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SingleRAN
Common Radio Resource Management Feature Parameter Description Issue
02
Date
2013-11-15
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd. Address:
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Website:
http://www.huawei.com
Email:
[email protected]
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Contents
Contents 1 About This Document..................................................................................................................1 1.1 Scope..............................................................................................................................................................................1 1.2 Intended Audience..........................................................................................................................................................1 1.3 Change History...............................................................................................................................................................1
2 Overview of Co-RRM...................................................................................................................4 2.1 Introduction....................................................................................................................................................................4 2.2 Purposes..........................................................................................................................................................................5
3 Cell Load Information Sharing...................................................................................................6 3.1 Common Measurement Procedure.................................................................................................................................6 3.2 Cell Load Information....................................................................................................................................................7
4 Handover Based on Load Enhancement...................................................................................9 4.1 Handover Based on Load Enhancement.........................................................................................................................9 4.1.1 Load-Based Inter-RAT Handover Enhancement.........................................................................................................9 4.1.2 Inter-RAT Handover based on Hierarchical Cell Structure Enhancement................................................................10 4.2 GSM Handover Based on Load Enhancement.............................................................................................................10
5 Service Distribution....................................................................................................................12 5.1 UMTS-to-GSM Service Distribution...........................................................................................................................12 5.1.1 CS Service Distribution During RRC Setup..............................................................................................................12 5.1.2 Service Distribution After RAB Setup......................................................................................................................13 5.2 GSM-to-UMTS Service Distribution...........................................................................................................................14
6 Load Balancing.............................................................................................................................16 6.1 UMTS Load Balancing.................................................................................................................................................16 6.1.1 Load Balancing During RRC Setup..........................................................................................................................16 6.1.2 Load Balancing After RAB Setup.............................................................................................................................18 6.2 GSM Load balancing....................................................................................................................................................19
7 NACC Procedure Optimization................................................................................................21 8 Engineering Guidelines.............................................................................................................23 8.1 Iur-g Configuration and Maintenance..........................................................................................................................23 8.1.1 Requirements.............................................................................................................................................................23 8.1.2 Data Preparation........................................................................................................................................................23 Issue 02 (2013-11-15)
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Contents
8.1.3 Configuring the Iur-g Interface..................................................................................................................................27 8.1.4 Maintaining the Iur-g Interface..................................................................................................................................29 8.2 Deployment of Handover Based on Load Enhancement..............................................................................................30 8.3 Deployment of MBSC Service Distribution.................................................................................................................33 8.4 Deployment of MBSC Load Balancing........................................................................................................................35 8.5 Deployment of NACC Procedure Optimization...........................................................................................................38
9 Parameters.....................................................................................................................................41 10 Counters......................................................................................................................................73 11 Glossary.......................................................................................................................................75 12 Reference Documents...............................................................................................................76
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SingleRAN Common Radio Resource Management Feature Parameter Description
1
1 About This Document
About This Document
1.1 Scope This document describes the common radio resource management (Co-RRM), including its technical principles and engineering guidelines. This document covers the following features: l
MRFD-211404 MBSC Handover based on Load Enhancement
l
WRFD-070004 Load Based GSM and UMTS Handover Enhancement Based on Iur-g
l
GBFD-511101 Load Based Handover Enhancement on Iur-g
l
MRFD-211403 MBSC Service Distribution
l
WRFD-070007 GSM and UMTS Traffic Steering Based on Iur-g
l
GBFD-511104 GSM and WCDMA Traffic Steering Based on Iur-g
l
MRFD-211402 MBSC Load Balancing
l
WRFD-070006 GSM and UMTS Load Balancing Based on Iur-g
l
GBFD-511103 GSM and WCDMA Load Balancing Based on Iur-g
l
MRFD-211401 NACC Procedure Optimization
l
WRFD-070005 NACC Procedure Optimization Based on Iur-g
1.2 Intended Audience This document is intended for personnel who: l
Need to understand the features described herein
l
Work with Huawei products
1.3 Change History This section provides information about the changes in different document versions. There are two types of changes, which are defined as follows: l Issue 02 (2013-11-15)
Feature change Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
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Changes in features of a specific product version l
Editorial change Changes in wording or addition of information that was not described in the earlier version
02 (2013-11-15) This issue includes the following changes. Change Type
Change Description
Parameter Change
Feature change
None
None
Editorial change
Optimized descriptions in section "3.2 Cell Load Information."
Added the following parameters: l DlLdrThrd2GCell l DOlcThrd2GCell l DlOlcThrd2GCell l InterRatCsServiceLoadHoThrd
Optimized descriptions in section "4.2 GSM Handover Based on Load Enhancement."
Added the following parameters: l G2GLoadAdjustCoeff l G2G3GldBlcDeltaThrd l FDDREP l InterRATLoadHoRSCPStart l IntRATLoadHORSCPThr l IntRATLoadHoPeriod l InterRATLoadHoRSCPStep l TRIGTHRES l InterRATLoadHoRSCPBandWidth l InterRATLoadHoEcNoStart l IntRATLoadHOEcNoThr l IntRATLoadHoPeriod l InterRATLoadHoEcNoStep l InterRATLoadHoEcNoBandWidth
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Change Type
1 About This Document
Change Description
Parameter Change
Optimized the figures in this document.
None
01 (2013-04-28) This issue does not include any changes.
Draft A (2012-12-30) Compared with issue 02 (2012-07-20) of SRAN7.0, Draft A (2012-12-30) of SRAN8.0 includes the following changes.
Issue 02 (2013-11-15)
Change Type
Change Description
Parameter Change
Feature change
Modified descriptions about GSM service distribution. For details, see section 5.2 GSM-to-UMTS Service Distribution.
None
Editorial change
Added information about how to configure and maintain the Iur-g interface. For details, see section 8.1 Iur-g Configuration and Maintenance
None
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2 Overview of Co-RRM
Overview of Co-RRM
2.1 Introduction The Co-RRM feature utilizes information exchange between GSM and UMTS over the Iur-g interface to support the following functions and mechanisms: l
Cell Load Information Sharing
l
Handover Based on Load Enhancement
l
Service Distribution
l
Load Balancing
l
NACC Procedure Optimization
Through the internal information exchange, the load information of GSM and UMTS cells can be shared, and the procedure of Network Assisted Cell Change (NACC) can be optimized. Handover based on load enhancement, service distribution, and load balancing are based on the traffic load of GSM/UMTS cells and the characteristics of each network. The main difference between the three functions is the requirements for candidate cells during inter-RAT handovers. The following sections provide the detailed description for each function. The MBSC is a GSM+UMTS multimode base station controller (MBSC) of Huawei. It implements the functions of both UMTS RNC and GSM BSC, as shown in Figure 2-1. In this document, the base station controller is referred to as BSC regarding GSM functions and as RNC regarding UMTS functions.
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2 Overview of Co-RRM
Figure 2-1 MBSC in Co-RRM
2.2 Purposes In Co-RRM, several GSM/UMTS interoperability functions are optimized in the MBSC to achieve better network convergence and enhance network throughput. The Co-RRM feature provides the following advantages: l
Load information of the neighboring GSM and UMTS cells can be shared, which enhances the load control capability between GSM and UMTS.
l
The accuracy of the load information for handover decision between GSM and UMTS is enhanced, reducing the risk of ping-pong effect.
l
Service load can be distributed based on the conditions in the GSM and UMTS networks through RRC redirection and service-based inter-RAT handovers. This enables the GSM network to handle voice services and the UMTS network to handle high-speed PS services
l
Service load can be distributed based on the service attributes and the conditions in the GSM and UMTS networks through RRC redirection and load-based inter-RAT handovers. In this way, the load on the two networks in the same coverage area is increased evenly so the risk of network congestion due to load imbalance is reduced and the total network capacity is enhanced.
l
The CN does not need to be involved in the GSM/UMTS PS NACC procedure under one MBSC. In this way, the execution time for the NACC procedure is shortened and the PS service handover delay is reduced. In addition, an NACC solution is also provided when the CN does not support the RAN information management (RIM) procedure.
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3 Cell Load Information Sharing
Cell Load Information Sharing
3.1 Common Measurement Procedure The basic procedure behind the cell load information sharing is an MBSC internal information exchange mechanism, where the BSC side of the MBSC sends a COMMON MEASUREMENT INITIATION REQUEST message to the RNC side and vice versa to initiate the common measurement procedure, requesting the target RNC/BSC to report the load information of its neighboring cells. If the target RNC/BSC supports the common measurement, it responds with a COMMON MEASUREMENT INITIATION RESPOSE message; otherwise, it responds with a COMMON MEASUREMENT INITIATION FAILURE message. After a successful common measurement initialization, the target RNC/BSC sends the COMMON MEASUREMENT REPORT message to the source BSC/RNC periodically to report its load information. If the measurement fails to be further performed, for example, when the cell is faulty, blocked, deleted, or deactivated, the common measurement is stopped. In this case, the target RNC/BSC sends a COMMON MEASUREMENT FAILURE INDICATION message to the source BSC/RNC. If the BSC sends a COMMON MEASUREMENT INITIATION REQUEST message to the interconnected RNC over the Iur-g interface, the RNC supports a maximum of 3000 UMTS cells. Figure 3-1, Figure 3-2, Figure 3-3 and Figure 3-4 show the common measurement procedure. Figure 3-1 Successful common measurement initialization
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Figure 3-2 Failed common measurement initialization
Figure 3-3 Common measurement reporting procedure
Figure 3-4 Failed common measurement
3.2 Cell Load Information During the common measurement procedure, load information related to GSM and UMTS cells is shared between the BSC and RNC sides of the MBSC. In addition, the GSM cell sends the information whether it supports inter-RAT handovers. There are three load states: normal, basic congestion, and overload congestion. In the uplink: l
An uplink load lower than the GSM uplink basic congestion threshold (UlLdrThrd2GCell) represents the normal state.
l
An uplink load above the GSM uplink basic congestion threshold (UlLdrThrd2GCell) but below the GSM uplink overload congestion threshold (UlOlcThrd2GCell) represents the basic congestion state.
l
An uplink load above the GSM uplink overload congestion threshold (UlOlcThrd2GCell) represents the overload congestion state.
In the downlink: Issue 02 (2013-11-15)
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l
A downlink load below the GSM downlink basic congestion threshold (DlLdrThrd2GCell) represents the normal state.
l
A downlink load above the GSM downlink basic congestion threshold (DlLdrThrd2GCell) but lower than the GSM downlink overload congestion threshold (DOlcThrd2GCell) represents the basic congestion state.
l
A downlink load above the GSM downlink overload congestion threshold (DlOlcThrd2GCell) represents the overload congestion state.
The BSC side of the MBSC sends the inter-RAT handover support information to indicate whether the CS/PS services can be handed over from a UMTS cell to a GSM cell. The interRAT handover support information includes the inter-RAT CS service handover support flag and the inter-RAT PS service handover support flag. l
If the inter-RAT CS service handover support flag is enabled, the corresponding GSM cell can be the target cell of the inter-RAT CS service handover from a UMTS cell. Use the following method to determine whether the inter-RAT CS service handover support flag is enabled: If inter-RAT handovers to GSM cells are allowed, compare the cell TCH usage with InterRatCsServiceLoadHoThrd. – If the cell TCH usage is less than or equal to the value of this parameter, the inter-RAT CS service handover support flag is enabled. – If the cell TCH usage is greater than the value of this parameter, the inter-RAT CS service handover support flag is disabled.
l
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If the inter-RAT PS service handover support flag is enabled, the corresponding GSM cell can be the target cell of the inter-RAT PS service handover from a UMTS cell.
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4 Handover Based on Load Enhancement
Handover Based on Load Enhancement
4.1 Handover Based on Load Enhancement The UMTS handover based on load enhancement function corresponds to the feature WRFD-070004 Load Based GSM and UMTS Handover Enhancement Based on Iur-g. Through the internal load information sharing mechanism, the load-based inter-RAT handover is enhanced in the UMTS. l
In the load-based inter-RAT handover, the UMTS selects the target GSM cell according to the load on the neighboring GSM cell and the load difference between the UMTS cell and the neighboring GSM cell.
l
In the inter-RAT handover based on hierarchical cell structure, the UMTS selects the target GSM cell depending on the load on the neighboring cells.
The following paragraphs provide further descriptions of the two handover modes.
4.1.1 Load-Based Inter-RAT Handover Enhancement When the indication of non-coverage-based handover based on GSM load (MBSCNcovHoOn2GldInd(BSC6900,BSC6910)) and the indication of load-based handover based on the load difference between UMTS and GSM (LoadHoOn3G2GldInd (BSC6900,BSC6910)) are set to ON, the load-based handover to the GSM cell is triggered when the traffic load on the UMTS cell is heavy. The RNC performs handover decision based on the load on the neighboring GSM cell and the load difference between the UMTS cell and the neighboring GSM cell. For the CS service, a GSM candidate cell must meet the following conditions: l
The cell supports the inter-RAT handover for CS services.
l
The load on the cell is lower than the CS outgoing inter-RAT handover GSM load threshold (CSHOOut2GloadThd(BSC6900,BSC6910)).
l
The load of UMTS source cell minus the load of the cell is higher than the threshold of CS load difference between UMTS and GSM (Mbsc3G2GLdBlcCsDeltaThrd (BSC6900,BSC6910)).
For the PS service, a GSM candidate cell must meet the following conditions: Issue 02 (2013-11-15)
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l
The cell supports the inter-RAT handover for PS services.
l
The load on the cell is lower than the PS outgoing inter-RAT handover GSM load threshold (PSHOOut2GloadThd(BSC6900,BSC6910)).
l
The load of UMTS source cell minus the load of the cell is higher than the threshold of PS load difference between UMTS and GSM (Mbsc3G2GLdBlcPsDeltaThrd (BSC6900,BSC6910)).
The RNC initiates the handover to the best GSM candidate cell.
4.1.2 Inter-RAT Handover based on Hierarchical Cell Structure Enhancement When the indication of non-coverage-based handover based on GSM load (MBSCNcovHoOn2GldInd(BSC6900,BSC6910)) is set to ON, the handover to the GSM cell is triggered when the traffic load on the UMTS cell is high. The RNC performs the handover decision depending on the load on the neighboring GSM cell. For the CS service, a GSM candidate cell must meet the following conditions: l
The cell supports the inter-RAT handover for CS services.
l
The load on the cell is lower than the CS outgoing inter-RAT handover GSM load threshold (CSHOOut2GloadThd(BSC6910,BSC6900)).
For the PS service, a GSM candidate cell must meet the following conditions: l
The cell supports the inter-RAT handover for PS services.
l
The load on the cell is lower than the PS outgoing inter-RAT handover GSM load threshold (PSHOOut2GloadThd(BSC6900,BSC6910)).
4.2 GSM Handover Based on Load Enhancement The GSM handover based on load enhancement function corresponds to the feature GBFD-511101 Load Based Handover Enhancement on Iur-g. When the inter-RAT load handover switch (OutSysLoadHoEn) is set to ON, the load-based handover from GSM to UMTS is triggered if the load on the GSM cell reaches load handover threshold and the Service Handover attribute of the current service is not "handover to UTRAN or cdma2000 shall not be performed". The candidate neighboring UMTS cell must meet the following conditions: l
The value of (G2GLoadAdjustCoeff x Current load of the GSM serving cell – 10 x Load of the neighboring UMTS cell) is greater than or equal to the value of (10 x G2G3GldBlcDeltaThrd – 1000).
l
If the neighboring UMTS cell is an FDD cell and FDDREP is set to RSCP(RSCP), this cell must meet the following conditions: – InterRATLoadHoRSCPStart - A < CPICH RSCP < InterRATLoadHoRSCPStart – CPICH RSCP > IntRATLoadHORSCPThr In the preceding formula, A is the load handover bandwidth. A = (1 + T/ IntRATLoadHoPeriod) x InterRATLoadHoRSCPStep
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– T is the load handover timer and this timer is started when the load of the serving cell is greater than the value of the TRIGTHRES parameter. – The maximum value of A cannot exceed the value of theInterRATLoadHoRSCPBandWidth parameter. l
If the neighboring UMTS cell is an FDD cell and FDDREP is set to Ec/N0(Ec/N0), this cell must meet the following conditions: – InterRATLoadHoEcNoStart – A < CPICH Ec/No < InterRATLoadHoEcNoStart – CPICH Ec/No > IntRATLoadHOEcNoThr In the preceding formula, A is the load handover bandwidth. A = (1 + T/ IntRATLoadHoPeriod) x InterRATLoadHoEcNoStep – T is the load handover timer and this timer is started when the load of the serving cell is greater than the value of the TRIGTHRES parameter. – The maximum value of A cannot exceed the value of the InterRATLoadHoEcNoBandWidth parameter.
After the preceding selection, unqualified neighboring UMTS cells are removed from the candidate cell list. If the generated candidate cell list is not null, the BSC initiates the handover to the optimal candidate UMTS cell.
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SingleRAN Common Radio Resource Management Feature Parameter Description
5 Service Distribution
5
Service Distribution
5.1 UMTS-to-GSM Service Distribution The UMTS-to-GSM service distribution function corresponds to the feature WRFD-070007 GSM and UMTS Traffic Steering Based on Iur-g. In UMTS-to-GSM service distribution, the users in the UMTS network are handed over to a GSM target cell that is not congested. The UMTS-to-GSM service distribution can be performed in either of the following phases: l
CS service distribution during RRC setup: During the RRC setup, the CS AMR services are redirected to the GSM cell.
l
Service distribution after RAB setup: After the RAB is set up, the CS or PS services are handed over to the GSM cell.
5.1.1 CS Service Distribution During RRC Setup If the CS service is initiated during the RRC setup stage and the service distribution and load balancing algorithm switch (MBSCServiceDiffLdbSwitch(BSC6900,BSC6910)) is set to SERVICE-BASED, the service distribution is performed as shown in Figure 5-1.
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Figure 5-1 UMTS-to-GSM service distribution during the RRC setup
When the RRC is redirected, a GSM candidate cell must meet the following conditions: l
The GSM cell is in operation.
l
The cell supports the inter-RAT handover for CS services.
l
The uplink and downlink load of the cell is in normal state.
The RNC initiates the redirection to the best GSM candidate cell. If no cell is suitable among the neighboring GSM cells, the UE accesses the UMTS cell.
5.1.2 Service Distribution After RAB Setup After RAB setup, if the service distribution and load balancing algorithm switch (MBSCServiceDiffLdbSwitch(BSC6900,BSC6910)) is set to SERVICE-BASED and the Service Handover attribute carried in the assignment request from the MSC is "Handover to GSM should be performed", service distribution is performed as shown in Figure 5-2.
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Figure 5-2 UMTS-to-GSM service distribution after RAB setup
For single CS/PS services, the RNC selects cells that meet the following conditions from the neighboring cells, and then sends the measurement control to the UEs so that the UEs perform the 3C event measurement to those cells. l
The GSM cell is in operation.
l
The cell supports the inter-RAT handover for CS and PS services.
l
The uplink and downlink load of the cell is in normal state.
If any cell meets the 3C event reporting conditions, the UE reports the 3C event to the RNC, and then this cell is taken as a candidate cell. If there are multiple candidate cells, the RNC initiates the handover to the best GSM candidate cell. If no qualified cell is available among the neighboring GSM cells, the UE is retained in the UMTS cell.
5.2 GSM-to-UMTS Service Distribution The GSM-to-UMTS service distribution function corresponds to the feature GBFD-511104 GSM and UMTS Traffic Steering Based on Iur-g. Issue 02 (2013-11-15)
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l
If the inter-RAT load handover switch (InterRatServiceLoadHoSwitch) is set to Cn Service-based and the Service Handover attribute carried in the assignment request from the MSC is "handover to UTRAN or cdma2000 should be performed", the BSC imitates the directed retry to the UMTS.
l
If the inter-RAT load handover switch (InterRatServiceLoadHoSwitch) is set to Servicebased and the Service UTRAN CCO attribute of PS UEs is not "Network initiated cell change order to UTRAN or PS handover to UTRAN procedure shall not be performed", PS UEs can be handed over to UMTS cells through PS handovers or cell reselections. The PS handover is preferentially performed. Before selecting the target UMTS cell for a handover or cell reselection, this feature obtains the load status of all neighboring UMTS cells and removes the cells in the basic congestion or overload congestion state from the candidate list.
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6 Load Balancing
6
Load Balancing
6.1 UMTS Load Balancing The UMTS load balancing function corresponds to the feature WRFD-070006 GSM and UMTS Load Balancing Based on Iur-g. With UMTS load balancing, the CS AMR services and the low-rate PS services are handed over from a UMTS cell to a GSM cell when the GSM cell load is in normal state. The UMTS load balancing can be performed in either of the following phases: l
Load balancing during RRC setup: During the setup of the RRC connection, the CS AMR services are redirected to the GSM cell.
l
Load balancing after RAB setup: After the RAB is set up, the single CS or PS services are handed over to the GSM cell.
Generally, actual traffic load is used during UMTS load balancing. If the load reporting function is not enabled, equivalent number of users (ENU) is used during UMTS load balancing.
6.1.1 Load Balancing During RRC Setup If the CS AMR service is initiated during the RRC setup stage and the service distribution and load balancing algorithm switch (MBSCServiceDiffLdbSwitch(BSC6900,BSC6910)) is set to LOAD-BASED, the service distribution is performed as shown in Figure 6-1.
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Figure 6-1 UMTS load balancing during RRC setup
The RNC selects the neighboring GSM cells that meet the following conditions as candidate cells: l
The GSM cell is in operation.
l
The uplink and downlink load in the GSM cell is not in overload congestion state.
l
The cell supports the inter-RAT handover for CS services.
l
The load of UMTS source cell minus the load of the cell is higher than the threshold of CS load difference between UMTS and GSM (Mbsc3G2GLdBlcCsDeltaThrd (BSC6900,BSC6910)).
The RNC initiates the redirection to the best GSM candidate cell. If no cell is suitable among the neighboring GSM cells, the UE accesses the UMTS cell.
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6.1.2 Load Balancing After RAB Setup Figure 6-2 UMTS load balancing after RAB setup
If the service distribution and load balancing algorithm switch (MBSCServiceDiffLdbSwitch (BSC6900,BSC6910)) is set to LOAD-BASED and the Service Handover attribute carried in the assignment request from the MSC is "Handover to GSM should be performed", load balancing is performed. The RNC selects the cells that meet the following conditions from the neighboring cells, and then sends the measurement control to the UEs so that the UEs perform the 3C event measurement to those cells. l
The GSM cell is in operation.
l
The uplink and downlink load in the GSM cell is not in overload congestion state.
l
For the CS service, the GSM cell supports incoming inter-RAT handover for CS services and the load of UMTS source cell minus the load of the GSM cell is higher than the threshold of CS load difference between UMTS and GSM (Mbsc3G2GLdBlcCsDeltaThrd (BSC6900,BSC6910)). For the PS service, the GSM cell supports incoming inter-RAT handover for PS services and the load of UMTS source cell minus the load of the GSM cell is higher than the threshold of PS load difference between UMTS and GSM (Mbsc3G2GLdBlcCsDeltaThrd(BSC6900,BSC6910)).
If any cell meets the 3C event reporting conditions, the UE reports the 3C event to the RNC, and then this cell is taken as a candidate cell. If there are multiple candidate cells, the RNC Issue 02 (2013-11-15)
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initiates the handover to the best GSM candidate cell. If no qualified cell is available among the neighboring GSM cells, the UE is retained in the UMTS cell.
6.2 GSM Load balancing The GSM load balancing function corresponds to the feature GBFD-511103 GSM and UMTS Load Balancing Based on Iur-g. Load balancing can be enabled by setting the inter-RAT load handover switch (InterRatServiceLoadHoSwitch) to Load-based. Based on the load in the target UMTS cells, the UEs in the GSM network are handed over to the UMTS cells. During the call setup, the GSM-to-UMTS load balancing is performed through directed retry, as shown in Figure 6-3. Figure 6-3 GSM load balancing
The BSC performs load balancing when the Service Handover attribute carried in the channel assignment request from the MSC is "handover to UTRAN or cdma2000 should be performed" and the uplink and downlink load on the GSM cell that carries the service is not in normal state. The BSC selects the neighboring UMTS cells that meet the following conditions as candidate cells: l
The UMTS cell is in operation.
l
The uplink load and downlink load in the UMTS cell is not in overload congestion state.
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l
6 Load Balancing
The load of GSM source cell minus the load of the cell is higher than the threshold of CS load difference between UMTS and GSM (G2G3GLdBlcDeltaThrd).
The BSC initiates the redirection to the best UMTS candidate cell. If no cell is suitable among the neighboring UMTS cells, the UE accesses the GSM cell. If the inter-RAT load handover switch (InterRatServiceLoadHoSwitch) is set to Dynamic Service/Load-based and the serving cell is in load congestion, the BSC selects a suitable cell according to the preceding procedure for the UE to access.
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7
7 NACC Procedure Optimization
NACC Procedure Optimization
The NACC procedure optimization function corresponds to the feature MRFD-211401 NACC Procedure Optimization, and the feature WRFD-070005 NACC Procedure Optimization Based on Iur-g between GSM and UMTS. To perform NACC in the PS domain, the UMTS cell needs to obtain the system information related to the GSM cell. If the UMTS cell and the GSM cell are operated by the same MBSC, system information related to the GSM cell can be obtained through internal information transfer rather than through the core network. This reduces the signaling load on the SGSN and makes the cell reselection operation faster. In a common NACC procedure, when the RNC needs to obtain the system information related to a GSM cell, it sends a RAN INFORMATION REQUEST message to the SGSN. The SGSN then identifies the BSC that serves the target GSM cell, and then forwards the message to this target BSC. The response message, RAN INFORMATION, from the BSC is sent to the RNC through the SGSN. The signaling procedure is illustrated in Figure 7-1. Figure 7-1 Normal NACC procedure
In the optimized NACC procedure, the SGSN is not involved. If the UMTS cell and the target GSM cell are operated by the same MBSC, the RNC sends the INFORMATION EXCHANGE INITIATION REQUEST message to the BSC through an internal message. In addition, the BSC sends the response message through the internal message. The signaling procedure is illustrated in Figure 7-2. Issue 02 (2013-11-15)
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7 NACC Procedure Optimization
Figure 7-2 Optimized NACC procedure
When using this optimized NACC procedure, provided by the Co-RRM feature, the SGSN is not involved in the NACC procedure, so the execution time for the NACC procedure is reduced. In addition, the signaling load on the SGSN is reduced.
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8 Engineering Guidelines
Engineering Guidelines
8.1 Iur-g Configuration and Maintenance Before enabling features described in the preceding chapters, you must configure the Iur-g interface. This section describes how to configure and maintain the Iur-g interface.
8.1.1 Requirements Table 8-1 lists requirements on software and hardware. Table 8-1 Requirements on software and hardware Item
Requirements
MBSC software version
V900R011C00SPC720 or later versions
MBSC software license
None
MBSC hardware
Two IP interface boards must be configured. Alternatively, only one IP interface board is required if interface board backup is not to be applied.
8.1.2 Data Preparation Table 8-2 lists data to be configured on the Iur-g interface.
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Table 8-2 Data to be configured on the Iur-g interface
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Parameter Name
Parameter ID
Description
Setting Notes
BSC/RNC
Subrack No.
SRN (BSC6900, BSC6910)
Number of the subrack that houses an interface board
The parameter setting is determined before feature deployment.
Slot No.
SN (BSC6900, BSC6910)
Slot number of an interface board
The parameter setting is determined before feature deployment.
Backup
RED (BSC6900, BSC6910)
Whether to back up an interface board
The parameter setting is determined before feature deployment.
MPU Subrack No.
MPUSUBRAC K
Number of the subrack where the MPU subsystem is located
This parameter specifies the number of the subrack housing the MPU subsystem that manages the interface boards. You can run the LST BRD command to query the number of subrack that houses a board whose logical function type is GSM RNC control plane process (RGCP).
MPU Slot No.
MPUSLOT
Number of the slot where the MPU subsystem is located
This parameter specifies the number of the slot housing the MPU subsystem that manages the interface boards
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Parameter Name
Parameter ID
Description
Setting Notes
Board type
BRDTYPE (BSC6900, BSC6910)
Type of an interface board that carries services on the Iur-g interface
The interface board must be an FG2a, FG2c, GOUa, or GOUc. Configure the interface board according to onsite situations.
Port NO.
PN (BSC6900, BSC6910)
Port number of an interface board
This parameter specifies the port number that is bound to the IP address of an interface board. There are eight Ethernet ports on an interface board. You can use the port number of one Ethernet port.
Local IP address
IPADDR (BSC6900, BSC6910)
Port address of an interface board
The parameter setting is determined by the operator's plan and the IP address specified by this parameter is used by the RNC or BSC to receive and transmit Iur-g signaling messages.
Mask
MASK (BSC6900, BSC6910)
Subnet mask of the port address of an interface board
The parameter setting is determined by the operator's plan.
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Parameter Name
Parameter ID
Description
Setting Notes
Destination IP Address
DSTIP (BSC6900, BSC6910)
IP address of the network segment where the destination IP address belongs
(Optional) The parameter setting is determined by the operator's plan and the IP address specified by this parameter is used by the RNC to receive and transmit Iurg signaling messages.
Destination address mask
DSTMASK (BSC6900, BSC6910)
Subnet mask of the destination IP address
(Optional) The parameter setting is determined by the operator's plan.
NextHop
NEXTHOP (BSC6900, BSC6910)
IP address of the next hop corresponding to the destination IP address
(Optional) This parameter specifies the IP address of the gateway at this network segment.
OSP index
SPX (BSC6900, BSC6910)
Originating signaling point index on the BSC or RNC side
You can use one of the multiple OSPs.
Signaling link ID
SIGLNKID (BSC6900, BSC6910)
ID of the SCTP signaling links
The parameter setting is determined by the operator's plan. You can use one of multiple SCTP link IDs configured.
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Parameter Name
Parameter ID
Description
Setting Notes
First destination IP address
PEERIP1 (BSC6900, BSC6910)
First IP address for carrying Iurg signaling on the RNC or BSC side
The parameter setting is determined by the operator's plan and the IP address specified by this parameter is used by the RNC or BSC to receive and transmit Iur-g signaling messages.
Destination SCTP port No.
PEERPN (BSC6900, BSC6910)
Destination SCTP port number for carrying Iur-g signaling on the RNC or BSC side
The parameter setting is determined by the operator's plan and the port number specified by this parameter is used by the RNC or BSC to receive and transmit Iur-g signaling messages.
DPC Code
DPC (BSC6900, BSC6910)
Code of the destination point for Iur-g connection on the RNC or BSC side
The parameter setting is determined by the operator's plan and corresponds to the originating signaling point on the RNC or BSC side.
8.1.3 Configuring the Iur-g Interface Configuring Interface Boards on the BSC and RNC Sides Run the ADD BRD command to add an interface board on the BSC and RNC sides, respectively. The following is an example: Issue 02 (2013-11-15)
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ADD BRD: SRN=0, BRDCLASS=INT, BRDTYPE=FG2a, LGCAPPTYPE=IP, SN=14, RED=YES, MPUSUBRACK=0, MPUSLOT=0;
Configuring IP Transmission Data on the BSC and RNC Sides Perform the following steps to configure IP transmission data on the BSC and RNC sides, respectively: Step 1 Run the SET ETHPORT command to set the Ethernet port type, which uses the default value in most cases. In this command, the Ethernet port is an FE. The following is an example: SET ETHPORT: SRN=0, SN=14, BRDTYPE=FG2a, PTYPE=FE, PN=0;
Step 2 Run the ADD ETHIP command to add an IP address for this port. The following is an example: ADD ETHIP: SRN=0, SN=14, PN=0, IPINDEX=0, IPADDR="10.0.0.2", MASK="255.255.255.0";
Step 3 (Optional) Run the ADD IPRT command to add an IP route. The following is an example: ADD IPRT: SRN=0, SN=14, DSTIP="10.161.106.0", DSTMASK="255.255.255.0", NEXTHOP="10.161.105.1", PRIORITY=HIGH, REMARK="test";
----End NOTE
The IP route must be configured for different network segments. In this command, the destination IP address is the IP address of the network segment where this destination IP address belongs. For example, if the destination IP address is 10.161.106.208 and the destination mask is 255.255.255.0, the destination IP address is 10.161.106.0 and the next hop is the IP address of the gateway at this network segment (10.161.105.1).
Configuring Signaling Links on the BSC and RNC Sides Perform the following steps to configure signaling links on the BSC and RNC sides, respectively: Step 1 Run the ADD N7DPC command to add a DSP. The following is an example: ADD N7DPC: NAME="Iur-g-test", DPX=0, SPX=0, SPDF=WNF, DPC=H'A3, DPCT=IUR_G, BEARTYPE=M3UA;
Step 2 Run the ADD M3LE command to add an MTP3-User Adaptation Layer (M3UA) local entity. The following is an example: ADD M3LE: LENO=0, SPX=0, ENTITYT=M3UA_IPSP, NAME="Iur-g-m3le";
Step 3 Run the ADD M3DE command to add an M3UA destination entity. The following is an example: ADD M3DE: DENO=0, LENO=0, DPX=0, ENTITYT=M3UA_IPSP, NAME="Iur-g-m3de";
Step 4 Run the ADD M3LKS command to add an M3UA link set. The following is an example: ADD M3LKS: SIGLKSX=0, DENO=0, WKMODE=M3UA_IPSP, NAME="Iur-g-m3lks";
Step 5 Run the ADD M3RT command to add an M3UA route. The following is an example: ADD M3RT: DENO=0, SIGLKSX=0, NAME="Iur-g-m3rt";
Step 6 Run the ADD SCTPLNK command to add a Signaling Control Transmission Protocol (SCTP) link. The following is an example: ADD SCTPLNK: SRN=0, SN=14, SCTPLNKN=0, MODE=CLIENT, APP=M3UA, LOCIP1="10.0.0.2", PEERIP1="10.0.0.1", PEERPN=2905, LOGPORTFLAG=NO, VLANFLAG1=DISABLE, VLANFlAG2=DISABLE, SWITCHBACKFLAG=YES;
Step 7 Run the ADD M3LNK command to add an M3UA link. The following is an example: Issue 02 (2013-11-15)
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ADD M3LNK: SIGLKSX=0, SIGLNKID=0, SCTPLNKID=0, SN=14, SCTPLNKN=0, NAME="Iur-gm3lnk";
----End
Configuring Common Measurement Data on the BSC Side Step 1 Run the ADD GNRNC command to configure a neighboring RNC for the BSC with CoMBSC set to NO(No) and Allow Info Exchange at Iur-g set to YES(Support). Step 2 Run the ADD GEXT3GCELL command to configure an external UMTS cell for the BSC. You can run the LST UCELL command to query the basic information about the configured external UMTS cell. To query the basic information about multiple external UMTS cells, run this command for each cell you want to query. Step 3 Run the ADD G3GNCELL command to configure a UMTS neighboring cell for a GSM cell with Source Cell Index set to an internal GSM cell and Neighbor Cell Index set to an external UMTS cell. To add multiple UMTS neighboring cells, run this command for each cell you want to add. Step 4 Run the ADD GIURGCONN command to add an Iur-g connection with Connection Type set to EXTERNAL(External RNC). In addition, in this step, set Subrack No., Slot No., and Subsystem No. based on the slot number, subrack number, and subsystem number of the SPU that initiates the Iur-g connection on the BSC side. ----End
Configuring Common Measurement Data on the RNC Side Step 1 Run the ADD UNBSC command to configure a neighboring BSC for this RNC. You can set Neighboring BSC Index according to onsite conditions. Step 2 Run the ADD UEXT2GCELL command to configure an external GSM cell for this RNC. You can run the LST GCELL command to query the basic information about the configured external GSM cell. To query the basic information about multiple external GSM cells, run this command for each cell you want to query. Step 3 Run the ADD U2GNCELL command to configure a neighboring GSM cell for a UMTS cell with Cell ID set to an internal UMTS cell and GSM Cell Index set to an external GSM cell. To add multiple neighboring GSM cells, run this command for each cell you want to add. Step 4 Run the ADD UIURGCONN command to add an Iur-g connection with Intra-MBSC Indication set to False. In addition, in this step, set Subrack No., Slot No., and Subsystem No. based on the slot number, subrack number, and subsystem number of the SPU that initiates the Iur-g connection on the RNC side. ----End
8.1.4 Maintaining the Iur-g Interface Checking Port Connectivity Run the PING IP command to check whether the IP address of the port on the interface board is accessible. The following is an example: PING IP: SRN=0, SN=14, SIPADDR="10.0.0.1", DESTIP="10.0.0.2";
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Checking the Connectivity of DSP Run the DSP N7DPC command to check whether the DSP is accessible. The following is an example: DSP N7DPC: DPX=0, TOSPECSSN=NO;
8.2 Deployment of Handover Based on Load Enhancement This section describes how to activate, verify, and deactivate the optional feature MRFD-211404 MBSC Handover based on Load Enhancement, WRFD-070004 Load Based GSM and UMTS Handover Enhancement Based on Iur-g, GBFD-511101 Load Based Handover Enhancement on Iur-g.
Requirements l
Hardware – The BSC is the MBSC. – A GSM+UMTS dual-mode MS is required. – The interface board that supports IP transmission is configured.
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Other features Configurations of other features on which this feature depends are complete. – MRFD-211404 MBSC Handover based on Load Enhancement depends on features WRFD-020306 Inter-RAT Handover Based on Load or WRFD-021200 HCS (Hierarchical Cell Structure). – WRFD-070004 Load Based GSM and UMTS Handover Enhancement Based on Iur-g depends on features GBFD-511101 Load Based Handover Enhancement on Iur-g, WRFD-020306 Inter-RAT Handover Based on Load or WRFD-021200 HCS (Hierarchical Cell Structure). – GBFD-511101 Load Based Handover Enhancement on Iur-g depends on features WRFD-070004 Load Based GSM and UMTS Handover Enhancement Based on Iur-g and GBFD-114322 GSM/WCDMA Load Based Handover.
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License – The license "MBSC Handover based on Load Enhancement" on the BSC side has been activated. For details about the license items and how to activate the license, see License Management Feature Parameter Description.
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Others – Both the 2G network and the 3G network are deployed. – IP transmission mode is used on the Iur-g interface. – A GSM cell and a UMTS cell are configured, and the GSM cell is configured as a neighboring cell of the UMTS cell. – Data is negotiated and planned for the intra-BSC Iur-g interface.
Activation l Issue 02 (2013-11-15)
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Step 1 Run the RNC MML command SET UMBSCCRRM to enable the non-coverage-based handover. In this step, set Non-coverage handover based on 2G load Indication to ON, Adjustment Coefficient of 2G Load Value to 1 and Load-base handover based on 3G2G load difference Indication to ON. Step 2 Run the RNC MML command SET UCORRMALGOSWITCH to enable the inter-RAT handover. In this step, select HO_INTER_RAT_CS_OUT_SWITCH and HO_INTER_RAT_PS_OUT_SWITCH in the HandOver switch drop-down list box. Step 3 Run the RNC MML command MOD UCELLALGOSWITCH to enable UL and DL load reshuffling (LDR) on the Uu interface. In this step, select UL_UU_LDR(Uplink UU LDR Algorithm) and DL_UU_LDR(Downlink UU LDR Algorithm) in the Switch for Cell Load Control drop-down list box. Step 4 Run the RNC MML command MOD UCELLLDR to configure LDR actions. In this step, set DL LDR first action and UL LDR first action to CSInterRatShouldBeLDHO(CS domain inter-rat should be load handover); set DL LDR second action and UL LDR second action to PSInterRatShouldBeLDHO(PS domain inter-rat should be load handover); set DL LDR third action and UL LDR third action to CSInterRatShouldNotLDHO(CS domain inter-rat should not be load handover); set DL LDR fourth action and UL LDR fourth action to PSInterRatShouldNotLDHO(PS domain inter-rat should not be load handover). ----End NOTE
You need to configure UL and DL LDR actions according to the actual situation.
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Configuration on the BSC side
Step 1 Run the BSC MML command SET GCELLHOBASIC to enable inter-RAT handovers. In this step, set Inter-RAT Out BSC Handover Enable and Inter-RAT In BSC Handover Enable to YES(Yes). Step 2 Run the BSC MML command SET GCELLHOINTERRATLDB to enable Allow Inter-RAT Load HO in Connect State. In this step, set Allow Inter-RAT Load HO in Connect State to YES(Yes) and 2G Load Adjustment Coefficient to 10. ----End
Verification NOTE
If the verification achieves the following results as expected, the configuration succeeds. Otherwise, the configuration fails.
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3G-to-2G Load Based Handover Enhancement NOTE
The verification can be done when only the UMTS cell is in the basic congestion state.
Use a dual-mode MS to call a fixed telephone in the UMTS cell. Trace signaling on the Iu interface on the LMT. RANAP_RELOCATION_REQUIRED message is reported. The RANAP_RELOCATION_REQUIRED message contains reduce-load-in-serving-cell. Trace signaling on the A interface on the LMT. Handover Request message is reported. The Handover Request message contains reduce-load-in-serving-cell. Issue 02 (2013-11-15)
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NOTE
After the verification, set the value of system to the value before the verification.
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2G-to-3G Load Based Handover Enhancement
Step 1 Use an MS to initiate a call in the GSM cell, and the call is successfully established. Step 2 When the GSM cell is in the basic congestion state, the MS is handed over to a 3G neighbor cell. Trace signaling on the A interface. Check that Assignment Request, Handover Required, and Handover Command messages are reported and cause in the Handover Required message is directed-retry(13). ----End
Deactivation l
Configuration on the RNC side Run the RNC MML command SET UMBSCCRRM to deactivate MBSC Handover based on Load Enhancement on the UMTS side. In this step, set Non-coverage handover based on 2G load Indication to OFF(OFF) and Load-base handover based on 3G2G load difference Indication to OFF(OFF).
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Configuration on the BSC side Run the BSC MML command SET GCELLHOINTERRATLDB to deactivate MBSC Handover based on Load Enhancement on the GSM side. In this step, set Allow Inter-RAT Load HO in Connect State to NO(No).
MML Command Examples //Activating Handover based on Load Enhancement //Configuration on the RNC side /Enabling the non-coverage-based handover/ SET UMBSCCRRM: MbscNcovHoOn2GldInd=ON, LoadHoOn3G2GldInd=ON; /Enabling the inter-RAT handover/ SET UCORRMALGOSWITCH: HoSwitch=HO_INTER_RAT_CS_OUT_SWITCH-1&HO_INTER_RAT_PS_OUT_SWITCH-1; /Enabling UL and DL load reshuffling (LDR) on the Uu interface/ MOD UCELLALGOSWITCH: CellId=0, NBMLdcAlgoSwitch=UL_UU_LDR-1&DL_UU_LDR-1; /Configuring LDR actions/ MOD UCELLLDR: CellId=0, DlLdrFirstAction=CSInterRatShouldBeLDHO, DlLdrSecondAction=PSInterRatShouldBeLDHO, DlLdrThirdAction=CSInterRatShouldNotLDHO, DlLdrFourthAction=PSInterRatShouldNotLDHO, UlLdrFirstAction=CSInterRatShouldBeLDHO, UlLdrSecondAction=PSInterRatShouldBeLDHO, UlLdrThirdAction=CSInterRatShouldNotLDHO, UlLdrFourthAction=PSInterRatShouldNotLDHO; //Configuration on the BSC side /Enabling the inter-RAT handover/ SET GCELLHOBASIC: IDTYPE=BYID, CELLID=0, INTERRATOUTBSCHOEN=YES, INTERRATINBSCHOEN=YES; /Setting 2G Load Adjustment Coefficient/ SET GCELLHOINTERRATLDB: IDTYPE=BYID, CELLID=0, G2GLoadAdjustCoeff=10; //Deactivating Handover based on Load Enhancement //Configuration on the RNC side SET UMBSCCRRM: MbscNcovHoOn2GldInd=OFF, LoadHoOn3G2GldInd=OFF; //Configuration on the BSC side SET GCELLHOINTERRATLDB: IDTYPE=BYID, CELLID=0, OutSysLoadHoEn=OFF;
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8.3 Deployment of MBSC Service Distribution This section describes how to activate, verify, and deactivate the optional features MRFD-211403 MBSC Service Distribution, WRFD-070007 GSM and UMTS Traffic Steering Based on Iur-g, and GBFD-511104 GSM and UMTS Traffic Steering Based on Iur-g.
Requirements l
Hardware – The BSC is MBSC. – The MS is in GSM+UMTS dual mode. – The interface board that supports IP transmission is configured.
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Other features Configurations of other features on which this feature depends are complete. – MRFD-211403 MBSC Service Distribution depends on features WRFD-020400 DRD Introduction Package and WRFD-020305 Inter-RAT Handover Based on Service. – WRFD-070007 GSM and UMTS Traffic Steering Based on Iur-g depends on features GBFD-511104 GSM and WCDMA Traffic Steering Based on Iur-g, WRFD-020400 DRD Introduction Package and WRFD-020305 Inter-RAT Handover Based on Service. – GBFD-511104 GSM and UMTS Traffic Steering Based on Iur-g depends on features GBFD-114321 GSM/WCDMA Service Based Handover, WRFD-070007 GSM and WCDMA Traffic Steering Based on Iur-g, and GBFD-119502 PS Handover/ GBFD-116201 Network-Controlled Cell Reselection (NC2).
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License The license "MBSC Service Distribution" on the BSC side has been activated. For details about the license items and how to activate the license, see License Management Feature Parameter Description
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Others – 2G and 3G networks cover the same area. – IP transmission mode is used on the Iur-g interface. – The value of the information element (IE) Service Handover in the RAB ASSIGNMENT REQUEST message sent from the CN to the RNC is Handover to GSM should be performed. – The value of the IE Service Handover in the ASSIGNMENT REQUEST message sent from the CN to the BSC is Handover to UTRAN or cdma2000 should be performed or Handover to UTRAN or cdma2000 should not be performed. – A GSM cell and a UMTS cell are configured, and the GSM cell is configured as a neighboring cell of the UMTS cell. – Data is negotiated and planned for the intra-BSC Iur-g interface. NOTE
The licenses on the BSC and RNC sides are activated separately.
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Activation l
Configuration on the RNC side
Step 1 Run the RNC MML command SET UMBSCCRRM to enable traffic steering. In this step, set Service Distribution and Load Balancing Switch to SERVICE-BASED(SERVICEBASED) and Adjustment Coefficient of 2G Load Value to 1. Step 2 Run the RNC MML command SET UCORRMALGOSWITCH to enable the inter-RAT handover. In this step, select HO_INTER_RAT_CS_OUT_SWITCH and HO_INTER_RAT_PS_OUT_SWITCH under the HandOver switch parameter. Step 3 Run the RNC MML command ADD UCELLHOCOMM to enable the inter-RAT CS and PS handover. In this step, set both Inter-RAT CS Handover Switch and Inter-RAT PS Handover Switch to ON. Run the ADD UCELLHOCOMM command to enable inter-RAT CS and PS handover for each cell. ----End l
Configuration on the BSC side
Step 1 Run the BSC MML command SET GCELLHOBASIC to enable the inter-RAT handover. In this step, set Inter-RAT Out BSC Handover Enable and Inter-RAT In BSC Handover Enable to YES(Yes). Step 2 Run the BSC MML command SET GCELLHOINTERRATLDB to enable traffic steering. In this step, set Allow Inter-RAT Load HO in Access State to Service-based(Service-based). ----End
Verification l
3G-to-2G Traffic Steering NOTE
The verification can be done when only the UMTS cell is in the basic congestion state.
Use a dual-mode MS to call a fixed telephone in the UMTS cell. Initiate Iu-interface tracing on the LMT. You can find that the RANAP_RELOCATION_REQUIRED message is reported and the handover cause value in the message is resource-optimization-relocation. Initiate A interface tracing. You can find that the Handover Request message is reported and the handover cause value in the message is traffic. NOTE
Ensure that the GSM cell is not in the congestion state.
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2G-to-3G Traffic Steering NOTE
The verification can be done when only the GSM cell is in the basic congestion state.
Use a dual-mode MS to call a fixed telephone in the GSM cell. Trace the CS domain messages of a single subscriber on the LMT. Check whether the call stays in the GSM cell and is not handed over to UMTS cells. Use a dual-mode MS to initiate a PS service in the GSM cell. Trace the PS domain messages of a single subscriber on the LMT. Check whether the MS is switched to UMTS cells through handovers or through cell reselection. Issue 02 (2013-11-15)
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If a PFM-PS-HANDOVER-REQUIRED message is reported on the Gb interface, the dualmode MS is switched to UMTS cells through handovers.
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If a Packet Cell Change Order message is reported on the Um interface, the dual-mode MS is switched to UMTS cells through cell reselection.
Deactivation Configuration on the RNC side Run the RNC MML command SET UMBSCCRRM to deactivate traffic steering. In this step, set Service Distribution and Load Balancing Switch to OFF(OFF).
MML Command Examples //Activating 3G-to-2G traffic steering //Configuration on the RNC side /Enabling traffic steering/ SET UMBSCCRRM: MbscServiceDiffLdbSwitch=SERVICE-BASED; /Enabling inter-RAT handover/ SET UCORRMALGOSWITCH: HoSwitch=HO_INTER_RAT_CS_OUT_SWITCH-1&HO_INTER_RAT_PS_OUT_SWITCH-1; /Enabling inter-RAT CS and PS handover/ ADD UCELLHOCOMM: CellId=1, CSServiceHOSwitch=ON, PSServiceHOSwitch=ON; //Configuration on the BSC side /Enabling inter-RAT incoming BSC handover/ SET GCELLHOINTERRATLDB: IDTYPE=BYID, CELLID=0, InterRatServiceLoadHoSwitch=Servicebased; //Deactivating 3G-to-2G traffic steering //Configuration on the RNC side SET UMBSCCRRM: MbscServiceDiffLdbSwitch=OFF //Configuration on the BSC side SET GCELLHOINTERRATLDB: IDTYPE=BYID, CELLID=0, InterRatServiceLoadHoSwitch=OFF;
8.4 Deployment of MBSC Load Balancing This section describes how to activate, verify, and deactivate the optional feature MRFD-211402 MBSC Load Balancing, WRFD-070006 GSM and UMTS Load Balancing Based on Iur-g, GBFD-511103 GSM and UMTS Load Balancing Based on Iur-g.
Requirements l
Hardware – The BSC is MBSC. – The MS is in GSM+UMTS dual mode. – The interface board that supports IP transmission is configured.
l
Other features Configurations of other features on which this feature depends are complete. – MRFD-211402 MBSC Load Balancing depends on features WRFD-020400 DRD Introduction Package and WRFD-020305 Inter-RAT Handover Based on Service. – WRFD-070006 GSM and UMTS Load Balancing Based on Iur-g depends on features WRFD-020400 DRD Introduction Package and WRFD-020305 Inter-RAT Handover Based on Service.
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– GBFD-511103 GSM and UMTS Load Balancing Based on Iur-g depends on features GBFD-114322 GSM/WCDMA Load Based Handover or WRFD-070006 GSM and UMTS Load Balancing Based on Iur-g. l
License The license "MBSC Load Balancing" on the BSC side has been activated. For details about the license items and how to activate the license, see License Management Feature Parameter Description.
l
Others – 2G and 3G networks cover the same area. – IP transmission mode is used on the Iur-g interface. – The value of the information element (IE) Service Handover in the RAB ASSIGNMENT REQUEST message sent from the CN to the RNC is Handover to GSM should be performed. – The value of the IE Service Handover in the ASSIGNMENT REQUEST message sent from the CN to the BSC is Handover to UTRAN or cdma2000 should be performed. – A GSM cell and a UMTS cell are configured, and the GSM cell is configured as a neighboring cell of the UMTS cell. – Data is negotiated and planned for the intra-MBSC Iur-g interface. NOTE
The licenses on the BSC and RNC sides are activated separately.
Activation l
Configuration on the RNC side
Step 1 Run the RNC MML command SET UMBSCCRRM to enable load balancing and set load difference thresholds. In this step, set Service Distribution and Load Balancing Switch to LOAD-BASED(LOAD-BASED), Load Difference Threshold Between 3G And 2G of CS Service to 10, PS Load Difference Threshold Between 3G And 2G of Ps Service to 30, and Adjustment Coefficient of 2G Load Value to 1. Step 2 Run the RNC MML command SET UCORRMALGOSWITCH to enable the inter-RAT handover. In this step, select HO_INTER_RAT_CS_OUT_SWITCH and HO_INTER_RAT_PS_OUT_SWITCH under the HandOver switch parameter. ----End l
Configuration on the BSC side
Step 1 Run the BSC MML command SET GCELLHOBASIC to enable inter-RAT incoming BSC handover. In this step, set Inter-RAT In BSC Handover Enable and Intra-RAT In BSC Handover Enable to YES(Yes). Step 2 Run the BSC MML command SET GCELLHOINTERRATLDB. In this step, set Allow InterRAT Load HO in Access State to Load-based(Load-based), 2G Load Adjustment Coefficient to 10. Step 3 Run the BSC MML command SET OTHSOFTPARA. In this step, set CS 2G 3G Load Balance Delta Threshold to 110. ----End Issue 02 (2013-11-15)
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8 Engineering Guidelines
Verification NOTE
If the verification achieves the following results as expected, the configuration succeeds. Otherwise, the configuration fails.
l
3G-to-2G Load Balancing NOTE
The verification can be done when only the UMTS cell is in the basic congestion state.
The verification procedure consists of the RRC setup phase and the RAB connection phase. The verification in the latter phase involves CS speech services and PS data services. Step 1 Verifying that CS speech services in UMTS cell 1 are handed over to GSM cell 2 at the RRC setup phase Use a dual-mode MS to call a fixed telephone in cell 1. The call is successfully established. Initiate Uu-interface signaling tracing on the LMT. The RRC_RRC_CONNECT_REQ and RRC_RRC_CONN_REJECT messages are reported, and the RRC_RRC_CONN_REJECT message contains GSM-TargetCellInfo. That is, information about cell2 is contained, indicating that the MS accesses cell2. Step 2 Verifying that PS data services in UMTS cell1 are handed over to GPRS cell3 at the RAB connection phase 1.
Use an MS to browse the Internet.
2.
Initiate Uu-interface message tracing on the LMT. You can find that the messages RRC_RB_SETUP, RRC_RB_SETUP_CMP, RRC_MEAS_CTRL, and RRC_CELL_CHANGE_ORDER_FROM_UTRAN are reported, and that the value of InterRATEvent in the RRC_MEAS_CTRL message is event3c.
3.
Initiate Iu-interface signaling tracing on the LMT. You can find that the RANAP_SRNS_CONTEXT_REQ message is sent from the CN to the RNC and then the RANAP_SRNS_CONTEXT_RESP message is sent from the RNC to the CN.
4.
Initiate Iu-interface signaling tracing on the LMT. You can find that the RANAP_SRNS_DATA_FORWARD_COMMAND and RANAP_IU_RELEASE_COMMAND messages are sent from the CN to the RNC and then the RANAP_IU_RELEASE_COMPLETE message is sent from the RNC to the CN.
5.
When the MS attempts to reselect cell3, Internet browsing is slightly affected. After the MS reselects cell3, Internet browsing returns to normal.
Step 3 Verifying that CS speech services in UMTS cell1 are handed over to GSM cell2 at the RAB connection phase. 1.
Use the dual-mode MS to call a fixed telephone in cell1. The call is successfully established.
2.
Initiate Uu-interface tracing on the LMT. You can find that the messages RRC_RB_SETUP, RRC_RB_SETUP_CMP, RRC_MEAS_CTRL, and RRC_HO_FROM_UTRAN_CMD_GSM are reported, and that the value of InterRATEvent in the RRC_MEAS_CTRL message is event3c.
3.
Initiate Iu-interface signaling tracing on the LMT. You can find that the RANAP_RELOCATION_REQUIRED message is sent from the RNC to the CN and then the RANAP_RELOCATION_COMMAND and RANAP_IU_RELEASE_COMMAND messages are sent from the CN to the RNC.
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SingleRAN Common Radio Resource Management Feature Parameter Description
4.
8 Engineering Guidelines
Initiate Iu-interface signaling tracing on the LMT. You can find that the RANAP_IU_RELEASE_COMPLETE message is sent from the RNC to the CN.
----End l
2G-to-3G Load Balancing NOTE
The verification can be done when only the GSM cell is in the basic congestion state.
Use an MS to initiate a call in the GSM cell. The directed retry procedure is triggered so that the MS accesses the neighboring UMTS cell. The call is successfully established. Initiate A-interface signaling tracing on the LMT. You can find that the Assignment Request, Handover Required, and Handover Command messages are reported and that the value of cause in the Handover Required message is directed-retry(13).
Deactivation l
Configuration on the RNC side Run the RNC MML command SET UMBSCCRRM to deactivate MBSC load balancing. In this step, set Service Distribution and Load Balancing Switch to OFF(OFF).
l
Configuration on the BSC side Run the BSC MML command SET GCELLHOINTERRATLDB to deactivate 2G-to-3G load balancing. In this step, set Allow Inter-RAT Load HO in Access State to OFF (OFF).
MML Command Examples //Activating Load Balancing Based on Iur-g //Configuration on the RNC side /Enabling load balancing and setting load difference thresholds/ SET UMBSCCRRM: MbscServiceDiffLdbSwitch=LOAD-BASED, Mbsc3G2GLdBlcCsDeltaThrd=10, Mbsc3G2GLdBlcPsDeltaThrd=30, Mbsc2GLoadAdjustCoeff=10; /Enabling inter-RAT handover/ SET UCORRMALGOSWITCH: HoSwitch=HO_INTER_RAT_CS_OUT_SWITCH-1&HO_INTER_RAT_PS_OUT_SWITCH-1; //Configuration on the BSC side /Enabling load balancing/ SET GCELLHOINTERRATLDB: IDTYPE=BYID, CELLID=0, OutSysLoadHoEn=YES, InterRatServiceLoadHoSwitch=Load-based, G2GLoadAdjustCoeff=10; /Enabling inter-RAT handover/ SET GCELLHOBASIC: IDTYPE=BYNAME, CELLNAME="0", INTERRATOUTBSCHOEN=YES, INTERRATINBSCHOEN=YES; /Setting load difference thresholds/ SET OTHSOFTPARA: G2G3GLdBlcDeltaThrd=110; //Deactivating Load Balancing Based on Iur-g //Configuration on the RNC side SET UMBSCCRRM: MbscServiceDiffLdbSwitch=OFF; //Configuration on the BSC side SET GCELLHOINTERRATLDB: IDTYPE=BYID, CELLID=0, InterRatServiceLoadHoSwitch=OFF;
8.5 Deployment of NACC Procedure Optimization This section describes how to activate, verify, and deactivate the optional feature MRFD-211401 NACC Procedure Optimization and the feature WRFD-070005 NACC Procedure Optimization Based on Iur-g between GSM and UMTS. Issue 02 (2013-11-15)
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SingleRAN Common Radio Resource Management Feature Parameter Description
8 Engineering Guidelines
Requirements l
Hardware – The BSC is the MBSC. – A GSM+UMTS dual-mode MS is required. – The interface board that supports IP transmission is configured.
l
Other Features – Configurations of other features on which this feature depends are complete. – MRFD-211401 NACC Procedure Optimization depends on features WRFD-020303 Inter-RAT Handover Based on Coverage, WRFD-020305 Inter-RAT Handover Based on Service, WRFD-020306 Inter-RAT Handover Based on Load, or WRFD-021200 HCS (Hierarchical Cell Structure). – WRFD-070005 NACC Procedure Optimization Based on Iur-g between GSM and UMTS depends on features WRFD-020303 Inter-RAT Handover Based on Coverage, WRFD-020305 Inter-RAT Handover Based on Service, WRFD-020306 Inter-RAT Handover Based on Load, GBFD-511102 NACC Procedure Optimization Based on Iurg between GSM and WCDMA, or WRFD-021200 HCS (Hierarchical Cell Structure).
l
License The license "NACC Procedure Optimization" on the BSC side has been activated. For details about the license items and how to activate the license, see License Management Feature Parameter Description.
l
Others – IP transmission mode is used on the Iur-g interface. – The MS supports NACC. – Both the 2G network and the 3G network are deployed. – A GSM cell and a UMTS cell are configured, and the GSM cell is configured as a neighboring cell of the UMTS cell. – Data is negotiated and planned for the inter-MBSC Iur-g interface.
Activation l
Configuration on the RNC side
Step 1 Run the RNC MML command SET UCORRMALGOSWITCH to enable the NACC function. In this step, select HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH in the HandOver switch drop-down list box. Step 2 Run the RNC MML command SET UMBSCCRRM to enable direct GERAN system information exchange. In this step, set GERAN System Information Exchange Switch to ON. Step 3 Run the RNC MML command SET UCORRMALGOSWITCH to enable the inter-RAT handover. In this step, select HO_INTER_RAT_CS_OUT_SWITCH and HO_INTER_RAT_PS_OUT_SWITCH in the HandOver switch drop-down list box. Step 4 Run the RNC MML command MOD UEXT2GCELL to enable the inter-RAT cell to support indication of the RIM procedure. In this step, set Inter-RAT cell support RIM indicator to Issue 02 (2013-11-15)
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SingleRAN Common Radio Resource Management Feature Parameter Description
8 Engineering Guidelines
TRUE. If multiple neighboring cells are planned, repeat this step to enable the inter-RAT cell to support indication of the RIM for all the neighboring cells. ----End l
Configuration on the BSC side For the configuration on the BSC side you can refer to GBFD-511102 Configuring NACC (Network Assisted Cell Change) Procedure Optimization Based on Iur-g between GSM and WCDMA.
Verification Step 1 Trace Iur-g and Um interfaces on the LMT. Step 2 Use a dual-mode MS to download data in the UMTS cell and then switch the MS to the GSM cell. Step 3 Check that INFO_EXCHG_INIT_REQ and INFO_EXCHG_INIT_RSP messages are reported on the Iur-g interface. The value of informationTypeItem in the INFO_EXCHG_INIT_REQ message is nACC-Related-Data(8) and the INFO_EXCHG_INIT_RSP message contains nACC-Related-Data. ----End
Deactivation Run the RNC MML command SET UCORRMALGOSWITCH on the RNC to deactivate NACC Procedure Optimization. In this step, deselect HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH in the HandOver switch drop-down list box.
MML Command Examples //Activating NACC Procedure Optimization //Configuration on the RNC side /Enabling the NACC function/ SET UCORRMALGOSWITCH: HoSwitch=HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH-1; /Enabling direct GERAN system information exchange*/ SET UMBSCCRRM: MbscReqGeranInfoSwitch=ON; /Enabling the inter-RAT handover/ SET UCORRMALGOSWITCH: HoSwitch=HO_INTER_RAT_CS_OUT_SWITCH-1&HO_INTER_RAT_PS_OUT_SWITCH-1; /Enabling the inter-RAT cell to support indication of the RIM procedure/ MOD UEXT2GCELL: GSMCellIndex=0, SuppRIMFlag=TRUE; //Configuration on the BSC side /Allowing NACC-related information exchange on the Iur-g interface/ MOD GNRNC: RNCINDEX=0, SPTINFOEXCHG=YES, INFOEXCHGLIST=NACCRELATED-1; /Setting basic GPRS attributes of the GSM cell/ SET GCELLGPRS: IDTYPE=BYID, CELLID=0, GPRS=SupportAsInnPcu, NACCSPT=YES; //Deactivating NACC Procedure Optimization //Configuration on the RNC side SET UCORRMALGOSWITCH: HoSwitch=HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH-0;
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
9
Parameters
Table 9-1 Parameter description Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
MbscNcovHoO n2GldInd
BSC6900
SET UMBSCCRRM
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
Meaning:If the switch is ON, the load state of target 2G cell will be considered during Noncovered InterRat handover procedure. If the switch is OFF, the load state of target 2G cell will not be considered. GUI Value Range:OFF (OFF), ON(ON) Unit:None Actual Value Range:OFF, ON Default Value:OFF (OFF)
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
MbscNcovHoO n2GldInd
BSC6910
SET UMBSCCRRM
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
Meaning:If the switch is ON, the load state of target 2G cell will be considered during Noncovered InterRat handover procedure. If the switch is OFF, the load state of target 2G cell will not be considered. GUI Value Range:OFF (OFF), ON(ON) Unit:None Actual Value Range:OFF, ON Default Value:OFF (OFF)
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
LoadHoOn3G2 GldInd
BSC6900
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:If the switch is ON, the load difference between 3G cell and target 2G cell will be considered during the loadbase handover. If the switch is OFF, the load difference between 3G cell and 2G cell will not be considered.
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:OFF (OFF), ON(ON) Unit:None Actual Value Range:OFF, ON Default Value:OFF (OFF)
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
LoadHoOn3G2 GldInd
BSC6910
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:If the switch is ON, the load difference between 3G cell and target 2G cell will be considered during the loadbase handover. If the switch is OFF, the load difference between 3G cell and 2G cell will not be considered.
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:OFF (OFF), ON(ON) Unit:None Actual Value Range:OFF, ON Default Value:OFF (OFF)
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
CSHOOut2Gloa dThd
BSC6900
ADD UCELLINTER RATHONCOV
WRFD-070004 WRFD-020310
Inter-RAT Handover Based on Service
MOD UCELLINTER RATHONCOV
WRFD-020306
Meaning:Thresh old for 2G load for outgoing inter-RAT CS handovers. If the GSM load policy is used, that is, "NcovHoOn2Gl dInd" in the "SET UINTERRATH ONCOV" command is set to ON, a noncoverage-based handover from the 3G cell to the 2G cell is stopped if the uplink or downlink normalized load carried in the relocation response message from the 2G network exceeds the value of this parameter.
WRFD-020305
Inter-RAT Handover Based on Load
GUI Value Range:0~100 Unit:% Actual Value Range:0~100 Default Value: 80
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
CSHOOut2Gloa dThd
BSC6910
ADD UCELLINTER RATHONCOV
WRFD-070004 WRFD-020310
Inter-RAT Handover Based on Service
MOD UCELLINTER RATHONCOV
WRFD-020306
Meaning:Thresh old for 2G load for outgoing inter-RAT CS handovers. If the GSM load policy is used, that is, "NcovHoOn2Gl dInd" in the "SET UINTERRATH ONCOV" command is set to ON, a noncoverage-based handover from the 3G cell to the 2G cell is stopped if the uplink or downlink normalized load carried in the relocation response message from the 2G network exceeds the value of this parameter.
WRFD-020305
Inter-RAT Handover Based on Load
GUI Value Range:0~100 Unit:% Actual Value Range:0~100 Default Value: 80
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
Mbsc3G2GLdB lcCsDeltaThrd
BSC6900
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:This parameter defines the load difference threshold between 3G cell and 2G cell when CS service is distributed to 2G. If the load difference between 3G cell and target 2G cell exceeds this parameter value, then the loadbased balance of CS service may be performed.
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:-100~10 0 Unit:None Actual Value Range:-100~10 0 Default Value: 10
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
Mbsc3G2GLdB lcCsDeltaThrd
BSC6910
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:This parameter defines the load difference threshold between 3G cell and 2G cell when CS service is distributed to 2G. If the load difference between 3G cell and target 2G cell exceeds this parameter value, then the loadbased balance of CS service may be performed.
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:-100~10 0 Unit:None Actual Value Range:-100~10 0 Default Value: 10
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
PSHOOut2Gloa dThd
BSC6900
ADD UCELLINTER RATHONCOV
WRFD-070004 WRFD-020310
Inter-RAT Handover Based on Service
MOD UCELLINTER RATHONCOV
WRFD-020306
Meaning:Thresh old for 2G load for outgoing inter-RAT PS handovers. This parameter specifies the threshold for 2G load for outgoing interRAT PS handovers. If the GSM load policy is used, that is, "NcovHoOn2Gl dInd" in the "SET UINTERRATH ONCOV" command is set to ON, a noncoverage-based handover from the 3G cell to the 2G cell is stopped if the uplink or downlink normalized load carried in the relocation response message from the 2G network exceeds the value of this parameter.
WRFD-020305
Inter-RAT Handover Based on Load
GUI Value Range:0~100 Unit:% Actual Value Range:0~100 Default Value: 60
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
PSHOOut2Gloa dThd
BSC6910
ADD UCELLINTER RATHONCOV
WRFD-070004 WRFD-020310
Inter-RAT Handover Based on Service
MOD UCELLINTER RATHONCOV
WRFD-020306
Meaning:Thresh old for 2G load for outgoing inter-RAT PS handovers. This parameter specifies the threshold for 2G load for outgoing interRAT PS handovers. If the GSM load policy is used, that is, "NcovHoOn2Gl dInd" in the "SET UINTERRATH ONCOV" command is set to ON, a noncoverage-based handover from the 3G cell to the 2G cell is stopped if the uplink or downlink normalized load carried in the relocation response message from the 2G network exceeds the value of this parameter.
WRFD-020305
Inter-RAT Handover Based on Load
GUI Value Range:0~100 Unit:% Actual Value Range:0~100 Default Value: 60
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
Mbsc3G2GLdB lcPsDeltaThrd
BSC6900
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:This parameter defines the load difference threshold between 3G cell and 2G cell when PS service is distributed to 2G. If the load difference between 3G cell and target 2G cell exceeds this parameter value, then the loadbased balance of PS service may be performed.
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:-100~10 0 Unit:None Actual Value Range:-100~10 0 Default Value: 30
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
Mbsc3G2GLdB lcPsDeltaThrd
BSC6910
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:This parameter defines the load difference threshold between 3G cell and 2G cell when PS service is distributed to 2G. If the load difference between 3G cell and target 2G cell exceeds this parameter value, then the loadbased balance of PS service may be performed.
WRFD-070004
Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:-100~10 0 Unit:None Actual Value Range:-100~10 0 Default Value: 30
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
MbscServiceDiffLdbSwitch
BSC6900
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:This parameter defines the switch of service distribution and load balancing algorithm. If SERVICEBASED is selected, only load state of 2G target cell will be considered. If LOAD-BASED is selected, the difference between the load in the source cell and load in the target 2G cell will be considered in addition. If DYNAMICBASED is selected, it will be automatically adjusted to SERVICEBASED or LOAD-BASED according to the load status of current cell.
WRFD-070007 WRFD-070004
GSM and UMTS Traffic Steering Based on Iur-g Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:OFF (OFF), SERVICEBASED (SERVICEBASED), LOAD-BASED (LOADBASED), DYNAMICBASED
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SingleRAN Common Radio Resource Management Feature Parameter Description
Parameter ID
NE
MML Command
9 Parameters
Feature ID
Feature Name
Description (DYNAMICBASED) Unit:None Actual Value Range:OFF, SERVICEBASED, LOADBASED, DYNAMICBASED Default Value:OFF (OFF)
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
MbscServiceDiffLdbSwitch
BSC6910
SET UMBSCCRRM
WRFD-070006
GSM and UMTS Load Balancing Based on Iur-g
Meaning:This parameter defines the switch of service distribution and load balancing algorithm. If SERVICEBASED is selected, only load state of 2G target cell will be considered. If LOAD-BASED is selected, the difference between the load in the source cell and load in the target 2G cell will be considered in addition. If DYNAMICBASED is selected, it will be automatically adjusted to SERVICEBASED or LOAD-BASED according to the load status of current cell.
WRFD-070007 WRFD-070004
GSM and UMTS Traffic Steering Based on Iur-g Load Based GSM and UMTS Handover Enhancement Based on Iur-g
GUI Value Range:OFF (OFF), SERVICEBASED (SERVICEBASED), LOAD-BASED (LOADBASED), DYNAMICBASED
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SingleRAN Common Radio Resource Management Feature Parameter Description
Parameter ID
NE
MML Command
9 Parameters
Feature ID
Feature Name
Description (DYNAMICBASED) Unit:None Actual Value Range:OFF, SERVICEBASED, LOADBASED, DYNAMICBASED Default Value:OFF (OFF)
SRN
BSC6900
ADD BRD
MRFD-210301
INH BRD
Configuration Management
Meaning:Numb er of the subrack GUI Value Range:0~11
MOD BRD RMV BRD
Unit:None
SET MPUBIND
Actual Value Range:0~11
UIN BRD
Default Value:None SRN
BSC6910
ADD BRD
MRFD-210301
INH BRD
Configuration Management
Meaning:Numb er of the subrack GUI Value Range:0~11
MOD BRD RMV BRD
Unit:None
UIN BRD
Actual Value Range:0~11 Default Value:None
SN
BSC6900
ADD BRD INH BRD
MRFD-210301
Configuration Management
MOD BRD RMV BRD SET MPUBIND UIN BRD
Meaning:Numb er of the slot GUI Value Range:0~27 Unit:None Actual Value Range:0~27 Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
SN
BSC6910
ADD BRD
MRFD-210301
Configuration Management
Meaning:Numb er of the slot
INH BRD
GUI Value Range:0~27
MOD BRD RMV BRD
Unit:None
UIN BRD
Actual Value Range:0~27 Default Value:None
RED
BSC6900
ADD BRD MOD BRD
MRFD-210301
Configuration Management
Meaning:Worki ng mode of a board. If this parameter is set to YES, the board works in active/standby mode. If this parameter is set to NO, the board works in independent mode. GUI Value Range:YES (YES), NO(NO) Unit:None Actual Value Range:YES, NO Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
RED
BSC6910
ADD BRD
MRFD-210301
Configuration Management
Meaning:Worki ng mode of a board. If this parameter is set to YES, the board works in active/standby mode. If this parameter is set to NO, the board works in independent mode. GUI Value Range:YES (YES), NO(NO) Unit:None Actual Value Range:YES, NO Default Value:None
MPUSUBRAC K
BSC6900
ADD BRD SET MPUBIND
MRFD-210301
Configuration Management
Meaning:Numb er of the subrack where the MPU subsystem is located GUI Value Range:0~11 Unit:None Actual Value Range:0~11 Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
MPUSLOT
BSC6900
ADD BRD
MRFD-210301
Configuration Management
Meaning:Numb er of the slot where the MPU subsystem is located
SET MPUBIND
GUI Value Range:0~27 Unit:None Actual Value Range:0~27 Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
BRDTYPE
BSC6900
ADD BRD
MRFD-210301
Configuration Management
Meaning:Type of the board
MOD BRD
GUI Value Range:AEUa, AOUa, AOUc, DPUb, DPUe, DPUh, FG2a, FG2c, GOUa, GOUc, GOUe, NIUa, NIUc, OMUa, OMUb, OMUc, PEUa, PEUc, POUa, POUc, SAUa, SAUc, SPUa, SPUb, SPUc, UOIa, UOIc, SCUb, SCUa, GCUa, GCGa, GCUb, GCGb Unit:None Actual Value Range:AEUa, AOUa, AOUc, DPUb, DPUe, FG2a, FG2c, GOUa, GOUc, GOUe, NIUa, OMUa, OMUb, OMUc, PEUa, PEUc, POUa, POUc, SAUa, SAUc, SPUa, SPUb, SPUc, UOIa, UOIc Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
BRDTYPE
BSC6910
ADD BRD
MRFD-210301
Configuration Management
Meaning:Type of the board
MOD BRD
GUI Value Range:AOUc, EGPUa, ENIUa, EOMUa, ESAUa, EXOUa, FG2c, GOUc, GOUe, UOIc, SCUb, GCUa, GCGa, GCUb, GCGb Unit:None Actual Value Range:AOUc, EGPUa, ENIUa, EOMUa, ESAUa, EXOUa, FG2c, GOUc, GOUe, UOIc Default Value:None PN
BSC6900
ADD ETHIP
WRFD-140208
MOD ETHIP
WRFD-050409
RMV ETHIP
WRFD-050402 WRFD-050410 WRFD-140207
Iub Transmission Resource Pool in RNC IP Transmission Introduction on Iu Interface IP Transmission Introduction on Iub Interface IP Transmission Introduction on Iur Interface Iu/Iur Transmission Resource Pool in RNC
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Meaning:Specifies Ethernet port number. GUI Value Range:0~11 Unit:None Actual Value Range:0~7 (FG2a), 0~1 (GOUa), 0~11 (FG2c), 0~3 (GOUc/GOUe) Default Value:None
61
SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
PN
BSC6910
ADD ETHIP
None
None
Meaning:Specifies Ethernet port number.
MOD ETHIP RMV ETHIP
GUI Value Range:0~11 Unit:None Actual Value Range:0~1 (EXOUa), 0~11 (FG2c), 0~3 (GOUc/GOUe) Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
IPADDR
BSC6900
ADD ETHIP
WRFD-140208
MOD ETHIP
WRFD-050409
Iub Transmission Resource Pool in RNC
Meaning:Local IP address of the Ethernet port. The IP address is an address of Class A, B or C, which is determined by the customer according to the actual network planning. An IP address consists of the network prefix and the host number. The host number cannot be all 0 or all 1. The first byte of the IP address cannot be 0 or 127. During the IP address planning, the IP addresses of Ethernet ports cannot be in the same network segment with any IP address configured in the system. Also it cannot be in the same network segment with internal IP addresses of the OMU.
WRFD-050402 WRFD-050410 WRFD-140207
IP Transmission Introduction on Iu Interface IP Transmission Introduction on Iub Interface IP Transmission Introduction on Iur Interface Iu/Iur Transmission Resource Pool in RNC
GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address
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SingleRAN Common Radio Resource Management Feature Parameter Description
Parameter ID
NE
MML Command
9 Parameters
Feature ID
Feature Name
Description Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
IPADDR
BSC6910
ADD ETHIP
None
None
Meaning:Local IP address of the Ethernet port. The IP address is an address of Class A, B or C, which is determined by the customer according to the actual network planning. An IP address consists of the network prefix and the host number. The host number cannot be all 0 or all 1. The first byte of the IP address cannot be 0 or 127. During the IP address planning, the IP addresses of Ethernet ports cannot be in the same network segment with any IP address configured in the system. Also it cannot be in the same network segment with internal IP addresses of the OMU.
MOD ETHIP
GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address
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SingleRAN Common Radio Resource Management Feature Parameter Description
Parameter ID
NE
MML Command
9 Parameters
Feature ID
Feature Name
Description Default Value:None
MASK
BSC6900
ADD ETHIP
WRFD-140208
MOD ETHIP
WRFD-050409 WRFD-050402 WRFD-050410 WRFD-140207
Iub Transmission Resource Pool in RNC IP Transmission Introduction on Iu Interface
Meaning:Subnet mask of the board. GUI Value Range:Valid IP Address Unit:None
IP Transmission Introduction on Iub Interface
Actual Value Range:Valid IP Address
IP Transmission Introduction on Iur Interface
Default Value:None
Iu/Iur Transmission Resource Pool in RNC MASK
BSC6910
ADD ETHIP
None
None
MOD ETHIP
Meaning:Subnet mask of the board. GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address Default Value:None
DSTIP
BSC6900
ADD IPRT
WRFD-050409
MOD IPRT
WRFD-050402
RMV IPRT
WRFD-050410
IP Transmission Introduction on Iu Interface IP Transmission Introduction on Iub Interface IP Transmission Introduction on Iur Interface
Meaning:Destin ation IP address. GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
DSTIP
BSC6910
ADD IPRT
WRFD-150244
MOD IPRT
WRFD-150243
Iu/Iur IP Transmission Based on Dynamic Load Balance
Meaning:Destin ation IP address.
Iub IP Transmission Based on Dynamic Load Balance
Unit:None
RMV IPRT
GUI Value Range:Valid IP Address Actual Value Range:Valid IP Address Default Value:None
DSTMASK
BSC6900
ADD IPRT
WRFD-050409
MOD IPRT
WRFD-050402
RMV IPRT
WRFD-050410
IP Transmission Introduction on Iu Interface IP Transmission Introduction on Iub Interface IP Transmission Introduction on Iur Interface
Meaning:Subnet mask GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address Default Value:None
DSTMASK
BSC6910
ADD IPRT
None
None
MOD IPRT RMV IPRT
Meaning:Subnet mask GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
NEXTHOP
BSC6900
ADD IPRT
WRFD-050402
MOD IPRT
WRFD-050410
RMV IPRT
WRFD-050409
IP Transmission Introduction on Iub Interface
Meaning:IP address of the next hop.
IP Transmission Introduction on Iur Interface
GUI Value Range:Valid IP Address
IP Transmission Introduction on Iu Interface
Unit:None
WRFD-050107 WRFD-140207 WRFD-140208
IP routing Based Hub Node B Iu/Iur Transmission Resource Pool in RNC
Actual Value Range:Valid IP Address Default Value:None
Iub Transmission Resource Pool in RNC NEXTHOP
BSC6910
ADD IPRT
WRFD-150244
MOD IPRT
WRFD-050107
RMV IPRT
WRFD-150243
Iu/Iur IP Transmission Based on Dynamic Load Balance IP routing Based Hub Node B
SPX
BSC6900
ADD M3LE
WRFD-010101 WRFD-050409 WRFD-050410 WRFD-050301
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Meaning:IP address of the next hop. GUI Value Range:Valid IP Address Unit:None
Iub IP Transmission Based on Dynamic Load Balance
Actual Value Range:Valid IP Address
3GPP R9 Specifications
Meaning:Uniqu ely identifies an OSP.
IP Transmission Introduction on Iu Interface
Default Value:None
GUI Value Range:0~4
IP Transmission Introduction on Iur Interface
Unit:None
ATM Transmission Introduction Package
Default Value:None
Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
Actual Value Range:0~4
68
SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
SPX
BSC6910
ADD M3LE
WRFD-010101
3GPP R9 Specifications
Meaning:Uniqu ely identifies an OSP.
WRFD-150244 WRFD-050301
Iu/Iur IP Transmission Based on Dynamic Load Balance ATM Transmission Introduction Package
SIGLNKID
BSC6900
ACT M3LNK
WRFD-050409
ADD M3LNK
WRFD-050410
DEA M3LNK
IP Transmission Introduction on Iu Interface IP Transmission Introduction on Iur Interface
INH M3LNK MOD M3LNK
GUI Value Range:0~7 Unit:None Actual Value Range:0~7 Default Value:None Meaning:ID of an M3UA link in the specified link set. GUI Value Range:0~15
RMV M3LNK
Unit:None
UIN M3LNK
Actual Value Range:0~15 Default Value:None
SIGLNKID
BSC6910
ACT M3LNK ADD M3LNK DEA M3LNK INH M3LNK
WRFD-150244
Iu/Iur IP Transmission Based on Dynamic Load Balance
Meaning:ID of an M3UA link in the specified link set.
MOD M3LNK
GUI Value Range:0~15
RMV M3LNK
Unit:None
UIN M3LNK
Actual Value Range:0~15 Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
PEERIP1
BSC6900
ADD SCTPLNK
WRFD-050409
MOD SCTPLNK
WRFD-050410
IP Transmission Introduction on Iu Interface
Meaning:First destination IP address. The invalid value is 0.
WRFD-050402 WRFD-050404
IP Transmission Introduction on Iub Interface IP Transmission Introduction on Iur Interface ATM/IP Dual Stack Node B
GUI Value Range:Valid IP Address Unit:None Actual Value Range:Valid IP Address Default Value:None
PEERIP1
BSC6910
ADD SCTPLNK
WRFD-150244
MOD SCTPLNK
WRFD-150243
WRFD-050404
Iu/Iur IP Transmission Based on Dynamic Load Balance
Meaning:First destination IP address. The invalid value is 0.
ATM/IP Dual Stack Node B
GUI Value Range:Valid IP Address
Iub IP Transmission Based on Dynamic Load Balance
Unit:None Actual Value Range:Valid IP Address Default Value:None
PEERPN
BSC6900
ADD SCTPLNK
WRFD-050409
MOD SCTPLNK
WRFD-050410
WRFD-050402 WRFD-050404
IP Transmission Introduction on Iu Interface
Meaning:Destin ation SCTP port number.
IP Transmission Introduction on Iub Interface
GUI Value Range: 1024~65535
IP Transmission Introduction on Iur Interface
Unit:None
ATM/IP Dual Stack Node B
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Actual Value Range: 1024~65535 Default Value:None
70
SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
PEERPN
BSC6910
ADD SCTPLNK
WRFD-150244
MOD SCTPLNK
WRFD-150243
Iu/Iur IP Transmission Based on Dynamic Load Balance
Meaning:Destin ation SCTP port number.
WRFD-050404
ATM/IP Dual Stack Node B
DPC
BSC6900
ADD N7DPC
WRFD-010101
MOD N7DPC
WRFD-050409 WRFD-050410 WRFD-050301
GUI Value Range: 1024~65535 Unit:None
Iub IP Transmission Based on Dynamic Load Balance
Actual Value Range: 1024~65535
3GPP R9 Specifications
Meaning:As an integer, the DSP code can be expressed by a decimal digit or a hexadecimal digit. If the DSP code is expressed by a hexadecimal digit, H' or h' is added before the number,eg.H'F1 .
IP Transmission Introduction on Iu Interface IP Transmission Introduction on Iur Interface ATM Transmission Introduction Package
Default Value:None
GUI Value Range: 1~16777215 Unit:None Actual Value Range:1~16383 (BIT14), 1~65535 (BIT16), 1~16777215 (BIT24) Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
9 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
DPC
BSC6910
ADD N7DPC
WRFD-010101
MOD N7DPC
WRFD-150244
3GPP R9 Specifications
Meaning:As an integer, the DSP code can be expressed by a decimal digit or a hexadecimal digit. If the DSP code is expressed by a hexadecimal digit, H' or h' is added before the number,eg.H'F1 .
WRFD-050301
Iu/Iur IP Transmission Based on Dynamic Load Balance ATM Transmission Introduction Package
GUI Value Range: 1~16777215 Unit:None Actual Value Range:1~16383 (BIT14), 1~65535 (BIT16), 1~16777215 (BIT24) Default Value:None
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SingleRAN Common Radio Resource Management Feature Parameter Description
10 Counters
10
Counters
Table 10-1 Counter description Counter ID
Counter Name
Counter Description
NE
Feature ID
Feature Name
73425956
VS.IRATHO.At tENACC
Number of Attempts to Obtain GSM System Information During Iur-gbased ENACCs Triggered by Inter-RAT PS Handovers for Cell
BSC6900
WRFD-070005
NACC Procedure Optimization Based on Iur-g
73425957
VS.IRATHO.Su ccENACC
Number of Successful Times That GSM System Information is Obtained During Iur-gbased ENACCs Triggered by Inter-RAT PS Handovers for Cell
BSC6900
WRFD-070005
NACC Procedure Optimization Based on Iur-g
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SingleRAN Common Radio Resource Management Feature Parameter Description
10 Counters
Counter ID
Counter Name
Counter Description
NE
Feature ID
Feature Name
73425956
VS.IRATHO.At tENACC
Number of Attempts to Obtain GSM System Information During Iur-gbased ENACCs Triggered by Inter-RAT PS Handovers for Cell
BSC6910
WRFD-070005
NACC Procedure Optimization Based on Iur-g
73425957
VS.IRATHO.Su ccENACC
Number of Successful Times That GSM System Information is Obtained During Iur-gbased ENACCs Triggered by Inter-RAT PS Handovers for Cell
BSC6910
WRFD-070005
NACC Procedure Optimization Based on Iur-g
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SingleRAN Common Radio Resource Management Feature Parameter Description
11 Glossary
11
Glossary
For the acronyms, abbreviations, terms, and definitions, see Glossary.
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SingleRAN Common Radio Resource Management Feature Parameter Description
12
12 Reference Documents
Reference Documents
1.
Handover Feature Parameter Description
2.
Interoperability Between GSM and WCDMA Feature Parameter Description of the GBSS
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