Activating STIRC

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Activating and Testing BSS20494:

Space Time Interference Rejection

Combining

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# Nokia Siemens Networks 1 (13)

BSC3153

Nokia GSM/EDGE BSS, Rel. BSS13, BSC and

TCSM, Rel. S13, Product Documentation, v.1



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

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Rejection Combining



Contents

Contents 3

List of tables 4

List of figures 5

Summary of changes 7

1 Activating Space Time Interference Rejection Combining 9

2 Deactivating Space Time Interference Rejection Combining 13

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List of tables


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List of figures

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List of figures




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Summary of changes

Changes 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 –1

The 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 –

0

Used terminology has been updated.

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Summary of changes





1 Activating Space Time Interference

Rejection Combining

Space Time Interference Rejection Combining (STIRC) is anenhancement to Interference Rejection Combining (IRC) that is

implemented in Nokia 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 start

Make 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 Nokia UltraSite BTS with software release

CX5 or later, Nokia MetroSite BTS with software release CXM5 or

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

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

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You can activate STIRC on a Flexi EDGE BTS or an EDGE-capable

UltraSite or MetroSite BTS. You can also activate STIRC on an UltraSiteBTS 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 Nokia MetroSite BTS, all TRXs must be EDGE TRXs for a

STIRC enabled sector.

In a Nokia 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;

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 theSTIRC-enabled BTS object to Y (EQM).

ZEQM:BTS=<bts_id>:STIRC=Y;

7. Check that the value change succeeded (EQO).


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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 outcome

The value of the STIRC enabled parameter is Y and alarm 7606 is not

active.

Unexpected outcome

Alarm 7606 with fault reason "Non EDGE TRX device type usedaccidentally 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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2 Deactivating Space Time Interference

Rejection Combining

When Space Time Interference Rejection Combining (STIRC) isdeactivated, Interference 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 outcome

STIRC is deactivated. The STIRC enabled parameter is no longer

available.

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Documents

Activating STIRC