type of the value to be included in the measurement report is the same as that specified by the TriggerQuantity parameter. The value BOTH(Both) indicates that both RSRP and RSRQ values are included in the measurement report. The measured RSRP values are stable, slightly varying with the load, and therefore there is little signal fluctuation. The measured RSRQ values vary with the load and are likely to reflect the signal quality of the cell in real time. For details, see 3GPP TS 36.331.
LST CELLM CPARA
GUI Value Range: SAME_AS_TRIG_QUAN(Same as Trig Quan), BOTH Unit: None Actual Value Range: SAME_AS_TRIG_QUAN, BOTH Default Value: BOTH CellMcP ara
TimetoT rigger
MOD CELLM CPARA LST CELLM CPARA
None
None
Meaning: Indicates the time-to-trigger for reporting event A3 or A6. When detecting that the signal quality in the serving cell and that in at least one neighboring cell meet the entering condition, the UE does not report the event to the eNodeB immediately. Instead, the UE reports the event only when the signal quality continuously meets the entering condition during the time-to-trigger. GUI Value Range: 0ms, 40ms, 64ms, 80ms, 100ms, 128ms, 160ms, 256ms, 320ms, 480ms, 512ms, 640ms, 1024ms, 1280ms, 2560ms, 5120ms Unit: ms Actual Value Range: 0ms, 40ms, 64ms, 80ms, 100ms, 128ms, 160ms, 256ms, 320ms, 480ms, 512ms, 640ms, 1024ms, 1280ms, 2560ms, 5120ms Default Value: 640ms
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eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellMcP ara
ReportIn terval
MOD CELLM CPARA
None
None
Meaning: Indicates the interval between periodic measurement reports that are sent after event A3 or A6 is triggered. For details, see 3GPP TS 36.331.
LST CELLM CPARA
GUI Value Range: 120ms, 240ms, 480ms, 640ms, 1024ms, 2048ms, 5120ms, 10240ms, 1min, 6min, 12min, 30min, 60min Unit: None Actual Value Range: 120ms, 240ms, 480ms, 640ms, 1024ms, 2048ms, 5120ms, 10240ms, 1min, 6min, 12min, 30min, 60min Default Value: 5120ms
CellMcP ara
ReportA mount
MOD CELLM CPARA
None
None
LST CELLM CPARA
Meaning: Indicates the number of periodic measurement reports that are sent after event A3 or A6 is triggered. For details, see 3GPP TS 36.331. GUI Value Range: r1(1), r2(2), r4(4), r8(8), r16(16), r32(32), r64(64), Infinity(Infinity) Unit: None Actual Value Range: r1, r2, r4, r8, r16, r32, r64, Infinity Default Value: Infinity(Infinity)
BASEB ANDEQ M
BASEB ANDEQ MID
ADD BASEB ANDEQ M LST BASEB ANDEQ M
None
None
Meaning: Indicates the number of the baseband equipment. GUI Value Range: 0~23 Unit: None Actual Value Range: 0~23 Default Value: None
MOD BASEB ANDEQ M RMV BASEB ANDEQ M
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eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
BASEB ANDEQ M
BASEB ANDEQ MTYPE
ADD BASEB ANDEQ M
None
None
Meaning: Indicates the type of baseband equipment. GUI Value Range: UL(UL), DL(DL), ULDL(Combined UL and DL) Unit: None
LST BASEB ANDEQ M
Actual Value Range: UL, DL, ULDL Default Value: None
MOD BASEB ANDEQ M RMV BASEB ANDEQ M BASEB ANDEQ M
UMTSD EMMO DE
ADD BASEB ANDEQ M
None
None
LST BASEB ANDEQ M
Meaning: Indicates the demodulation mode of uplink baseband equipment for UMTS mode. When uplink (or uplink and downlink) baseband equipment is added, its demodulation mode must be specified. Different demodulation modes can be specified for different sets of uplink (or uplink and downlink) baseband equipment. This parameter is not used for GSM mode, and therefore it is recommended that this parameter be set to NULL for GSM mode. This parameter cannot be set to NULL for UMTS mode. This parameter is not used for LTE mode, and therefore it is recommended that this parameter be set to NULL for LTE mode. GUI Value Range: NULL(NULL), DEM_4_CHAN(4Channels Demodulation Mode), DEM_ECON_4_CHAN(Economical 4-Channels Demodulation Mode), DEM_2_CHAN(2-Channels Demodulation Mode) Unit: None Actual Value Range: NULL, DEM_4_CHAN, DEM_ECON_4_CHAN, DEM_2_CHAN Default Value: None
MBMSP ara
LocalCe llId
DSP MBMSP ARA
None
None
Meaning: This parameter indicates the local ID of the cell. It uniquely identifies a cell within an eNodeB. GUI Value Range: 0~255 Unit: None Actual Value Range: 0~255 Default Value: None
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eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
eUCellS ectorEq m
SectorE qmId
ADD EUCEL LSECT OREQ M
None
None
Meaning: Indicates the ID of the sector device that serves the cell,it uniquely identifies a sector device within an eNodeB. GUI Value Range: 0~65535 Unit: None
DSP EURTW P
Actual Value Range: 0~65535 Default Value: None
LST EUCEL LSECT OREQ M MOD EUCEL LSECT OREQ M RMV EUCEL LSECT OREQ M eUCellS ectorEq m
Referen ceSignal Pwr
ADD EUCEL LSECT OREQ M MOD EUCEL LSECT OREQ M LST EUCEL LSECT OREQ M
Issue 03 (2015-08-31)
None
None
Meaning: Indicates the reference signal power of the cell sector device. The value 32767 indicates that this reference signal power parameter is invalid. In this case, the reference signal power of the cell equals the value of the PDSCHCFG parameter. For details, see 3GPP TS 36.213.This parameter is valid only when a multi-RRU cell works in SFN,MPRU_AGGREGATION or cell combination mode. GUI Value Range: -600~500,32767 Unit: 0.1dBm Actual Value Range: -60~50,3276.7 Default Value: 32767
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147
eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
eUCellS ectorEq m
BaseBan dEqmId
ADD EUCEL LSECT OREQ M
None
None
Meaning: Indicates the ID of the baseband equipment serving a cell. When this parameter is set to 255, the baseband equipment serving a cell is not specified. In this scenario, the LTE baseband processing units (LBBPs) serving a cell are selected among all LBBPs in the eNodeB, and the LBBPs to which the cell's serving RRU is connected are preferentially selected.
MOD EUCEL LSECT OREQ M
When this parameter is set to a value other than 255, the cell is served by LBBPs in the specified baseband equipment, and the LBBPs to which the cell's serving RRU is connected are preferentially selected.
LST EUCEL LSECT OREQ M
GUI Value Range: 0~23,255 Unit: None Actual Value Range: 0~23,255 Default Value: 255
eUCellS ectorEq m
LocalCe llId
ADD EUCEL LSECT OREQ M LST EUCEL LSECT OREQ M
None
None
Meaning: Indicates the local cell identity. It uniquely identifies a cell within an eNodeB. GUI Value Range: 0~255 Unit: None Actual Value Range: 0~255 Default Value: None
MOD EUCEL LSECT OREQ M RMV EUCEL LSECT OREQ M DSP EURTW P
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eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
Cell
eNodeB Id
DSP CELL
None
None
Meaning: Indicates the ID of the eNodeB. GUI Value Range: 0~1048575
DSP CELLP HYTOP O CellAlg oSwitch
MrcIrcA dptSwitc h
MOD CELLA LGOSW ITCH LST CELLA LGOSW ITCH
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Unit: None Actual Value Range: 0~1048575 Default Value: None LOFD-0 01012 / TDLOF D-00101 2
UL Interfere nce Rejectio n Combini ng
Meaning: Indicates whether to apply MRC/IRC adaptation to the PUSCH. GUI Value Range: DISABLE(Disable), ENABLE(Enable) Unit: None Actual Value Range: DISABLE, ENABLE Default Value: ENABLE(Enable)
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149
eRAN UL CoMP Feature Parameter Description
10 Parameters
MO
Parame ter ID
MML Comma nd
Feature ID
Feature Name
Description
CellAlg oSwitch
UlSchS witch
MOD CELLA LGOSW ITCH
LOFD-0 01016 / TDLOF D-00101 6
VoIP Semipersisten t Scheduli ng
Meaning:
LST CELLA LGOSW ITCH
LOFD-0 01048 / TDLOF D-00104 8 LOFD-0 0101502 / TDLOF D-00101 502 TDLBF D-00202 5 LBFD-0 70102 / TDLBF D-07010 2 LOFD-0 01002 LOFD-0 01058 LBFD-0 01006
TTI Bundlin g Dynami c Scheduli ng Basic Scheduli ngTDL OFD-07 0224:Sc heduling Based on Max Bit Rate MBR>G BR Configu ration UL 2x2 MUMIMO UL 2x4 MUMIMO AMC
This parameter indicates the switches related to uplink (UL) scheduling in the cell. The switches are used to enable or disable specific UL scheduling functions. SpsSchSwitch: Indicates the switch used to enable or disable semi-persistent scheduling during talk spurts of VoIP services. If this switch is on, semi-persistent scheduling is applied during talk spurts of VoIP services. If this switch is off, dynamic scheduling is applied during talk spurts of VoIP services. SinrAdjustSwitch: Indicates whether to adjust the measured signal to interference plus noise ratio (SINR) based on ACK/NACK in UL hybrid automatic repeat request (HARQ) processes. PreAllocationSwitch: Indicates whether to enable preallocation in the uplink. When this switch is on: (1) If SmartPreAllocationSwitch is off and a UE is in the discontinuous reception (DRX) state, preallocation is disabled for the UE in the uplink; (2) If SmartPreAllocationSwitch is off and the UE is not in the DRX state, preallocation is enabled for the UE in the uplink; (3) If SmartPreAllocationSwitch is on and the SmartPreAllocationDuration parameter value is greater than 0, smart preallocation is enabled for the UE in the uplink; (4) If SmartPreAllocationSwitch is on and the SmartPreAllocationDuration parameter value is 0, preallocation is disabled for the UE in the uplink. If this switch is off, preallocation is disabled for the UE in the uplink. If bearer-level preallocation or bearer-level smart preallocation is enabled for a UE with a QCI class, cell-level preallocation and celllevel smart preallocation do not apply to UEs with the QCI. UlVmimoSwitch: Indicates whether to enable multiuser MIMO (MU-MIMO) in the UL. If this switch is on, the eNodeB performs MU-MIMO pairing among UEs based on related principles. UEs forming a pair transmit data using the same time-frequency resources, which improves system throughput and spectral efficiency. TtiBundlingSwitch: Indicates whether to enable transmission time interval (TTI) bundling. If TTI bundling is enabled, more transmission opportunities are available to UEs within the delay budget for VoIP
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
services on the Uu interface, thereby improving uplink coverage. ImIcSwitch: Indicates whether to enable the intermodulation interference (IM) cancellation for UEs. When data is transmitted in both uplink and downlink, two IM components are generated symmetrically beside the Direct Current (DC) subcarrier on the downlink receive channel due to interference from uplink radio signals. If this switch is on, IM component elimination is performed on UEs. If this switch is off, IM component elimination is not performed on UEs. This switch applies only to FDD cells working in frequency band 20. SmartPreAllocationSwitch: Indicates whether to enable uplink smart preallocation when preallocation is enabled (by turning on PreAllocationSwitch). If both PreAllocationSwitch and SmartPreAllocationSwitch are on and SmartPreAllocationDuration is set to a value greater than 0, uplink smart preallocation is enabled; otherwise, uplink smart preallocation is disabled. PuschDtxSwitch: Indicates whether the eNodeB uses the physical uplink shared channel (PUSCH) discontinuous transmission (DTX) detection result during UL scheduling. In an LTE FDD cell, if this switch is on, based on the PUSCH DTX detection result, the eNodeB determines whether to perform adaptive retransmission during UL scheduling and also adjusts the control channel element (CCE) aggregation level of the physical downlink control channel (PDCCH) carrying downlink control information (DCI) format 0. If an FDD cell is established on an LBBPc, this switch takes effect only when the cell uses less than four RX antennas and normal cyclic prefix (CP) in the uplink and the SrsCfgInd parameter in the SRSCfg MO is set to BOOLEAN_TRUE. Note that the LBBPc does not support PUSCH DTX detection for UEs with MUMIMO applied. In an LTE TDD cell, this switch takes effect only when the cell is configured with subframe configuration 2 or 5. After this switch takes effect, the eNodeB adjusts the CCE aggregation level based on the PUSCH DTX detection results. Note that LTE TDD cells established on LBBPc boards do not support PUSCH DTX detection. UlIblerAdjustSwitch: Indicates whether to enable the uplink initial block error rate (IBLER) adjustment Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
algorithm. If this switch is on, IBLER convergence target is adjusted to increase the cell edge throughput. When this switch is on, the recommended configuration of parameter DopMeasLevel in MO CellUlschAlgo is CLASS_1. UlEnhancedFssSwitch: Indicates whether to enable uplink load-based enhanced frequency selection. This switch applies only to FDD cells. UlIicsAlgoSwitch: Indicates whether to enable the UL IICS algorithm. If this switch is on, interference can be reduced based on accurate detection of user attributes and resource scheduling coordination, thereby increasing the cell edge throughput. This switch applies only to LTE TDD networks. UlEnhancedSrSchSwitch: Indicates whether uplink rescheduling is performed only when the On Duration timer for the DRX long cycle starts. Uplink rescheduling is required if the number of HARQ retransmissions for a scheduling request (SR) reaches the maximum value but the scheduling still fails. If this switch is on, uplink re-scheduling is performed only when the On Duration timer for the DRX long cycle starts. If this switch is off, uplink re-scheduling is performed immediately when the number of HARQ retransmissions for SR reaches the maximum value but the scheduling still fails. It is recommended that the switch be turned on in live networks. SchedulerCtrlPowerSwitch: Indicates whether the uplink scheduler performs scheduling without considering power control restrictions. If this switch is on, the uplink scheduler performs scheduling without considering power control restrictions, which ensures full utilization of the transmit power for all UEs. If this switch is off, the uplink scheduler considers power control restrictions while performing scheduling, which prevents full utilization of the transmit power for UEs at far or medium distances from the cell center. UlMinGbrSwitch: Indicates whether to enable uplink minimum guaranteed bit rate (GBR). If this switch is on, the minimum GBR of non-GBR services is ensured by increasing the scheduling priority of UEs whose non-GBR service rates are lower than the minimum GBR of GBR services. UlMbrCtrlSwitch: Indicates whether to enable uplink scheduling based on the maximum bit rate (MBR) and Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
guaranteed bit rate (GBR) on the GBR bearer. If this switch is on, the eNodeB performs uplink scheduling on GBR bearers based on the MBR and GBR. If this switch is off, the eNodeB performs uplink scheduling on GBR bearers based only on the GBR. MbrUlSchSwitch: Indicates whether the eNodeB performs uplink scheduling based on MBR. If this switch is on, the eNodeB prioritizes UEs based on the MBRs during uplink scheduling. This parameter applies only to LTE TDD cells. UeAmbrUlSchSwitch: Indicates whether the eNodeB performs uplink scheduling based on the aggregate maximum bit rate (AMBR) of UEs. If this switch is on, the eNodeB prioritizes UEs based on the AMBRs during uplink scheduling. This parameter applies only to LTE TDD cells. UlEnhancedDopplerSwitch: Indicates whether to enable enhanced uplink scheduling based on mobility speed. If this switch is on, enhanced uplink scheduling based on mobility speed is enabled. If this switch is on, the eNodeB determines whether a UE is a lowmobility UE based on the Doppler measurement in the physical layer, and then improves uplink frequency selective scheduling performance for low-mobility UEs. If this switch is off, enhanced uplink scheduling based on mobility speed is disabled. This switch takes effect only when the UlEnhancedDopplerSwitch parameter is set to CLASS_1. This switch does not take effect on cells established on an LBBPc. UlRaUserSchOptSw: Indicates whether the eNodeB raises the scheduling priority of UEs sending uplink access signaling, including MSG5 and the RRC Connection Reconfiguration Complete message. If this switch is on, the eNodeB raises the scheduling priority of UEs sending uplink access signaling. If this switch is off, the eNodeB does not raise the scheduling priority of UEs sending uplink access signaling. UlLast2RetransSchOptSwitch: Indicates whether to enable optimization on the scheduling policy for the last two retransmissions. If this switch is on, optimization on the scheduling policy for the last two retransmissions is enabled. If the UE transmit power is not limited, adaptive retransmission is used and the number of RBs increases in the last two retransmissions to increase the receive success rate of Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
the last two retransmissions and decrease uplink RBLER. If this switch is off, optimization on the scheduling policy for the last two retransmissions is disabled. This switch does not apply to LTE TDD cells. UlInterfFssSwitch: Indicates whether to enable interference-based uplink frequency-selective scheduling. This switch applies only to LTE FDD networks. UlSmallRBSpectralEffOptSw: Indicates whether to enable spectral efficiency optimization on uplink small RBs. If this switch is on, the optimization is enabled, thereby ensuring that the transmission block size calculated based on optimized spectral efficiency is not less than the traffic volume needs to be scheduled. If this switch is off, the optimization is disabled. PuschUsePucchRbSwitch: Indicates whether PUCCH RBs can be occupied by the PUSCH. In scenarios with a single user, if this switch is on, PUCCH RBs can be occupied by the PUSCH. If this switch is off, PUCCH RBs cannot be occupied by the PUSCH. In scenarios with multiple users, PUCCH RBs cannot be occupied by the PUSCH no matter whether this switch is on or off. PuschDtxSchOptSwitch: If this switch is on, the eNodeB determines whether to perform adaptive retransmission during UL scheduling based on the PUSCH DTX detection result. This switch takes effect only when subframe configuration 2 or 5 is used. If a TDD cell is established on an LBBPc, PUSCH DTX detection is not supported. This switch applies only to LTE TDD cells. PrachRbReuseSwitch:If this switch is on, the PUSCH and PRACH transmissions can use the same resource. If this switch is off, the PUSCH and PRACH transmissions cannot use the same resource. This switch applies only to LTE TDD cells. ULFSSAlgoswitch:If this switch is off, uplink frequency-selective scheduling is disabled. If this switch is on, uplink frequency-selective scheduling is enabled. This switch is invalid if the HighSpeedFlag parameter in the Cell MO is set to HIGH_SPEED(High speed cell flag) or
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
ULTRA_HIGH_SPEED(Ultra high speed cell flag), that is, uplink frequency-selective scheduling is disabled in high speed and ultra high speed mobility conditions. This switch applies only to LTE TDD cells. SrSchDataAdptSw: Indicates whether to enable data volume adaption in SR scheduling. Data volume adaption in SR scheduling is enabled only when this option is selected. UlFssUserThdStSwitch: UlFssUserThdStSwitch: Indicates whether to enable the optimization policy on the UE number threshold for frequency selective scheduling. The optimization policy is enabled only when this option is selected. GUI Value Range: SpsSchSwitch(SpsSchSwitch), SinrAdjustSwitch(SinrAdjustSwitch), PreAllocationSwitch(PreAllocationSwitch), UlVmimoSwitch(UlVmimoSwitch), TtiBundlingSwitch(TtiBundlingSwitch), ImIcSwitch(ImIcSwitch), SmartPreAllocationSwitch(SmartPreAllocationSwitch), PuschDtxSwitch(PuschDtxSwitch), UlIblerAdjustSwitch(UlIblerAdjustSwitch), UlEnhancedFssSwitch(UlEnhancedFssSwitch), UlEnhancedSrSchSwitch(UlEnhancedSrSchSwitch), SchedulerCtrlPowerSwitch(SchedulerCtrlPowerSwitch), UlIicsAlgoSwitch(UlIicsAlgoSwitch), UlMinGbrSwitch(UlMinGbrSwitch), UlMbrCtrlSwitch(UlMbrCtrlSwitch), MbrUlSchSwitch(MbrUlSchSwitch), UeAmbrUlSchSwitch(UeAmbrUlSchSwitch), UlEnhancedDopplerSwitch(UlEnhancedDopplerSwitch), UlRaUserSchOptSw(UlRaUserSchOptSw), UlLast2RetransSchOptSwitch(UlLast2RetransSchOpt Switch), UlInterfFssSwitch(UlInterfFssSwitch), UlSmallRBSpectralEffOptSw(UlSmallRBSpectralEfficiencyOptSw), PuschUsePucchRbSwitch(PuschUsePucchRbSwitch), PuschDtxSchOptSwitch(PuschDtxSchOptSwitch), ULFSSAlgoSwitch(ULFSSAlgoSwitch), PrachRbReuseSwitch(PrachRbReuseSwitch), SrSchDataAdptSw(SrSchDataAdptSw), UlFssUserThdStSwitch(UlFssUserThdStSwitch) Unit: None Actual Value Range: SpsSchSwitch, SinrAdjustSwitch, PreAllocationSwitch, UlVmimoSwitch, TtiBundlingSwitch, ImIcSwitch, Issue 03 (2015-08-31)
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eRAN UL CoMP Feature Parameter Description
MO
Parame ter ID
MML Comma nd
Feature ID
10 Parameters
Feature Name
Description
SmartPreAllocationSwitch, PuschDtxSwitch, UlIblerAdjustSwitch, UlEnhancedFssSwitch, UlEnhancedSrSchSwitch, SchedulerCtrlPowerSwitch, UlIicsAlgoSwitch, UlMinGbrSwitch, UlMbrCtrlSwitch, MbrUlSchSwitch, UeAmbrUlSchSwitch, UlEnhancedDopplerSwitch, UlRaUserSchOptSw, UlLast2RetransSchOptSwitch, UlInterfFssSwitch, UlSmallRBSpectralEffOptSw, PuschUsePucchRbSwitch, PuschDtxSchOptSwitch, ULFSSAlgoSwitch, PrachRbReuseSwitch, SrSchDataAdptSw, UlFssUserThdStSwitch Default Value: SpsSchSwitch:Off, SinrAdjustSwitch:On, PreAllocationSwitch:On, UlVmimoSwitch:Off, TtiBundlingSwitch:Off, ImIcSwitch:Off, SmartPreAllocationSwitch:Off, PuschDtxSwitch:On, UlIblerAdjustSwitch:Off, UlEnhancedFssSwitch:On, UlEnhancedSrSchSwitch:Off, SchedulerCtrlPowerSwitch:Off, UlIicsAlgoSwitch:Off, UlMinGbrSwitch:Off, UlMbrCtrlSwitch:Off, MbrUlSchSwitch:Off, UeAmbrUlSchSwitch:Off, UlEnhancedDopplerSwitch:Off, UlRaUserSchOptSw:Off, UlLast2RetransSchOptSwitch:Off, UlInterfFssSwitch:Off, UlSmallRBSpectralEffOptSw:Off, PuschUsePucchRbSwitch:Off, PuschDtxSchOptSwitch:Off, ULFSSAlgoSwitch:On, PrachRbReuseSwitch:Off, SrSchDataAdptSw:On, UlFssUserThdStSwitch:Off
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eRAN UL CoMP Feature Parameter Description
11 Counters
11
Counters
Table 11-1 Counters Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526726737
L.ChMeas.PRB.UL .Used.Avg
Average number of used uplink PRBs
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None
Adaptive SFN/ SDMA
LTE: LBFD-002025 TDLBFD-002025 LOFD-070205 1526727412
L.ChMeas.PUSCH. MCS.0
Number of times MCS index 0 is scheduled on the PUSCH
Multi-mode: None
Basic Scheduling
GSM: None
Modulation: DL/UL QPSK, DL/UL 16QAM, DL 64QAM
UMTS: None LTE: LBFD-002025 LBFD-001005 TDLBFD-002025 TDLBFD-001005
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Basic Scheduling Modulation: DL/UL QPSK, DL/UL 16QAM, DL 64QAM
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eRAN UL CoMP Feature Parameter Description
11 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526727440
L.ChMeas.PUSCH. MCS.28
Number of times MCS index 28 is scheduled on the PUSCH
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None
Modulation: DL/UL QPSK, DL/UL 16QAM, DL 64QAM
LTE: LBFD-002025 TDLBFD-002025 LBFD-001005 TDLBFD-001005 LOFD-001006 TDLOFD-001006 1526727483
L.ChMeas.PRB.PU CCH.Avg
Average number of used PRBs over the PUCCH
Modulation: DL/UL QPSK, DL/UL 16QAM, DL 64QAM UL 64QAM UL 64QAM
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526728259
L.Thrp.bits.UL
Total uplink traffic volume for PDCP PDUs in a cell
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002008 TDLBFD-002008
Radio Bearer Management Radio Bearer Management Basic Scheduling Basic Scheduling
LBFD-002025 TDLBFD-002025 1526728260
L.Thrp.Time.UL
Total receive duration of uplink PDCP PDUs in a cell
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002008 TDLBFD-002008
Radio Bearer Management Radio Bearer Management Basic Scheduling Basic Scheduling
LBFD-002025 TDLBFD-002025
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eRAN UL CoMP Feature Parameter Description
11 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526728338
L.ULCoMP.User.A vg
Average number of UL CoMP UEs in a cell
Multi-mode: None
Intra-eNodeB UL CoMP
GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222 LOFD-070223
Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU Intra-eNodeB UL CoMP
TDLOFD-001066 1526728339
L.ULCoMP.User.M ax
Maximum number of UL CoMP UEs in a cell
Multi-mode: None GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222 LOFD-070223
Intra-eNodeB UL CoMP Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU Intra-eNodeB UL CoMP
TDLOFD-001066 1526728340
L.ULCoMP.RB
Average number of scheduled PRBs for UL CoMP
Multi-mode: None GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222 LOFD-070223
Intra-eNodeB UL CoMP Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU Intra-eNodeB UL CoMP
TDLOFD-001066 1526733173
L.ULCoMP.Hetnet CoMP.User.Avg
Average number of UEs selected for whom HetNet UL CoMP is performed in a cell
Multi-mode: None GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222
Intra-eNodeB UL CoMP Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU
LOFD-070223 1526733174
L.ULCoMP.Hetnet CoMP.User.Max
Maximum number of UEs selected for whom HetNet UL CoMP is performed in a cell
Multi-mode: None GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222
Intra-eNodeB UL CoMP Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU
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eRAN UL CoMP Feature Parameter Description
11 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526733175
L.ULCoMP.Hetnet CoMP.RB
Average number of scheduled RBs for HetNet UL CoMP in a cell
Multi-mode: None
Intra-eNodeB UL CoMP
GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222
Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU
LOFD-070223 1526733196
L.ChMeas.ULCoM PPhase2.PRB.Avg
Average number of scheduled PRBs for intra-BBU interBBP UL CoMP in a cell
Multi-mode: None GSM: None UMTS: None LTE: LOFD-070222
Intra-eNodeB UL CoMP Phase II Intra-eNodeB UL CoMP
TDLOFD-001066 1526733197
L.ChMeas.ULOver BBUCoMP.PRB.Av g
Average number of scheduled PRBs for inter-BBU UL CoMP in a cell
Multi-mode: None GSM: None UMTS: None LTE: LOFD-070223
UL CoMP based on Coordinated BBU UL CoMP based on Coordinated BBU
TDLOFD-081207 1526737762
1526737763
1526737816
L.ChMeas.ULRelax edBHCoMP.PRB.A vg
L.ULCoMP.ULRela xedBHCoMP.User. Avg
L.ChMeas. 3SectorULCoMP.P RB.Avg
Average number of PRBs scheduled for relaxed-backhaulbased UL CoMP in a cell
Multi-mode: None
Average number of UEs selected for whom UL CoMP based on relaxed backhaul is performed in a cell
Multi-mode: None
Average number of scheduled PRBs for 3-cell UL CoMP in a cell
Multi-mode: None
GSM: None
UL CoMP Based on Relaxed Backhaul
UMTS: None LTE: LOFD-081219
GSM: None
UL CoMP Based on Relaxed Backhaul
UMTS: None LTE: LOFD-081219
GSM: None UMTS: None LTE: LOFD-001066 LOFD-070222 LOFD-070223
Intra-eNodeB UL CoMP Intra-eNodeB UL CoMP Phase II UL CoMP based on Coordinated BBU UL CoMP Based on Relaxed Backhaul
LOFD-081219
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eRAN UL CoMP Feature Parameter Description
11 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1542455420
VS.IPPM.Rtt.Mean s
Average RTT on the IP PM
Multi-mode: None
IP Performance Monitor
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GSM: GBFD-118607 UMTS: WRFD-050402
IP Transmission Introduction on Iub Interface
LTE: LOFD-00301201
IP Performance Monitoring
TDLOFD-0030120 1
IP Performance Monitoring
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12 Glossary
12
Glossary
For the acronyms, abbreviations, terms, and definitions, see Glossary.
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eRAN UL CoMP Feature Parameter Description
13 Reference Documents
13
Reference Documents
1.
3GPP TR 36.819, "Coordinated multi-point operation for LTE physical layer aspects"
2.
MIMO Feature Parameter Description
3.
Receiver Technologies Feature Parameter Description
4.
ICIC Feature Parameter Description
5.
USU3900-based Multi-BBU Interconnection Feature Parameter Description
6.
USU3910-based Multi-BBU Interconnection Feature Parameter Description
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