GSM BSS GBSS15.0
11-Bit EGPRS Access Feature Parameter Description Issue
01
Date
2013-05-06
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2013. 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 mentioned in this document are the property of of their respective respective holders. holders.
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Website:
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Email:
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
Contents
Contents 1 About This Document..................................................................................................................1 1.1 Scope..............................................................................................................................................................................1 1.2 Intended Audience..........................................................................................................................................................1 1.3 Change History...............................................................................................................................................................1
2 Overview.........................................................................................................................................3 2.1 Introduction....................................................................................................................................................................3 2.2 Feature Su pport by NE...................................................................................................................................................3
3 Technical Description...................................................................................................................4 3.1 One-Phase Packet Access on the Uplink CCCH............................................................................................................5 3.2 One-Phase Packet Access on the Uplink PCCCH..........................................................................................................7
4 Related Features.............................................................................................................................8 5 Impact on the Network.................................................................................................................9 5.1 Impact on System Capacity............................................................................................................................................9 5.2 Impact on Network Performance....................................................................................................................................9
6 Engineering Guidelines.............................................................................................................10 6.1 When to Use 11-Bit EGPRS Access............................................................................................................................10 6.2 Network Planning.........................................................................................................................................................10 6.2.1 RF Planning...............................................................................................................................................................10 6.2.2 Network Topology.....................................................................................................................................................10 6.2.3 Hardwar e Planning....................................................................................................................................................10 6.3 Deploying 11-Bit EGPRS Access................................................................................................................................10 6.3.1 Deployment Requirements........................................................................................................................................10 6.3.2 Data Pre paration........................................................................................................................................................11 6.3.3 Feature Activation.....................................................................................................................................................12 6.3.4 Activation Observation..............................................................................................................................................14 6.3.5 Deactivation...............................................................................................................................................................14 6.4 Monitoring....................................................................................................................................................................16 6.5 Parameter Optimization................................................................................................................................................16 6.6 Troubleshooting............................................................................................................................................................16
7 Parameters.....................................................................................................................................17 8 Counters........................................................................................................................................20 Issue 01 (2013-05-06)
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
Contents
9 Glossary.........................................................................................................................................21 10 Reference Documents...............................................................................................................22
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
1 About This Document
1
About This Document
1.1 Scope This document describes the GBFD-119201 11-Bit EGPRS Access feature.
1.2 Intended Audience This document is intended for: l l
Personnel who need to understand the 11-Bit EGPRS Access feature Personnel who work with Huawei GPRS 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
l
Feature change: refers to a change in the 11-Bit EGPRS Access feature of a specific product version. Editorial change: refers to a change in wording or the addition of information that was not described in the earlier version.
Document Issues The document issue is as follows: l l
01 (2013-05-06) Draft A (2013-02-27)
01 (2013-05-06) This is the first commercial release of GBSS15.0. Compared with Draft A (2013-02-27), Issue 01 (2013-05-06) has no change. Issue 01 (2013-05-06)
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
1 About This Document
Draft A (2013-02-27) This is a draft. Compared with issue 01 (2012-04-28) of GBSS14.0, draft A (2013-02-27) of GBSS15.0 incorporates the changes described in the following table. Change Type
Change Description
Parameter Change
Feature change
Added descriptions about Added the AccTechReqSw enhancements in the 11-Bit ( GSM BSC6900 ,GSM EGPRS Access feature. For BSC6910 ) parameter. details, see section 3.1 OnePhase Packet Access on the Uplink CCCH.
Editorial change
Separated the GBFD-119201 None 11-Bit EGPRS Access feature from GPRS/EGPRS Connection Control and Transfer Feature Parameter Description and optimized
the descriptions.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
2 Overview
2
Overview
2.1 Introduction The Packet Channel Request message is an 8-bit or 11-bit access burst. The 11-Bit EGPRS Access feature enables the BSC to allocate channel resources to an MS upon receiving the access request so that the MS can have immediate access to services with only a short delay. In addition, this feature optimizes the procedure for 11-bit one-phase packet access on the uplink common control channel (CCCH) so that the BSC can obtain the capability of an MS to support the Extended Uplink TBF feature. If the MS supports the Extended Uplink TBF feature, the uplink data transfer uses established temporary block flows (TBFs). This eliminates the need to establish new TBFs and shortens the GPRS mobility management (GMM) access delay.
2.2 Feature Support by NE Table 2-1 Feature support by NE
Feature
BSC6900
BSC6910
GBTS
eGBTS
11-Bit EGPRS Access
NOTE
√ indicates that the NE supports this feature. × indicates that the NE does not support this feature.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
3 Technical Description
3
Technical Description
This chapter describes the establishment of an uplink TBF. Before transmitting data, an MS initiates a channel request. The packet switched (PS) channel request is of the following types: one-phase access and two-phase access. l
l
For a one-phase access request, the BSC allocates radio resources to an MS upon receiving the request. The radio resources can be the temporary flow identity (TFI) or uplink state flag (USF) resources. For a two-phase access request, the processing procedure is as follows:
1.
The BSC allocates one Radio Link Control (RLC)/Media Access Control (MAC) control block to an MS. The MS transmits a Packet Resource Request message on the allocated radio block. 2. The BSC allocates radio resources (such as the TFI or USF) to the MS. The MS then starts to transmit data on the allocated radio resources. The Packet Channel Request message is an 8-bit or 11-bit access burst, which carries only a small amount of information. The Packet Resource Request message, however, is an RLC/MAC signaling packet encoded using Coding Scheme 1 (CS-1), which carries more information, including the temporary logical link identifier (TLLI), MS multislot capability, and the radio priority. One-phase packet access can use the CCCH or the packet common control channel (PCCCH), depending on the channels configured for a cell. NOTE
The PCCCH is used only if the packet broadcast control channel (PBCCH) is configured for a cell. If no PBCCH is configured, the CCCH is used.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
3 Technical Description
3.1 One-Phase Packet Access on the Uplink CCCH This chapter describes the establishment of an uplink TBF. Before transmitting data, an MS initiates a channel request. The packet switched (PS) channel request is of the following types: one-phase access and two-phase access. l
l
For a one-phase access request, the BSC allocates radio resources to an MS upon receiving the request. The radio resources can be the temporary flow identity (TFI) or uplink state flag (USF) resources. For a two-phase access request, the processing procedure is as follows:
1.
The BSC allocates one Radio Link Control (RLC)/Media Access Control (MAC) control block to an MS. The MS transmits a Packet Resource Request message on the allocated radio block. 2. The BSC allocates radio resources (such as the TFI or USF) to the MS. The MS then starts to transmit data on the allocated radio resources. The Packet Channel Request message is an 8-bit or 11-bit access burst, which carries only a small amount of information. The Packet Resource Request message, however, is an RLC/MAC signaling packet encoded using Coding Scheme 1 (CS-1), which carries more information, including the temporary logical link identifier (TLLI), MS multislot capability, and the radio priority. One-phase packet access can use the CCCH or the packet common control channel (PCCCH), depending on the channels configured for a cell. NOTE
The PCCCH is used only if the packet broadcast control channel (PBCCH) is configured for a cell. If no PBCCH is configured, the CCCH is used.
One-Phase Packet Access on the Uplink CCCH Figure 3-1 shows the procedure for establishing an uplink TBF when one-phase packet access
uses the CCCH.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
3 Technical Description
Figure 3-1 One-phase packet access on the uplink CCCH
1. 2.
3.
4. 5.
6.
If no PCCCH is configured for a cell, an MS in packet idle mode sends a Channel Request message to the BSC over the random access channel (RACH). After receiving the Channel Request message from the MS, the BSC starts to establish a TBF and informs the MS whether the access request is allowed. If the request is allowed, the BSC sends an Immediate Assignment message to the MS over the access grant channel (AGCH). The message contains the USF and the TFI of the TBF and indicates that an uplink packet channel has been allocated for the uplink data transfer. If AccTechReqSw( GSM BSC6900 ,GSM BSC6910 ) is set to ON(On), the MS sends a Packet Resource Request message that carries its capability to support the Extended Uplink TBF feature to the BSC and the procedure proceeds to 4. If AccTechReqSw( GSM BSC6900 ,GSM BSC6910 ) is set to OFF(Off) , the procedure proceeds to 5. After receiving the Packet Resource Request message from the MS, the BSC responds with a Packet Uplink Assignment message to allocate channel resources to the MS. The MS sends the first uplink RLC data block, which contains the TLLI of the MS, to the BSC over the allocated uplink packet channel. After receiving the data block, the BSC responds with a Packet Uplink Ack/Nack message with the TLLI to complete the contention resolution procedure. The establishment of an uplink TBF is complete. The BSC responds with a Packet Uplink Ack/Nack message without the TLLI to acknowledge the reception of the uplink RLC data block.
EGPRS supports one-phase access and two-phase access. One-phase access and the first phase of two-phase access can be 8-bit or 11-bit access. The procedure for 11-bit one-phase access on Issue 01 (2013-05-06)
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
3 Technical Description
the CCCH is the same as that for 8-bit one-phase access on the CCCH. The access speeds are similar, but the MS multislot capability can be carried in the procedure for 11-bit one-phase access on the CCCH. Generally, an EGPRS-capable MS has the multislot capability. If an EGPRS-capable MS uses one-phase access, it informs the network of its multislot capability during 11-bit one-phase access. If an EGPRS-capable MS uses two-phase access, it sends a Packet Resource Request message to inform the network of its multislot capability. This prolongs access delay. Therefore, the EGPRS11BITCHANREQ( GSM BSC6900 ,GSM BSC6910 ) parameter should be set to YES(YES) to ensure that the EGPRS-capable MS uses one-phase access. This shortens the access duration by 300 ms, compared with two-phase access.
3.2 One-Phase Packet Access on the Uplink PCCCH The basic procedure for one-phase packet access on the uplink PCCCH is nearly the same as that for one-phase packet access on the uplink CCCH, except for the following differences: l l
l
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The channel request is initiated over the packet random access channel (PRACH). Uplink assignment rather than immediate assignment is initiated over the packet access grant channel (PAGCH). The procedure optimization controlled by AccTechReqSw( GSM BSC6900 ,GSM BSC6910 ) does not take effect for one-phase packet access on the uplink PCCCH.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
4 Related Features
4
Related Features
Table 4-1 Related features
Feature
Prerequisite Feature
11-Bit EGPRS Access
l
l
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Mutually Exclusive Feature
None GBFD-114201 EGPRS GBFD-119203 Extended Uplink TBF
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Affected Feature
None
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
5 Impact on the Network
5
Impact on the Network
5.1 Impact on System Capacity None
5.2 Impact on Network Performance Applying 11-bit one-phase access shortens the access delay for EGPRS-capable MSs. The optimization of the procedure for 11-bit one-phase packet access on the uplink enables the BSC to obtain the capability of an MS to support the Extended Uplink TBF feature in advance. This eliminates the need to establish new TBFs and shortens the GMM access delay. However, the optimization has the following negative impacts: l
l l
l
Prolongs the delay in activating the Packet Data Protocol (PDP) context and the first ping delay Prolongs the average duration of uplink TBFs Decreases the number of assignments on the uplink packet associated control channel (PACCH) Increases the call drop rate of uplink TBFs
Decreases the portion of uplink services using high-rate coding schemes
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
6 Engineering Guidelines
6
Engineering Guidelines
6.1 When to Use 11-Bit EGPRS Access It is recommended the 11-Bit EGPRS Access feature be enabled for cells that support EGPRS and have a large portion of EGPRS-capable MSs.
6.2 Network Planning 6.2.1 RF Planning N/A
6.2.2 Network Topology N/A
6.2.3 Hardware Planning N/A
6.3 Deploying 11-Bit EGPRS Access 6.3.1 Deployment Requirements Table 6-1 Deployment requirements
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Aspect
Requirement
Related features
See 4 Related Features
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
6 Engineering Guidelines
Aspect
Requirement
BSC
l
l
An external PCU is installed if an external PCU is required. The BSC is configured with PS service processing boards and Gb interface boards if a built-in PCU is required.
BTS
None
GSM networking
None
MS
MSs support 11-Bit EGPRS Access.
MSC
None
License
The license controlling this feature has been activated. For details on how to activate the license, see License Management Feature Parameter Description. For details about license items, see License Control Item Description.
Others
None
6.3.2 Data Preparation Table 6-2 Data preparation
Parameter Name
Parameter ID
Support 11BIT EGPRS11BIT EGPRS Access CHANREQ
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NE
Remarks (Configuratio n Principle for Different Scenarios)
BSC6900/ BSC6910
It is Network recommended planning this parameter be set to YES (YES) for cells that support EGPRS and have a large portion of EGPRS-capable MSs.
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Data Source
11
GSM BSS 11-Bit EGPRS Access Feature Parameter Description Parameter Name
Parameter ID
6 Engineering Guidelines NE
Remarks (Configuratio n Principle for Different Scenarios)
AccTechReqSw Access Technologies Request Switch
BSC6900/ BSC6910
It is Network recommended planning that this parameter be set to ON(On) during delay competition.
Inactive Period of Extended Uplink TBF
BSC6900/ BSC6910
It is Network recommended planning that this parameter be set to a value other than 0 when the enhanced 11-Bit EGPRS Access feature is enabled.
UPEXTTBFIN ACTDELAY
Data Source
6.3.3 Feature Activation Using the LMT NOTE
The BSC6900 supports both built-in PCUs and external PCUs. The BSC6910 supports only built-in PCUs.
Step 1 Activate the 11-Bit EGPRS access on the CCCH. l
l
1. 2.
When an external PCU is used, run the PCU ADD EGPRSPara command on the PCU operation maintenance center (OMC) to activate the 11-Bit EGPRS access on the CCCH. If a built-in PCU is used, perform the following steps on the BSC LMT: Run the SET GCELLPSBASE command with Support 11-Bit EGPRS Access set to YES (YES). Run the SET BSCPSSOFTPARA command with Force MS Two-phase Access set to Close(Close).
Step 2 (Optional) Enable the reporting of the radio access (RA) capability during one-phase access.
If a built-in PCU is used, perform the following steps on the BSC LMT: 1. 2.
Run the SET GCELLPSBASE command with Access Technologies Request Switch set to ON(On). Run the SET GCELLPRIVATEOPTPARA command with Inactive Period of Extended Uplink TBF set to a value greater than 0.
----End
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
6 Engineering Guidelines
MML Examples //Activating the 11-Bit EGPRS access on the CCCH SET GCELLPSBASE: IDTYPE=BYID, CELLID=0, EGPRS11BITCHANREQ=YES; //Disabling forced two-phase access SET BSCPSSOFTPARA: Force2Phase=Close; //(Optional) Enabling the reporting of the RA capability during one-phase access SET GCELLPSBASE: IDTYPE=BYID, CELLID=0, AccTechReqSw=ON; SET GCELLPRIVATEOPTPARA: IDTYPE=BYID, CELLID=0, UPEXTTBFINACTDELAY=2000;
Using the CME NOTE
When configuring the 11-Bit EGPRS Access feature on the CME, you must perform a single configuration first, and then perform batch modifications if required. You must perform a single configuration for a parameter before batch modifications of the parameter. You are advised to perform batch modifications before logging out of the parameter setting interface.
Step 1 Configure a single object on the CME. (CME single configuration)
Set parameters on the CME configuration interface according to the operation sequence described in Table 6-3. For the method of performing the CME single configuration, see CME Single Configuration Operation Guide. Step 2 Modify objects in batches on the CME. (CME batch modification center)
To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the icon on the CME configuration interface to start the batch modification wizard. For the method of performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End NOTE
Configure the following managed objects (MOs) when a built-in PCU is used. Table 6-3 Configuring parameters on the CME
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SN
MO
NE
Parameter Name
Parameter ID
Supports CME Batch Modificati on Center
1
GCELLPRI VATEOPTP ARA
BSC6900/ BSC6910
Inactive Period of Extended Uplink TBF
UPEXTTBF INACTDEL AY
Yes
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description SN
MO
6 Engineering Guidelines NE
GCELLPSB ASE
2
GCELLPSB ASE
BSC6900/ BSC6910
BSCPSSOF TPARA 3
GCELLPSB ASE
BSC6900/ BSC6910
Parameter Name
Parameter ID
Not Send Dummy Message with Extended Uplink TBF
EXTUTBF NODATA
Support 11BIT EGPRS Access
EGPRS11B ITCHANRE Q
Force MS Two-phase Access
Force2Phas e
Supports CME Batch Modificati on Center
Yes
AccTechReq Yes Access Technologie Sw s Request Switch
6.3.4 Activation Observation Step 1 Verify the 11-Bit EGPRS access on the CCCH.
Use an MS that supports 11-Bit EGPRS access to perform a PS service. Expected result: The random access information element (IE) in the channel request indicates that the request is an 11-bit access burst, and the access is successful. Step 2 (Optional) Verify the reporting of the RA capability during one-phase access.
Use an MS to initiate dial-up access and perform the attach service. Expected result: After Access Technologies Request Switch is set to ON(On), Gb-interface message tracing results indicate that the duration from the reception of an attach message to the reception of an attach complete message is shortened. ----End
6.3.5 Deactivation Using the LMT On the BSC LMT, perform the following steps: Step 1 Deactivate the 11-Bit EGPRS access on the CCCH.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
6 Engineering Guidelines
Run the SET GCELLPSBASE command with Support 11BIT EGPRS Access set to NO (NO). Step 2 (Optional) Disable the reporting of the RA capability during one-phase access
Run the SET GCELLPSBASE command with Access Technologies Request Switch set to OFF(Off) . ----End
MML Examples //Deactivating the 11-Bit EGPRS access on the CCCH SET GCELLPSBASE: IDTYPE=BYID, CELLID=0, EGPRS11BITCHANREQ=NO; //(Optional) Disabling the reporting of the RA capability during one-phase access //Using a built-in PCU SET GCELLPSBASE: IDTYPE=BYID, CELLID=0, AccTechReqSw=OFF;
Using the CME NOTE
When configuring the 11-Bit EGPRS Access feature on the CME, you must perform a single configuration first, and then perform batch modifications if required. You must perform a single configuration for a parameter before batch modifications of the parameter. You are advised to perform batch modifications before logging out of the parameter setting interface.
Step 1 Configure a single object on the CME. (CME single configuration)
Set parameters on the CME configuration interface according to the operation sequence described in Table 6-4. For the method of performing the CME single configuration, see CME Single Configuration Operation Guide. Step 2 Modify objects in batches on the CME. (CME batch modification center)
To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the icon on the CME configuration interface to start the batch modification wizard. For the method of performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End NOTE
Configure the following MOs when a built-in PCU is used.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
6 Engineering Guidelines
Table 6-4 Configuring parameters on the CME
SN
MO
NE
Parameter Name
Parameter ID
Supports CME Batch Modificati on Center
1
GCELLPRI VATEOPTP ARA
BSC6900/ BSC6910
Inactive Period of Extended Uplink TBF
UPEXTTBF INACTDEL AY
Yes
2
GCELLPSB ASE
BSC6900/ BSC6910
Support 11BIT EGPRS Access
EGPRS11B ITCHANRE Q
Yes
3
GCELLPSB ASE
BSC6900/ BSC6910
Access AccTechReq Yes Technologie Sw s Request Switch
6.4 Monitoring l
l
Monitor the changes in the number of TBF establishments during one-phase access and two-phase access. Monitor the changes in the first ping delay and the GMM/SM delay of EGPRS-capable MSs.
6.5 Parameter Optimization None
6.6 Troubleshooting None
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
7 Parameters
7
Parameters
Table 7-1 Parameter description
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
AccTechReqS w
BSC6900
SET GCELLPSBAS E
GBFD-119201
11-Bit EGPRS Access
Meaning:Wheth er to report the radio access (RA) capability of an MS during the 11-Bit EGPRS one phase access.If the MS supports the one-phase RA report function, the MS reports the RA capability based on the values of IEs in an immediate assignment message. GUI Value Range:OFF (Off), ON(On) Unit:None Actual Value Range:OFF, ON Default Value:OFF(Off)
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
7 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
AccTechReqS w
BSC6910
SET GCELLPSBAS E
GBFD-119201
11-Bit EGPRS Access
Meaning:Wheth er to report the radio access (RA) capability of an MS during the 11-Bit EGPRS one phase access.If the MS supports the one-phase RA report function, the MS reports the RA capability based on the values of IEs in an immediate assignment message. GUI Value Range:OFF (Off), ON(On) Unit:None Actual Value Range:OFF, ON Default Value:OFF(Off)
EGPRS11BIT CHANREQ
BSC6900
SET GCELLPSBAS E
GBFD-119201
11-Bit EGPRS Access
Meaning:Wheth er to support the 11-bit EGPRS access request GUI Value Range:NO (NO), YES (YES) Unit:None Actual Value Range:NO, YES Default Value:NO(NO)
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
7 Parameters
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
EGPRS11BIT CHANREQ
BSC6910
SET GCELLPSBAS E
GBFD-119201
11-Bit EGPRS Access
Meaning:Wheth er to support the 11-bit EGPRS access request GUI Value Range:NO (NO), YES (YES) Unit:None Actual Value Range:NO, YES Default Value:NO(NO)
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
8 Counters
8
Counters
Table 8-1 Counter description
Counter ID
Counter Name Counter Description
1278709421
BSC.ACC.RAC H.11BIT. 1PHASE.ACCE SS.REQ
Feature ID
Feature Name
ZA9405:Numbe BSC6910 r of 11-Bit One Phase Access Requests Received on RACH per BSC
GBFD-119201
11-Bit EGPRS Access
1279169421
RACH.11BIT. A9405:Number BSC6910 1PHASE.ACCE of 11-Bit One SS.REQ Phase Access Requests Received on RACH
GBFD-119201
11-Bit EGPRS Access
1278709421
BSC.ACC.RAC H.11BIT. 1PHASE.ACCE SS.REQ
ZA9405:Numbe BSC6900 r of 11-Bit One Phase Access Requests Received on RACH per BSC
GBFD-119201
11-Bit EGPRS Access
1279169421
RACH.11BIT. A9405:Number BSC6900 1PHASE.ACCE of 11-Bit One SS.REQ Phase Access Requests Received on RACH
GBFD-119201
11-Bit EGPRS Access
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NE
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
9 Glossary
9
Glossary
For the acronyms, abbreviations, terms, and definitions, see Glossary.
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GSM BSS 11-Bit EGPRS Access Feature Parameter Description
10 Reference Documents
10
Reference Documents
1. 2. 3. 4.
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3GPP TS 43.064: “Overall description of the GPRS Radio Interface; Stage 2” 3GPP TS 48.018: “BSS GPRS Protocol (BSSGP)” 3GPP TS 44.060: “Radio Link Control (RLC) / Medium Access Control (MAC) protocol” 3GPP TS 44.018: “Radio Resource Control (RRC) protocol”
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