Activating and Testing BSS10016 and BSS10118: Common BCCH Control for GSM

GSM/EDGE BSS, Rel. RG30(BSS), Operating Documentation, Issue 04

Activate

Activating and Testing BSS10016 and BSS10118: Common BCCH Control for GSM

DN00273887

Issue 8-1Approval Date 2010-06-01

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Activating and Testing BSS10016 and BSS10118:Common BCCH Control for GSM

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Table of contentsThis document has 43 pages.

Summary of changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1 Activating Common BCCH Control for GSM 900 / GSM 1800 . . . . . . . . 61.1 Creating a multi-band cell (segment) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.1.1 Creating a BTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71.1.2 Deleting the old BCCH channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81.1.3 Creating a TRX and the BCCH channel . . . . . . . . . . . . . . . . . . . . . . . . . 91.1.4 Modifying the MS txpwr max gsm (PMAX1) parameter for the new PGSM

900 band BTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.1.5 Defining the maximum transmission power for MS accessing the cell . 101.1.6 Modifying the power control parameters of the segment . . . . . . . . . . . . 101.1.7 Modifying the early sending indication (ESI) parameter for the Common

BCCH segment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111.1.8 Defining the signal level difference with the non BCCH layer offset (NBL)

parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111.1.9 Defining the load limit for a BTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121.1.10 Defining the threshold value for the estimated downlink signal level on the

non-BCCH frequency layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121.1.11 Defining the threshold value for handing over an MS from the non-BCCH

frequency layer to the BCCH frequency layer . . . . . . . . . . . . . . . . . . . . 131.1.12 Modifying the handover control parameters of the segment . . . . . . . . . 131.1.13 Creating adjacent cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141.1.14 Deleting an adjacent cell of the segment . . . . . . . . . . . . . . . . . . . . . . . . 141.1.15 Modifying BA list <option> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151.1.16 Creating a BA list and attaching it to a segment <option> . . . . . . . . . . . 151.1.17 State management of the BTSs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161.1.18 Checking postcondition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171.2 Cancelling the expansion of the segment . . . . . . . . . . . . . . . . . . . . . . . 171.2.1 Locking the segment's BTSs and deleting its BCCH channel . . . . . . . . 171.2.2 Moving the BTS using the PGSM 900 frequency band to its own segment

181.2.3 Defining a BCCH TRX for the BTSs using the GSM 1800 and PGSM 900

frequency bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181.2.4 Defining the maximum transmission power for an MS accessing the cell for

both segments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191.2.5 Defining the HOC, POC, and ADJ parameters for the moved BTS . . . . 191.2.6 State management of the BTSs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201.3 Moving a BTS from one segment to another existing segment . . . . . . . 211.3.1 Locking all BTSs in the old and the new segment . . . . . . . . . . . . . . . . . 211.3.2 Moving the BTS from the old segment to another existing segment . . . 221.3.3 Unlocking all BTSs in the old and the new segment . . . . . . . . . . . . . . . 23

2 Activating Common BCCH Control for GSM 800 / GSM 1900 . . . . . . . 242.1 Creating a multi-band cell (segment) . . . . . . . . . . . . . . . . . . . . . . . . . . . 252.1.1 Creating a BTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252.1.2 Deleting the old BCCH channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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2.1.3 Creating a TRX and the BCCH channel . . . . . . . . . . . . . . . . . . . . . . . . . 262.1.4 Modifying the MS txpwr max gsm (PMAX1) parameter for the new BTS us-

ing the GSM 800 band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272.1.5 Defining the maximum transmission power for MS accessing the cell . . 272.1.6 Modifying the power control parameters of the segment . . . . . . . . . . . . 282.1.7 Modifying the early sending indication (ESI) parameter for the Common

BCCH segment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282.1.8 Defining the signal level difference with the parameter non BCCH layer off-

set (NBL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292.1.9 Defining the load limit for a BTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.1.10 Defining the threshold value for the estimated downlink signal level on the

non-BCCH frequency layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.1.11 Defining the threshold value for handing over an MS from the non-BCCH

frequency layer to the BCCH frequency layer. . . . . . . . . . . . . . . . . . . . . 312.1.12 Modifying the handover control parameters of the segment. . . . . . . . . . 312.1.13 Creating adjacent cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322.1.14 Deleting an adjacent cell of the segment . . . . . . . . . . . . . . . . . . . . . . . . 322.1.15 Modifying the BA list <option> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332.1.16 Creating a BA list and attaching it to a segment <option> . . . . . . . . . . . 332.1.17 State management of the BTSs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342.1.18 Checking postcondition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352.2 Cancelling the expansion of the segment . . . . . . . . . . . . . . . . . . . . . . . . 352.2.1 Locking the segment's BTSs and deleting its BCCH channel. . . . . . . . . 352.2.2 Moving the BTS using the GSM 800 frequency band to its own segment .

362.2.3 Defining a BCCH TRX for the BTSs using the GSM 1900 and GSM 800 fre-

quency bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362.2.4 Defining the maximum transmission power for an MS accessing the cell for

both segments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362.2.5 Defining the HOC, POC, and ADJ parameters for the moved BTS . . . . 372.2.6 State management of the BTSs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382.3 Moving a BTS from one segment to another existing segment . . . . . . . 392.3.1 Locking all the BTSs in the old and the new segment . . . . . . . . . . . . . . 392.3.2 Moving the BTS from the old segment to a new existing segment . . . . . 402.3.3 Unlocking all the BTSs in the old and the new segment. . . . . . . . . . . . . 40

3 Testing Common BCCH Control for GSM 900 / GSM 1800 and Common BCCH Control for GSM 800 / GSM 1900 . . . . . . . . . . . . . . . . . . . . . . . . 42

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Summary of changes

Id:0900d8058077ac3eConfidential

Summary of changesChanges between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

Changes made between issues 8-1 and 8-0Flexi Multiradio BTS and BTSplus BTS have been added to the list of BTSs in the con-figuration requirements.

The term Nokia has been removed from the product names.

Changes made between issues 8-0 and 7-1Editorial changes have been made.

Changes made between issues 7-1 and 7-0Information on checking the activation of the FIFILE parameters before starting the acti-vation of Common BCCH Control has been added in sections Activating Common BCCH Control for GSM 900 / GSM 1800 and Activating Common BCCH Control for GSM 800 / GSM 1900.

Information on the cell's BCCH carrier has been modified in section Activating Common BCCH Control for GSM 900 / GSM 1800.

Changes made between issues 7-0 and 6-1Flexi EDGE BTS has been added to the list of BTSs in the configuration requirements.

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Activating Common BCCH Control for GSM 900 / GSM 1800

1 Activating Common BCCH Control for GSM 900 / GSM 1800Configuration requirementsBTS: Talk-family BTS (SW release DF6 or later)

or

UltraSite EDGE BTS (SW release CX3 or later)

or

MetroSite EDGE BTS (SW release CXM3 or later)

or

Flexi EDGE BTS (any SW release)

or

Flexi Multiradio BTS (any SW release)

or

BTSplus BTS (any SW release)

NetAct: OSS 3.1 ED or later

BSC: S10.5 ED or later

There are no hardware effects.

Common BCCH Control is activated on cell level by configuring a cell with transceiv-ers (TRXs) of different frequency bands as separate BTS objects in the cell.

Common BCCH Control requires that:

• The COMMON_BCCH_GSM900, COMMON_BCCH_EGSM900, and SEGMENT_USAGE options are set on when you want to use the PGSM 900 and EGSM 900 frequency band TRXs in the same segment.

• The COMMON_BCCH_GSM900, COMMON_BCCH_GSM1800, and SEGMENT_USAGE options are set on when you want to use the PGSM 900 and GSM 1800 frequency band TRXs in the same segment.

• The COMMON_BCCH_EGSM900, COMMON_BCCH_GSM1800, and SEGMENT_USAGE options are set on when you want to use the EGSM 900 and GSM 1800 frequency band TRXs in the same segment.

• The COMMON_BCCH_GSM900, COMMON_BCCH_EGSM900, COMMON_BCCH_GSM1800, and SEGMENT_USAGE options are set on when you want to use the PGSM 900, EGSM 900, and GSM 1800 frequency band TRXs in the same segment.

You can check the status of the relevant options by using the following commands:

• COMMON_BCCH_GSM900: ZWOS:2,666; • COMMON_BCCH_GSM1800: ZWOS:2,667; • COMMON_BCCH_EGSM900: ZWOS:2,664; • SEGMENT_USAGE: ZWOS:2,665;

If any of the above-mentioned parameters has the value FALSE, you can activate them with the following command: ZWOA:2,<parameter number>,A;

The SEGMENT_USAGE option introduces the segment (SEG) radio network object.

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Activating Common BCCH Control for GSM 900 / GSM1800


When the COMMON_BCCH_GSM900 and COMMON_BCCH_EGSM900 options are in use, you can also configure TRXs of both PGSM 900 and EGSM 900 frequencies into one single BTS object in the cell/segment.

It is not necessary to create the BCCH in the GSM 900 frequency band in a multi-band segment. It can also be created in the GSM 1800 frequency band. In these instructions, the BCCH of a multi-band segment is on the GSM 900 frequency band as an example.

t You must define the GPRS territory to the BCCH frequency band in a Common BCCH cell in which more than one frequency band is in use. Otherwise GPRS does not work properly in the cell.

The reason for this requirement is that in cases when the BSC does not know the MS RAC of the GPRS mobile station (MS), the temporary block flow (TBF) must first be allocated on the BCCH frequency band. During the first TBF allocation, the GPRS mobile station indicates its frequency capability to the BSC. After that other frequency bands of the cell can be used for the GPRS mobile station accordingly.

For activation instructions of Common BCCH Control for GSM 800 / GSM 1900, see Activating Common BCCH Control for GSM 800 / GSM 1900.

For testing instructions, see Testing Common BCCH Control for GSM 900 / GSM 1800 and Common BCCH Control for GSM 800 / GSM 1900.

For a description of Common BCCH Control, see Common BCCH Control in BSC under Feature descriptions/Radio network performance in the PDF view.

1.1 Creating a multi-band cell (segment)PurposeCreate a multi-band segment (SEG) by creating a new PGSM 900 BTS to an existing GSM 1800 segment.

You can use the create BTS (EQC) and create TRX (ERC) MML commands or NetAct to create a new BTS.

Before you startThe existing segment needs to have one BTS using the GSM 1800 frequency band that has all TRXs in the working (WO) state. During the BSC software installation, the system has created a SEG for each existing BTS. The number of the SEG is the same as the number of the related BTS, for example BTS-12 => SEG-12.

1.1.1 Creating a BTS

Steps

1 Check the information on all the TRXs of the SEG (EEI).With the EEI MML command you can get information about all the BTSs and TRXs of the SEG.

ZEEI:SEG=<seg_id>;

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2 Create a BTS (GSM 900) to a segment that has one BTS using the GSM 1800 fre-quency band (EQC).

t Because the segment already exists, the MML does not allow you to define the cell (seg-ment) specific parameters. Only BTS-specific parameters are allowed.

ZEQC:BCF=<bcf_id>,BTS=<bts_id>,SEG=<seg_id>:BAND=900;

3 Check the information on all the TRXs of the SEG (EEI).ZEEI:SEG=<seg_id>;

Further information

Example:

1. ZEEI:SEG=44;SEG-44:BCF-044 TALK-FAMILYBTS-044 (GSM 1800)TRX-001 (MBCCHC)TRX-002

2. ZEQC:BCF=44,BTS=77,SEG=44:BAND=900;

3. ZEEI:SEG=44;SEG-44:BCF-044 TALK-FAMILYBTS-044 (GSM 1800)TRX-001 (MBCCHC)TRX-002BTS-077 (GSM 900)

1.1.2 Deleting the old BCCH channelDelete the BCCH channel from the BTS using the GSM 1800 frequency band.

Steps

1 Lock the BTS that uses the GSM 1800 frequency band (EQS).ZEQS:BTS=<bts_id>:L;

2 Lock the BCCH TRX (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:L;

3 Delete the BCCH channel of the BTS and change it to a TCH channel (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=TCHF;

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Further information

Example:

1. ZEQS:BTS=44:L;

2. ZERS:BTS=44,TRX=1:L;3. ZERM:BTS=44,TRX=1:CH0=TCHF;

1.1.3 Creating a TRX and the BCCH channel

PurposeCreate a transceiver (TRX) for the new BTS using the PGSM 900 frequency band. Create the BCCH channel.

Steps

1 Create the BCCH TRX (ERC).ZERC:BTS=<bts_id>,TRX=<trx_id>::FREQ=<freq>,TSC=<nbr>,PCMTSL=<pcm-tsl>:DNBR=<nbr>:CH0=MBCCHC;

2 Check the information about all TRXs of the SEG (EEI).ZEEI:SEG=<seg_id>;

Further information

Example:

1. ZERC:BTS=77,TRX=3::FREQ=30,TSC=1,PCMTSL=40-1:DNBR=114:CH0=MBCCHC;

2. ZEEI:SEG=44;SEG-44:BCF-044 TALK-FAMILYBTS-044 (GSM 1800)TRX-001TRX-002BTS-077 (PGSM 900)TRX-003 (MBCCHC)

1.1.4 Modifying the MS txpwr max gsm (PMAX1) parameter for the new PGSM 900 band BTS

PurposeSkip this procedure if the default value of the parameter MS txpwr max gsm (PMAX1), that is, the maximum power level that an MS may use in the serving cell, is good enough.

Steps

1 Output the BTS parameters (EQO).ZEQO:SEG=<seg_id>:MIS;

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2 Modify the PMAX1 parameter of the BTS (EQM).ZEQM:SEG=<seg_id>:PMAX1=<value>;

Further information

Example:

1. ZEQO:SEG=44:MIS;

2. ZEQM:SEG=44:PMAX1=35;

1.1.5 Defining the maximum transmission power for MS accessing the cellThe maximum transmission power that an MS may use when accessing the BCCH or PCCCH of a cell, in which the BCCH is on the GSM 900 frequency band, is defined with the parameters MS txpwr max CCH (TXP1 and GPRS MS txpwr max CCH (GTXP1). The default value of both parameters is 33 dBm. You can skip this procedure if the default value is applicable for both parameters.

t If the segment has more than one BTS, you can modify the parameters only via segment identification.

Steps

1 Modify the TXP1 and GTXP1 parameters of the segment (EQG).Modify the MS txpwr max CCH (TXP1) and GPRS MS txpwr Max CCH (GTXP1) parameters.

ZEQG:SEG=<seg_id>:TXP1=<value>,GTXP1=<value>;

Further information

Example:

1. ZEQG:SEG=44:TXP1=35,GTXP1=31;

1.1.6 Modifying the power control parameters of the segment

PurposeSkip this procedure if the power control parameters of the BTS using the GSM 1800 band values are also applicable to the new BTS using the PGSM 900 frequency band. Check that the GSM 800 / GSM 900 frequency band specific power control parameter BS TX pwr max(PMAX1) has an applicable value. Otherwise, modify the power control parameters of the segment.

t If the segment has more than one BTS, you can modify the power control parameters only via segment identification. The new value is set for all the BTSs of the segment.

Steps

1 Output the power control parameters (EUO).ZEUO:SEG=<seg_id>;

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2 Modify the power control parameters (EUG).Modify the BS TX pwr max (PMAX1) parameter.

ZEUG:SEG=<seg_id>:PMAX1=<value>;

Further information

Example:

1. ZEUO:SEG=44;

2. ZEUG:SEG=44:PMAX1=10;

1.1.7 Modifying the early sending indication (ESI) parameter for the Common BCCH segment

PurposeThe value of the parameter ESI should be set to value Y in the Common BCCH segment. This value enables the BSC to receive information on the MS's frequency capability as quickly as possible. As a consequence, the resources of the non-BCCH fre-quency band of the segment can be used already in the call set-up phase.

Steps

1 Output the SEG parameters (EQO).ZEQO:SEG=<seg_id>:ALL;

2 Modify the ESI parameter (EQM).ZEQM:SEG=<seg_id>:ESI=<value>;

Further information

Example:

1. ZEQO:SEG=44:ALL;

2. ZEQM:SEG=44:ESI=Y;

1.1.8 Defining the signal level difference with the non BCCH layer offset (NBL) parameter

PurposeDefine the signal level difference between a BTS without the BCCH TRX and the BCCH BTS of the segment.

Steps

1 Modify the value of the NBL parameter (EQM).Modify the value of the non BCCH layer offset (NBL) parameter. The default value when creating a BTS is 0 dBm.

ZEQM:BTS=<bts_id>:NBL=<value>;

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Further information

Example: ZEQM:BTS=44:NBL=5;

t The parameters BS TX pwr max(PMAX1) and BS TX pwr max 1x00 (PMAX2) identify the maximum transmission power of the BTS as an attenuation from the peak power of the TRX. You have to take these parameters into account when defining the value for parameter non BCCH layer offset (NBL).

fGiving a positive value to the parameter non BCCH layer offset (NBL) prevents SDCCH allocation for call set-up and external handovers in the base transceiver station (BTS) in question. Always set the value of the parameter non BCCH layer offset to 0 in the BCCH BTS.

1.1.9 Defining the load limit for a BTSDefine the load limit for a BTS with the parameter BTS load in SEG (LSEG).

LSEG is used in controlling the load distribution between different BTSs in a segment. You can determine separate LSEG values for all BTSs of the segment. The default value when creating a BTS is 70%. If you want to change it, you can use the MML command EQM.

Steps

1 Modify the value of the BTS load in SEG parameter (EQM).ZEQM:BTS=<bts_id>:LSEG=<value>;

Further information

Example: ZEQM:BTS=77:LSEG=50;

1.1.10 Defining the threshold value for the estimated downlink signal level on the non-BCCH frequency layer

PurposeDefine the threshold value for a segment with the parameter non BCCH layer access threshold (LAR).

LAR is a threshold value for the estimated downlink signal level on the non-BCCH fre-quency layer of the segment for moving an MS from the BCCH frequency layer to the non-BCCH frequency layer. The default value is -90 dBm. If you want to change it, use the MML command EHS.

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Steps

1 Modify the value of the non BCCH layer access threshold parameter (EHS).ZEHS:SEG=<seg_id>:LAR=<value>;

Further information

Example: ZEHS:SEG=44:LAR=–80;

1.1.11 Defining the threshold value for handing over an MS from the non-BCCH frequency layer to the BCCH frequency layer

PurposeDefine the threshold for a segment with the following parameters:

• non BCCH layer exit threshold (LER)

• non BCCH layer exit threshold px (LEP) • non BCCH layer exit threshold nx (LEN)

LER is a threshold value for the measured downlink signal level on the non-BCCH fre-quency layer for handing over an MS from the non-BCCH frequency layer to the BCCH frequency layer. LEP and LEN can be used to define how many of the measurement reports must be below the LER to trigger the handover. The default value for LER is -95 dBm, the default value for LEP is 1, and the default value for LEN is 1. If you want to change the values, use the MML command EHS.

A handover from the non-BCCH frequency layer to the BCCH frequency layer is made only if the BCCH frequency layer of the segment has more coverage than the non-BCCH frequency layer. The BSC uses the three parameters only when the BCCH frequency layer of the segment has more coverage than the non-BCCH frequency layer. Otherwise the BSC ignores them.

Steps

1 Modify the non-BCCH layer exit threshold parameters (EHS).ZEHS:SEG=<seg_id>:LER=<value>,LEP=<value>,LEN=<value>;

Further information

Example: ZEHS:SEG=44:LER=–90,LEP=3,LEN=5;

1.1.12 Modifying the handover control parameters of the segment

PurposeSkip this procedure if the handover control parameters of the BTS using the GSM 1800 band values are applicable to the new BTS using the PGSM 900 frequency band. Oth-erwise, modify the handover control parameters of the segment.

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t If the segment has more than one BTS, you can modify the handover control parameters only via segment identification. The new value is set for all BTSs of the segment.

Steps

1 Output the handover control parameters (EHO).ZEHO:SEG=<seg_id>;

2 Modify the handover control parameters (EHG).Modify the enable SDCCH handover (ESD) parameter.

ZEHG:SEG=<seg_id>:ESD=Y;

Further information

Example:

1. ZEHO:SEG=44;2. ZEHG:SEG=44:ESD=Y;

1.1.13 Creating adjacent cells

PurposeCreate more adjacent cells, if needed. You can create adjacent cells with the EAC MML command, but if the segment has more than one BTS, you have to use segment identi-fication as a parameter instead of BTS identification.

Steps

1 Create an adjacent cell for a segment that has more than one BTS and is under another BSC (EAC).ZEAC:SEG=<seg_id>::LAC=<nbr>,CI=<nbr>:NCC=<nbr>,BCC=<nbr>,FREQ=<nbr>;

2 Create an adjacent cell for a segment that has more than one BTS and is under the same BSC (EAC).ZEAC:SEG=<seg_id>::ASEG=<aseg_id>;

Further information

Example:

1. ZEAC:SEG=44::LAC=199,CI=39:NCC=1,BCC=1,FREQ=20;

2. ZEAC:SEG=44::ASEG=99;

1.1.14 Deleting an adjacent cell of the segment

PurposeIn Common BCCH Control, the BSC adds the BCCH frequency of the serving segment among the BCCH frequencies that the MS should measure when on the non-BCCH fre-

DN00273887 15




quency band of the multi-band segment. This leads to the following restriction: a segment can have only 31 adjacent cells.

If Inter-System Handover (ISHO) is used with Common BCCH Control, the maximum number of adjacent cells is restricted to 30.

Skip this procedure if the segment does not have 32 or 31 adjacent cells. Otherwise, remove one or two adjacent cells of the segment.

Steps

1 Delete the adjacent cell (EAD).ZEAD:SEG=<seg_id>::ASEG=<aseg_id>;

Further information

Example: ZEAD:SEG=44::ASEG=88;

1.1.15 Modifying BA list <option>In Common BCCH Control, the BSC adds the BCCH frequency of the serving segment among the BCCH frequencies that the MS should measure when on the non-BCCH fre-quency band of the multi-band segment. This leads to the following restriction: there can be only 31 frequencies in a BCCH allocation list (BA list).

If Inter-System Handover is used with Common BCCH Control, the maximum number of frequencies in a BA list is restricted to 30.

Skip this procedure if the BA list is not used or if the BA list does not have 32 or 31 BCCH frequencies. Otherwise, remove one or two BCCH frequencies from the BA list.

Steps

1 Output the BA list usage parameters (EQO).ZEQO:SEG=<seg_id>:BCC;

2 Remove one BCCH frequency from the BA list (EBM).ZEBM:<id_nbr>,<function>:<freq>;

Further information

Example:

1. ZEQO:SEG=44:BCC;

2. ZEBM:15,R:37;

1.1.16 Creating a BA list and attaching it to a segment <option>Skip this procedure if BA lists are not used.

16 DN00273887




Steps

1 Create a BA list (EBC).

t If the BA list is going to be used for a segment which has more than one frequency band in use, the type (frequency band) of the BA list must be MULTI.

ZEBC:<id_nbr>,MULTI:<frequency>&<frequency>&<frequency>;

2 Attach the BA list to the segment (EQB).ZEQB:SEG=<seg_id>:IDLE=<ba_id>;

Further information

Example:

1. ZEBC:10,MULTI:12&15&20;

2. ZEQB:SEG=44:IDLE=10;

1.1.17 State management of the BTSsBecause the segment object has neither an operational nor an administrative state, you must unlock the BTSs of the segment one by one. The BCCH BTS must be unlocked first. When you unlock a non-BCCH BTS, the BCCH TRX of the segment must be in the working (WO) administrative state.

Steps

1 Unlock the BCCH TRX (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

2 Unlock the BTS containing the BCCH TRX (EQS).ZEQS:BTS=<bts_id>:U;

3 Unlock the TRXs of the BTS using the GSM 1800 frequency band (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

4 Unlock the BTS using the GSM 1800 frequency band (EQS).ZEQS:BTS=<bts_id>:U;

5 Unlock the BCF (EFS).ZEFS:<bcf_id>:U;

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Further information

Example:

1. ZERS:BTS=77,TRX=3:U;

2. ZEQS:BTS=77:U;3. ZERS:BTS=44,TRX=1:U;

ZERS:BTS=44,TRX=2:U;4. ZEQS:BTS=44:U;

5. ZEFS:44:U;

1.1.18 Checking postconditionAfter unlocking, all TRXs of the segment are in the WO state. A call should be possible via both BTSs. Synchronised handovers are used between the BTSs. The system has set synchronised handovers on by default.

Steps

1 Get information about all TRXs of the SEG (EEI).With the EEI MML command you can get information about all the TRXs of the SEG. The system outputs both BTSs and all TRXs of the segment.

ZEEI:SEG=<seg_id>;

Further information

Example: ZEEI:SEG=44;

1.2 Cancelling the expansion of the segmentYou can move either the BTS using the PGSM 900 frequency band or the BTS using the GSM 1800 frequency band to a new, separate segment. If you want to move the BTS which has the BCCH TRX, you must first delete the BCCH channel because moving a BTS containing a BCCH TRX is not allowed. All BTSs of the old segment must be in the locked state.

1.2.1 Locking the segment's BTSs and deleting its BCCH channel

Steps

1 Lock both BTSs and the BCCH TRX (EQS, ERS).ZEQS:BTS=<bts_id>:L;

ZEQS:BTS=<bts_id>:L;

ZERS:BTS=<bts_id>,TRX=<trx_id>:L;

2 Delete the BCCH channel and change it to a TCH channel (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=<TCHF>;

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Further information

Example:

1. ZEQS:BTS=44:L;ZEQS:BTS=77:L;ZERS:BTS=77,TRX=3:L;

2. ZERM:BTS=77,TRX=3:CH0=TCHF;

1.2.2 Moving the BTS using the PGSM 900 frequency band to its own segment

Steps

1 Move the BTS to a new segment (EQU).Move the base station BTS-77 to the segment SEG-88. Segment-specific parameters must be defined for the new segment.

ZEQU:BTS=<bts_id>:SEG=<seg_id>:CI=<nbr>:NCC=<nbr>,BCC=<nbr>:MCC=<nbr>,MNC=<nbr>,LAC=<nbr>;

Further information

Example: ZEQU:BTS=77:SEG=88:CI=5:NCC=1,BCC=1:MCC=1,MNC=1,LAC=15;

1.2.3 Defining a BCCH TRX for the BTSs using the GSM 1800 and PGSM 900 frequency bands

Steps

1 Lock a TRX of the BTS using the GSM 1800 frequency band (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:L;

2 Define the BCCH channel to the TRX of the BTS using the GSM 1800 frequency band (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=<MBCCHC>;

3 Define the BCCH channel to the TRX of the BTS using the PGSM 900 frequency band (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=<MBCCHC>;

Further information

Example:

1. ZERS:BTS=44,TRX=1:L;2. ZERM:BTS=44,TRX=1:CH0=MBCCHC;

3. ZERM:BTS=77,TRX=3:CH0=MBCCHC;

DN00273887 19




1.2.4 Defining the maximum transmission power for an MS accessing the cell for both segments

PurposeThe maximum transmission power that an MS may use when accessing the BCCH or PCCCH of a cell in which the BCCH is on the GSM 1800 frequency band is defined with the parameters MS txpwr max CCH1x00 (TXP2) and GPRS MS txpwr max CCH1x00 (GTXP2). The default value for both parameters is 30 dBm.

The maximum transmission power that an MS may use when accessing the BCCH or PCCCH of a cell in which the BCCH is on the GSM 900 frequency band is defined with the parameters MS txpwr max CCH (TXP1) and GPRS MS txpwr max CCH (GTXP1). The default value for both parameters is 33 dBm.

You can skip this procedure if the default values are applicable for both segments.


Steps

1 Modify the TXP2 and GTXP2 of the segment in which the BCCH is on the GSM 1800 frequency band (EQG).ZEQG:SEG=<seg_id>:TXP2=<value>,GTXP2=<value>;


Further information

Example:

1. ZEQG:SEG=44:TXP2=30,GTXP2=30;2. ZEQG:SEG=88:TXP1=33,GTXP1=33;

1.2.5 Defining the HOC, POC, and ADJ parameters for the moved BTS

PurposeModify the power control (POC) parameter values and handover control (HOC) values. Create adjacent cells for the BTS that was moved. The power control, handover control, and adjacencies do not follow the moved BTS to the new segment. You have to define the POC, HOC, and any adjacencies needed for the new segment as in BTS cre-ation.

You can modify the power control and handover control parameters via segment identi-fication or via BTS identification because the segment with the moved BTS has only one BTS.

20 DN00273887




Steps

1 Create power control parameters (EUC).Create power control parameters for the new segment using either the SEG or the BTS identifier.

ZEUC:SEG=<seg_id>;

or

ZEUC:BTS=<bts_id>;

2 Create handover control parameters (EHC).Create handover control parameters for the new segment using either the SEG or the BTS identifier.

ZEHC:SEG=<seg_id>;

or

ZEHC:BTS=<bts_id>;

3 Create an adjacent cell (EAC).Create an adjacent cell for the new segment. The adjacent cell is under the same BSC. You can use either the SEG or the BTS identifier.

ZEAC:SEG=<seg_id>::ABTS=<bts_id>;

or

ZEAC:BTS=<bts_id>::ABTS=<bts_id>;

Further information

Example:

1. ZEUC:SEG=88;orZEUC:BTS=77;

2. ZEHC:SEG=88;orZEHC:BTS=77;

3. Create the adjacent cell BTS-44 for the SEG-88.ZEAC:SEG=88::ABTS=44;orZEAC:BTS=77::ABTS=44;

1.2.6 State management of the BTSs

PurposeBecause the segment object has neither an operational nor an administrative state, you must unlock the BTSs of the segment one by one. The BCCH BTS must be unlocked first. When you unlock a non-BCCH BTS, the BCCH TRX of the segment must be in the working (WO) administrative state.

DN00273887 21




Steps

1 Unlock the BCCH TRX of the BTS that was moved (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

2 Unlock the BTS that was moved (EQS).ZEQS:BTS=<bts_id>:U;

3 Unlock the BCCH TRX of the BTS using the GSM 1800 frequency band (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;


Further information

Example:


2. ZEQS:BTS=77:U;3. ZERS:BTS=44,TRX=1:U;

4. ZEQS:BTS=44:U;

1.3 Moving a BTS from one segment to another existing segmentPurposeWhen you move a BTS from the old segment to another existing segment, all the BTSs in the old segment and in the new segment must be in the locked state. Moving a BTS which contains the BCCH TRX is not allowed. The BTS that was moved starts to use the new segment's parameters. After moving the BTS, you must unlock all the BTSs in the old and the new segment.

You can combine two segments in a similar way by moving all the BTSs of one segment to another existing segment. After you have moved the BTSs, the old segment does not exist any more.

t Note that when moving a BTS from one segment to another, the GPRS has to be disabled in all the BTSs in both segments.

1.3.1 Locking all BTSs in the old and the new segment

Steps

1 Get information about all BTSs and TRXs of both segments (EEI).ZEEI:SEG=<seg_id>;

ZEEI:SEG=<seg_id>;

22 DN00273887




2 Lock all the BTSs of the old segment (EQS).ZEQS:BTS=<bts_id>:L;


3 Lock all the BTSs of the new segment (EQS).ZEQS:BTS=<bts_id>:L;

Further information

Example:

1. ZEEI:SEG=33;SEG-33:BCF-033 TALK-FAMILYBTS-033 (GSM 900)TRX-001 (MBCCHC)TRX-002BTS-55 (GSM 900)TRX-3

ZEEI:SEG=66;SEG-66:BCF-066 TALK-FAMILYBTS-066 (GSM 900)TRX-001 (MBCCHC)TRX-002

2. ZEQS:BTS=33:L;ZEQS:BTS=55:L;

3. ZEQS:BTS=66:L;

1.3.2 Moving the BTS from the old segment to another existing segment

Steps

1 Move the BTS (EQU).ZEQU:BTS=<bts_id>:SEG=<seg_id>;

Further information

Example: Move the BTS-55 to the new existing segment SEG-66.

ZEQU:BTS=55:SEG=66;

DN00273887 23




1.3.3 Unlocking all BTSs in the old and the new segment

Steps

1 Unlock the BTS of the old segment (EQS).ZEQS:BTS=<bts_id>:U;

2 Unlock all BTSs of the new segment (EQS).You must first unlock the BTS that has the BCCH TRX.

ZEQS:BTS=<bts_id>:U;


3 Get information about all BTSs and TRXs of both segments (EEI). ZEEI:SEG=<seg_id>;

ZEEI:SEG=<bts_id>;

Further information

Example:

1. ZEQS:BTS=33:U;

2. ZEQS:BTS=66:U;ZEQS:BTS=55:U;

3. ZEEI:SEG=33;SEG-33:BCF-033 TALK-FAMILYBTS-033 (GSM 900)TRX-001 (MBCCHC)TRX-002

ZEEI:SEG=66;SEG-66:BCF-066 TALK-FAMILYBTS-066 (GSM 900)TRX-001 (MBCCHC)TRX-002BTS-55 (GSM 900)TRX-3

24 DN00273887


Id:0900d8058077a92cConfidential


2 Activating Common BCCH Control for GSM 800 / GSM 1900Configuration requirementsBTS: UltraSite BTS (SW release CX3 or later)

or

MetroSite BTS (SW release CXM3 or later)

or

Flexi EDGE BTS (any SW release)

or

Flexi Multiradio BTS (any SW release)

or

BTSplus BTS (any SW release)

NetAct: OSS 3.1 ED or later

BSC: S10.5 ED or later

There are no hardware effects.

Common BCCH Control is activated on cell level by configuring a cell with TRXs of dif-ferent frequency bands as separate BTS objects in the cell.

Common BCCH Control for GSM 800 / GSM 1900 requires that:

• The options COMMON_BCCH_GSM800, COMMON_BCCH_GSM1900, and SEGMENT_USAGE are set on when you want to use GSM 800 and GSM 1900 fre-quency band TRXs in the same segment.

You can check the status of the relevant options by using the following commands:

• COMMON_BCCH_GSM800: ZWOS:2,733; • COMMON_BCCH_GSM1900: ZWOS:2,734; • SEGMENT_USAGE: ZWOS:2,665;

If any of the above-mentioned parameters has the value FALSE, you can activate them with the following command: ZWOA:2,<parameter number>,A;

The SEGMENT USAGE option introduces the SEG radio network object.

It is not necessary to create the BCCH in the GSM 800 frequency band in a multi-band segment. It can also be created in the GSM 1900 frequency band. In these instructions, the BCCH of a multi-band segment is on the GSM 800 frequency band as an example.

t You must define the GPRS territory to the BCCH frequency band in a Common BCCH cell in which more than one frequency band is in use. Otherwise GPRS will not work properly in the cell. The reason for this requirement is that in cases when the BSC does not know the MS RAC of the GPRS mobile station, the temporary block flow (TBF) must first be allocated on the BCCH frequency band. During the first TBF allocation, the GPRS mobile station indicates its frequency capability to the BSC. After that other fre-quency bands of the cell can be used for the GPRS mobile station accordingly.

For testing instructions, see Testing Common BCCH Control for GSM 900 / GSM 1800 and Common BCCH Control for GSM 800 / GSM 1900.

DN00273887 25




For a detailed description of Common BCCH Control, see Common BCCH Control in BSC under Feature descriptions/Radio network perfomance in the PDF view.

2.1 Creating a multi-band cell (segment)PurposeCreate a multi-band segment by creating a new GSM 800 BTS to an existing GSM 1900 segment.

You can use the create BTS (EQC) and create TRX (ERC) MML commands or NetAct to create the new BTS.

Before you startThis existing segment has one BTS using the GSM 1900 frequency band that has all TRXs in the working (WO) state. During the BSC software installation, the system has created a SEG for each existing BTS. The number of the SEG is the same as the number of the related BTSs, for example BTS-12 => SEG-12.

2.1.1 Creating a BTS

Steps

1 Check the information about all the TRXs of the SEG (EEI).With the EEI MML command you get information about all the BTSs and TRXs of the SEG.

ZEEI:SEG=<seg_id>;

2 Create a BTS (GSM 800) to a segment that has one BTS using the GSM 1900 fre-quency band (EQC).

t Because the segment already exists, the MML does not allow you to define cell (seg-ment) specific parameters. Only BTS-specific parameters are allowed.

ZEQC:BCF=<bcf_id>,BTS=<bts_id>,SEG=<seg_id>:BAND=800;

3 Check the information about all TRXs of the SEG (EEI).ZEEI:SEG=<seg_id>;

Further information

Example:

1. ZEEI:SEG=44;SEG-44:BCF-044 ULTRA SITEBTS-044 (GSM 1900)TRX-001 (MBCCHC)TRX-002

2. ZEQC:BCF=44,BTS=77,SEG=44:BAND=800;

26 DN00273887




3. ZEEI:SEG=44;SEG-44:BCF-044 ULTRA SITEBTS-044 (GSM 1900)TRX-001 (MBCCHC)TRX-002BTS-077 (GSM 800)

2.1.2 Deleting the old BCCH channelDelete the BCCH channel from the BTS using the GSM 1900 frequency band.

Steps

1 Lock the BTS that uses the GSM 1900 frequency band (EQS).ZEQS:BTS=<bts_id>:L;

2 Lock the BCCH TRX (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:L;

3 Delete the BCCH channel of the BTS and change it to a TCH channel (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=TCHF;

Further information

Example:

1. ZEQS:BTS=44:L;2. ZERS:BTS=44,TRX=1:L;


2.1.3 Creating a TRX and the BCCH channelCreate a transceiver (TRX) for the new BTS using the GSM 800 frequency band. Create the BCCH channel.

Steps

1 Create the BCCH TRX (ERC).ZERC:BTS=<bts_id>,TRX=<trx_id>::FREQ=<freq>,TSC=<nbr>,PCMTSL=<pcm-tsl>:DNBR=<nbr>:CH0=MBCCHC;

2 Check the information about all the TRXs of the SEG (EEI).ZEEI:SEG=<seg_id>;

DN00273887 27




Further information

Example:

1. ZERC:BTS=77,TRX=3::FREQ=130,TSC=1,PCMTSL=40-1:DNBR=114:CH0=MBCCHC;

2. ZEEI:SEG=44;SEG-44:BCF-044 ULTRA SITEBTS-044 (GSM 1900)TRX-001TRX-002BTS-077 (GSM 800)TRX-003 (MBCCHC)

2.1.4 Modifying the MS txpwr max gsm (PMAX1) parameter for the new BTS using the GSM 800 band

PurposeSkip this procedure if the default value of the parameter PMAX1, that is, the maximum power level that an MS may use in the serving cell, is good enough.

Steps

1 Output the BTS parameters (EQO).ZEQO:SEG=<seg_id>:MIS;

2 Modify the PMAX1 parameter of the BTS (EQM).ZEQM:SEG=<seg_id>:PMAX1=<value>;

Further information

Example:

1. ZEQO:SEG=44:MIS;

2. ZEQM:SEG=44:PMAX1=35;

2.1.5 Defining the maximum transmission power for MS accessing the cell

PurposeThe maximum transmission power that an MS may use when accessing the BCCH or PCCCH of a cell in which the BCCH is on the GSM 800 frequency band is defined with the parameters MS txpwr max CCH (TXP1) and GPRS MS txpwr max CCH (GTXP1). The default value for both parameters is 33 dBm. You can skip this procedure if the default value is applicable for both parameters.


28 DN00273887




Steps

1 Modify the TXP1 and GTXP1 parameters of the segment (EQG).Modify the MS txpwr max CCH (TXP1) and GPRS MS txpwr Max CCH (GTXP1) parameters.

ZEQG:SEG=<seg_id>:TXP1=<value>,GTXP1=<value>;

Further information

Example: ZEQG:SEG=44:TXP1=35,GTXP1=31;

2.1.6 Modifying the power control parameters of the segment

PurposeSkip this procedure if the power control parameters of the BTS using the GSM 1900 band values are also applicable to the new BTS using the GSM 800 frequency band. Check that the GSM 800 / GSM 900 frequency band specific power control parameter BS TX pwr max (PMAX1) has an applicable value. If not, modify the power control parameters of the segment.

t If the segment has more than one BTS, you can modify the power control parameters only via segment identification. The new value is set for all the BTSs of the segment.

Steps

1 Output the power control parameters (EUO).ZEUO:SEG=<seg_id>;

2 Modify the power control parameters (EUG).Modify BS TX pwr max (PMAX1) parameter.

ZEUG:SEG=<seg_id>:PMAX1=<value>;

Further information

Example:

1. ZEUO:SEG=44;

2. ZEUG:SEG=44:PMAX1=10;

2.1.7 Modifying the early sending indication (ESI) parameter for the Common BCCH segment

PurposeThe value of the parameter ESI should be set to value Y in the Common BCCH segment. This value enables the BSC to receive the frequency capability information of the MS as quickly as possible. As a consequence, the resources of the non-BCCH fre-quency band of the segment can be used already in the call setup phase.

DN00273887 29




Steps

1 Output the SEG parameters (EQO).ZEQO:SEG=<seg_id>:ALL;

2 Modify the ESI parameter (EQM).ZEQM:SEG=<seg_id>:ESI=<value>;

Further information

Example:

1. ZEQO:SEG=44:ALL;

2. ZEQM:SEG=44:ESI=Y;

2.1.8 Defining the signal level difference with the parameter non BCCH layer offset (NBL)

PurposeDefine the signal level difference between a BTS without the BCCH TRX and the BCCH BTS of the segment.

Steps

1 Modify the value of the NBL parameter (EQM).Modify the value of the non BCCH layer offset (NBL) parameter. The default value when creating a BTS is 0 dBm.

ZEQM:BTS=<bts_id>:NBL=<value>;

Further information

Example: ZEQM:BTS=44:NBL=5;

t The parameters BS TX pwr max (PMAX1) and BS TX pwr max 1x00 (PMAX2) identify the maximum transmission power of the BTS as an attenuation from the peak power of the TRX. You have to take these parameters into account when defining the value for parameter non BCCH layer offset (NBL).

fGiving a positive value to the parameter non BCCH layer offset (NBL) prevents SDCCH allocation for call set-up and external handovers in the base transceiver station (BTS) in question. Always set the value of the parameter non BCCH layer offset to 0 in the BCCH BTS.

30 DN00273887




2.1.9 Defining the load limit for a BTS

PurposeDefine the load limit for a BTS with the parameter BTS load in SEG (LSEG).

You can determine separate LSEGs for all the BTSs of the segment. The parameter LSEG is used in controlling the load distribution between different BTSs in a segment. The default value when creating a BTS is 70%. If you want to change it, use the MML command EQM.

Steps

1 Modify the value of the BTS load in SEG parameter (EQM).ZEQM:BTS=<bts_id>:LSEG=<value>;

Further information

Example: ZEQM:BTS=77:LSEG=50;

2.1.10 Defining the threshold value for the estimated downlink signal level on the non-BCCH frequency layer

PurposeDefine the threshold value for a segment with the parameter non BCCH layer access threshold (LAR).

The parameter LAR is the threshold value for the estimated downlink signal level on the non-BCCH frequency layer of the segment for moving an MS from the BCCH frequency layer to the non-BCCH frequency layer. The default value is -90 dBm. If you want to change it, use the MML command EHS.

Steps

1 Modify the value of the non BCCH layer access threshold parameter (EHS).ZEHS:SEG=<seg_id>:LAR=<value>;

Further information

Example: ZEHS:SEG=44:LAR=–80;

In this activation example, the BCCH carrier is in a GSM 800 BTS. In the case where the BCCH carrier of the GSM 800 / GSM 1900 multi-band segment is in a GSM 1900 BTS, the non-BCCH layer access threshold parameter can be used to limit the access of the dual band GSM 800 / GSM 1900 MSS to the GSM 1900 BTS, which is regarded as a weaker layer in the segment, and direct the dual band MSS with weaker downlink signal levels to the GSM 800 BTS of the segment.

DN00273887 31




2.1.11 Defining the threshold value for handing over an MS from the non-BCCH frequency layer to the BCCH frequency layer

PurposeDefine the threshold for a segment with the following parameters:

• non BCCH layer exit threshold (LER) • non BCCH layer exit threshold px (LEP)

• non BCCH layer exit threshold nx (LEN)

LER is a threshold value for the measured downlink signal level on the non-BCCH fre-quency layer for handing over an MS from the non-BCCH frequency layer to the BCCH frequency layer. LEP and LEN can be used to define how many of the measurement reports must be below the LER to trigger the handover. The default value for LER is -95 dBm, the default value for LEP is 1, and the default value for LEN is 1. If you want to change the values you can use the MML command EHS.

A handover from the non-BCCH frequency layer to the BCCH frequency layer based on the non BCCH layer exit threshold (LER) parameter is applicable when the BCCH carrier is in the GSM 800 frequency layer that is expected to have more coverage than the GSM 1900 non-BCCH frequency layer of the segment. If the BCCH carrier of the GSM 800 / GSM 1900 multi-band segment is in a GSM 1900 BTS, the non-BCCH layer exit threshold is used to hand over traffic from the GSM 1900 frequency layer to the GSM 800 non-BCCH frequency layer of the segment.

Steps

1 Modify the non-BCCH layer exit threshold parameters (EHS).ZEHS:SEG=<seg_id>:LER=<value>,LEP=<value>,LEN=<value>;

Further information

Example: ZEHS:SEG=44:LER=–90,LEP=3,LEN=5;

2.1.12 Modifying the handover control parameters of the segment

PurposeSkip this procedure if the handover control parameters of the BTS using the GSM 1900 band values are applicable also to the new BTS using the GSM 800 frequency band. Otherwise, modify the handover control parameters of the segment.

t If the segment has more than one BTS, you can modify the handover control parameters only via segment identification. The new value is set for all the BTSs of the segment.

Steps

1 Output the handover control parameters (EHO).ZEHO:SEG=<seg_id>;

32 DN00273887




2 Modify the handover control parameters (EHG).Modify the enable SDCCH handover (ESD) parameter.

ZEHG:SEG=<seg_id>:ESD=Y;

Further information

Example:

1. ZEHO:SEG=44;

2. ZEHG:SEG=44:ESD=Y;

2.1.13 Creating adjacent cells

PurposeCreate more adjacent cells, if needed. You can create adjacent cells with the EAC MML command, but if the segment has more than one BTS, you have to use segment identi-fication as a parameter instead of BTS identification.

Steps

1 Create an adjacent cell for a segment that has more than one BTS and is under another BSC (EAC).ZEAC:SEG=<seg_id>::LAC=<nbr>,CI=<nbr>:NCC=<nbr>,BCC=<nbr>,FREQ=<nbr>;

2 Create an adjacent cell for a segment that has more than one BTS and is under the same BSC (EAC).ZEAC:SEG=<seg_id>::ASEG=<aseg_id>;

Further information

Example:

1. ZEAC:SEG=44::LAC=199,CI=39:NCC=1,BCC=1,FREQ=131;2. ZEAC:SEG=44::ASEG=99;

2.1.14 Deleting an adjacent cell of the segment

PurposeIn Common BCCH Control, the BSC adds the BCCH frequency of the serving segment among the BCCH frequencies that the MS should measure when on the non-BCCH fre-quency band of the multi-band segment. This leads to the following restriction: a segment can have only 31 adjacent cells.

If Inter-System Handover is used with Common BCCH Control, the maximum number of adjacent cells is restricted to 30.

Skip this procedure if the segment does not have 32 or 31 adjacent cells. Otherwise, remove one or two adjacent cells of the segment.

DN00273887 33




Steps

1 Delete the adjacent cell (EAD).ZEAD:SEG=<seg_id>::ASEG=<aseg_id>;

Further information

Example: ZEAD:SEG=44::ASEG=88;

2.1.15 Modifying the BA list <option>

PurposeIn Common BCCH Control, the BSC adds the BCCH frequency of the serving segment among the BCCH frequencies that the MS should measure when on the non-BCCH fre-quency band of the multi-band segment. This leads to the following restriction: there can be only 31 frequencies in a BCCH allocation list (BA list).

If Inter-System Handover is used with Common BCCH Control, the maximum number of frequencies in a BA list is restricted to 30.

Skip this procedure if the BA list is not used or if the BA list does not have 32 or 31 BCCH frequencies. Otherwise, remove one or two BCCH frequencies from the BA list.

Steps

1 Output the BA list usage parameters (EQO).ZEQO:SEG=<seg_id>:BCC;

2 Remove one BCCH frequency from the BA list (EBM).ZEBM:<id_nbr>,<function>:<freq>;

Further information

Example:

1. ZEQO:SEG=44:BCC;2. ZEBM:15,R:140;

2.1.16 Creating a BA list and attaching it to a segment <option>

PurposeSkip this procedure if BA lists are not used.

Steps

1 Create a BA list (EBC).

t If the BA list is going to be used for a segment which has more than one frequency band in use, the type (frequency band) of the BA list must be MULTI.

34 DN00273887




ZEBC:<id_nbr>,MULTI:<frequency>&<frequency>&<frequency>;

2 Attach the BA list to the segment (EQB).ZEQB:SEG=<seg_id>:IDLE=<ba_id>;

Further information

Example:

1. ZEBC:10,MULTI:150&160&170;2. ZEQB:SEG=44:IDLE=10;



Steps

1 Unlock the BCCH TRX (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

2 Unlock the BTS that contains the BCCH TRX (EQS).ZEQS:BTS=<bts_id>:U;

3 Unlock the TRXs of the BTS using the GSM 1900 frequency band (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

ZERS:BTS=<bts_id>,TRX=<trx_id>:U;


5 Unlock the BCF (EFS).ZEFS:<bcf_id>:U;

Further information

Example:


2. ZEQS:BTS=77:U;

3. ZERS:BTS=44,TRX=1:U;ZERS:BTS=44,TRX=2:U;

4. ZEQS:BTS=44:U;

DN00273887 35




5. ZEFS:44:U;

2.1.18 Checking postcondition

PurposeAfter unlocking, all TRXs of the segment are in the WO state. A call should be possible via both BTSs. Synchronised handovers are used between the BTSs as default.

Steps

1 Get information about all TRXs of the SEG (EEI).ZEEI:SEG=<seg_id>;

Further information

Example: ZEEI:SEG=44;

2.2 Cancelling the expansion of the segmentPurposeYou can move either the BTS using the GSM 800 frequency band or the BTS using the GSM 1900 frequency band to a new, separate segment. If you want to move the BTS which has the BCCH TRX, you must first delete the BCCH channel, because moving a BTS containing a BCCH TRX is not allowed. All the BTSs of the old segment must be in the locked state.

2.2.1 Locking the segment's BTSs and deleting its BCCH channel

Steps

1 Lock both BTSs and the BCCH TRX (EQS, ERS).ZEQS:BTS=<bts_id>:L;


ZERS:BTS=<bts_id>,TRX=<trx_id>:L;

2 Delete the BCCH channel and change it to a TCH channel (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=TCHF;

Further information

Example:

1. ZEQS:BTS=44:L;ZEQS:BTS=77:L;ZERS:BTS=77,TRX=3:L;


36 DN00273887




2.2.2 Moving the BTS using the GSM 800 frequency band to its own segment

Steps

1 Move the BTS to a new segment (EQU).ZEQU:BTS=<bts_id>:SEG=<seg_id>:CI=<nbr>:NCC=<nbr>,BCC=<nbr>:MCC=<nbr>,MNC=<nbr>,LAC=<nbr>;

Further information

Example: Move the base station BTS-77 to the segment SEG-88. Segment-specific parameters must be defined for the new segment.

ZEQU:BTS=77:SEG=88:CI=5:NCC=1,BCC=1:MCC=1,MNC=1,LAC=15;

2.2.3 Defining a BCCH TRX for the BTSs using the GSM 1900 and GSM 800 frequency bands

Steps

1 Lock a TRX of the BTS using the GSM 1900 frequency band (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:L;

2 Define the BCCH channel to the TRX of the BTS using the GSM 1900 frequency band (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=MBCCHC;

3 Define the BCCH channel to a TRX of the BTS using the GSM 800 frequency band (ERM).ZERM:BTS=<bts_id>,TRX=<trx_id>:CH0=MBCCHC;

Further information

Example:

1. ZERS:BTS=44,TRX=1:L;



2.2.4 Defining the maximum transmission power for an MS accessing the cell for both segments

PurposeThe maximum transmission power that an MS may use when accessing the BCCH or PCCCH of a cell in which the BCCH is on the GSM 1900 frequency band is defined with

DN00273887 37




the parameters MS txpwr max CCH 1x00 (TXP2) and GPRS MS TX pwr max CCH1x00 (GTXP2). The default value for both parameters is 30 dBm.

The maximum transmission power that an MS may use when accessing the BCCH or PCCCH of a cell in which the BCCH is on the GSM 800 frequency band is defined with the parameters MS txpwr max CCH (TXP1) and GPRS MS TX pwr max CCH (GTXP1). The default value for both parameters is 33 dBm.

You can skip this procedure if the default values are applicable for both segments.


Steps



Further information

Example:



2.2.5 Defining the HOC, POC, and ADJ parameters for the moved BTS

PurposeModify the power control parameter values and handover control values. Create adjacent cells for the BTS that was moved. The power control, handover control, and any adjacencies do not follow the moved BTS to the new segment.You have to define the POC, HOC, and any adjacencies needed for the new segment as in BTS creation.

You can now modify the power control and handover control parameters via segment identification or via BTS identification, because the segment with the moved BTS has only one BTS.

Steps

1 Create power control parameters (EUC).Create power control parameters for the new segment by using either the SEG or the BTS identifier.

ZEUC:SEG=<seg_id>;

or

ZEUC:BTS=<bts_id>;

38 DN00273887




2 Create handover control parameters (EHC).Create handover control parameters for the new segment by using either the SEG or the BTS identifier.

ZEHC:SEG=<seg_id>;

or

ZEHC:BTS=<bts_id>;

3 Create an adjacent cell (EAC).Create an adjacent cell for the new segment. The adjacent cell is under the same BSC. You can use either the SEG or the BTS identifier.

ZEAC:SEG=<seg_id>::ABTS=<bts_id>;

or

ZEAC:BTS=<bts_id>::ABTS=<bts_id>;

Further information

Example:

1. ZEUC:SEG=88;orZEUC:BTS=77;

2. ZEHC:SEG=88;orZEHC:BTS=77;

3. Create adjacent cell BTS-44 for SEG-88.ZEAC:SEG=88::ABTS=44;orZEAC:BTS=77::ABTS=44;



Steps

1 Unlock the BCCH TRX of the BTS that was moved (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;

2 Unlock the BTS that was moved (EQS).ZEQS:BTS=<bts_id>:U;

DN00273887 39




3 Unlock the BCCH TRX of the BTS using the GSM 1900 frequency band (ERS).ZERS:BTS=<bts_id>,TRX=<trx_id>:U;


Further information

Example:


2. ZEQS:BTS=77:U;

3. ZERS:BTS=44,TRX=1:U;4. ZEQS:BTS=44:U;

2.3 Moving a BTS from one segment to another existing segmentPurposeWhen you move a BTS from the old segment to another existing segment, all the BTSs in the old segment and in the new segment must be in the locked state. Moving a BTS containing the BCCH TRX is not allowed. The BTS that was moved starts to use the new segment's parameters. After moving the BTS, you must unlock all the BTSs of the old and the new segment.

You can combine two segments in a similar way by moving all the BTSs of one segment to another existing segment. After you have moved the BTSs, the old segment does not exist any more.

t Note that when moving a BTS from one segment to another, GPRS has to be disabled in all the BTSs in both segments.

2.3.1 Locking all the BTSs in the old and the new segment

Steps

1 Get information about all the BTSs and TRXs of both segments (EEI).ZEEI:SEG=<seg_id>;

ZEEI:SEG=<seg_id>;

2 Lock all the BTSs of the old segment (EQS).ZEQS:BTS=<bts_id>:L;


3 Lock all the BTSs of the new segment (EQS).ZEQS:BTS=<bts_id>:L;

40 DN00273887




Further information

Example:

1. ZEEI:SEG=33;SEG-33:BCF-033 ULTRA SITEBTS-033 (GSM 800)TRX-001 (MBCCHC)TRX-002BTS-55 (GSM 800)TRX-3

ZEEI:SEG=66;SEG-66:BCF-066 ULTRA SITEBTS-066 (GSM 800)TRX-001 (MBCCHC)TRX-002

2. ZEQS:BTS=33:L;ZEQS:BTS=55:L;

3. ZEQS:BTS=66:L;

2.3.2 Moving the BTS from the old segment to a new existing segment

Steps

1 Move the BTS (EQU).ZEQU:BTS=<bts_id>:SEG=<seg_id>;

Further information

Example: Move the BTS-55 to the new existing segment SEG-66.

ZEQU:BTS=55:SEG=66;

2.3.3 Unlocking all the BTSs in the old and the new segment

Steps

1 Unlock the BTS of the old segment (EQS).ZEQS:BTS=<bts_id>:U;

2 Unlock all the BTSs of the new segment (EQS).You must first unlock the BTS that has the BCCH TRX.



DN00273887 41




3 Get information about all BTSs and TRXs of both segments (EEI).ZEEI:SEG=<seg_id>;

ZEEI:SEG=<seg_id>;

Further information

Example:

1. ZEQS:BTS=33:U;

2. ZEQS:BTS=66:U;ZEQS:BTS=55:U;

3. ZEEI:SEG=33;SEG-33:BCF-033 ULTRA SITEBTS-033 (GSM 800)TRX-001 (MBCCHC)TRX-002

ZEEI:SEG=66;SEG-66:BCF-066 ULTRA SITEBTS-066 (GSM 800)TRX-001 (MBCCHC)TRX-002BTS-55 (GSM 800)TRX-3

42 DN00273887


Id:0900d8058059c0e0Confidential

Testing Common BCCH Control for GSM 900 / GSM 1800 and Common BCCH Control for GSM 800 / GSM

3 Testing Common BCCH Control for GSM 900 / GSM 1800 and Common BCCH Control for GSM 800 / GSM 1900 PurposeThis is a basic test to check that the activation procedure has been successful.

In a test network you can test Common BCCH Control by setting up a call between two mobile stations that have both camped on a multi-band segment that has a BTS using one frequency band (BCCH BTS) and a BTS using another frequency band. You can test Common BCCH Control by setting up a call between two MSS in a multi-band segment. Make sure that the mobile stations are both well within the coverage area of the non-BCCH frequency band BTS of the segment. The basic idea of the test is to verify that the mobile stations can also be directed to the channels of the BTS that has no BCCH.

For activation instructions, see Activating Common BCCH Control for GSM 900 / GSM 1800 and Activating Common BCCH Control for GSM 800 / GSM 1900 under Test and activate/Radio network performance in the PDF view.

For a description of Common BCCH Control, see Common BCCH Control in BSC under Feature descriptions/Radio network performance in the PDF view.

Before you startMake sure you have the following equipment available:

• 1 BSC • 2 BTSs. A BTS (that has the BCCH TRX) using one frequency band and a BTS (that

has a TRX) using another frequency band. • 2 MSS

Test network needed:

• SEG-44 • BCF-44 • BTS-44 (non BCCH frequency band) • TRX-1 (8 full rate (TCHF) TSLs) • BTS-77 (BCCH frequency band) • TRX-3 (MBCCHC +7 full rate (TCHF) TSLs)

t Use the MML command ERO to verify the TRX from which the TCH is allocated.

Steps

1 Set up a call.Set up a call between the two terminals in SEG-44.

DN00273887 43


Testing Common BCCH Control for GSM 900 / GSM1800 and Common BCCH Control for GSM 800 / GSM

Id:0900d8058059c0e0Confidential

2 Check the TCH channel (ERO).Check that a TCH channel has been allocated for the call, both in the BTS using the BCCH frequency band and in the BTS using the non-BCCH frequency band. Use the commands ZERO:BTS=77; and ZERO:BTS=44;

3 Terminate the call.

Expected outcomeThe activation procedure of Common BCCH Control has been successful if the BSC allocates the TCH channels from both the BTS using the BCCH frequency band and from the BTS using the non-BCCH frequency band in the same segment.

Date post:	25-Dec-2015
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Activating and Testing BSS10016 and BSS10118: Common BCCH Control for GSM

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