eRAN
DL CoMP Feature Parameter Description Issue
02
Date
2017-04-27
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2017. 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.
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Contents
Contents 1 About This This Document........... Document................................. ............................................ ............................................. ............................................. .................................... .............. 1 1.1 Scope........................................................................................................... Scope....... ....................................................................................................................................................................... ................................................................... 1 1.2 Disclaimer Disclaimer for Trial Features..........................................................................................................................................1 1.3 Intended Audience..........................................................................................................................................................2 1.4 Change History................................................................................................... H istory............................................................................................................................................................... ............................................................ 2 1.5 Differences Differences Between eNodeB Types.............................................................................................................................. Types.............................................................................................................................. 3
2 Overview.................. Overview......................................... ............................................. ............................................ ............................................ ............................................ .............................. ........ 4 2.1 Introduction................................................................................................. Introduction.................................................................................................................................................................... ................................................................... 4 2.2 Benefits...........................................................................................................................................................................6 Benefits...........................................................................................................................................................................6 2.3 Related Concepts................................................................................................................................................ Concepts............................................................................................................................................................ ............ 6 2.4 Architecture.................................................................................................. Architecture.................................................................................................................................................................... .................................................................. 6
3 Technical Technical Description........ Description.............................. ............................................ ............................................. ............................................. ........................................8 ..................8 3.1 Selection of a Coordinating Cell Cell Set.............................................................................................................................. Set.............................................................................................................................. 9 3.2 Selection of CoMP UEs and Coordinating Cells............................................................................................................9 3.2.1 Entering the Entering the DPS Mode...............................................................................................................................................9 3.2.2 Entering the Entering the JT Mode.................................................................................................. Mode................................................................................................................................................ .............................................. 11 3.2.3 Exiting the DPS or JT Mode......................................................................................................................................11 3.3 Multi-Cell Coordinated Multi-Cell Coordinated Transmission....................................................................................................... Transmission.......................................................................................................................... ................... 12
4 Related Features........ Features.............................. ............................................ ............................................. ............................................. ............................................ .......................... ....13 13 5 Network Impact........... Impact.................................. ............................................. ............................................ ............................................ ............................................ ........................ 16 6 Engineering Engineering Guidelines............ Guidelines.................................. ............................................ ............................................ ............................................ ............................... ......... 17 6.1 When to Use................................................................................................. U se................................................................................................................................................................. ................................................................ 17 6.2 Required Information................................................................................ I nformation................................................................................................................................................... ................................................................... 17 6.3 Planning............................................................................................... Planning........................................................................................................................................................................ ......................................................................... 21 6.3.1 RF Planning..................................................................................... Plan ning............................................................................................................................................................... .......................................................................... 21 6.3.2 Network Planning...................................................................................................................................................... Planning...................................................................................................................................................... 21 6.3.3 Hardwar e Planning...................................................................................................... Planning.................................................................................................................................................... .............................................. 21 6.4 Deployment............................................................... Deployment.................................................................................................................................................................. ................................................................................................... 21 6.4.1 Process....................................................................................................................................................................... Process....................................................................................................................................................................... 21 6.4.2 Requirements............................................................................................................................................................. Requirements............................................................................................................................................................. 22 6.4.3 Precautions............................................................................................. Precautions.................................................................................................................................................................22 ....................................................................22 Issue 02 (2017-04-27)
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6.4.4 Hardware Adjustment................................................................................................................................................22 6.4.5 Data Preparation and Feature Activation........................................................................... Activation...................................................................................................................22 ........................................22 6.4.5.1 Data Preparation....................................................................................................................... Preparation..................................................................................................................................................... .............................. 22 6.4.5.2 Using the CME....................................................................................................................................................... CME....................................................................................................................................................... 26 6.4.5.3 Using MML Commands.........................................................................................................................................26 6.4.5.4 MML Command Examples......................................................................................................................... Examples.................................................................................................................................... ........... 27 6.4.6 Activation Observation..............................................................................................................................................27 6.4.7 Deactivation............................................................................................................................................................... Deactivation...............................................................................................................................................................27 27 6.4.7.1 Using the CME....................................................................................................................................................... CME....................................................................................................................................................... 28 6.4.7.2 Using MML Commands.........................................................................................................................................28 6.4.7.3 MML Command Examples......................................................................................................................... Examples.................................................................................................................................... ........... 28 6.4.8 Reconfiguration........................................................................................................... Reconfiguration......................................................................................................................................................... .............................................. 28 6.5 Performance Monitoring.......................................................................................... Monitoring...............................................................................................................................................28 .....................................................28 6.6 Parameter Optimization................................................................................................................................................ Optimization................................................................................................................................................ 30 6.7 Possible Issues...................................................................................................................................................... Issues.............................................................................................................................................................. ........ 30
7 Parameters..... Parameters............................ ............................................. ............................................ ............................................ ............................................ .......................................32 .................32 8 Counters.......... Counters................................ ............................................ ............................................ ............................................ ............................................ ...................................... ................ 44 9 Glossary......... Glossary................................ ............................................. ............................................ ............................................ ............................................ .......................................52 .................52 10 Reference Documents.......... Documents................................ ............................................. ............................................. ............................................ .................................. ............ 53
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eRAN DL CoMP Feature Parameter Description
1 About This Document
1
About This Document
1.1 Scope This document describes LAOFD-120201 DL CoMP (Trial), including its technical principles, related features, features, network impact, impact, and engineering guidelines. guidelines. Any parameters, alarms, counters, or managed objects (MOs) described herein apply only to the corresponding software release. For future software releases, refer to the corresponding updated product documentation. 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 Disclaimer for Trial Features Trial features are features that are not yet ready for full commercial release for certain reasons. For example, the industry chain (terminals/CN) may not be sufficiently compatible. However, However, these features can still be used for testing t esting purposes or commercial network trials. Anyone who desires to use the trial features shall contact Huawei and enter into a memorandum of understanding (MoU) with Huawei prior to an official application of such trial features. Trial features are not for sale in the current version but customers may try them for free. Customers acknowledge and undertake that trial features may have a certain degree of risk due to absence of commercial testing. Before using them, customers shall fully understand not only the expected benefits of such trial features but also the possible impact they may exert on the network. In addition, customers acknowledge and undertake that since trial features are free, Huawei is not liable for any trial feature malfunctions or any losses incurred by using the trial features. Huawei does not promise that problems with trial features will be resolved in the current version. Huawei reserves the rights to convert trial features into commercial features in later R/C versions. If trial features are converted into commercial features in a later version, customers shall pay a licensing fee to obtain the relevant licenses prior to using the said commercial features. If a customer fails to purchase such a license, the trial feature(s) will be invalidated automatically when the product is upgraded.
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eRAN DL CoMP Feature Parameter Description
1 About This Document
1.3 Intended Audience This document is intended for personnel who: l l
Need to understand the features described described herein Work with Huawei products
1.4 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 affected by editorial changes. Editorial change does not specify the affected entities.
eRAN12.1 02 (2017-04-27) This issue includes the following changes.
Change Type
Change Description
Parameter Change
Feature change
None
None
Editorial change
Revised descriptions in 6.5 Performance Monitoring.
None
eRAN12.1 01 (2017-03-08) This issue includes the following changes.
Change Type
Change Description
Parameter Change
Feature change
None
None
Editorial change
Revised descriptions in 6.4.2 Requirements.
None
eRAN12.1 Draft A (2016-12-30) This document is created for eRAN12.1. Issue 02 (2017-04-27)
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eRAN DL CoMP Feature Parameter Description
1 About This Document
1.5 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
LAOFD-12020 1
DL CoMP (Trial)
Yes
No
Yes
Feature Implementation in Macro and LampSite eNodeBs None
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eRAN DL CoMP Feature Parameter Description
2 Overview
2
Overview
2.1 Introduction In 3GPP releases earlier than 3GPP Release 11, physical downlink shared channel (PDSCH) data of LTE cell c ell edge users users (CEUs) cannot be sent with the help of adjacent cells to improve the performance of CEUs. This gain can be achieved by downlink coordinated multipoint transmission (DL CoMP) based on TM10 introduced in 3GPP Release 11. DL CoMP enables multiple cells to cooperate to perform downlink transmission. DL CoMP is implemented based on TM10 introduced in 3GPP Release 11. Multiple cells cooperate based on ideal backhaul (intra-BBU backhaul or backhaul based on multi-BBU interconnection through USUs) to process and transmit PDSCH data by using antennas of neighboring cells. USU refers to universal switching unit. Downlink transmission by multiple cells adopts two modes, dynamic point selection (DPS) and joint transmission (JT), to improve hotspot cell capacity or CEU performance. eNodeBs can adaptively select an appropriate transmission mode based on t he cell load and channel quality. quality.
DPS In DPS mode, the coordinating cell sends PDSCH data to the UE to increase the hotspot cell capacity, capacity, CEU throughput, and average UE throughput. Figure 2-1 illustrates the DPS mode, in which PDCCH data of the UE is sent by cell 1 (the serving cell), and PDSCH data is sent by cell 1 to cell 2 (the coordinating cell) and then sent by cell 2 to the UE.
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Figure 2-1 DPS
JT In JT mode, both the serving cell and coordinating cell transmit PDSCH data to improve the throughput of CEUs with a low signal to interference plus noise ratio (SINR). Figure 2-2 illustrates the JT mode, in which l
PDCCH data of the UE is sent by cell 1 (the serving cell), and PDSCH data is sent by cell 1 to cell 2 (the coordinating cell). Cell 1 and cell 2 allocate the same RBs to send PDSCH data to the UE.
l
The UE receives the same PDSCH data from cell 1 and cell 2 simultaneously. simultaneously.
Figure 2-2 JT
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2.2 Benefits DL CoMP improves the downlink throughput and user experience of CEUs. l
DPS increases the capacity of hotspot cells and improves the CEU throughput and average UE throughput when the network load is heavy and imbalanced.
l
JT improves the throughput of CEUs with a low SINR when the network load is light.
2.3 Related Concepts Table 2-1 2 -1 lists the concepts related to DL CoMP. Table 2-1 2 -1 Related concepts
Concept
Definition
Coordinating cell set of the serving cell
A set of 10 neighboring cells t hat cause the strongest interference to the serving cell as measured by the eNodeB
Serving sell
A serving ce cell is is th the cell th that UE UEs ac access.
DPS UE
The eNodeB uses algorithms to determine whether a UE meets the DPS threshold conditions. The UE that meets the DPS threshold conditions is a DPS UE.
JT UE
The eNodeB uses algorithms to determine whether a UE meets the JT threshold conditions. The UE that meets the JT threshold conditions is a JT UE.
Coordinating cell of a DPS or JT UE
The eNodeB identifies the coordinating cells for a DPS or JT UE based on the event A3 A3 measurement report report sent by the DPS or JT UE. The coordinating cells of a UE belong to the coordinating cell set of the serving cell of the UE.
eX2 eX2 int inter erfa face ce
When When USUUSU-ba base sed d mul multi ti-B -BBU BU inte interc rcon onne nect ctio ion n is is use used, d, the the eX2 eX2 interface is responsible for service coordination between eNodeBs.
2.4 Architecture DL CoMP is implemented through the cooperation of the U2000, USU, eNodeB, and UE. Figure 2-3 to Figure 2-5 show the networking diagrams. If DL CoMP is performed among BBUs, time synchronization is required across the entire network. Networking diagram diagram for intra-BBU DL CoMP (macro-macro/macro-micro (macro-macro/macro-micro Figure 2-3 Networking networking)
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Figure 2-4 Networking diagram for inter-BBU DL CoMP (macro-macro networking)
Figure 2-5 Networking diagram for inter-BBU DL CoMP (macro-micro networking)
Table 2-2 2 -2 describes the functions of the network elements (NEs) shown in Figure 2-3 to Figure 2-5. Table 2-2 2 -2 NE functions
NE
Function
U200 U2000 0
Used Used for for para parame mete terr conf config igur urat atio ion n and and perf perfor orma manc ncee moni monito tori ring ng..
eNodeB
l
Configures channel state information-reference signal (CSI-RS) resources of a cell.
l
Maintains and manages the coordinating cell set of a cell.
l
Determines whether a UE is a DPS or JT UE and configures TM10 for the UE.
l
Performs coordinated transmission based on DPS or JT UE attributes.
l
Reports air interface measurement information, including the reference signal received power (RSRP) and CSI.
l
Receives PDSCH data according to the DCI format 2D indication.
UE
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3
Technical Description
Figure 3-1 shows the DL CoMP process, including selection of a coordinating cell set, selection of CoMP UEs and coordinating cells, and multi-cell coordinated transmission. Figure 3-1 DL CoMP process
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3.1 Selection of a Coordinating Cell Set The eNodeB selects a coordinating cell set as follows: 1.
After DL CoMP CoMP is enable enabled, d, the eNodeB eNodeB selects selects a coordinat coordinating ing cell cell set for for the serving serving cell based on the neighboring cell information reported by UEs. The DL CoMP algorithm switch settings vary with networking scenarios.
Networki Parameter Setting ng Scenario HomNet
The FDDHomNetDlCompSwitch(FDDHomNetDlCompSwitch) DlCompSwitch parameter is check box under the CellAlgoSwitch. DlCompSwitch selected.
HetNet
The FDDHetNetDlCompSwitch(FDDHetNetDlCompSwitch) check DlCompSwitch parameter is selected. box under the CellAlgoSwitch. DlCompSwitch
HomNet and HetNet
Both of the preceding check boxes are selected.
2.
DlRsrpAutoNCellMeasSwitch parameter to The user sets the NCellDlRsrpMeasPara. DlRsrpAutoNCellMeasSwitch parameter to a ON(On) and the NCellDlRsrpMeasPara. NCellDlRsrpMeasA3Offset NCellDlRsrpMeasA3Offset parameter desired value.
3.
By collecti collecting ng informat information ion on neighborin neighboring g cells cells that meet event event A3 A3 reporting reporting conditions conditions within a certain period, the eNodeB selects 10 neighboring cells that cause the highest interference to the serving cell as the coordinating cell set for DL CoMP. CoMP. If micro cells exist, the eNodeB preferentially selects micro cells (6 at most), and then selects macro cells to form a coordinating cell set.
3.2 Selection of CoMP UEs and Coordinating Cells After selecting the DPS or JT serving cell, the eNodeB selects coordinating cells and CoMP UEs based on the preset load thresholds.
3.2.1 Entering the DPS Mode The process for a UE to enter the DPS mode is as follows: 1.
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DPS DPS serv servin ing g cell cell sele select ctio ion n is trig trigge gere red. d.
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Figure 3-2 Triggering of DPS/JT serving cell selection
As shown in Figure 3-2, when the PRB usage of the t he serving cell is greater than the DpsServingCellDlPrbThd parameter threshold specified by the CellDlCompAlgo. DpsServingCellDlPrbThd parameter and the serving cell is a macro cell, the eNodeB selects the serving cell as the DPS serving cell. 2.
The eNodeB eNodeB selects selects the the cells cells with the stronge strongest st RSRP RSRP in the the coordina coordinating ting cell cell set set as coordinating cells. If the RSRP value of a neighboring cell minus that of the serving cell of a UE is greater than or equal to the coordinating cell RSRP threshold plus the coordinating cell RSRP offset, the UE reports event A3. If the neighboring cell that meets the event A3 reporting conditions belongs to the coordinating cell set, it is selected as a coordinating cell.
–
In HomNet networking scenarios, the coordinating cell RSRP threshold is specified by the CellDlCompAlgo. HomnetDpsCoCellRsrpThd parameter, and only the HomnetDpsCoCellRsrpThd parameter, macro cells with the strongest RSRP in the coordinating cell set can be selected as coordinating cells.
–
In HetNet scenarios, the coordinating cell RSRP threshold is specified by the CellDlCompAlgo. HetnetDpsCoCellRsrpThd HetnetDpsCoCellRsrpThd parameter, parameter, and only the micro cells with the strongest RSRP in the coordinating cell set can be selected as coordinating cells.
–
In HomNet and HetNet hybrid networking scenarios, the micro cells with the strongest RSRP in the coordinating cell set are preferentially selected as coordinating cells. NOTE
The system automatically configures the coordinating cell RSRP offset to prevent ping-pong configuration of TM10 for UEs.
3.
The The eNo eNode deB B sel selec ects ts DPS DPS UEs UEs.. If the coordinating cells selected in 2 meet all of the following conditions, the eNodeB selects the UEs as DPS UEs and configures the TM10 mode for them.
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–
The PRB usage of the serving cell minus the PRB usage of a coordinating cell is DpsLoadDiffThd parameter. greater than the value of the CellDlCompAlgo. DpsLoadDiffThd parameter.
–
The number of UEs in RRC_CONNECTED mode in a coordinating cell divided by the number of UEs in RRC_CONNECTED mode in the serving cell is less than or Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
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DpsCoCellUserRatioThd parameter. equal to the value of the CellDlCompAlgo. DpsCoCellUserRatioThd parameter. The selected DPS UE is regarded as a UE in the coordinating cell.
exists between coordinating cells and the serving cell. cell. – No PCI mod 3 conflict exists
3.2.2 Entering the JT Mode The process for a UE to enter the JT mode is as follows: 1.
JT ser servi ving ng cel celll sele select ctio ion n is tri trigg gger ered ed.. As shown in Figure 3-2, when the PRB usage of the serving cell is less than or equal to JtServingCellDlPrbThd parameter, the threshold specified by the CellDlCompAlgo. JtServingCellDlPrbThd parameter, the eNodeB selects the serving cell as the JT serving cell.
2.
The eNodeB eNodeB selects selects the the cells cells with the stronge strongest st RSRP RSRP in the the coordina coordinating ting cell cell set set as coordinating cells. If the RSRP value of the neighboring cell minus that of the serving cell of a UE is greater JtCoCellRsrpThd parameter than or equal to the value of the CellDlCompAlgo. JtCoCellRsrpThd parameter plus the coordinating cell RSRP offset, the UE reports event A3. If the neighboring cell that meets the event A3 reporting conditions belongs to the coordinating cell set, it is selected as a coordinating cell.
–
In HomNet networking scenarios, only the cells of the same type as the serving cell and with the strongest RSRP in the coordinating cell set can be selected as coordinating cells.
–
In HetNet networking scenarios, when the serving cell is a macro cell, only the micro cells with the strongest RSRP in the coordinating cell set can be selected as coordinating cells.
–
In HomNet and HetNet hybrid networking scenarios, the cells with the strongest RSRP in the coordinating cell set are preferentially selected as coordinating cells. However, However, when the serving cell is a micro cell, only micro cells can be selected as coordinating cells. NOTE
The system automatically configures the coordinating cell RSRP offset to prevent ping-pong configuration of TM10 for UEs.
3.
The The eNo eNode deB B sel selec ects ts JT UEs. UEs. If the coordinating cells selected in 2 meet both of the following conditions, the eNodeB selects the UEs as JT UEs and configures the TM10 mode for them.
–
The PRB usage of a coordinating cell is less than the value of the CellDlCompAlgo. JtCoCellDlPrbThd JtCoCellDlPrbThd parameter.
–
The spectral efficiency for the CQIs reported by the UEs is less than that for CQIs 5 and 8 in the case of single-codeword transmission. For details about CQIs 5 and 8, see Table 7.2.3-1 4-bit CQI Table and Table 7.2.3-2 4-bit CQI Table 2 in section 7.2.3 "Channel Quality Indicator (CQI) definition" in 3GPP TS 36.213 V12.9.1.
3.2.3 Exiting the DPS or JT Mode If a DPS or JT UE reports exit event A3, the eNodeB disables TM10 configuration for the UE and configures the UE as a common user.
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3.3 Multi-Cell Coordinated Transmission After the eNodeB determines the DPS or JT serving cell based on t he downlink PRB usage threshold, the transmission mode used by the serving cell is also determined. As shown in Figure 3-3, the eNodeB delivers two sets of CSI measurement configurations to a CoMP UE for measuring channel state information (CSI), including precoding matrix indication (PMI), rank indication (RI), and CQI, of the serving and coordinating cells, respectively. respectively. The eNodeB transmits data in DPS or JT mode based on the CSI measurement results reported by the UE and the scheduling information of t he serving and coordinating cells. Figure 3-3 CSI measurement configuration
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eRAN DL CoMP Feature Parameter Description
4 Related Features
4
Related Features
Prerequisite Features Feature ID
Feature Name
Description
LBFD LBFD-0 -003 0300 0050 503 3
Sync Synchr hron oniz izat atio ion n with with GPS
LOFD LOFD-0 -003 0301 0130 302 2
IEEE IEEE15 1588 88 V2 V2 Cloc Clock k Synchronization
If DL CoMP is performed among BBUs, time synchronization is required across the entire network. Therefore, inter-BBU DL CoMP requires either of these features.
Mutually Exclusive Features
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Feature ID
Feature Name
Description
LBFD-070106
PDSCH Ef Efficiency Improvement
Adaptive CEU power allocation is ineffective to DL CoMP UEs.
LOF LOFD-00 D-0010 1007 07
High igh Spe Speeed Mo Mobili bility ty
LOFD-001008
Ultra High Sp Speed Mobility
In hig high h spe speeed mob mobil ilit ity y sc scenar enario ios, s, the the cha chann nneel conditions and load status of a cell change so rapidly that DL CoMP cannot respond promptly. promptly.
LOFD-001009
Extended Ce Cell Ac Access Radius
LOFD-001031
Extended CP
LAOF LAOFDD-08 0812 1233 33
Dyna Dynami micc TDM TDM eICI eICIC C
LAOFD-081234
FeICIC
In DL CoMP, UEs need to receive data from different cells simultaneously. Therefore, DL CoMP does not apply to extended coverage scenarios. Both Both DL CoMP CoMP and and enh enhan ance ced d int inter er-c -cel elll interference coordination (eICIC) can offer macro-micro offload gains by using cell range expansion (CRE). Because CEUs have been handed over to the micro cell, enabling enabling both DL CoMP and eICIC eICIC will yield negative gains.
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4 Related Features
Feature ID
Feature Name
Description
LOFD-060201
Adaptive Int Inter-Cell Interference Coordination
Adaptive inter-cell interference coordination (ICIC) is based on the eCoordinator architecture. DL CoMP cannot obtain frequency bands of neighboring cells. In this case, DL CoMP cannot coordinate UEs to neighboring cells for scheduling.
LAO LAOFD-1 FD-11 11204 1204
Adapt daptiv ivee SFN SFN/SDM /SDMA A with TM10 (Trial)
The CSI-RS pattern of adaptive SFN/SDMA is inconsistent with that of DL CoMP. CoMP.
LEOFD-111305
Virtual 4T4R
DL CoMP is temporarily not supported in virtual 4T4R scenarios.
Feature ID
Feature/Function Name
Description
LOFD-001016
VoIP Semi-persistent Scheduling
Resource conflicts may occur between semi persistent scheduling and DL DL CoMP coordinating cell scheduling. Therefore, DL CoMP coordinating cell scheduling is not performed within the TTI TTI in which semi persistent scheduling is effective. effective.
LOFD-002005
Mobility Robust Optimization (MRO)
MRO may affect the optimal RSRP threshold setting of coordinating cells in DL CoMP. CoMP. As a result, the cell-edge throughput across the entire network cannot reach the optimal level that DL CoMP can achieve.
LBFD-060103
Enhanced DL DL Frequency Selective Scheduling
Frequency-selective Frequency-selective scheduling can be performed for DL CoMP UEs only in the serving cell.
LBFD-002017
DRX
LOF LOFD-00 D-001 110501 0501
Dyna ynamic mic DRX DRX
DL CoMP may fail to take effect during coordinating cell scheduling in the DRX sleep time. Therefore, the optimal DL CoMP performance cannot cannot be achieved.
LOF LOFD-00 D-0010 1070 70
Symb ymbol Powe ower Sa Saving ving
When When both both DL Co CoMP and and enh enhaanced nced symb symbo ol power saving are enabled, enabled, enhanced symbol power saving is not triggered triggered during DL CoMP coordinating cell scheduling.
LAOFD-110203
ePDCCH (Trial)
When both DL CoMP and ePDCCH are enabled, a UE configured with ePDCCH cannot be selected as a CoMP UE. As a result, the optimal DL CoMP performance cannot be achieved.
Impacted Features
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4 Related Features
Feature ID
Feature/Function Name
Description
LBFD-002028
Emergency Call
UEs making emergency calls cannot be selected as CoMP UEs. As a result, the optimal DL CoMP performance cannot be achieved.
N/A
Carrier aggregation aggregation (CA)
For DL CoMP, TM10 is configured only in the PCell, not in t he SCell. Therefore, only the data in the PCell can be scheduled in the coordinating cell.
LOFD-070208
Coordinated Scheduling based Power Control
l
DL CoMP can be enabled when the CellCSPCPara.CellCspcSwitch CellCSPCPara.CellCspcSwitch parameter is set to ON(On), ON(On), and coordinated scheduling-based power control (CSPC) takes effect preferentially. preferentially. If CSPC has taken effect in a cell, DL CoMP UEs are not scheduled in coordinating cells.
l
DL CoMP cannot be enabled when the CellCSPCPara.CelleCspcSwitch CellCSPCPara.CelleCspcSwitch parameter is set to ON(On).
LOFD-003029
LOFD-070205
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SFN
Adaptive SFN/SDMA
l
In single frequency network (SFN) scenarios, if antennas of physical cells are configured in mixed mode, DL CoMP does not function between SFN cells.
l
In inter-BBU SFN scenarios, SFN cells do not support DL CoMP.
l
DL CoMP and adaptive SFN/SDMA can be enabled at the same same time. However, However, only the joint scheduling mode can be used for CoMP UEs in coordinating cells because no RSRP information about RRUs serving neighboring cells is available and UE attributes cannot be determined.
l
DL CoMP cannot be enabled when adaptive SFN/SDMA in TM9 is enabled.
l
In SFN scenarios, if antennas of physical cells are configured in mixed mode, DL CoMP does not function between SFN cells.
l
In inter-BBU SFN scenarios, SFN cells do not support DL CoMP.
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5 Network Impact
5
Network Impact
System Capacity DL CoMP is implemented using TM10. CSI-RSs need to be configured (in the CellCsiRsParaCfg MO) in cells when DL CoMP is enabled. However, CSI-RSs will result in a loss of system capacity. The more REs occupied by CSI-RSs indicate the shorter subframe period and greater loss.
Network Performance DL CoMP has the following impact on network performance: l
When DPS takes effect, PDSCH data of CEUs in the heavily loaded serving cell are offloaded to coordinating cells. In this way, way, more resources are available for UEs in the serving cell, and the user-perceived downlink throughput in the serving cell increases. If the increase of resources for DPS UEs in the lightly loaded coordinating cells cannot compensate for the loss of channel quality deterioration, the user-perceived user-perceived downlink throughput of the DPS UEs decreases.
l
HomNet networking: When the PRB usage of the heavily loaded cell is 60%, DL CoMP increases the CEU throughput by 5% to 10% and the average UE throughput by up to 5%.
l
HetNet networking: When a macro cell includes four micro cells and the PRB usage of the macro cell is 60%, DL CoMP increases the CEU throughput by about 20% and the average UE throughput by about 10%.
l
When the PRB usage of a cell is 10%, DL CoMP increases the throughput of JT UEs by about 10%. The CEU throughput increase depends on the ratio of JT UEs to CEUs. If both the DL CoMP and CSI-RS CSI-RS switches are turned on when there are a few JT UEs, UEs, CSI-RS subframe configuration will decrease the average UE throughput.
l
DL CoMP uses more PRB resources to increase the average PRB usage, increasing interference of neighboring cells. In this case, the measured CQI value and the proportion of rank 2 of CEUs may decrease slightly. slightly.
l
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When the UnCfgCsiRsUEDeOrderSchSwitch(UnCfgCsiRsUEDeOrderSchSwitch) check box under the CellDlschAlgo.CsiRsSfSchStrSwitch parameter is cleared, UEs not supporting TM9 or TM10 are not scheduled in CSI-RS subframes. The perceived throughput of such UEs will decrease by 0% to 5%. When this check box is selected, UEs not supporting TM9 or TM10 can be scheduled in CSI-RS subframes by using lower MCS indexes. The perceived throughput of such UEs will increase by 0% to 3%. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
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6 Engineering Guidelines
6
Engineering Guidelines
6.1 When to Use You are advised to enable DL CoMP when all of the following conditions are met: l
The average inter-RRU distance is less than 500 m in densely populated urban areas.
l
The average downlink PRB usage of hotspot cells is greater than 40% in heavy-load scenarios. This condition is more easily met in macro-micro networking scenarios. scenarios.
l
The average downlink PRB usage of cells is less than 20% in light-load scenarios.
l
Most UEs move at a speed lower than 10 km/h.
l
The penetration rate of TM10-capable UEs exceeds 70%.
6.2 Required Information To accurately evaluate whether the conditions for enabling DL CoMP are met, collect the following information before feature deployment: l
Penetration rate of TM10-capable UEs Check whether UEs on the network support TM10 based on the supportedCSIProcr11 supportedCSIProcr11 field in the external CHR event PRIVATE_UE_CAPABILITY_INFORMATION and evaluate the penetration rate of TM10-capable UEs.
l
l
Engineering parameters of cells
–
Frequency and bandwidth configurations of cells
–
Inter-site distance and longitude and latitude of each site
LTE network load, interference, and coverage performance NOTE
Among the following listed counters, counters related to CEUs are available only when the BasedA3EdgeUserSwitch(BasedA3EdgeUserSwitch) check box under the CellCounterParaGroup.CellCounterAlgoSwitch parameter is selected. CEUs can be identified EdgeUserA3Offset parameter. based on the the CellCounterParaGroup. EdgeUserA3Offset parameter. CEUs with weak coverage EdgeUserServRSRPThd parameter. can be identified based on the CellCounterParaGroup. EdgeUserServRSRPThd parameter. Before activating DL CoMP, run the following command: MOD CELLCOUNTERPARAGROUP:LocalCellId=0, CellCounterAlgoSwitch=BasedA3EdgeUserSwitch-1,
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EdgeUserA3Offset=-6;
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indicated by the counters listed in Table 6-1 and Table 6-2. – Network load is indicated Table 6-1 Counters related to the number of users in a cell
Counter ID
Counter Name
Description
152672737 8
L.Traffic.User.Avg
Average number of users in a cell
152672737 9
L.Traffic.User.Max
Maximum number of users in a cell
152672896 9
L.Traffic.ActiveUser.DL.Avg
Average number of active users in the downlink
152672897 0
L.Traffic.ActiveUser.DL.Max
Maximum number of active users in the downlink
152672897 5
L.Traffic.ActiveUser.Avg
Average number of active users
152672897 6
L.Traffic.ActiveUser.Max
Maximum number of active users
Table 6-2 Counters related to the average number of PRBs used in the downlink
Counter ID
Counter Name
Description
152672674 0
L.ChMeas.PRB.DL.Used.Avg
Average number of used downlink PRBs
152674176 7
L.ChMeas.PRB.PDSCH.Avg.Border UE
Average number of PDSCH PRBs occupied by CEUs in a cell
interference and coverage coverage performance are indicated by the counters listed – Network interference 6 -3 to Table 6-8. in Table 6-3 Table 6-3 Counters related to the number of CEUs in a cell
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Counter ID
Counter Name
Description
152674188 8
L.Traffic.User.BorderUE.Avg
Average number of CEUs in a cell
152674188 9
L.Traffic.User.BorderUE.Max
Maximum number of CEUs in a cell
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Table 6-4 Counters related to the number of times each MCS index is selected for PDSCH scheduling
Counter ID
Counter Name
Description
152672744 4 to 152672747 5
L.ChMeas.PDSCH.MCS.0 to L.ChMeas.PDSCH.MCS.31
Number of times MCS index N index N ( ( N N = = 0 to 31) is selected for PDSCH scheduling
Table 6-5 Counters related to the number of times full bandwidth CQIs 0 to 15 are reported in a cell
Counter ID
Counter Name
Description
152672739 6 to 152672741 1
L.ChMeas.CQI.DL.0 to L.ChMeas.CQI.DL.15
Number of times full bandwidth CQI N CQI N ( ( N N = = 0 to 15) is reported over the air interface
152673771 0
L.ChMeas.CQI.DL.BorderUE.Total
Accumulated value of full bandwidth CQIs reported by CEUs
152673771 1
L.ChMeas.CQI.DL.BorderUE.Num
Number of times full bandwidth CQIs are reported by CEUs
Table 6-6 Counters related to the number of times ranks 1 to 4 are reported by UEs in a cell
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Counter ID
Counter Name
152673014 1
L.ChMeas.RI.Rank1
Number of times a UE UE reports rank 1
152673014 2
L.ChMeas.RI.Rank2
Number of times a UE UE reports rank 2
152673273 7
L.ChMeas.RI.Rank3
Number of times a UE UE reports rank 3
152673273 8
L.ChMeas.RI.Rank4
Number of times a UE UE reports rank 4
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Description
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Table 6-7 Counters related to the average downlink rate of UEs in a cell
Counter ID
Counter Name
Description
152672826 1
L.Thrp.bits.DL
Total volume of downlink data transmitted at the PDCP layer in a cell
152672899 7
L.Thrp.Time.Cell.DL.HighPrecision
Total duration of downlink data transmission in a cell (with the precision of 1 ms)
152672826 2
L.Thrp.Time.DL
Total duration of downlink data transmission at the PDCP layer in a cell
152672900 5
L.Thrp.bits.DL.LastTTI
Downlink traffic volume for PDCP SDUs sent in the last TTI before the buffer is empty
152672901 5
L.Thrp.Time.DL.RmvLastTTI
Data transmission duration except the last TTI before the downlink buffer is empty
Table 6-8 Counters related to the downlink rate of CEUs in a cell
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Counter ID
Counter Name
Description
152673775 5
L.Thrp.bits.DL.BorderUE
Total downlink traffic volume of PDCP SDUs for CEUs in a cell
152674176 0
L.Thrp.Time.DL.BorderUE
Total duration of sending data to CEUs in the downlink at the PDCP layer in a cell
152673775 8
L.Thrp.bits.DL.LastTTI.BorderUE
Downlink PDCP-layer traffic volume sent in the last TTI for CEUs before the buffer is empty in a cell
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Counter ID
Counter Name
152673775 9
L.Thrp.Time.DL.RmvLastTTI.Bord erUE
Description Data transmission duration for CEUs except the last TTI before the downlink buffer is empty
6.3 Planning 6.3.1 RF Planning N/A
6.3.2 Network Planning l
If inter-BBU DL CoMP is used, Cloud BB achieved by USU-based multi-BBU interconnection must be deployed in advance.
–
For details about Cloud BB networking, see Cloud BB Overview Feature Parameter Description. Description.
–
For details about the networking, cable connections, and time synchronization for USU3910-based multi-BBU interconnection, see USU3910-based Multi-BBU Interconnection Interconnection Feature Parameter Description. Description.
l
eNodeBs provide contiguous coverage with the same frequency and bandwidth. The cell bandwidth must be greater greater than or equal to 5 MHz. MHz.
l
If inter-BBU DL CoMP is used, time synchronization is required across the entire network. The time synchronization accuracy between all cells with DL CoMP to be enabled must be less than 3 μs, and GPS or IEEE1588 V2 synchronization can be used. For details about time synchronization, see Synchronization Synchronization Feature Parameter Description. Description.
6.3.3 Hardware Planning N/A
6.4 Deployment 6.4.1 Process The DL CoMP deployment process is as follows: 1.
Enable Enable automa automatic tic measu measureme rement nt of neighborin neighboring g cell cell downlin downlink k RSRP RSRP..
2.
Perform Perform time synchroniz synchronization ation configura configuration tion in Cloud Cloud BB scena scenarios. rios.
3.
Configure Configure the the parame parameters ters of the the cells cells for for which which DL DL CoMP CoMP is to be enabled. enabled.
4.
Turn urn on on the the DL CoMP CoMP swit switch ch..
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6.4.2 Requirements Other Features For details, see 4 Related Features.
Hardware l
Baseband processing unit: The LBBPc does not support this feature.
l
USU: A USU3910 is required when inter-BBU DL CoMP is to be enabled.
l
RRU: Low-power RRUs, such as mRRU3220E and mRRU3230E, which do not support 1T1R or 1T2R, are used for micro cells involved in DL CoMP. CoMP.
License None
Other Requirements This feature requires support from UEs. UEs must be compliant with 3GPP Release 11 or later and capable of TM10 multi-CSI measurement.
6.4.3 Precautions l
All cells with DL CoMP enabled must have the same DL CoMP configurations.
l
DL CoMP is implemented using TM10. CSI-RSs must be configured (in the CellCsiRsParaCfg MO) in all involved cells when DL CoMP is enabled.
6.4.4 Hardware Adjustment N/A
6.4.5 Data Preparation and Feature Activation 6.4.5.1 Data Preparation DL CoMP based on USU3910-based multi-BBU interconnection requires that eX2 links be configured. For parameters related to eX2 link configuration, see eX2 Self-Management Feature Parameter Parameter Description. Description. The following table describes the parameter that must be set in the CellAlgoSwitch MO to enable DL CoMP.
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Table 6-9 6 -9 Parameter in the CellAlgoSwitch MO
Parameter Name
Parameter ID
Downlink CoMP algorithms switch
CellAlgoSwitch. DlCom DlCom pSwitch
Setting Notes Select FDDHomNetDlCompSwitch(FDDHomNetDlCompSwitch) or FDDHetNetDlCompSwitch(FDDHetNetDlCompSwitch) or both under this parameter based on the actual actual networking scenarios.
The following table describes the parameters that must be set in the CellDlCompAlgo MO to configure the thresholds for DL CoMP. Table 6-10 6 -10 Parameters in the CellDlCompAlgo MO
Parameter Name
Parameter ID
Setting Notes
HetNet DPS Coordinating Cell RSRP Threshold
CellDlCompAlgo. Hetne Hetne tDpsCoCellRsrpThd
The value -12 (corresponding to -6 dB) is recommended.
HomNet DPS Coordinating Cell RSRP Threshold
CellDlCompAlgo. Hom Hom netDpsCoCellRsrpThd
The value -6 (corresponding to -3 dB) is recommended.
JT Coordinating Cell RSRP Threshold
CellDlCompAlgo. JtCo JtCo CellRsrpThd
The value -6 (corresponding to -3 dB) is recommended.
DPS Coordinating Cell User Ratio Threshold
CellDlCompAlgo. DpsC DpsC oCellUserRatioThd
A larger value of this parameter indicates more UEs in coordinating cells and smaller offload gains to the serving cell. A smaller value of this parameter indicates fewer UEs in coordinating cells and larger offload gains to the serving cell. The value 50 is recommended.
DPS Serving cell download PRB Threshold
CellDlCompAlgo. DpsS DpsS ervingCellDlPrbThd
A smaller value of this parameter indicates a lower threshold for a cell to be selected as a DPS serving cell, increasing the probability of negative DPS gains. A larger value of this parameter indicates a higher threshold for a cell to be selected as a DPS serving cell. In this case, DPS gains cannot be maximized. The value 40 is recommended.
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Parameter Name
Parameter ID
DPS Load Difference Threshold
CellDlCompAlgo. DpsL DpsL oadDiffThd
Setting Notes A larger value of this parameter indicates that more UEs can be transferred to a coordinating cell in an update interval, significantly improving the system throughput. However, However, it is possible that the eNodeB cannot select a proper neighboring cell if the value is too large. A smaller value of this parameter indicates indicates that fewer UEs UEs can be transferred to a coordinating cell in an update interval. In this case, the system throughput does not improve significantly. significantly. The value 20 is recommended.
JT Coordinating Cell DL PRB Threshold
CellDlCompAlgo. JtCo JtCo CellDlPrbThd
A smaller value of this parameter indicates a higher threshold for a cell to be selected as a coordinating cell for JT. In this case, JT gains cannot be maximized. A larger value of this parameter indicates a lower threshold for a cell to be selected as a coordinating cell for JT, JT, increasing the probability of negative JT gains. The value 20 is recommended.
JT Serving Cell DL PRB Threshold
CellDlCompAlgo. JtSer JtSer vingCellDlPrbThd
A smaller value of this parameter indicates a lower threshold for a cell to be selected as a JT serving cell, reducing the number of cells that perform JT. In this case, JT gains decrease. A larger value of this parameter indicates a higher threshold for selecting a JT serving cell, increasing interference caused by JT and interference interference to neighboring cells. In this case, the system throughput is affected. The value 20 is recommended.
The following table describes the parameters that must be set in the NCellDlRsrpMeasPara MO for coordinating cell set measurement.
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Table 6-11 Parameters in the NCellDlRsrpMeasPara NCellDlRsrpMeasPara MO
Parameter Name
Parameter ID
Setting Notes
DL RSRP Auto NCell Measurement Switch
NCellDlRsrpMeasPara. DlRsrpAutoNCell DlRsrpAutoNCell MeasSwitch
This parameter specifies whether the local cell supports automatic neighboring cell RSRP measurement. When DL CoMP is enabled, this parameter must be set set to ON(On) .
DL RSRP NCell Measurement A3 Offset
NCellDlRsrpMeasPara. NCellDlRsrpMeas NCellDlRsrpMeas A3Offset
This parameter indicates the offset for the automatic neighboring cell RSRP measurement event A3. This offset specifies the difference between the signal quality quality of a neighboring cell and that of the serving cell to trigger a downlink RSRP measurement event. The value -12 (corresponding to -6 dB) is recommended.
The following table describes the parameters that must be set in the CellCsiRsParaCfg MO for the CSI-RS. Table 6-12 6 -12 Parameters in the CellCsiRsParaCfg MO
Parameter Name CSI-RS Switch
Parameter ID
Setting Notes
CellCsiRsParaCfg.CsiR CellCsiRsParaCfg.CsiR sSwitch
Before DL CoMP is enabled, set this parameter to FIXED_CFG(Fixed configure) or ADAPTIVE_CFG(ADAPTIVE_ CFG). If a certain TM10-capable UE penetration rate is required, required, set this parameter to FIXED_CFG(Fixed configure) . Otherwise, it is recommended that this parameter be set to ADAPTIVE_CFG(ADAPTIVE_ CFG)
CSI-RS Period
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CellCsiRsParaCfg.CsiR CellCsiRsParaCfg.CsiR sPeriod
Set this parameter to ms20(ms20).
CSI-RS Config User Ratio Threshold
CellCsiRsParaCfg.CsiR CellCsiRsParaCfg.CsiR sConfigUserRatioTh
The value 70 is recommended.
CSI-RS Unconfig User Ratio Threshold
CellCsiRsParaCfg.CsiR CellCsiRsParaCfg.CsiR sUnconfigUserRatioTh
The value 50 is recommended.
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The following table describes the parameters that must be set in the CellDlschAlgo MO for downlink scheduling. Table 6-13 6 -13 Parameters that must be set in the CellDlschAlgo MO
Parameter Name
Parameter ID
Setting Notes
MBSFN Subframe Configuration
CellDlschAlgo. MbsfnSf MbsfnSf Cfg
In scenarios where the TM9- or TM10-capable UE penetration rate approaches 100% or in demonstration scenarios, you are advised to configure subframes 1, 2, 3, 6, 7, and 8 as Multimedia Broadcast multicast service Single Frequency Network (MBSFN) subframes.
CSI-RS Subframe Scheduling Strategy Switch
CellDlschAlgo.CsiRsSfS Select the UnCfgCsiRsUEDeOrchStrSwitch derSchSwitch(UnCfgCsiRsUEDe OrderSchSwitch) check box under this parameter.
The following table describes the parameter that must be set in the CellUlschAlgo MO for uplink scheduling. Table 6-14 6 -14 Parameter that must be set in the CellUlschAlgo MO
Parameter Name
Parameter ID
Doppler Measurement Level
CellUlschAlgo. DopMea DopMea sLevel
Setting Notes It is recommended that this parameter be set set to CLASS_1(CLASS_1) to obtain more measurement information.
6.4.5.2 Using the CME For detailed operations, see CME-based Feature Configuration.
6.4.5.3 Using MML Commands Step 1 (Optional) When USU3910-based multi-BBU interconnection is adopted, configure eX2 links. For details about eX2 link configurations, see eX2 Self-Management Feature Parameter Description. Description.
Step 2 Run the MOD NCELLDLRSRPMEASPARA command to turn on the cell-level automatic neighboring cell downlink RSRP measurement switch.
Step 3 Run the MOD CELLALGOSWITCH command to turn on the DL CoMP algorithm switch. Step 4 Run the MOD CELLCSIRSPARACFG command to set CSI-RS-related parameters. Issue 02 (2017-04-27)
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Step 5 Run the MOD CELLDLSCHALGO command with the downlink scheduling-related parameters specified. specified.
Step 6 Run the MOD CELLDLCOMPALGO command to modify cell-level DL CoMP parameters. Step 7 Run the MOD CELLULSCHALGO command with the uplink scheduling-related parameters specified. specified. ----End
6.4.5.4 MML Command Examples 1.
(Optio (Optional nal)) Config Configuri uring ng the eX2 eX2 interf interface ace For details, see eX2 Self-Management Feature Parameter Description. Description .
2.
Enabling Enabling cell-l cell-level evel automatic automatic measureme measurement nt of neighborin neighboring g cell cell downlink downlink RSRP MOD NCELLDLRSRPMEASPARA:LOCALCELLID=0,DlRsrpAutoNCellMeasSwitch= ON;
3.
Turni urning ng on on the the DL CoMP CoMP alg algor orith ithm m swit switch ch MOD CELLALGOSWITCH:LOCALCELLID=0,DlCompSwitch= FDDHetNetDlCompSwitch-1& FDDHomNetDlCompSwitch-1;
4.
Sett Settin ing g CSICSI-RS RS-r -rel elat ated ed par param amet eter erss MOD CELLCSIRSPARACFG:LOCALCELLID=0,CsiRsSwitch= ADAPTIVE_CFG;
5.
Settin Setting g downl downlink ink schedu schedulin ling-r g-rela elated ted parame parameter terss MOD CELLDLSCHALGO:LocalCellId=0,CsiRsSfSchStrSwitch= UnCfgCsiRsUEDeOrderSchSwitch-1;
6.
Modi Modify fyin ing g cell cell-l -lev evel el DL CoM CoMP P para parame mete ters rs MOD CellDlCompAlgo:LOCALCELLID=0,HetnetDpsCoCellRsrpThd=-12, DpsCoCellUserRatioThd=50, DpsLoadDiffThd=20, DpsServingCellDlPrbThd=40, HomnetDpsCoCellRsrpThd=-6, JtCoCellRsrpThd=-6,JtCoCellDlPrbThd=20, JtServingCellDlPrbThd=20;
7.
Settin Setting g upli uplink nk schedu schedulin ling-r g-rela elated ted parame parameter terss MOD CELLULSCHALGO: LocalCellId=0, DopMeasLevel=CLASS_1;
6.4.6 Activation Observation Perform the following steps:
Step 1 On the eNodeB side, run the DSP CELLDLCOMPCOCELLS command to query the value of Cell DL CoMP Property. Expected result: The value of Cell DL CoMP Property is DLCOMP_DPS or DLCOMP_JT .
Step 2 Log in to the U2000 and choose Monitoring > Signaling Trace > Signaling Trace Management . In the displayed window, window, choose Cell Performance Monitoring > DL CoMP Monitoring in the navigation tree. In the displayed dialog box, select the target eNodeBs and create a DL CoMP monitoring task that monitors t he number of DL CoMP UEs in a cell that are also scheduled in coordinating cells.
Expected result: The value of DPS Benefit User Number or JT Benefit User Number is not zero. This result shows that DL CoMP has taken effect. ----End
6.4.7 Deactivation This feature can be deactivated using the CME or MML commands. Issue 02 (2017-04-27)
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6.4.7.1 Using the CME For detailed operations, see CME-based Feature Configuration.
6.4.7.2 Using MML Commands Step 1 (Optional) If the TM9 and TM10 switches are turned off, run the MOD CELLCSIRSPARACFG command to turn off the CSI-RS configuration switch.
Step 2 Run the MOD CELLALGOSWITCH command to turn off the DL CoMP algorithm switch. Step 3 (Optional) If eCSPC and adaptive ICIC are not enabled, run the MOD NCELLDLRSRPMEASPARA command to disable cell-level automatic downlink neighboring cell RSRP measurement. ----End
6.4.7.3 MML Command Examples 1.
(Optio (Optional nal)) Turni Turning ng off off the CSICSI-RS RS confi configur gurati ation on switc switch h MOD CELLCSIRSPARACFG:LOCALCELLID=0,CsiRsSwitch= NOT_CFG;
1.
Turni urning ng off off the the DL CoM CoMP P algo algori rith thm m switc switch h MOD CELLALGOSWITCH:LOCALCELLID=0,DlCompSwitch= FDDHetNetDlCompSwitch-0;
2.
(Optional) (Optional) Disabling Disabling cell-l cell-level evel automa automatic tic measur measuremen ementt of neighbo neighboring ring cell cell downlink downlink RSRP MOD NCELLDLRSRPMEASPARA:LOCALCELLID=0,DlRsrpAutoNCellMeasSwitch= OFF;
6.4.8 Reconfiguration N/A
6.5 Performance Monitoring Use the following methods to monitor the gains offered by DL CoMP.
Using Counters Compare the performance counters before and after DL CoMP is enabled.
Counter ID
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Counter Name
Description
1526743727
L.Traffic.User.DLDps.Avg
Average number of downlink DPS UEs in a cell
1526743728
L.Traffic.User.DLJT.Avg
Average number of downlink JT UEs in a cell
1526743725
L.ChMeas.PRB.DL.DPS.U sed.Avg.OtherCell
Average number of PRBs used in the local cell as a coordinating cell for downlink DPS UEs in other cells
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Counter ID 1526743726
Counter Name
Description
L.ChMeas.PRB.DL.JT.Use d.Avg.OtherCell
Average number of PRBs used in the local cell as a coordinating cell for downlink JT UEs in other cells
1526727444 to 1526727475 L.ChMeas.PDSCH.MCS.0 to L.ChMeas.PDSCH.MCS. 31
Number of times MCS index N index N ( ( N N = = 0 to 31) is selected for PDSCH scheduling
1526729056 to 1526729065 L.Thrp.DL.BitRate.Samp. Index0 to L.Thrp.DL.BitRate.Samp. Index9
Number of samples with the downlink throughput within range N range N ( ( N N = = 0 to 9)
Observe the following indicators before and after activating DL CoMP. CoMP. The changes in the values reflect DL CoMP gains.
Indicator
Formula
Expected Result
Downlink average perceived rate
(L.Thrp.bits.DL L.Thrp.bits.DL.LastTTI )/ L.Thrp.Time.DL.RmvLast TTI
The downlink average user perceived rate does does not decrease or increase after DL CoMP activation.
User-perceived User-perceived rate at the cell edge
(L.Thrp.bits.DL.BorderU E L.Thrp.bits.DL.LastTTI.B orderUE)/ L.Thrp.Time.DL.RmvLast TTI.BorderUE
The user-perceived rate at the cell edge increases i ncreases after DL CoMP activation.
NOTE
Before observing the downlink average user-perceived rate and the user-perceived rate at the cell edge, CELLCOUNTERPARAGROUP command to turn on related switches related to cellrun the MOD CELLCOUNTERPARAGROUP level performance measurement. MML command example: MOD CELLCOUNTERPARAGROUP:LOCALCELLID=0,CELLCOUNTERALGOSWITCH=BasedA3EdgeUserSwitch -1,EDGEUSERA3OFFSET=-12;
Using Signaling Tracing l
Cell-level performance monitoring a.
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6 Engineering Guidelines
b.
In the displayed window, window, choose Cell Performance Monitoring > DL CoMP (Cell) Monitoring in the navigation tree and select the target eNodeB to create a monitoring task.
c.
Observe Observe the the benefici beneficiary ary users and the number number of RBs used in the serving serving cell cell and and coordinating cell.
UE-level performance monitoring a.
On the the U200 2000, choos hoosee Monitor > Signaling Trace > Signaling Trace Management .
b.
In the displayed window, window, choose User Performance Monitoring > DL CoMP (User) Monitoring in the navigation tree and select a target user to create a monitoring task.
c.
Obser Observe ve the the foll followi owing ng item itemss in the tracin tracing g resul result: t: n
Coordinating Cell's Local Cell ID
n
UE Code Count of Coordinating Cell
n
CoCell CQI
n
CoCell DLSCH Code0 Num/CoCell DLSCH Code1 Num
n
CoCell DLSCH Code0 RBs/CoCell DLSCH Code1 RBs
6.6 Parameter Optimization l
Calculate the ratio of the average number of downlink DPS UEs (L.Traffic.User.DLDps.Avg) or average number of JT UEs ( L.Traffic.User.DLJT.Avg ) to the average number of UEs in a cell ( L.Traffic.User.Avg ).
–
If the ratio is higher than 30%, increase the coordinating cell RSRP threshold (for example, from -6 dB to -3 dB) to maintain the ratio within 15% to 30%.
–
If the ratio is lower than 15%, you are advised to decrease the coordinating cell RSRP threshold (for example, from -3 dB to -6 dB) to maintain the ratio within 15% to 30%.
For DPS UEs in HetNet scenarios, the coordinating cell RSRP threshold cannot be smaller than -6 dB. For DPS and JT UEs in HomNet scenarios, the coordinating cell RSRP threshold cannot be smaller than -3 dB. Otherwise, the correctness of data transmission is affected. l
l
If negative gains occur after DL CoMP is enabled and DPS takes effect on the live DpsServingCellDlPrbThd and network, increase the values of CellDlCompAlgo. DpsServingCellDlPrbThd and CellDlCompAlgo. DpsLoadDiffThd DpsLoadDiffThd . In scenarios where the TM9- or TM10-capable UE penetration rate approaches 100% or MbsfnSfCfg in demonstration scenarios, it is recommended that the CellDlschAlgo. MbsfnSfCfg parameter be set to the maximum number of MBSFN MBSFN subframes (including (including subframes 1, 2, 3, 6, 7, and 8) for cells with DL CoMP enabled to offset TM9/TM10 demodulation reference signal (DMRS) overheads and reduce cell-specific reference signal (CRS) interference. DL CoMP requires that the MBSFN subframe configurations for all cells be consistent.
6.7 Possible Issues If the number of UEs that benefit from DPS and JT is zero, or the CEU throughput of the entire network does not increase after DL CoMP is activated, perform the following steps: Issue 02 (2017-04-27)
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eRAN DL CoMP Feature Parameter Description
6 Engineering Guidelines
Step 1 Run the LST CELLALGOSWITCH command to check whether the DL CoMP algorithm switch is turned on. l
If yes, go to Step 2.
l
If no, configure parameters by referring to 6.4.5.1 Data Preparation.
Step 2 Run the DSP CELLDLCOMPCOCELLS command to check whether DL CoMP has taken effect. l l
If yes, go to Step 3. If no, check whether the local cell meets the DL CoMP threshold criteria, including user proportion thresholds for CSI-RS CSI-RS configuration and and unconfiguration and the PRB usage threshold.
Step 3 Check the following performance counters to see whether the DPS or JT UE proportion is too low, for example, lower than 15%.
Counter ID
Counter Name
Description
1526743727
L.Traffic.User.DLD ps.Avg
Average number of downlink DPS UEs in a cell
1526743728
L.Traffic.User.DLJT .Avg
Average number of downlink JT UEs in a cell
l
If no, go to Step 4.
l
If yes, the number of DPS and JT UEs is too small. In this case, DL CoMP cannot offer noticeable gains to increase the capacity in terms of UE quantity and data rate.
Step 4 If the preceding steps fail to resolve the problem, contact Huawei technical support. ----End
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eRAN DL CoMP Feature Parameter Description
7 Parameters
7
Parameters
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eRAN DL CoMP Feature Parameter Description
7 Parameters
Table 7-1 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellAlg oSwitch
DlComp Switch
MOD CELLA LGOSW ITCH
IntereNodeB DL CoMP based on Relaxed backhau l
Meaning:
LST CELLA LGOSW ITCH
TDLAO FD-081 411 LAOFD -120201
DL CoMP
Indicates whether to enable downlink coordinated multipoint transmission (DL CoMP). When the option IntraDlCompSwitch is selected, and the options InterDlCompDcsSwitch and InterDlCompCbfSwitch are deselected, intra-BBP adaptive DL CoMP is enabled and the eNodeB adaptively selects dynamic cell selection (DCS), coordinated beamforming (CBF), or joint transmission (JT) as the transmission mode. When the IntraDlCompSwitch and InterDlCompDcsSwitch InterDlCompDcsSwitc h options are selected and the InterDlCompCbfSwitch option is deselected, intraBBP adaptive DL CoMP, inter-BBP DCS, and intereNodeB DCS are enabled. When the options IntraDlCompSwitch, InterDlCompDcsSwitch, InterDlCompDcsSwitc h, and InterDlCompCbfSwitch InterDlCompCbfSwitch option are selected, intra-BBP adaptive DL CoMP, CoMP, inter-BBP adaptive DL CoMP, and inter-eNodeB adaptive DL CoMP are enabled. In inter-BBP adaptive DL CoMP and inter-eNodeB adaptive DL CoMP, the eNodeB adaptively selects DCS or CBF as the transmission mode. The options IntraDlCompSwitch, InterDlCompDcsSwitch, InterDlCompDcsSwitc h, and InterDlCompCbfSwitch InterDlCompCbfSwitch apply only to LTE TDD. FDDHomNetDlCompSwitch: Indicates whether to FDDHomNetDlCompSwitch: enable DL CoMP in a homogeneous network (consisting of only macro or micro cells) under a Cloud BB architecture. DL CoMP is enabled in such a network only if this option is selected. This option applies only to LTE FDD. FDDHetNetDlCompSwitch: FDDHetNetDlCompSwitch: Indicates whether to enable DL CoMP in a heterogeneous network (consisting of macro and micro cells) under a Cloud BB architecture. DL CoMP is enabled in such a network only if this option is selected. This option applies only to LTE FDD. GUI Value Range: IntraDlCompSwitch(IntraDlCompSwitch), InterDlCompDcsSwitch(InterDlCompDcsSwitch), InterDlCompCbfSwitch(InterDlCompCbfSwitch), FDDHomNetDlCompSwitch(FDDHomNetDlCompS-
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eRAN DL CoMP Feature Parameter Description
MO
Parame ter ID
MML Feature Comma ID nd
7 Parameters
Feature Name
Description
witch), FDDHetNetDlCompSFDDHetNetDlCompSwitch(FDDHetNetDlCompSwitch) Unit: None Actual Value Range: IntraDlCompSwitch, InterDlCompDcsSwitch, InterDlCompDcsSwitc h, InterDlCompCbfSwitch InterDlCompCbfSwitch,, FDDHomNetDlCompSwitch, FDDHomNetDlCompSw itch, FDDHetNetDlCompSFDDHetNetDlCompSwitch Default Value: IntraDlCompSwitch:Off, InterDlCompDcsSwitch:Off, InterDlCompDcsSwitc h:Off, InterDlCompCbfSwitch:Off, FDDHomNetDlCompS FDDHomNetDlCompSwitch:Off, witch:Off, FDDHetNetDlCompSwitch:Off NCellDl RsrpMe asPara
DlRsrp AutoNC ellMeas Switch
MOD NCELL DLRSR PMEAS PARA
LOFD-0 70208 LAOFD -120201
LST NCELL DLRSR PMEAS PARA NCellDl RsrpMe asPara
NCellDl MOD RsrpMe NCELL asA3Off DLRSR set PMEAS PARA LST NCELL DLRSR PMEAS PARA
Coordin ated Scheduli ng based Power Control
Meaning: Indicates whether to enable automatic downlink RSRP measurements on neighboring cells of the cell. This type of measurement is enabled only if this parameter is set to ON. This parameter applies only to LTE FDD.
DL CoMP
Unit: None
GUI Value Range: OFF(Off), ON(On) Actual Value Range: OFF, ON Default Value: OFF(Off)
LOFD-0 70208 LAOFD -120201
Coordin Meaning: Indicates the event A3 offset for automatic ated neighboring cell downlink RSRP measurement. The Scheduli signal quality of the neighboring cell must be offset ng based better than that in the serving serving cell for a UE to report report Power downlink RSRP of this neighboring cell. A l arger Control value of this parameter indicates a lower probability that UEs report automatic neighboring cell downlink DL RSRP measurement results. This parameter applies CoMP only to LTE FDD. GUI Value Range: -30~30 Unit: 0.5dB Actual Value Range: -15~15 Default Value: -12
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellDlC ompAlg o
DpsServ ingCell DlPrbTh d
MOD CELLD LCOMP ALGO
DL CoMP
Meaning: Indicates the threshold of the downlink PRB usage for a DPS serving cell when DL CoMP is enabled. When the PRB usage of a candidate cell exceeds this threshold, the cell can be selected as a DPS serving cell. This parameter applies only to LTE FDD cells.
LAOFD -120201
LST CELLD LCOMP ALGO
GUI Value Range: 0~100 Unit: % Actual Value Range: 0~100 Default Value: 40
CellDlC ompAlg o
Homnet DpsCoC ellRsrpT hd
MOD CELLD LCOMP ALGO
LAOFD -120201
DL CoMP
LST CELLD LCOMP ALGO
Meaning: Indicates the RSRP offset threshold for DPS UEs in selecting a coordinating cell in a HomNet. A large value of this parameter indicates a high requirement on neighboring cell quality for reporting measurement events and a small number of DPS UEs selecting a coordinating cell in a HomNet. A small value of this parameter indicates a large number of DPS UEs selecting a coordinating cell in a HomNet. This parameter applies only to LTE FDD cells. GUI Value Range: -30~30 Unit: 0.5dB Actual Value Range: -15~15 Default Value: -6
CellDlC ompAlg o
HetnetD psCoCel lRsrpTh d
MOD CELLD LCOMP ALGO LST CELLD LCOMP ALGO
LAOFD -120201
DL CoMP
Meaning: Indicates the RSRP offset threshold for DPS UEs in selecting a coordinating cell in a HetNet. A large value of this parameter indicates a high requirement on neighboring cell quality for reporting measurement events and a small number of DPS UEs selecting a coordinating cell in a HetNet. A small value of this parameter indicates a large number of DPS UEs selecting a coordinating cell in a HetNet. This parameter applies only to LTE FDD cells. GUI Value Range: -30~30 Unit: 0.5dB Actual Value Range: -15~15 Default Value: -12
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellDlC ompAlg o
DpsLoa dDiffTh d
MOD CELLD LCOMP ALGO
DL CoMP
Meaning: Indicates the threshold of the difference between the PRB usage usage of a DPS serving serving cell and that of a DPS coordinating cell when DL CoMP is enabled. When the difference exceeds this threshold, the coordinating cell can function as the target cell of DPS UEs. This parameter applies only to LTE FDD cells.
LAOFD -120201
LST CELLD LCOMP ALGO
GUI Value Range: 0~50 Unit: % Actual Value Range: 0~50 Default Value: 20
CellDlC ompAlg o
DpsCoC MOD ellUserR CELLD atioThd LCOMP ALGO
LAOFD -120201
DL CoMP
LST CELLD LCOMP ALGO
Meaning: Indicates the threshold for the ratio of the number of uplink synchronized UEs in a dynamic point selection (DPS) serving cell to a DPS coordinating cell when DL CoMP is enabled. When the ratio of the number of uplink synchronized UEs in the coordinating cell (including those transferred to the coordinating cell) to that in the serving cell is smaller than this threshold, the coordinating cell can function as the target cell of DPS UEs. This parameter applies only to LTE FDD cells. GUI Value Range: 0~100 Unit: % Actual Value Range: 0~100 Default Value: 50
CellDlC ompAlg o
JtServin gCellDl PrbThd
MOD CELLD LCOMP ALGO LST CELLD LCOMP ALGO
LAOFD -120201
DL CoMP
Meaning: Indicates the threshold of the downlink PRB usage for a serving cell for joint transmission when DL CoMP is enabled. When the PRB usage of a candidate cell is smaller than this threshold, the cell can be selected as a serving cell for joint transmission. This parameter applies only to LTE FDD cells. GUI Value Range: 0~100 Unit: % Actual Value Range: 0~100 Default Value: 20
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellDlC ompAlg o
JtCoCell RsrpThd
MOD CELLD LCOMP ALGO
DL CoMP
Meaning: Indicates the RSRP offset threshold for joint transmission UEs in selecting a coordinating cell. A large value of this parameter indicates a high requirement on neighboring cell quality for reporting measurement events and a small number of joint transmission UEs. A small value of this parameter indicates a large number of joint transmission UEs. This parameter applies only to LTE FDD cells.
LAOFD -120201
LST CELLD LCOMP ALGO
GUI Value Range: -30~30 Unit: 0.5dB Actual Value Range: -15~15 Default Value: -6 CellDlC ompAlg o
JtCoCell DlPrbTh d
MOD CELLD LCOMP ALGO
LAOFD -120201
DL CoMP
LST CELLD LCOMP ALGO
Meaning: Indicates the threshold of the downlink PRB usage for joint transmission UEs in selecting a coordinating cell when DL CoMP is enabled. When the PRB usage of a candidate cell is lower than this threshold, the cell can be selected as a coordinating cell for joint transmission. This parameter applies only to LTE FDD cells. GUI Value Range: 0~100 Unit: % Actual Value Range: 0~100 Default Value: 20
CellCsp cPara
CellCsp cSwitch
MOD CELLC SPCPA RA LST CELLC SPCPA RA
LOFD-0 70208 TDLOF D-08020 3
Coordin ated Scheduli ng based Power Control( Cloud BB)
Meaning: Indicates whether to enable CSPC in the cell. This parameter applies only to LTE LTE FDD and LTE TDD. GUI Value Range: OFF(Off), ON(On) Unit: None Actual Value Range: OFF, ON Default Value: OFF(Off)
Coordin ated Scheduli ng based Power Control
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellCsp cPara
CelleCs pcSwitc h
MOD CELLC SPCPA RA
Coordin ated Scheduli ng based Power Control
Meaning: Indicates whether to enable cell-level enhanced CSPC (eCSPC). eCSPC is enabled only when this parameter is set to ON(On). This parameter applies only to LTE FDD.
LOFD-0 70208
LST CELLC SPCPA RA
GUI Value Range: OFF(Off), ON(On) Unit: None Actual Value Range: OFF, ON Default Value: OFF(Off)
CellDlsc hAlgo
CsiRsSf SchStrS witch
MOD CELLD LSCHA LGO LST CELLD LSCHA LGO
TDLAO FD-001 00114 TDLAO FD-081 409 LEOFD121207 LOFD-0 03029 LOFD-0 70205 LOFD-0 81208 LOFD-0 81209 LAOFD -120201
DL 2Layer MIMO Based on TM9 DL 4Layer MIMO Based on TM9 eMIMO Phase 2 SFN Adaptiv e SFN/ SDMA IntereNodeB SFN Based on Coordin ated eNodeB IntereNodeB Adaptiv e SFN/ SDMA Based on Coordin ated eNodeB
Meaning: Indicates the scheduling policy of subframes transmitting CSI-RSs. UnCfgCsiRsUESchSwitch: Indicates whether UEs UnCfgCsiRsUESchSwitch: that do not support CSI-RSs can be scheduled in subframes transmitting CSI-RSs. These UEs can be scheduled in these subframes only when this option is selected. UEs that do not support CSI-RSs refer to the CSI-RSs that cannot identify the subframes transmitting CSI-RSs. This option applies only to LTE TDD. UnCfgCsiRsUEDeOrderSchSwitch: Indicates whether UnCfgCsiRsUEDeOrderSchSwitch: UEs that do not support CSI-RSs can be scheduled in subframes transmitting CSI-RSs using the newly configured MCS index decreasing policy. This option applies only to LTE FDD and LTE TDD. GUI Value Range: UnCfgCsiRsUESchSwitch, UnCfgCsiRsUEDeOrderSchSwitch(UnCfgCsiRsUEDeOrderSchSwitch) Unit: None Actual Value Range: UnCfgCsiRsUESchSwitch, UnCfgCsiRsUEDeOrderSchSwitch Default Value: UnCfgCsiRsUESchSwitch:Off, UnCfgCsiRsUEDeOrderSchSwitch:Off
DL CoMP
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
CellCou nterPara Group
CellCou nterAlgo Switch
MOD CELLC OUNTE RPARA GROUP
Virtual 4T4R
LST CELLC OUNTE RPARA GROUP
CellCou nterPara Group
EdgeUs erA3Off set
MOD CELLC OUNTE RPARA GROUP LST CELLC OUNTE RPARA GROUP
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LEOFD111305 / LEOFD111305 LOFD-0 60201 LOFD-0 70208
LEOFD111305 LOFD-0 60201 LOFD-0 70208
Description
Meaning: Indicates whether to enable cell-level algorithms related to performance counters. This includes the following options: Adaptiv parameter includes BasedA3EdgeUserSwitch: BasedA3EdgeUserSwitch: Indicates whether to enable e InterA3-based cell edge user (CEU) identification. If this Cell Interfere option is selected, the eNodeB starts to identify CEUs based on A3-related A3-related measurement reports reports and collects nce Coordin related performance counters based on the identified CEUs. This option applies only to LTE FDD and LTE ation TDD. Coordin GUI Value Range: ated BasedA3EdgeUserSwitch(BasedA3EdgeUserSwitch) UserSwitch) Scheduli BasedA3EdgeUserSwitch(BasedA3Edge ng based Unit: None Power Actual Value Range: BasedA3EdgeUserSwitch Control Default Value: BasedA3EdgeUserSwitch:Off Virtual 4T4R
Meaning: Indicates the offset for cell edge user (CEU) identification event A3. This offset is the difference quality of a neighboring cell cell and Adaptiv between the signal quality that of the serving cell. A larger value of this e Inter parameter results that that better signal quality of the Cell Interfere neighboring cell is required for the reporting of CEU identification event A3 and the eNodeB has a lower nce UE as a CEU. A smaller Coordin probability of identifying a UE value of this parameter results in a higher probability ation that a UE is identified as a CEU. This parameter Coordin applies only to LTE FDD and LTE TDD. ated Scheduli GUI Value Range: -30~30 ng based Unit: 0.5dB Power Actual Value Range: -15~15 Control Default Value: -13
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellCou nterPara Group
EdgeUs erServR SRPThd
MOD CELLC OUNTE RPARA GROUP
None
Meaning: Indicates the serving cell RSRP threshold threshold for determining CEUs when the BasedA3EdgeUserSwitch BasedA3EdgeUserSwitch option of the CellCounterAlgoSwitch parameter is selected. A larger value of this parameter indicates a higher probability of identifying a UE UE as a CEU. A smaller value of this parameter indicates a lower probability of identifying a UE as a CEU. The value 255 indicates that the serving cell RSRP is not used in the identification. This parameter applies only to LTE FDD and LTE TDD.
None
LST CELLC OUNTE RPARA GROUP
GUI Value Range: -140~-43,255 Unit: dBm Actual Value Range: -140~-43,255 Default Value: 255 CellCsi RsParaC fg
CsiRsS witch
MOD CELLC SIRSPA RACFG LST CELLC SIRSPA RACFG
TDLOF D-00100 3 TDLAO FD-001 00114 TDLAO FD-081 409
DL 4*2 MIMO DL 2Layer MIMO Based on TM9 DL 4Layer MIMO Based on TM9
Meaning: Indicates whether to configure CSI-RSs for UEs. If this parameter is set to NOT_CFG(Not configure), the eNodeB does not configure CSI-RSs for UEs. If this parameter is set t o FIXED_CFG(Fixed configure), the eNodeB configures CSI-RSs for UEs that support CSI-RSs. If this parameter is set to ADAPTIVE_CFG(ADAPTIVE_CFG ADAPTIVE_CFG(ADAPTIVE_CFG), ), the eNodeB determines whether to configure CSI-RSs for UEs that support CSI-RSs based on the proportion of TM9 UEs. When SfnLoadBasedAdptSwitch is deselected in a TDD cell with adaptive SFN enabled, neither FIXED_CFG nor ADAPTIVE_CFG takes effect. This parameter applies only to LTE LTE FDD and LTE LTE TDD. GUI Value Range: NOT_CFG(Not configure), FIXED_CFG(Fixed FIXED_CFG(Fixed configure), ADAPTIVE_CFG(ADAPTIVE_CFG) Unit: None Actual Value Range: NOT_CFG, FIXED_CFG, ADAPTIVE_CFG Default Value: NOT_CFG(Not configure)
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
CellCsi RsParaC fg
CsiRsPe riod
MOD CELLC SIRSPA RACFG
DL 2*2 Meaning: Indicates the channel state information MIMO (CSI) reference signal (RS) measurement period. This based on parameter applies only to LTE LTE FDD and LTE LTE TDD. TM9 GUI Value Range: ms5(ms5), ms10(ms10), DL 4*2 ms20(ms20), ms40(ms40), ms80(ms80) MIMO Unit: None based on Actual Value Value Range: ms5, ms10, ms20, ms40, ms80 TM9 Default Value: ms5(ms5) DL 8x2
LST CELLC SIRSPA RACFG
LAOFD -080210 LAOFD -080205 / TDLAO FD-001 00113 TDLAO FD-001 00114 TDLAO FD-080 406 TDLAO FD-080 407 TDLAO FD-081 409
Description
MIMO based on TM9 DL 4x4 MIMO based on TM9 DL 8x4 MIMO based on TM9 DL 4Layer MIMO Based on TM9
CellCsi RsParaC fg
CsiRsCo MOD nfigUser CELLC RatioTh SIRSPA RACFG
LOFD-0 01001
DL 2*2 MIMO
LOFD-0 01003
DL 4*2 MIMO
LST CELLC SIRSPA RACFG
LOFD-0 01060
DL 4x4 MIMO
TDLAO FD-001 00114
DL 2Layer MIMO Based on TM9
TDLAO FD-081 409
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Meaning: Indicates the threshold of the proportion of RRC_CONNECTED UEs supporting CSI_RS that is used to determine a change from the CSI-RS unconfigured state to the CSI-RS configured state when adaptive CSI-RS configuration is adopted. This parameter applies only to LTE LTE FDD and LTE LTE TDD. GUI Value Range: 0~100 Unit: % Actual Value Range: 0~100 Default Value: 50
DL 4Layer MIMO Based on TM9
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
Description
CellCsi RsParaC fg
CsiRsU nconfig UserRati oTh
MOD CELLC SIRSPA RACFG
LOFD-0 01001
DL 2*2 MIMO
LOFD-0 01003
DL 4*2 MIMO
LST CELLC SIRSPA RACFG
LOFD-0 01060
DL 4x4 MIMO
Meaning: Indicates the threshold of the proportion of RRC_CONNECTED UEs supporting CSI_RS that is used to determine a change from the CSI-RS configured state to the CSI-RS unconfigured state when adaptive CSI-RS configuration is adopted. This parameter applies only to LTE LTE FDD and LTE LTE TDD.
TDLAO FD-001 00114
DL 2Layer MIMO Based on TM9
TDLAO FD-081 409
CellDlsc hAlgo
MbsfnSf MOD Cfg CELLD LSCHA LGO LST CELLD LSCHA LGO
LAOFD -080210 LAOFD -080205
GUI Value Range: 0~100 Unit: % Actual Value Range: 0~100 Default Value: 40
DL 4Layer MIMO Based on TM9 DL 2*2 Meaning: Indicates whether to configure Multimedia MIMO Broadcast multicast service Single Frequency based on Network (MBSFN) subframes. The ten options of this TM9 parameter map to the ten MBSFN subframes. subframes. If an option is selected, the corresponding subframe is DL 4*2 configured. If an option is not selected, the MIMO based on corresponding subframe is not configured. PDSCH services with enhanced MIMO applied can be TM9 scheduled on configured MBSFN subframes. This parameter applies only to LTE LTE FDD and LTE LTE TDD. GUI Value Range: SubFrame0(SubFrame0), SubFrame1(SubFrame1), SubFrame1(SubFrame1), SubFrame2(SubFrame2), SubFrame2(SubFrame2), SubFrame3(SubFrame3), SubFrame3(SubFrame3), SubFrame4(SubFrame4), SubFrame4(SubFrame4), SubFrame5(SubFrame5), SubFrame5(SubFrame5), SubFrame6(SubFrame6), SubFrame6(SubFrame6), SubFrame7(SubFrame7), SubFrame7(SubFrame7), SubFrame8(SubFrame8), SubFrame8(SubFrame8), SubFrame9(SubFrame9) Unit: None Actual Value Range: SubFrame0, SubFrame1, SubFrame2, SubFrame3, SubFrame4, SubFrame5, SubFrame6, SubFrame7, SubFrame8, SubFrame9 Default Value: SubFrame0:Off, SubFrame1:Off, SubFrame2:Off, SubFrame3:Off, SubFrame4:Off, SubFrame5:Off, SubFrame6:Off, SubFrame7:Off, SubFrame8:Off, SubFrame9:Off
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eRAN DL CoMP Feature Parameter Description
7 Parameters
MO
Parame ter ID
MML Feature Comma ID nd
Feature Name
CellUlsc hAlgo
DopMea sLevel
MOD CELLU LSCHA LGO
Dynami Meaning: Indicates the Doppler measurement level, c which is used for selecting a Doppler measurement Scheduli policy. policy. If this parameter is set to CLASS_0, the ng demodulation reference signal (DMRS) whose signal to interference plus noise ratio (SINR) is greater than or equal to 5 dB is used in Doppler measurement. If this parameter is set to CLASS_1, the DMRS whose SINR is greater than or equal to –5 dB is used in Doppler measurement. This parameter does not take effect on cells established on an LBBPc. This parameter applies only to LTE LTE FDD and LTE LTE TDD.
LST CELLU LSCHA LGO
LBFD-0 0101502 / TDLBF D-00101 502
Description
GUI Value Range: CLASS_0(CLASS_0), CLASS_1(CLASS_1) Unit: None Actual Value Range: CLASS_0, CLASS_1 Default Value: CLASS_0(CLASS_0)
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eRAN DL CoMP Feature Parameter Description
8 Counters
8
Counters
Table 8-1 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526726740
L.ChMeas.PRB.DL .Used.Avg
Average number of used PDSCH PRBs
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None
Adaptive SFN/ SDMA
LTE: LBFD-002025
Virtual 4T4R
TDLBFD-002025 LOFD-070205 LEOFD-111305 1526727378
L.Traffic.User.Avg
Average number of users in a cell
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002007
RRC Connection Management RRC Connection Management
TDLBFD-002007 1526727379
L.Traffic.User.Max
Maximum nu n umber of users in a cell
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002007
RRC Connection Management RRC Connection Management
TDLBFD-002007
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eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526727396
L.ChMeas.CQI.DL. 0
Number of wideband CQI reports with the value of 0
Multi-mode: None
Dynamic Downlink Power Allocation
GSM: None UMTS: None LTE: LBFD-002016 LBFD-00101502
Dynamic Scheduling Dynamic Downlink Power Allocation
TDLBFD-002016 1526727411
L.ChMeas.CQI.DL. 15
Number of wideband CQI reports with the value of 15
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002016 LBFD-00101502
Dynamic Downlink Power Allocation Dynamic Scheduling Dynamic Downlink Power Allocation
TDLBFD-002016 1526727444
L.ChMeas.PDSCH. MCS.0
Number of times MCS index 0 is scheduled on the PDSCH
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
1526727475
L.ChMeas.PDSCH. MCS.31
Number of times MCS index 31 is scheduled on the PDSCH
Modulation: DL/UL QPSK, DL/UL 16QAM, DL 64QAM
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
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Basic Scheduling Modulation: DL/UL QPSK, DL/UL 16QAM, DL 64QAM
45
eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526728261
L.Thrp.bits.DL
Total do downlink traffic volume for PDCP SDUs in a cell
Multi-mode: None
Radio Bearer Management
GSM: None UMTS: None
Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025 1526728262
L.Thrp.Time.DL
Total transmit duration of downlink PDCP SDUs in a cell
Multi-mode: None GSM: None UMTS: None
Radio Bearer Management Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025 1526728969
L.Traffic.ActiveUse r.DL.Avg
Average number of activated UEs in downlink
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002007
RRC Connection Management RRC Connection Management
TDLBFD-002007 1526728970
L.Traffic.ActiveUse r.DL.Max
Maximum number of activated UEs in downlink
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002007
RRC Connection Management RRC Connection Management
TDLBFD-002007 1526728975
L.Traffic.ActiveUse r.Avg
Average number of activated UEs
Multi-mode: None GSM: None UMTS: None LTE: LBFD-002007
RRC Connection Management RRC Connection Management
TDLBFD-002007
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eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526728976
L.Traffic.ActiveUse r.Max
Maximum number of activated UEs
Multi-mode: None
RRC Connection Management
GSM: None UMTS: None LTE: LBFD-002007
RRC Connection Management
TDLBFD-002007 1526728997
L.Thrp.Time.Cell.D L.HighPrecision
Total duration of downlink data transmission in a cell (with the precision of 1 ms)
Multi-mode: None GSM: None UMTS: None
Radio Bearer Management Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025 1526729005
L.Thrp.bits.DL.Last TTI
Downlink traffic volume sent in the last TTI for PDCP SDUs before the buffer is empty
Multi-mode: None GSM: None UMTS: None
Radio Bearer Management Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025 1526729015
L.Thrp.Time.DL.R mvLastTTI
Data transmit duration except the last TTI before the downlink buffer is empty
Multi-mode: None GSM: None UMTS: None
Radio Bearer Management Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025 1526729056
L.Thrp.DL.BitRate. Samp.Index0
Number of samples with the downlink throughput ranging within index 0
Multi-mode: None GSM: None UMTS: None
Radio Bearer Management Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025
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eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526729065
L.Thrp.DL.BitRate. Samp.Index9
Number of samples with the downlink throughput ranging within index 9
Multi-mode: None
Radio Bearer Management
GSM: None UMTS: None
Radio Bearer Management
LTE: LBFD-002008
Basic Scheduling
TDLBFD-002008
Basic Scheduling
LBFD-002025 TDLBFD-002025 1526730141
L.ChMeas.RI.Rank Number of times 1 rank 1 is reported
Multi-mode: None
Basic Scheduling
GSM: None
DL 2x2 MIMO
UMTS: None
DL 4x2 MIMO
LTE: LBFD-002025
Basic Scheduling DL 2x2 MIMO
LOFD-001001 LOFD-001003 TDLBFD-002025 TDLOFD-001001 1526730142
L.ChMeas.RI.Rank Number of times a 2 UE reports rank 2
Multi-mode: None
Basic Scheduling
GSM: None
DL 2x2 MIMO
UMTS: None
DL 4x2 MIMO
LTE: LBFD-002025
Basic Scheduling DL 2x2 MIMO
LOFD-001001 LOFD-001003 TDLBFD-002025 TDLOFD-001001 1526732737
L.ChMeas.RI.Rank Number of times a 3 UE reports rank 3
Multi-mode: None
Basic Scheduling
GSM: None
DL 4x4 MIMO
UMTS: None
Basic Scheduling
LTE: LBFD-002025 LOFD-001060 TDLBFD-002025
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eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
1526732738
L.ChMeas.RI.Rank Number of times a 4 UE reports rank 4
Feature ID
Feature Name
Multi-mode: None
Basic Scheduling
GSM: None
DL 4x4 MIMO
UMTS: None
Basic Scheduling
LTE: LBFD-002025 LOFD-001060 TDLBFD-002025 1526737710
L.ChMeas.CQI.DL. BorderUE.Total
Accumulated value of wideband CQIs reported by CEUs
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526737711
L.ChMeas.CQI.DL. Number of times BorderUE.Num wideband CQIs are reported by CEUs
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526737755
L.Thrp.bits.DL.Bor Downlink PDCPderUE layer traffic volume sent for CEUs in a cell
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526737758
L.Thrp.bits.DL.Last TTI.BorderUE
Downlink PDCPlayer traffic volume sent in the last TTI for CEUs before the buffer is empty in a cell
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526737759
L.Thrp.Time.DL.R mvLastTTI.Border UE
Data transmission duration for CEUs except the last TTI before the downlink buffer is empty
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
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eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526741760
L.Thrp.Time.DL.Bo rderUE
Total duration of sending data to cell edge UEs in the downlink at the PDCP layer in a cell
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526741767
L.ChMeas.PRB.PD SCH.Avg.BorderU E
Average number of PDSCH PRBs occupied by CEUs in a cell
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025
1526741888
L.Traffic.User.Bord erUE.Avg
Average number of CEUs in a cell
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025 1526741889
L.Traffic.User.Bord erUE.Max
Maximum number of CEUs in a cell
Multi-mode: None
Basic Scheduling
GSM: None
Basic Scheduling
UMTS: None LTE: LBFD-002025 TDLBFD-002025 1526743725
L.ChMeas.PRB.DL .DPS.Used.Avg.Oth erCell
Average number of PRBs of a cell used for DL DPS UEs in other cells
Multi-mode: None
DL CoMP
GSM: None UMTS: None LTE: LAOFD-120201
1526743726
L.ChMeas.PRB.DL .JT.Used.Avg.Other Cell
Average number of PRBs of a cell used for DL JT UEs in other cells
Multi-mode: None
DL CoMP
GSM: None UMTS: None LTE: LAOFD-120201
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50
eRAN DL CoMP Feature Parameter Description
8 Counters
Counter ID
Counter Name
Counter Description
Feature ID
Feature Name
1526743727
L.Traffic.User.DLD PS.Avg
Average number of DL DPS UEs in a cell
Multi-mode: None
DL CoMP
GSM: None UMTS: None LTE: LAOFD-120201
1526743728
L.Traffic.User.DLJ T.Avg
Average number of DL JT UEs in a cell
Multi-mode: None
DL CoMP
GSM: None UMTS: None LTE: LAOFD-120201
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eRAN DL CoMP Feature Parameter Description
9 Glossary
9
Glossary
For the acronyms, abbreviations, terms, and definitions, see Glossary. Glossary.
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eRAN DL CoMP Feature Parameter Description
10 Reference Documents
10
Reference Documents
1.
Cloud BB Overview Feature Parameter Description
2.
eX2 Self-Management Feature Parameter Description
3.
USU3910-based Multi-BBU Interconnection Feature Parameter Description
4.
Synchronization Feature Parameter Description
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