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23 TRX CooperationAbout This Chapter

23.1 Overview

This topic describes the TRX cooperation. When the TRXs in a cell incur a fault, The TRX

cooperation can ensure that the cell is functional.

23.2 Availability

This topic describes the availability of the TRX cooperation. The availability of the TRX

cooperation depends on the cooperation of relevant hardware and software.

23.3 ImpactThis topic describes the impact of the TRX cooperation on the system performance and other

features.

23.4 Technical Description

The technical description of the TRX cooperation consists of the description of the BCCH TRX

cooperation,baseband FH TRX cooperation and TRX cooperation algorithm.

23.5 Implementation

This topic describes the implementation TRX cooperation. The implementation of the TRX

cooperation refers to the configuration of the TRX cooperation.

23.6 Maintenance Information

This topic describes the maintenance information about the TRX cooperation. The maintenanceinformation about the TRX cooperation consists of alarms and performance counters

information.

23.7 References

None.

HUAWEI BSC6000 Base Station Subsystem

BSS Feature Description 23 TRX Cooperation

Issue 01 (2007-09-05) Huawei Technologies Proprietary 23-1


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23.1 Overview

This topic describes the TRX cooperation. When the TRXs in a cell incur a fault, The TRX

cooperation can ensure that the cell is functional.

Definition

When some TRXs in a cell are faulty, the cell may not be functional. The TRX cooperation can

ensure that the cell is functional.

The TRX cooperation is categorized into the following two ways:

l BCCH TRX cooperation

When a TRX carrying the BCCH is faulty, the BSC selects a normal TRX as a new BCCH

TRX according to the TRX cooperation algorithm. Thus, the cell can work normally. When

the fault of a TRX is rectified, the BSC hands over the BCCH to this TRX.

l Baseband FH TRX cooperation

When a TRX of the cell in Baseband FH mode is faulty, the BSC changes the mode to be

None FH temporarily to prevent the decrease in speech quality.

Purposes

When a TRX carrying the BCCH is faulty, all the services within this cell are interrupted. To

ensure the normal running of the cell services, the BSC initiates another TRX in the cell to

replace the faulty TRX. When the fault of a TRX is rectified, the BSC switches the BCCH on

this TRX.

When the TRX where the BCCH of a cell in baseband FH mode is faulty, some speech frames

are lost in the conversations where the FH channels are used. Thus, the quality of the call is

greatly influenced. To ensure the speech quality of the cell, the BSC initiates the baseband FH

TRX cooperation and changes the mode to be none FH. Thus, faults of a few TRXs do not

influence the speech quality of the cell. After the faults are rectified, the BSC recovers the FH

mode of the cell to be baseband FH.

The TRX cooperation detection, the cell traffic handover and cell reinitialization should be

performed by the system automatically after the fault occurs. All these processes take several

minutes.

NOTE

The TRX cooperation is not triggered in a duration after the cell initialization. The duration is controlled

by Aiding Delay Protect Time(min). The default value is 15 minutes.

Terms

Terms Definition

Original TRX carrying

the primary BCCH

Indicates the TRX carrying the primary BCCH configured on the

LMT by the user in the cell.

TRX cooperation The TRX cooperation algorithm specifies an available TRX to

replace the original TRX carrying the primary BCCH in the TRX

cooperation.

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BSS Feature Description

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Terms Definition

Current TRX carrying

the primary BCCH

Indicates the BCCH TRX that is being used after the TRX

cooperation.

Task per second Indicates the task that is performed every second in the system.

Abbreviation

Abbreviation Full Spelling

BCCH Broadcast Control CHannel

TCH Traffic CHannel

SDCCH Stand-alone Dedicated Control CHannel

PDCH Packet Data CHannel

CBCH Cell Broadcast CHannel

23.2 Availability

This topic describes the availability of the TRX cooperation. The availability of the TRX

cooperation depends on the cooperation of relevant hardware and software.

Network Elements Involved

Table 23-1 lists the network elements involved in the TRX cooperation.

Table 23-1 Network Elements Involved

MS BTS BSC MSC MGW SGSN GGSN HLR

NOTE

l : not involved

l : Involved

Software Releases

The TRX cooperation has no requirement for the BTS software. Table 23-2 lists the requirements

for the BSC software.

Table 23-2 GBSS products and related versions

Product Version

BSC BSC6000 V900R001C01 and later releases

BTS BTS30 All releases





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Product Version

BTS312 All releases

BTS3012A All releases

BTS3001C All releases



BTS3012 All releases

BTS3012AE All releases

23.3 ImpactThis topic describes the impact of the TRX cooperation on the system performance and other

features.

Impact on System Performance

The impacts of the BCCH TRX cooperation on the system performance are as follows:

l After the BCCH TRX cooperation, the BSC specifies a TRX as the BCCH TRX and the

number of available TCHs decreases. Thus, the the cell capacity is reduced. The more the

number of faulty TRXs are, the lower the capacity of the cell is.

l

If the TRX carries the PDCH, the PDCH is unavailable after the BCCH TRX cooperationand the decrease of the PS services capacity. If tthe TRX carries the CBCH, the CHCH is

unavailable after the BCCH TRX cooperation and the cell broadcast service is stopped.

l If either of the original TRX carrying the primary BCCH and cooperated TRX does not

support the EDGE, both of them do not support the EDGE after the BCCH TRX

cooperation.

l When the cell is a concentric cell and the cooperated TRX is in an overlaid subcell, the

coverage of the cell decreases after the TRX cooperation.

The impacts of the baseband FH BCCH TRX cooperation on the system performance are as

follows:

l When the baseband FH TRX cooperation occurs, the BSC changes the FH mode of the cellfrom Baseband FH to be None FH. The cell does not have the features of diversity

interference and anti-attenuation brought by the baseband FH.

l If the baseband FH mode of the cell is Baseband FH Joined By The TRX Carrying the

Primary BCCH and the TRX where the cell BCCH locates is faulty, both the BCCH TRX

cooperation and the baseband FH TRX cooperation occur. The BSC changes the FH mode

of the cell to be None FH. After all the TRX in the FH and the original TRX carrying the

primary BCCH are confirmed to be normal, the baseband FH cooperation changeback

occurs. That is, the BSC recoveries the FH mode of the cell to be Baseband FH.

Impact on Other Features

The impacts of the TRX cooperation on the system performance are as follows:

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l The TRX cooperation does not occur in the validation process of reconfigured data, the

duration of resources check and the duration of the BTS initialization.

l If the SDCCH dynamic adjustment, or full-rate/half-rate dynamic adjustment or PDCH

dynamic adjustment occurs in the cell, the type of the adjusted channels carried by the

related TRX is recovered to be the original type after the TRX cooperation or TRXcooperation changeback.

23.4 Technical Description

The technical description of the TRX cooperation consists of the description of the BCCH TRX

cooperation, baseband FH TRX cooperation and TRX cooperation algorithm.

23.4.1 BCCH TRX Cooperation

This topic describes the BCCH TRX cooperation. When a BCCH TRX of a cell is unavailable,

the BSC initiates another TRX to replace the faulty one to enable the cell to offer services

continuousl. When the fault of the original BCCH TRX is recitified, the BSC switches back the

BCCH to the original TRX.

23.4.2 Baseband FH TRX Cooperation

This topic describes the baseband FH TRX cooperation. The baseband FH TRX cooperation

refers to that when the TRX in the FH is faulty and the FH mode of the cell is Baseband FH,

the BSC initiates the baseband FH TRX cooperation and changes the FH mode of the cell to be

None FH. After the TRX faults are rectified, the BSC recovers the FH mode of the cell to be

Baseband FH.

23.4.3 TRX Cooperation Algorithm

The BSC uses the TRX cooperation algorithm to select the cooperated TRX in the TRX

cooperation.

23.4.1 BCCH TRX Cooperation

This topic describes the BCCH TRX cooperation. When a BCCH TRX of a cell is unavailable,

the BSC initiates another TRX to replace the faulty one to enable the cell to offer services

continuousl. When the fault of the original BCCH TRX is recitified, the BSC switches back the

BCCH to the original TRX.

BCCH TRX cooperation consists of the following:

l BCCH TRX cooperation

l BCCH TRX cooperation changeback

Description of the BCCH TRX Cooperation

The BCCH TRX cooperation is triggered by the required status change report message reported

by the BTS.

The requirements of the BCCH TRX cooperation are as follows:

l The object in the message should be at the channel level and is the active BCCH of the cell.

If the cooperation occurs, the object should be the current BCCH.

NOTE

If the BCCH TRX cooperation occurs, the object should be the active BCCH after the cooperation.





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l The status of the active BCCH is DIABLED.

l The availability status of the active BCCH should be one of those listed in the .

Table 23-3 Availability Status and Meaning

Availability Status Meaning

POWER_OFF Indicates the equipment is powered off.

FAILED Indicates the equipment is faulty.

NOT_INSTALLED_REAL Indicates the equipment is not installed.

DEPENDENCY Indicates the equipment is unavailable because of

other faulty equipment.

The cell number in the BCCH TRX cooperation message is used to identify the cell where the

BCCH TRX cooperation occurs. The BCCH TRX cooperation of different cells can beperformed at the same time.

The procedure of the BCCH TRX cooperation is as follows:

1. After a cell meets the requirement of initializing the BCCH TRX cooperation, start the

protection timer and set the duration of the timer to one minute.

NOTE

The protection timer with the duration of one minute can avoid the TRX cooperation because of

unstable TRX status.

2. When the protection timer expires, the BSC detects whether the cell meets the requirement

of the TRX cooperation.l If the cell meets the requirement of the TRX cooperation, the BSC sends the forced

switch request to all the calls in the cell and starts the 10-second timer.

l If the cell does not meet the requirement of the TRX cooperation, the BSC stops the

process of the TRX cooperation.

3. After all the call in the cell is handed over or the 10-second timer expires, the BSC specifies

another TRX as the BCCH TRX in the cell.

4. The BSC initializes the cell, and then delivers the configuration data to the BTS. The BSC

delivers the configuration data of the original BCCH TRX to the cooperated TRX and

delivers the configuration data of the cooperated TRX to the original BCCH TRX. The

cooperated TRX then provides services to the original BCCH TRX.

Description of the BCCH TRX Cooperation Switchback

After the faults of the original BCCH TRX in the cell that the BCCH TRX cooperation occurs

are rectified, the BCCH TRX cooperation changeback is performed in the cell. The data in the

two TRXs related to the cooperation is adjusted, and the original configuration data of the cell

is recovered.

The procedure of the BCCH TRX cooperation changeback is similar to that of the BCCH TRX

cooperation. The only difference lies in the triggering condition and the cooperation process

content. The time of the cooperation changeback can be controlled with parameters. The options

include Allowed & Recover Immediately, Allowed & Recover When Check Res andAllowed & Recover Forbidden.

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The BCCH TRX cooperation is triggered by the required status change report message reported

by the BTS.

The BCCH TRX cooperation changeback requires that the status of the original TRX carrying

the primary BCCH is ENABLED.

The cell number in the BCCH TRX cooperation changeback message is used to identify the cell

where the BCCH TRX cooperation changeback occurs. The BCCH cooperation changeback of

different cells can be performed at the same time.

The procedure of the BCCH TRX cooperation changeback is as follows:

1. After a cell meets the requirement of initializing the BCCH TRX cooperation changeback,

start the protection timers and set the duration of the timer to one minute.

NOTE

The protection timer with the duration of one minute can avoid the TRX cooperation changeback

because of the unstable TRX status.


of the TRX cooperation changeback.

l If the cell meets the requirement of the TRX cooperation changeback, the BSC sends

the forced switch request to all the calls in the cell and starts the 10-second timer.

l If the cell does not meet the requirement of the TRX cooperation changeback, the BSC

stops the process of the TRX cooperation changeback.

3. After all the call in the cell is handed over or the 10-second timer expires, the BSC specifies

another TRX as the BCCH TRX in the cell.

4. The BSC initializes the cell, and then delivers the configuration data to the BTS. The BSC

delivers the configuration data of the cooperated BCCH TRX to the original BCCH TRX

and delivers the configuration data of the original BCCH TRX to the cooperated TRX.

23.4.2 Baseband FH TRX Cooperation

This topic describes the baseband FH TRX cooperation. The baseband FH TRX cooperation

refers to that when the TRX in the FH is faulty and the FH mode of the cell is Baseband FH,

the BSC initiates the baseband FH TRX cooperation and changes the FH mode of the cell to be

None FH. After the TRX faults are rectified, the BSC recovers the FH mode of the cell to be

Baseband FH.

The baseband FH TRX cooperation consists of the following:

l Baseband FH TRX cooperationl Baseband FH TRX cooperation changeback

Description of the Baseband FH TRX Cooperation

The baseband FH TRX cooperation occurs only in the cell where the baseband FH occurs. The

cooperation is triggered by the required status change report sent by the BTS.

The requirements of the baseband FH TRX cooperation are as follows:

l The object in the message should be at BT level and should be the TRX in the baseband

FH.

l The status of the TRX is DISABLED.





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l The availability status of the TRX should be one of those listed in the .

Table 23-4 Availability Status and Meaning

Availability Status Meaning POWER_OFF Indicates that the equipment is powered off.

FAILED Indicates that the equipment is faulty.

NOT_INSTALLED_REAL Indicates that the equipment is not installed.

DEPENDENCY Indicates that the equipment is unavailable because

of other faulty equipment.

The cell number in the baseband FH TRX cooperation message is used to identify the cell where

the baseband FH TRX cooperation occurs. The baseband FH TRX cooperation of different cells

can be performed at the same time.

The procedure of the baseband FH TRX cooperation is as follows:

1. When a cell meets the requirement of initializing the baseband FH TRX cooperation, start

the protection timers and set the duration of the timer to one minute.

NOTE

The protection timer with the duration of one minute can avoid the TRX cooperation because of the

unstable TRX status.


of the TRX cooperation.

l

If the cell meets the requirement of the TRX cooperation, the BSC sends the forcedswitch request to all the calls in the cell and starts the 10-second timer.

l If the cell does not meet the requirement of the TRX cooperation, the BSC stops the

process of the TRX cooperation.

3. After the all the calls in the cell are handed over or the 10-second timer expires, the BSC

changes the FH mode of the cell from Baseband FH to be None FH.

4. The BSC initiates the cell and delivers the new configuration data to the BTS. Then the

BSC changes the FH mode of the cell from Baseband FH to be None FH.

Description of the Baseband FH TRX Cooperation Switchback

After the faults of the TRX in the cell where the baseband FH occurs are rectified, the BSCrecovers the FH mode of the cell to be Baseband FH. The time of the cooperation changeback

can be controlled with parameters. The options include Allowed & Recover Immediately,

Allowed & Recover When Check Res and Allowed & Recover Forbidden.

The procedure of the baseband FH TRX cooperation changeback is similar to that of the baseband

FH TRX cooperation. The only difference lies in the triggering condition and the cooperation

process content.

The baseband FH TRX cooperation changeback occurs only in the cell where the baseband FH

occurs. The cooperation is triggered by the required status change report sent by the BTS.

The baseband FH TRX cooperation changeback requires that the status of the original TRXcarrying the primary BCCH is ENABLED.

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The cell number in the baseband FH TRX cooperation changeback message is used to identify

the cell where the baseband FH TRX cooperation changeback occurs. The baseband FH TRX

cooperation changeback of different cells can be performed at the same time.

The procedure of the baseband FH TRX cooperation changeback is as follows:

1. When a cell meets the requirement of initializing the baseband FH TRX cooperation

changeback, start the protection timers and set the duration of the timer to one minute.

NOTE

Theprotection timer with the duration of one minute can avoid the TRX cooperation changeback

because of the unstable TRX status.


of the TRX cooperation changeback.

l If the cell meets the requirement of the TRX cooperation changeback, the BSC sends

the forced switch request to all the calls in the cell and starts the 10-second timer.

l

If the cell does not meet the requirement of the TRX cooperation changeback, the BSCstops the process of the TRX cooperation changeback.

3. After the all the calls in the cell are handed over or the 10-second timer expires, the BSC

changes the FH mode of the cell from None FH to be Baseband FH.

4. The BSC initiates the cell and delivers the new configuration data to the BTS. Then the

BSC changes the FH mode of the cell from None FH to be Baseband FH.

23.4.3 TRX Cooperation Algorithm

The BSC uses the TRX cooperation algorithm to select the cooperated TRX in the TRX

cooperation.

The TRX cooperation consists of the following three phases:

l Default status

l Preprocessing status

l Handling Status

In the TRX cooperation, the BSC uses the following two protection measures to ensure the

communication quality of the radio network:

l Preprocessing protection: aviods the frequent TRX cooperation because of TRX

intermittent.

l Postprocessing protection: provides enough time for the call in the cell where the TRX

cooperation will occur.

23.4.3.1 Checking the Availability Status of Cells

This topic describes how to check the availability status of cell to confirm whether the cells meet

the requirement of TRX cooperation.

23.4.3.2 Checking the TRX Status

This topic describes the TRX status check. The TRX status check indicates to specify the type

of the TRX cooperation in the cell according to the TRX status.

23.4.3.3 Preprocessing the TRX Cooperation

This topic describes the preprocessing of the TRX cooperation. The process of the TRX

cooperation preprocessing consists of two phrases: searching for the cooperated TRX andPostprocessing the TRX cooperation.





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Checking the Availability Status of Cells

This topic describes how to check the availability status of cell to confirm whether the cells meet

the requirement of TRX cooperation.

The cell status check is triggered by the one-second task. The 512 cells are checked periodically.

In the cell status check, the BSC ignores the cell in the abnormal state and finds the cell meeting

the requirements of the TRX cooperation.

The cells in abnormal state are as follows:

l TAIDING_EXPT_CELL_NOT_INSTALL

l AIDING_EXPT_IN_INITIAL_PROCESS

l AIDING_EXPT_OML_ABNORMAL

l AIDING_EXPT_DATA_ADJUST_DISABLE

l AIDING_EXPT_NOT_AIDING_BUTT

l AIDING_EXPT_INITIAL_PROTECT

After the BSC finds the normal cell, the TRX cooperation process is started.

Checking the TRX Status

This topic describes the TRX status check. The TRX status check indicates to specify the type

of the TRX cooperation in the cell according to the TRX status.

Determination Conditions of the BCCH TRX CooperationTable 23-5 shows the determination conditions of the BCCH TRX cooperation. The BCCH

TRX cooperation and the BCCH TRX cooperation changeback occur only when all the

conditions in Table 23-5.

are met.

Table 23-5 Determination conditions of the BCCH TRX cooperation

Determination Conditions of the BCCHTRX Cooperation

Determination Conditions of theBCCH TRX Cooperation Switchback

The TRX Aiding Function Control Switch

in the cell is enabled.

The TRX Aiding Function Control

Switch in the cell is enabled.

The status of the current BCCH is

DISABLED.

The TRX where the current BCCH is located

is not the original one where the BCCH

locates.

The availability status of the BCCH is either

of the POWER_OFF, FAILED

NOT_INSTALLED_REAL and

DEPENDENCY.

The status of the original BCCH is

ENABLED.

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Determination Conditions of the Baseband FH TRX Cooperation

Table 23-6 shows the determination conditions of the baseband FH TRX cooperation. The

baseband FH TRX cooperation and the baseband FH TRX cooperation changeback occur only

when all the conditions in Table 23-6.

Table 23-6 Determination conditions of the baseband FH TRX cooperation and changeback

Determination Conditions of theBaseband FH TRX Cooperation

Determination Conditions of theBaseband FH TRX CooperationSwitchback

The TRX cooperation in the cell is allowed. The TRX cooperation changeback in the cell

is allowed.

The FH mode of the cell is Baseband FH. The BSC changes the FH mode of the cell

from Baseband FH to be None FH.

The baseband FH TRX cooperation does not

occur in this cell. That is, all the TRXs in the

baseband FH are normal.

The status of the original BCCH is

ENABLED.

The status of at least one TRX in the

baseband FH is either POWER_OFF,

FAILED, NOT_INSTALLED_REA or

DEPENDENCY.

The status of all the TRXs in the baseband FH

is ENABLED.

NOTE

When the BCCH TRX cooperation occurs in the cell where the BTS FH occurs, the BSC initiates the

baseband FH TRX cooperation forcibly and changes the FH mode of the cell from Baseband FH to beNone FH.

After the TRX status check is complete, the TRX cooperation processing is existed if the BSC

detects that no TRX cooperation is needed. If the BSC detects that the conditions of the TRX

cooperation are meet, the preprocessing timer is started. The duration of the timer is one minute.

When the preprocessing timer expires, the BSC starts the processing of TRX cooperation

preprocessing.

The BSC then checks the TRX status again to avoid the frequent TRX cooperation because of

TRX intermittence. If the BCCH TRX cooperation is necessary after the check, the BSC starts

the process to search the cooperated TRX.

Preprocessing the TRX Cooperation

This topic describes the preprocessing of the TRX cooperation. The process of the TRX

cooperation preprocessing consists of two phrases: searching for the cooperated TRX and

Postprocessing the TRX cooperation.

Searching for the Cooperated TRX

Before starting the BCCH TRX cooperation, the BSC should select a normal TRX as the

candidate cooperated TRX in the cell.

In the selection, configuration of the TRX should be considered.

The following TRXs cannot be selected as the candidate cooperated TRX:





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l The TRX where the BCCH is located

l The TRX that is in different TMUs with the original BCCH TRX (The cooperation of the

TRX carrying the primary BCCH cannot be performed in different cabinet groups.)

l The TRX that the status is DISABLED

l The TRX that cannot exchange frequencies with the original BCCH TRX (The CDU and

PBU which the TRX is locates does not support the original active BCCH frequencies.)

l The TRX related to the RF FH in the cavity combiner

l The TRX that is in the different cavity combiner with the original BCCH TRX and the TRX

of which the frequency spacing is less than 3 after the frequency exchange

The BSC puts all the available TRXs in the cell into the candidate TRXs queue, and then orders

them according to priorities. The TRX with the highest priority is selected as the BCCH

cooperated TRX.

The priorities are determined as follows: Each TRX is assigned with a byte. The byte is set to

OXFF originally. Each bit indicates whether the related function is supported. When certaincondition is met, this bit is set to 0. The smaller the value is, the higher the priority level is.

Figure 23-1 lists the priority level determination method of the candidate TRX.

Figure 23-1 Priority level determination method of the candidate TRX

bit6 bit5 bit4 bit3 bit2 bit1 bit0

No PDCH

No CBCH

Consistent

mode of

supporting

EDGEUnderlaid

subcell

TRX

bit7

Reserved

Consistent

transmit and

receive modes

Table 23-7 describes the meaning of parameters in the priority level determination method of

the candidate TRX.

Table 23-7 Parameters in the priority level determination method of the candidate TRX

Bit Meaning

bit0 bit0=0: The candidate TRX has no configured PDCH.

bit1 bit1=0: The candidate TRX has no configured CBCH.

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Bit Meaning

bit2 bit2=0: The transmit and receive modes of the candidate TRX are the same with

that of the original TRX carrying the primary BCCH.

NOTEThe transmit and receive modes are the feature of the BTS3012. The DTRU of the BTS3012supports multiple RF transmit modes including the non-combining, PBT, wideband

combining and transmit diversity. The DTRU of the BTS3012 supports multiple RF receive

modes including independent receive, receive diversity and four-way receive diversity.

bit3 bit3=0: When the original TRX carrying the primary BCCH supports the EDGE,

the candidate TRX supports the EDGE. When the original TRX carrying the

primary BCCH does not support the EDGE, the candidate TRX does not support

the EDGE.

bit4 bit4=0: The candidate TRX is in the underlaid subcell.

When the cell is a concentric cell, the TRX carrying the primary BCCH is in the

underlaid subcell and the coverage is broad. If the TRX carrying the primaryBCCH has faults, the coverage of the cell decreases.

bit5 Reserved.

bit6

bit7

In the TRX cooperation, the cell should be initialized. The calls in this cell should be handed

over to the other cells in order not to influence the speech quality. After the TRX cooperation

preprocessing, the BSC initiates the postprocess timer with the duration of 10 seconds. Thus, all

the calls in this cell have enough time to be handed over.

Postprocessing the TRX Cooperation

After the postprocessing timer expires, the BSC starts the postprocessing.

The TRX cooperation postprocessing includes the following:

l Modifying the dynamic variables

The system records the number of the cooperated TRXs, the original and the current BCCH

TRXs. The cooperated TRX and the original BCCH TRX map with each other. When the

current BCCH TRX returns to the original configuration, the system delivers the

configuration information to the related TRXs according to the mapping rule during thecell initialization.

l Sending alarms

The alarms consists of401 BCCH Mutual Aid in a Cell, 402 Switchback after BCCH

Mutual Aid in a Cell, 409 Cell BCCH Aiding to IUO_INN TRX, 403 Baseband FH

Mutual Aid in a Cell and 404 Switchback after Baseband FH Mutual Aid in a Cell.

l Request the reinitialization of the cell

The cell should be reinitialized in both the BCCH TRX cooperation and the baseband FH

TRX cooperation. In the cell initialization of the BCCH TRX cooperation, all the

configurations of the original BCCH TRX and the cooperated TRX, except the attributes

about whether support the AMR and the transmit and receive mode of the RF, exchangewith each other.



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23.5 Implementation

This topic describes the implementation TRX cooperation. The implementation of the TRX

cooperation refers to the configuration of the TRX cooperation.

23.5.1 Configuring TRX Cooperation

This topic describes how to configure the TRX cooperation. The TRX cooperation parameters

are configured on the BSC6000 Local Maintenance Terminal.

23.5.1 Configuring TRX Cooperation

This topic describes how to configure the TRX cooperation. The TRX cooperation parameters

are configured on the BSC6000 Local Maintenance Terminal.

Context

The TRX cooperation switch is at the cell level. That is, the TRX cooperation switches can be

enabled or disabled independently in all the cells.

Procedure

Step 1 On the BSC6000 Local Maintenance Terminal, select a cell on the Management Tree tabpage. Right-click the cell, and then select Configure Cell Attributes from the shortcut menu.

A dialog box is displayed, as shown in Figure 23-2.

Figure 23-2 Selecting a cell for configuring the attributes

Step 2 Add the cell from the Cell view list to the Selected cells list, as shown in Figure 23-3.

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Figure 23-3 Adding a cell to the Selected cells list

Step 3 ClickNext. A dialog box is displayed, as shown in Figure 23-4.

Figure 23-4 Selecting the attribute to be configured

Step 4 Select the cell from the Cells to be set list box and clickSet Cell Properties. A dialog box isdisplayed, as shown in Figure 23-5.





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Figure 23-5 Configuring the cell attributes

Step 5 In the Advanced Attributes area, clickCall Control. A dialog box is displayed, as shown inFigure 23-6.

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Figure 23-6 Setting call control parameters

Step 6 ClickAdvanced. A dialog box is displayed, as shown in Figure 23-7.





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Figure 23-7 Setting call control advanced parameters

Step 7 Select the Call Control tab and set the TRX Aiding Function Control to TRX Aiding NotAllowed, Allowed & Recover Immediately orAllowed Recover When Check Res, as shown

in Figure 23-8.

Figure 23-8 Setting access control parameters

NOTE

The default value of the TRX Aiding Function Control is Allowed Recover When Check Res. Thus,

the TRX cooperation function of each cell is enabled by default.

Step 8 ClickOKto return to the dialog box shown in Figure 23-5.

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Step 9 ClickOKto save the parameters configuration. A dialog box is displayed, as shown in Figure23-4.

Step 10 ClickFinish to complete the configuration of the TRX cooperation parameters.

----End

23.6 Maintenance Information

This topic describes the maintenance information about the TRX cooperation. The maintenance

information about the TRX cooperation consists of alarms and performance counters

information.

Alarms

Table 23-8 lists the alarms of the TRX cooperation.

Table 23-8 Aarms of the TRX cooperation

Alarm ID Alarm Name

401 BCCH Mutual Aid in a Cell

402 Switchback after BCCH Mutual Aid in a Cell

403 Baseband FH Mutual Aid in a Cell

404 Switchback after Baseband FH Mutual Aid in a Cell

409 Cell BCCH Aiding to IUO_INN TRX

Counters

Table 23-9 lists the performance counters of the TRX cooperation.

Table 23-9 Performance counters of the TRX cooperation

Counter Description

R3710 Cell BCCH Mutual Aids

R3711 Recoveries after Cell BCCH Mutual Aids

R3720 Cell Baseband Hopping Mutual Aids

R3721 Recoveries after Cell Baseband Hopping Mutual Aids

23.7 References

None.



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