RF Optimization Tips_ WCDMA CSSR Optimization Tips

8/18/2019 RF Optimization Tips_ WCDMA CSSR Optimization Tips

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overlap to make your CSSR is good and no handle unnecessary traffic and make nodeB

handle traffic heavily.

- Activate EFD(Enhanced Fast Dormancy) Feature

When fast dormancy, enhanced fast dormancy, or standard fast dormancy is applied, the UE

can request the RNC to release the PS signaling connection if no more PS data is being

transmitted. Upon receiving such a request, the RNC can either release the signaling

connection and put the UE into idle mode, or maintain the signaling connection and put the

UE through Cell_FACH to CELL/URA_PCH state to reduce battery consumption. The

descriptions about fast dormancy, enhanced fast dormancy, and standard fast dormancy areas follows:

- With fast dormancy, after receiving a Signaling Connection Release Indication (SCRI)

message from a UE, the RNC releases the UE RRC connection regardless of whether the

message contains the cause value "UE Requested PS Data session end."

- With enhanced fast dormancy, UEs send SCRI messages that do not contain the cause

value "UE

Requested PS Data session end" to the RNC. After receiving such an SCRI message, the

RNC moves

the UE through Cell_FACH to CELL/URA_PCH state.

- Standard fast dormancy is applicable to fast dormancy UEs that comply with 3GPP

Release 8 (R8 for short). With standard fast dormancy, UEs send SCRI messages thatcontain the cause value "UE

Requested PS Data session end" to the RNC. After receiving such an SCRI message, the

RNC moves

the UE through Cell_FACH to CELL/URA_PCH state. Standard fast dormancy is valid only

when theRNC has enabled the timer T323 in system information block type 1 (SIB1). You can

refer to the document on your vendor to activate EFD feature.

- Adjust CPICH Power Setting

You can adjust CPICH Power setting to reduce coverage and improve your CSSR Ex:

Change PCPICHPOWER from 330 to 300.

- Adjust Parameter QQUQALMIN

You can adjust QQUALMIN to improve CSSR and avoid congestion on blocking resourcesespecially during event with potential to increasing traffic. Example: Change Qqualmin from

-18 to -15 to avoid congestion.

You might also Need to know:

- How to Optimize Handover Success Rate in GSM Network

- CSSR Optimization for GSM

- Drop Call Rate Optimization in GSM and UMTS

- Power Control activation for Electricity Saving in Huawei GSM

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