Nokia Siemens Networks GSM/EDGE BSS, rel. RG10(BSS), operating documentation, issue 06

Activate

Activating and Testing BSS20494: Space Time Interference Rejection Combining

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Issue 2-0Approval Date 19/03/2008 00:00:00

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The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation. This documentation is intended for the use of Nokia Siemens Networks customers only for the purposes of the agreement under which the document is submitted, and no part of it may be used, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Siemens Networks. The documentation has been prepared to be used by professional and properly trained personnel, and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomes customer comments as part of the process of continuous development and improvement of the documentation.

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f Important Notice on Product Safety Elevated voltages are inevitably present at specific points in this electrical equipment. Some of the parts may also have elevated operating temperatures.

Non-observance of these conditions and the safety instructions can result in personal injury or in property damage.

Therefore, only trained and qualified personnel may install and maintain the system.

The system complies with the standard EN 60950 / IEC 60950. All equipment connected has to comply with the applicable safety standards.

The same text in German:

Wichtiger Hinweis zur Produktsicherheit

In elektrischen Anlagen stehen zwangsläufig bestimmte Teile der Geräte unter Span-nung. Einige Teile können auch eine hohe Betriebstemperatur aufweisen.

Eine Nichtbeachtung dieser Situation und der Warnungshinweise kann zu Körperverlet-zungen und Sachschäden führen.

Deshalb wird vorausgesetzt, dass nur geschultes und qualifiziertes Personal die Anlagen installiert und wartet.

Das System entspricht den Anforderungen der EN 60950 / IEC 60950. Angeschlossene Geräte müssen die zutreffenden Sicherheitsbestimmungen erfüllen.

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Table of ContentsThis document has 8 pages.

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

1 Activating Space Time Interference Rejection Combining. . . . . . . . . . . . 6

2 Deactivating Space Time Interference Rejection Combining. . . . . . . . . . 8

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Summary of changes

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

Changes made between issues 2-0 and 1–1The STIRC feature number in the title of the document has been changed to correspond to the BSC licensing guidelines.

The alarm information has been updated in chapter Activating Space Time Interference Rejection Combining.

Changes made between issues 1–1 and 1–0Used terminology has been updated.

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Activating Space Time Interference Rejection Combin-ing

1 Activating Space Time Interference Rejection CombiningSpace Time Interference Rejection Combining (STIRC) is an enhancement to Interfer-ence Rejection Combining (IRC) that is implemented in UltraSite, MetroSite, and Flexi EDGE BTSs. STIRC enhances the uplink performance by improving the interference rejection capability of the BTS.

STIRC is a licence-based application software product. Its use is controlled by a capacity licence, based on the number of STIRC-activated TRXs in the BSC. When STIRC is activated in a BTS object, it replaces IRC in all TRXs in the BTS object. All TRXs in a STIRC enabled BTS object must be STIRC-cabable.

For a description of STIRC, see Space Time Interference Rejection Combining System Feature Description under Feature descriptions/Radio network performance in the PDF view.

Before you startMake sure that the following are in order before you activate STIRC:

• The STIRC licence is installed. • The feature state of STIRC is ON. • The used BTS site type is UltraSite BTS with software release CX5 or later, Met-

roSite BTS with software release CXM5 or later, or Flexi EDGE BTS with software release EP1.1 or later.

• All TRXs in STRIC-enabled BTS object support STIRC.

You can activate STIRC on a Flexi EDGE BTS or an EDGE-capable UltraSite or Met-roSite BTS. You can also activate STIRC on an UltraSite BTS with TRXs that use the BB2E/BB2F EDGE baseband board with a non-EDGE RFU (TSxA) unit.

Steps

1 Check the hardware state of the BTS (EEI).ZEEI:BTS=<bts_id>;

In a MetroSite BTS, all TRXs must be EDGE TRXs for a STIRC enabled sector.

In a UltraSite BTS, EDGE TRXs and TRXs with BB2E/BB2F baseband board and non-EDGE RFU (TSxA) unit support STIRC. TRXs with BB2A baseband board and non-EDGE RFU (TSxA) unit do not support STIRC. You can check the hardware of the BTS from the hardware database using BTS MMI.

2 Check that the licence that covers STIRC has been installed (W7I).ZW7I:LIC,FULL:LIC=<licence code>;

For instructions on installing licences, see Licensing in BSC under Install and Upgrade/Software in the PDF view.

3 Check the value of the STIRC feature state (W7I).ZW7I:FEA,FULL:FEA=393;

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4 If necessary, change the STIRC feature state to ON.ZW7M:FEA=393:ON;

5 Check that the STIRC feature state change succeeded (W7I).ZW7I:FEA,FULL:FEA=393;

6 Change the value of the STIRC enabled parameter of the STIRC-enabled BTS object to Y (EQM).ZEQM:BTS=<bts_id>:STIRC=Y;

7 Check that the value change succeeded (EQO).ZEQO:BTS=<bts_id>:MIS;

If you enable STIRC before the BCF/BTS object is unlocked, and all unlocked TRXs are not STIRC capable, alarm 7606 is raised and the TRX is set to blocked (BL) state.

Expected outcomeThe value of the STIRC enabled parameter is Y and alarm 7606 is not active.

Unexpected outcomeAlarm 7606 with fault reason "Non EDGE TRX device type used accidentally in EDGE capable mode" is set active and the TRX is set to blocked (BL) state. To proceed, do the following:

1. Deactivate STIRC in the BTS.

2. Check that the BTS hardware supports STIRC.

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Deactivating Space Time Interference Rejection Com-bining

2 Deactivating Space Time Interference Rejec-tion CombiningWhen Space Time Interference Rejection Combining (STIRC) is deactivated, Interfer-ence Rejection Combining (IRC) replaces STIRC in all TRXs in the BTS object.

For a description of STIRC, see Space Time Interference Rejection Combining System Feature Description under Feature descriptions/Radio network performance in the PDF view.

Steps

1 Change the value of the STIRC enabled parameter of the BTS object to N (EQM).ZEQM:BTS=<bts_id>:STIRC=N;

2 Check that the value change succeeded (EQO).ZEQO:BTS=<bts_id>:MIS;

3 Change the feature state to OFF (W7M).ZW7M:FEA=393:OFF;

Expected outcomeSTIRC is deactivated. The STIRC enabled parameter is no longer available.