TRX Cooperation(GBSS13.0 02)

8/12/2019 TRX Cooperation(GBSS13.0 02)

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TRX CooperationGBSS13.0

Feature Parameter Description

Issue 02

Date 2012-06-30

HUAWEI TECHNOLOGIES CO., LTD.


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Copyright Huawei Technologies Co., Ltd. 2012. 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 orrepresentations 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 the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]
http://www.huawei.com/http://www.huawei.com/mailto:[email protected]:[email protected]:[email protected]://www.huawei.com/


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TRX Cooperation Contents

Issue 02 (2012-06-30) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd

i

Contents

1 About This Document .............................................................................................................. 1-11.1 Scope ............................................................................................................................................ 1-11.2 Intended Audience......................................................................................................................... 1-11.3 Change History .............................................................................................................................. 1-1

2 Overview...................................................................................................................................... 2-13 Technical Description .............................................................................................................. 3-1

3.1 BCCH TRX Cooperation ............................................................................................................... 3-13.1.1 BSC-controlled BCCH TRX cooperation .............................................................................. 3-13.1.2 BSC-Collaborated BCCH TRX Cooperation ........................................................................ 3-43.1.3 BTS-Controlled BCCH TRX Channel Cooperation .............................................................. 3-7

3.2 Baseband FH TRX Cooperation ................................................................................................... 3-84 Related Features ....................................................................................................................... 4-15 Impact on the Network............................................................................................................. 5-2

5.1 Impact on System Capacity........................................................................................................... 5-25.2 Impact on Network Performance ................................................................................................... 5-2

6 Engineering Guidelines ........................................................................................................... 6-36.1 When to UseTRX Cooperation ...................................................................................................... 6-36.2 Deploying TRX Cooperation ......................................................................................................... 6-36.3 Performance Optimization ............................................................................................................. 6-36.4 Troubleshooting ............................................................................................................................. 6-3

7 Parameters.................................................................................................................................. 7-48 Counters ...................................................................................................................................... 8-19 Glossary ...................................................................................................................................... 9-110 Reference Documents ......................................................................................................... 10-1


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TRX Cooperation 1 About This Document



1-1

1 About This Document

1.1 Scope

This document describes the GBFD-113801 TRX Cooperation feature, including BCCH TRXcooperation and baseband FH TRX cooperation.

1.2 Intended Audience

This document is intended for:

Personnel who need to understand the TRX Cooperation feature

Personnel who work with Huawei GSM products

1.3 Change History

The section provides information about the changes in different document versions.

There are two types of changes, which are defined as follows:

Feature change: refers to a change in the TRX Cooperation feature of a specific product version.

Editorial change: refers to a change in wording or the addition of the information that was notdescribed in the earlier version.

Document Issues

The document issues are as follows:

02(2012-06-30)

01 (2011-03-31)

Draft A (2011-01-15)

02 (2012-06-30)

This is the first release of GBSS13.0.

Compared with issue 01 (2011-03-31)) of GBSS13.0, this issue incorporates the changes described inthe following table.

ChangeType

Change Description Parameter Change

Featurechange

None None

Editorialchange

Added the following chapters:

Chapter4 "Related Features"

Chapter5 "Impact on the Network"

Chapter6 "Engineering Guidelines"

None

01 (2011-03-31)

This is the first release of GBSS13.0.
http://wirelessinfo/hedex/pages/GEB02153/01/GEB02153/01/resources/FPD/Intelligent%20Power%20Consumption%20Decrease.htm?ft=0&id=GEB02153_01_10091#_Ref313873035


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TRX Cooperation 1 About This Document



1-2

Compared with issue draft A (2011-01-15) of GBSS13.0, issue 01 (2011-03-31) of GBSS13.0 has nochange.

Draft A (2011-01-15)

This is the draft release of GBSS13.0.

Compared with issue 01 (2010-06-30) of GBSS12.0, issue Draft A (2011-01-15) of GBSS13.0 has nochange.


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TRX Cooperation 2 Overview



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2 Overview

TRX cooperation is categorized into the following types:

BCCH TRX cooperation

When the BCCH TRX fails, the BSC selects a normal TRX as the new BCCH TRX according to theTRX cooperation algorithm to ensure that the cell is functional. When the fault in the original BCCHTRX is rectified, the BSC can switch the main BCCH back to the original TRX.

When the physical TRX board or channel bound to a logical TRX fails, the BTS binds the logical TRXto a normal TRX board or channel, ensuring that the logical TRX works normally.

Baseband FH TRX cooperation

Baseband FH TRX cooperation is a function enabled by the BSC when a TRX involved in FH is faultyin a cell whoseFHMODEis set to BaseBand_FH(Baseband frequency hopping). In such a case,the BSC removes the faulty TRX from the FH group, whereas other TRXs in the FH group remainBaseBand_FH(Baseband frequency hopping).

TRX cooperation ensures that the cell works normally when faults occur on the TRXs in the cell.

From the time of service disruption due to TRX failure to the time of service recovery after TRX cooperation, the systemdetermines whether TRX cooperation is required, hands over the calls in the faulty cell to another cell, and re-initializesthe cell.

TRX cooperation is not triggered within a certain period after the cell is initialized. The period isdetermined byAIDDELAYPROTECTTIME.By default,AIDDELAYPROTECTTIMEis set to 15 minutes.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.html


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TRX Cooperation 3 Technical Description



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3 Technical Description

3.1 BCCH TRX Cooperation

When the BCCH TRX in a cell is unavailable, the BSC designates another available TRX in the cell toreplace the original BCCH TRX, ensuring that the cell is functional. When the fault in the original BCCHTRX is rectified, the BSC can switch the main BCCH back to the original TRX.

BCCH TRX cooperation involves the following:

BCCH TRX cooperation

BCCH TRX switchback

BCCH TRX cooperation can be classified into the following types by the initiator:

BSC-controlled BCCH TRX cooperation

BSC-collaborated BCCH TRX cooperation

BTS-controlled BCCH TRX channel cooperation

3.1.1 BSC-controlled BCCH TRX cooperation

BSC-controlled BCCH TRX cooperation means that the BSC controls BCCH TRX cooperation and theBTS implements BCCH TRX cooperation.

BSC-controlled BCCH TRX cooperation involves the following:

BSC-Controlled BCCH TRX Cooperation

BSC-Controlled BCCH TRX Switchback

BSC-Controlled BCCH TRX Cooperation

BCCH TRX cooperation is triggered when the BTS reports the status change message regarding thefollowing:

The operating status of the current main BCCH is DISABLED.

The availability status of the current main BCCH must be one of those listed inTable 3-1.

Table 3-1Availability status and meaning

Availability Status Description

POWER_OFF Indicates that the equipment is powered off.

FAILED Indicates that the equipment fails.

NOT_INSTALLED_REAL Indicates that the equipment is not installed.

DEPENDENCY Indicates that the equipment is unavailable becauseof other faulty equipment.

The cell ID in the BCCH TRX cooperation message is used to identify the cell where BCCH TRXcooperation is performed. BCCH TRX cooperation can be performed concurrently in different cells.

The process of BCCH TRX cooperation is as follows:


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3-2

1. When a cell satisfies the conditions for BCCH TRX cooperation, the BSC starts a protection timerwith the duration as one minute.

The 1-minute protection timer can avoid TRX cooperation caused by unstable TRX status.

2. After the protection timer expires, the BSC checks whether the cell satisfies the conditions for TRXcooperation again.

If the cell satisfies the conditions, the BSC forcibly hands over all the calls in the cell and starts a10-second timer.

If the cell does not satisfy the conditions, the BSC terminates the process of TRX cooperation.

3. After all the calls in the cell are handed over or the 10-second timer expires, the BSC selects anavailable TRX in the cell to replace the original BCCH TRX.

4. The BSC initializes the cell and sends the new configuration data to the BTS. In addition, the BSCexchanges the configuration data of the original BCCH TRX with the configuration data of thecooperating TRX. Then, BCCH TRX cooperation is complete.

BSC-Controlled BCCH TRX SwitchbackAfter the BCCH TRX cooperation, if the fault on the original BCCH TRX in the cell is rectified, BCCHTRX switchback is performed. The configuration data of the two TRXs involved in TRX cooperation isadjusted, and the initial configuration data of the cell is restored.

The process of BCCH TRX switchback is reverse to that of BCCH TRX cooperation. The differencesbetween them are the triggering conditions and processing. TRX switchback is controlled byTRXAIDSWITCH.

BCCH TRX switchback is triggered when the BTS reports a status change message indicating that theoperating status of the original main BCCH is DISABLED.

The cell ID in the BCCH TRX switchback message is used to identify the cell where BCCH TRXswitchback is performed. BCCH TRX switchback can be performed concurrently in different cells.

If the triggering conditions are satisfied, BCCH TRX switchback is performed. Finally, the initialconfiguration data before TRX cooperation is restored.

Algorithm for Selecting the Cooperating TRX

The TRX boards to which each logical TRX belongs differ in the frequency band andPOWT ;therefore,selection of a cooperating TRX should satisfy certain conditions.

Mandatory conditions

The original BCCH TRX and the candidate TRX must be in the same BTS cabinet group.

The TRX board bound to the original BCCH TRX can exchange the frequency with the TRX boardbound to the candidate TRX. The exchanged frequencies must belong to the frequency bandsupported by the TRX board.

If the original BCCH TRX or the candidate TRX is connected to the Power Boost Unit (PBU), the PBUmust support the exchanged frequencies.

The antenna feeder boards connected to the original BCCH TRX and candidate TRX must supportthe exchanged frequencies. The antenna feeder boards include the Combing and Distribution Unit(CDU), Enhanced Duplexer Unit (EDU), Dual-Duplexer Unit for DTRU BTS (DDPU), Filter CombinerUnit for DTRU BTS (DFCU), and Filter Combiner Unit for DTRU BTS (DFCB). Besides the precedingconditions, the DFCU and DFCB must meet the requirements for the Absolute Radio FrequencyChannel Number (ARFCN) difference. The requirements are as follows:

For the frequencies on the 900/850 MHz band, the ARFCN difference must be at least 3.

For the frequencies on the 1800/1900 MHz band, the ARFCN difference must be at least 2.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.html


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3-3

The QTRU(Quadruple-Transceiver Unit) adopts the power sharing technology; therefore, themaximum power can be set to different values when the numbers of logical TRXs bound to the QTRUare different. If the TRX board of the original BCCH TRX or the candidate TRX is a QTRU, the powerof the TRX after BCCH TRX cooperation cannot be greater than the maximum power of the QTRU.

Condition for Selecting Preferable TRXsIn a cell, multiple candidate TRXs may satisfy the mandatory conditions. These candidate TRXs arefiltered to select an optimum cooperating TRX with the minimum impact on services.Table 3-2lists theconditions for selecting preferable TRXs. The priorities of the conditions decrease from the top down.

Table 3-2 Conditions for selecting preferable TRXs

PRI Condition for SelectingPreferable TRXs

Description

1 HW_Concentric Attribute The candidate TRX with thesame concentric attribute asthat of the original BCCH TRX is

preferably selected. That is,they are in an underlaid subcellor an overlaid subcell.

2 QTRU bandwidth If the original BCCH TRX or thecandidate TRX is bound to aQTRU, the candidate TRX thatmeets the bandwidthrequirement of every carrierfrequency of the QTRU afterfrequency exchange ispreferably selected.

If neither the original BCCHTRX nor the candidate TRX isbound to a QTRU, the conditionis considered as satisfied.

3 Support of EDGE The candidate TRX that has thesame capability in supportingthe EDGE as the original BCCHTRX is preferably selected. Thatis, both of them support theEDGE or neither of themsupports the EDGE.

4 RF send and receive modes ofthe TRX The candidate TRX that is thesame as the original BCCH TRXin the RFRCVMDandSNDMDis preferably selected.

If neither of the original BCCHTRX nor the candidate TRXsupports the RFRCVMDandSNDMD,this condition isconsidered as satisfied.

5 CBCH configuration The candidate TRX that is notconfigured with the CBCH ispreferably selected.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.html


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PRI Condition for SelectingPreferable TRXs

Description

6 PDCH configuration The candidate TRX that is notconfigured with the PDCH ispreferably selected.

Do as follows to select the cooperating TRX based on the conditions listed inTable 3-2:

1. Apply the condition with the highest priority to filter all the non-BCCH TRXs in the cell.

If only one logical TRX satisfies the condition after filtering, the logical TRX is selected as thecooperating TRX.

If multiple logical TRXs satisfy the condition, these logical TRXs are used in the next round of filtering,as described in step2.

If no logical TRX satisfies the condition, all logical TRXs are used in the next round of filtering, asdescribed in step2.

2. Apply the condition with the priority one level lower to filter the logical TRXs available for furtherfiltering.


If multiple logical TRXs or no logical TRX satisfies the condition after filtering, repeat step2.

If multiple logical TRXs or no logical TRXs satisfy the condition of the lowest priority, select any one ofthese logical TRXs as the cooperating TRX.

3.1.2 BSC-Collaborated BCCH TRX Cooperation

BSC-collaborated BCCH TRX cooperation is performed by the BSC and the BTS. The fundamentals arethe same as those of BSC-controlled BCCH TRX cooperation. The difference between them is that theBTS initiates BCCH TRX cooperation and selects the cooperating TRX in BSC-collaborated BCCH TRXcooperation. The BSC only exchanges the configuration data of the original BCCH TRX with theconfiguration data of the cooperating TRX upon the cooperation request of the BTS.

BSC-collaborated BCCH TRX cooperation involves the following:

BSC-collaborated BCCH TRX cooperation

BSC-collaborated BCCH TRX switchback

BSC-Collaborated BCCH TRX Cooperation

The triggering conditions of BSC-collaborated BCCH TRX cooperation are the same as those ofBSC-controlled BCCH TRX cooperation. When the BTS detects that the main BCCH satisfies thefollowing conditions, BCCH TRX cooperation is triggered:

The operating status of the current main BCCH is DISABLED.

The availability status of the current main BCCH must be one of those listed inTable 3-3.


Availability Status Meaning




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3-5

Availability Status Meaning


DEPENDENCY Indicates that the equipment is unavailable because

of other faulty equipment.

The process of BSC-collaborated BCCH TRX cooperation is as follows:

1. When a cell satisfies the conditions for BSC-collaborated BCCH TRX cooperation, the BTS starts aprotection timer with the duration as two minutes.


2. After the protection timer expires, the BTS sends a request to the BSC for forcibly handing over allthe calls in the cell and starts a 10-second timer.

3. After the handovers of all the calls in the cell are complete or the 10-second timer expires, the BTSselects a functional cooperating TRX in the cell and sends a TRX cooperation request to the BSC.

4. The BSC initializes the cell and sends the new configuration data to the BTS. In addition, the BSCexchanges the configuration data of the original BCCH TRX with the configuration data of thecooperating TRX. Then, BCCH TRX cooperation is complete.

BSC-Collaborated BCCH TRX Switchback

After BSC-collaborated BCCH TRX cooperation, if the fault on the original BCCH TRX in the cell isrectified, BSC-collaborated BCCH TRX switchback is performed. The configuration data of the two TRXsinvolved in TRX cooperation is adjusted, and the initial configuration data of the cell is restored.

The process of BCCH TRX switchback is reverse to that of BCCH TRX cooperation. The differencesbetween them are the triggering conditions and processing. TRX switchback is controlled byTRXAIDSWITCH.

The triggering conditions of BSC-collaborated BCCH TRX switchback are as follows:

The BTS detects that the operating status of the original main BCCH is ENABLED.

TRXAIDSWITCHis set to TRX Aiding Not Allowed.

The triggering conditions of TRX cooperation are not satisfied after dynamic configuration. If the BCCHTRX is still faulty after BCCH TRX switchback, BCCH TRX cooperation is triggered again.

If the triggering conditions are satisfied, BCCH TRX switchback is performed. The process of BCCHTRX switchback is reverse to that of BCCH TRX cooperation. Finally, the initial configuration data before

TRX cooperation is restored.


The TRX boards to which each logical TRX belongs differ in the frequency band andPOWT ;therefore,selection of a cooperating TRX should satisfy certain conditions.


The original BCCH TRX and the candidate TRX must have the same power type.

The original BCCH TRX and the candidate TRX must be the same in the RFRCVMDandSNDMD.

After TRX cooperation, the frequencies of the original BCCH TRX must belong to the frequency bandof the board that carries the candidate TRX.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.html


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After TRX cooperation, the frequencies of the original BCCH TRX must meet the bandwidthrequirements of the board that carries the candidate TRX. The bandwidth consists of the tributaryoutput bandwidth and the board input bandwidth.

Conditions for selecting preferable TRXs

In a cell, multiple candidate TRXs may satisfy the mandatory conditions. These candidate TRXs arefiltered to select an optimum cooperating TRX with the minimum impact on services.Table 3-4lists theconditions for selecting preferable TRXs. The priorities of the conditions decrease from the top down.

Table 3-4 Conditions for selecting preferable TRXs

Priority Condition Meaning

1 Diversity The candidate TRX that is thesame as the original BCCH TRXin the RFRCVMDandSNDMDis preferably selected.

If theSNDMDof the RF TRX is

set to Diversity Transmitter,the candidate TRX whosediversity can work normally afterTRX cooperation is preferablyselected.

2 Frequency band The candidate TRX whosefrequencies are on thefrequency band of the boardthat carries the original BCCHTRX is preferably selected.

3 Bandwidth The candidate TRX whose

frequencies meet the bandwidthrequirement of the board thatcarries the original BCCH TRXis preferably selected.

4 CBCH configuration The candidate TRX that is notconfigured with the CBCH ispreferably selected.

5 PDCH configuration The candidate TRX that is notconfigured with the PDCH ispreferably selected.

Do as follows to select the cooperating TRX based on the conditions listed inTable 3-4:

1. Apply the condition with the highest priority to filter all the non-BCCH TRXs in the cell.


If multiple logical TRXs satisfy the condition, these logical TRXs are used in the next round of filtering,as described in step2.

If no logical TRX satisfies the condition, all logical TRXs are used in the next round of filtering, asdescribed in step2.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.html


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2. Apply the condition with the priority one level lower to filter the logical TRXs available for furtherfiltering.


If multiple logical TRXs or no logical TRX satisfies the condition after filtering, repeat step2.

If multiple logical TRXs or no logical TRXs satisfy the condition of the lowest priority, select any one ofthese logical TRXs as the cooperating TRX.

3.1.3 BTS-Controlled BCCH TRX Channel Cooperation

When the physical TRX board or channel bound with a logical TRX carrying the BCCH fails, the BTSbinds the logical TRX to a functional TRX board or channel, ensuring that the logical TRX works properly.In BTS-controlled BCCH TRX channel cooperation mode, the parameters of the logical TRX are notchanged; however, the physical TRX board or channel bound to the logical TRX is changed.

BTS-controlled BCCH TRX channel cooperation is performed by the BTS independently without thecooperation of the BSC.

BTS-controlled BCCH TRX channel cooperation involves the following:

BTS-controlled BCCH TRX channel cooperation

BTS-controlled BCCH TRX channel switchback

BTS-Controlled BCCH TRX Channel Cooperation

The triggering condition of BTS-controlled BCCH TRX channel cooperation is the same as that ofBSC-collaborated BCCH TRX cooperation.

If the original BCCH TRX has the LAPD alarm or is manually blocked, BTS-controlled BCCH TRXchannel cooperation is not performed.

BTS-Controlled BCCH TRX Channel Switchback

The triggering condition of BTS-controlled BCCH TRX channel switchback is the same as that ofBSC-collaborated BCCH TRX switchback.


If no TRXs on the board meet the requirements for BCCH TRX cooperation, a TRX on the antennatributary is bound to the TRX on the tributary of the BCCH TRX, ensuring that the BCCH TRX can worknormally.

The algorithm for selecting a TRX on the board is the same as the algorithm for selecting the

cooperating TRX in BSC-collaborated BCCH TRX cooperation. The algorithm of the cooperationbetween the TRX on the antenna tributary and the TRX on the tributary of the BCCH TRX is describedas follows:


The 3G TRX is not configured on the tributary of the original BCCH TRX and the candidate tributary.

The tributary of the original BCCH TRX and the candidate tributary must belong to the same cell.

The board of the tributary that carries the original BCCH TRX is the same as the board of thecandidate tributary in the frequency band.

For M series TRX modules configured with two transmit channels, the number of TRXs configured onthe candidate tributary must be the same as the number of TRXs configured on the tributary of theBCCH TRX.


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3-8

The cooperating TRX must meet the requirement of the candidate tributary for the maximum outputpower.

The cell where the original BCCH TRX is located is not configured with the multi-site cell function.

Conditions for selecting preferable TRXs

Multiple channels or boards may satisfy the mandatory conditions. These channels or boards arefiltered to select an optimum channel or board as the cooperating channel or board based on theconditions listed inTable 3-5.The priorities of the conditions decrease from the top down.

Table 3-5 Conditions for selecting preferable channels or boards

Priority Condition for SelectingPreferable TRXs

Meaning

1 Bandwidth of the original BCCHTRX

The original BCCH TRX shouldmeet the bandwidth requirementof the board after TRX channelcooperation.

2 Bandwidth of the cooperatingchannel

The cooperating channel shouldmeet the bandwidth requirementof the board that carries theoriginal BCCH TRX after TRXchannel cooperation.

3 Diversity bandwidth when theRFSNDMDof the logical TRXbound to the original mainBCCH is Diversity Transmitter

If the RFSNDMDof the logicalTRX bound to the original mainBCCH is DiversityTransmitter, the diversityshould meet the bandwidthrequirement of the cooperating

channel after TRX channelcooperation.

4 Diversity bandwidth when theRFSNDMDof the cooperatingchannel is DiversityTransmitter

If the RFSNDMDof thecooperating channel isDiversity Transmitter, thediversity should meet thebandwidth requirement of thecooperating channel after TRXchannel cooperation.

3.2 Baseband FH TRX Cooperation

Baseband FH TRX cooperation is a function enabled by the BSC when a TRX involved in FH is faulty ina cell whoseFHMODEis set to BaseBand_FH(Baseband frequency hopping)or RF_FH(RFfrequency hopping). In such a case, the BSC removes the faulty TRX from the FH group, whereasother TRXs in the FH group remain BaseBand_FH(Baseband frequency hopping). After the fault isrectified, the BSC enables the TRX to join the FH group and involve in baseband FH again.

Baseband FH TRX cooperation involves the following:

Baseband FH TRX Cooperation

Baseband FH TRX Switchback
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.html


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Baseband FH TRX Cooperation

Baseband FH TRX cooperation can be performed only in baseband FH cell when any of the followingconditions is satisfied:

BCCH TRX cooperation is performed in the cell. The BTS reports the status change message indicating that the operating status of the TRX involved in

baseband FH is DISABLED and the availability status of the TRX involved in baseband FH is one ofthose listed inTable 3-6.


Availability Status Description




DEPENDENCY Indicates that the equipment is unavailable becauseof other faulty equipment.

The cell ID in the baseband FH TRX cooperation message is used to identify the cell where basebandFH TRX cooperation is performed. Baseband FH TRX cooperation can be performed concurrently indifferent cells.

The process of baseband FH TRX cooperation is as follows:

1. When a cell satisfies the conditions for baseband FH TRX cooperation, the BSC starts a protection

timer with the duration as one minute.


2. After the protection timer expires, the BSC checks whether the cell satisfies the conditions for TRXcooperation again.

If the cell satisfies the conditions, the BSC forcibly hands over all the calls in the cell and starts a10-second timer.

If the cell does not satisfy the conditions, the BSC terminates the process of TRX cooperation.

3. After all the calls in the cell are handed over or the 10-second timer expires, the BSC removes thefrequency of the faulty TRX from the MA list and adjusts the MAIO of other TRXs in the FH group.Meanwhile, other TRXs in the FH group remain BaseBand_FH(Baseband frequency hopping).

4. The BSC initializes the cell and sends the new configuration data to the BTS.

Baseband FH TRX Switchback

When the faults in the baseband FH TRX in the cell are rectified, the BSC reverts the FH mode of the cellto Baseband FH. TRX switchback is controlled byTRXAIDSWITCH.

If some faulty TRXs in a baseband FH group are restored, the system takes actions according to thesetting of the parameterBHPREPOLICY .If the parameter is set to ALL(All), the system performsbaseband FH TRX switchback after all the faulty TRXs in the FH group are restored. If the parameter isset to PART(Part), the system performs baseband FH TRX switchback after any of the faulty TRXs inthe FH group is restored. After the switchback, the FH group remains in the state of baseband FH TRX

cooperation. In such a case, the FH group contains only the TRXs in the normal state. The faulty TRXsremain NO_FH(No frequency hopping). After all the faulty TRXs are restored, the fault is rectified.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.html


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3-10

The process of baseband FH TRX switchback is reverse to that of baseband FH TRX cooperation. Thedifferences between them are the triggering conditions and processing.

Baseband FH TRX switchback can be performed only in the baseband FH cell and is triggered by therequired status change message reported from the BTS. The object in the baseband FH TRX

switchback message must be of the BT level and must be the TRX involved in the baseband FH. Theoperating status of the original baseband FH TRX must be ENABLED.

The cell ID in the baseband FH TRX switchback message is used to identify the cell where baseband FHTRX switchback is performed. Baseband FH TRX switchback can be performed concurrently in differentcells.


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TRX Cooperation 4 Related Features



4-1

4 Related Features

Feature Prerequisite Feature Mutually ExclusiveFeature

Affected Feature

Baseband FH TRXcooperation

GBFD-113701

Frequency Hopping(RF hopping,baseband hopping)

GBFD-113702

BCCH CarrierFrequency Hopping

GBFD-510104

Multi-site Cell

GBFD-118701 RANSharing

Note:

If the channel carrying theBCCH TRX is faulty afterthe preceding featuresare enabled, TRXCooperation for theBCCH TRX does not take

effects.

None


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TRX Cooperation 5 Impact on the Network



5-2

5 Impact on the Network

5.1 Impact on System Capacity

After BCCH TRX cooperation and baseband FH TRX cooperation are enabled, the number of availableTRXs in a cell decreases, decreasing cell capacity. When the traffic volume in a cell exceeds the cellcapacity, traffic congestion may occur.

When certain TRXs enter the intelligent shutdown state to decrease power consumption during off-peakhours, congestion does not occur after baseband FH TRX cooperation is enabled.

When BCCH TRX cooperation and baseband FH TRX cooperation are disabled, or the requirements forenabling BCCH TRX cooperation and baseband FH TRX cooperation are not met, a cell is out of servicewhen its BCCH TRX or the TRX participating in FH is faulty. Services in the cell are recovered after TRXfaults are rectified.

5.2 Impact on Network PerformanceWhen the traffic volume in a cell exceeds the cell capacity, traffic congestion may occur.


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TRX Cooperation 6 Engineering Guidelines



6-3

6 Engineering Guidelines

6.1 When to UseTRX Cooperation

You are advised to enable TRX Cooperation in all scenarios to reduce the GSM cell out-of-serviceduration.

6.2 Deploying TRX Cooperation

For details about how to activate, verify, and deactivate this feature, seeConfiguring TRX Cooperation.

6.3 Performance Optimization

Monitoring

N/A

Parameter Optimization

N/A

6.4 Troubleshooting

N/A
http://localhost/var/www/apps/conversion/tmp/FAGHtml/mbsc/m-bsc-reconfiguration-guide/GBFD-113801.htmlhttp://localhost/var/www/apps/conversion/tmp/FAGHtml/mbsc/m-bsc-reconfiguration-guide/GBFD-113801.htmlhttp://localhost/var/www/apps/conversion/tmp/FAGHtml/mbsc/m-bsc-reconfiguration-guide/GBFD-113801.htmlhttp://localhost/var/www/apps/conversion/tmp/FAGHtml/mbsc/m-bsc-reconfiguration-guide/GBFD-113801.html


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TRX Cooperation 7 Parameters



7-4

7 Parameters

Table 7-1 Parameter description

Parameter ID NE MML Command Feature ID Feature Name DescriptionAIDDELAYPROTECTTIME

BSC6900 SETGCELLSOFT(Optional)

GBFD-113801

TRXCooperation

Meaning: Delay time formutual-aid detection on a cellafter the cell is initialized. Whenthe cell initialization has justfinished, the cell is in anunstable state. Mutual-aiddetection at this time maycause a wrong decision.Therefore, this parameter isused for specifying properdelay.

GUI Value Range: 1~60

Actual Value Range: 1~60

Default Value: 15

Unit: min

BHPREPOLICY

BSC6900 SETGCELLCCACCESS(Optional)

GBFD-113801

TRXCooperation

Meaning: Mutual-aidswitchback policy of basebandfrequency hopping (FH). Ifmultiple TRXs in a basebandFH group are faulty andswitchback is needed after

mutual aid of the baseband FHTRXs occurs: If you chooseALL, mutual-aid switchback isimplemented after all the TRXsin the FH group recover; if youchoose PART, as long as anyof the faulty TRXs recovers, it ischanged back at once andadded to the FH group.

GUI Value Range: ALL(All),PART(Part)

Actual Value Range: ALL,

PART

Default Value: ALL

Unit: None

FHMODE BSC6900 SETGCELLHOPTP(Optional)

GBFD-113701

FrequencyHopping (RFhopping,basebandhopping)

Meaning: This parameterspecifies the frequency hoppingmode of a cell. When thisparameter is set to "NO_FH",all the TRXs of the cell do notoin in frequency hopping.When this parameter is set to"BaseBand_FH", the cell is in

baseband frequency hopping
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellhoptp.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellhoptp_fhmode.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_bhprepolicy.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellsoft.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellsoft_aiddelayprotecttime.html


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7-5

Parameter ID NE MML Command Feature ID Feature Name Description

mode. In this case, there canbe TRXs that do not join infrequency hopping on the cell.

When this parameter is set to"RF_FH", the cell is in RFfrequency hopping mode. Inthis case, there can be TRXsthat do not join in frequencyhopping on the cell. When thisparameter is set to"Hybrid_FH", the cell is inhybrid frequency hopping. Inthis case, some TRXs on thecell must join in basebandfrequency hopping, some cells

on the cell must join in RFfrequency hopping, and somecells on the cell must not join infrequency hopping.

GUI Value Range: NO_FH(Nofrequency hopping),BaseBand_FH(Basebandfrequency hopping), RF_FH(RFfrequency hopping),Hybrid_FH(Hybrid frequencyhopping)

Actual Value Range: NO_FH,

BaseBand_FH, RF_FH,Hybrid_FH

Default Value: NO_FH

Unit: None

POWT BSC6900 SETGTRXDEV(Optional)

MRFD-210301

ConfigurationManagement

Meaning: This parameterspecifies the maximum transmitpower supported by the poweramplifier of the TRX. The macroBTS and the mini BTS supportdifferent power levels.

GUI Value Range: 80W(80W),63W(63W), 60W(60W),55W(55W), 50W(50W),45W(45W), 40W(40W),31W(31W), 30W(30W),27W(27W), 26W(26W),25W(25W), 24W(24W),21W(21W), 20W(20W),19W(19W), 18W(18W),17W(17W), 16W(16W),15W(15W), 14W(14W),13_3W(13.3W), 13W(13W),12_5W(12.5W), 12W(12W),

11_5W(11.5W), 11W(11W),
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_powt.html


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7-6


10W(10W), 9_5W(9.5W),9W(9W), 8_5W(8.5W),8W(8W), 7_5W(7.5W),

7W(7W), 6_5W(6.5W),6W(6W), 5_5W(5.5W),5W(5W), 4_5W(4.5W),4W(4W), 3_7W(3.7W),3_1W(3.1W), 3W(3W),2_5W(2.5W), 2W(2W),1_5W(1.5W), 1W(1W),200mW(200mW),DEFAULT(Default)

Actual Value Range: 80W,63W, 60W, 55W, 50W, 45W,40W, 31W, 30W, 27W, 26W,

25W, 24W, 21W, 20W, 19W,18W, 17W, 16W, 15W, 14W,13_3W, 13W, 12_5W, 12W,11_5W, 11W, 10W, 9_5W, 9W,8_5W, 8W, 7_5W, 7W, 6_5W,6W, 5_5W, 5W, 4_5W, 4W,3_7W, 3_1W, 3W, 2_5W, 2W,1_5W, 1W, 200mW, DEFAULT

Default Value: DEFAULT

Unit: None

RCVMD BSC6900 SET

GTRXDEV(Optional)

MRFD-210

301

Configuration

Management

Meaning: RF receive mode of

the TRX.

The BTS3012, BTS3012AE,BTS3012II, BTS3006C, andBTS3002E do not support MainDiversity.

The DBS3900 GSM andBTS3900 GSM support FourDiversity Receiver and MainDiversity.

GUI Value Range:INDEPENDENT(Independent

Receiver), DIVIDING(DividingReceiver),FOURDIVERSITY(FourDiversity Receiver),MAINDIVERSITY(MainDiversity), NONE(None)

Actual Value Range:INDEPENDENT, DIVIDING,FOURDIVERSITY,MAINDIVERSITY, NONE

Default Value: INDEPENDENT

Unit: None
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_rcvmd.html


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7-7


SNDMD BSC6900 SETGTRXDEV(Optional)

MRFD-210301

ConfigurationManagement

Meaning: RF send mode of theTRX.

The BTS3006C and BTS3002Edo not support Wide BandCombining, Power BoosterTechnology, DPBT, orTransmitter Independent orCombining.

The DBS3900 GSM GRRUdoes not support Wide BandCombining, TransmitterIndependent or Combining,Power Booster Technology, orDPBT.

The BTS3900 GSM andBTS3900A GSM do not supportTransmitter Independent orWide Band Combining.

GUI Value Range:NOCOMB(No Combination),PBT(PBT),WBANDCOMB(WidebandCombination),DIVERSITY(TransmitDiversity),DDIVERSITY(Dynamic

Transmit Diversity),DPBT(DPBT), DTIC(TransmitIndependency or Combination),NONE(none)

Actual Value Range:NOCOMB, PBT,WBANDCOMB, DIVERSITY,DDIVERSITY, DPBT, DTIC,NONE

Default Value: NOCOMB

Unit: None

TRXAIDSWITCH

BSC6900 SETGCELLCCACCESS(Optional)

GBFD-113801

TRXCooperation

Meaning: Whether TRX mutualaid is enabled for the BSC6900.TRX mutual aid is classified intomain BCCH mutual aid andbaseband frequency hopping(FH) mutual aid. If main BCCHmutual aid is enabled, theBSC6900 can switch a faultymain BCCH TRX over to afunctional TRX in the cell.When the original main BCCHTRX recovers, it can be

switched back based on the
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gcellccaccess.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gcellccaccess_trxaidswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-mml/set-gtrxdev.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/gtrxdev_sndmd.html


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7-8


parameter setting. If basebandFH mutual aid is enabled, theBSC6900 can remove a faulty

TRX from the baseband FHgroup to ensure the proper FH.The removed TRX will notparticipate in frequencyhopping. When the removedTRX recovers, the BSC6900determines whether to switchthe TRX back to the basebandFH group according to thevalue of the "Switchback Policyof Baseband FH Mutual Aid"parameter. If the parameter is

set to TRXAid_NotAllow, TRXmutual aid is not allowed. If theparameter is set toAllowReForbid, TRX mutual aidis allowed, but TRX switchbackis not allowed. If the parameteris set to AllowReImmed, TRXmutual aid is allowed, and thefaulty TRX is switched backimmediately when conditionsfor TRX switchback are met. Ifthe parameter is set toAllowReCheckRes, TRX mutualaid is allowed, and the faultyTRX is switched back whenconditions for TRX switchbackare met in the specifiedresource check period.

GUI Value Range:TRXAid_NotAllow(TRX AidingNot Allowed),AllowReForbid(Allowed &Recover Forbidden),AllowReImmed(Allowed &Recover Immediately),AllowReCheckRes(Allowed &Recover When Chk Res)

Actual Value Range:TRXAid_NotAllow,AllowReForbid, AllowReImmed,AllowReCheckRes

Default Value:AllowReCheckRes

Unit: None


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GSM BSS

TRX Cooperation 8 Counters



8-1

8 Counters

Table 8-1 Counter description

Counter ID Counter Name CounterDescription Feature ID Feature Name

1276071419 CELL.AIDING.BCCHAIDING R3710:Number ofCell BCCH MutualAids

GBFD-113801 TRXCooperation

1276071420 CELL.AIDING.BCCHRECOVER R3711:Number ofRecoveries afterCell BCCH MutualAids


1276071421 CELL.AIDING.HOPAIDING R3720:Number ofCell BasebandHopping MutualAids


1276071422 CELL.AIDING.HOPRECOVER R3721:Number ofRecoveries afterCell BasebandHopping MutualAids

http://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-543.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-543.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-544.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-544.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-545.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-545.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-546.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-546.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-546.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-545.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-544.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCCounterHtml/mbsc/m-perf/Mt-543.html


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GSM BSS

TRX Cooperation 9 Glossary



9-1

9 Glossary

For the acronyms, abbreviations, terms, and definitions, see theGlossary.
http://localhost/var/www/apps/conversion/tmp/scratch_1/Glossary.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_1/Glossary.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_1/Glossary.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_1/Glossary.htm


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TRX Cooperation 10 Reference Documents

10 Reference Documents

[1] BSC6900 Feature List

[2] BSC6900 Optional Feature Description

[3] BSC6900 GSM Parameter Reference

[4] BSC6900 GSM MML Command Reference

[5] BSC6900 GSM Performance Counter Reference