Home » Topics » Telecom Design » Ericsson CSSR Formula

AliAsgher Guest

It is recommended to calculate CSSR from Drive Test. Although for Ericsson systems the recommended CSSR formula is

CSSR = 100 * ([TCASSALL + TFCASSALLSUB + THCASSALL + THCASSALLSUB]/ TASSALL) * (1 – ([RAOREQ + RAAPAG + RACALRE]/CNROCNT) * (CCALLS-CMSESTAB)/CCALLS) * (1 – ([RAOREQ + RAAPAG + RACALRE]/CNROCNT)* (CNDROP – CNRELCONG)/CMSESTAB)

Hence it can be explained as

CSSR = TCH Assignment * (1-SD Establishment for TCH Calls) * (1-SD Drops for TCH Calls)

Mucky Guest

CSSR is standard to measure any call attempt which can be sucessfully be a call setup. CSSR is formula that usually used for DT KPI.

Iwans Guest

Hi Pak Mucky,

CMIIW
CSSR one of item in kpi which is belong to SD_DROP & SD_BLOCK

Cha1 Guest

What are the reasons for low Originating call setup Success Rate (Low originating CSSR) in CDMA

kashif Guest

what is the huawei cssr formulae?

GOWTHAMAN.P Guest

WAT IS MEANT BY CSSR AND DCR?

Thavam Guest

I want to know the expansion for the terms mentioned in following formula.
CSSR = 100 * ([TCASSALL + TFCASSALLSUB + THCASSALL + THCASSALLSUB]/ TASSALL) * (1 – ([RAOREQ + RAAPAG + RACALRE]/CNROCNT) * (CCALLS-CMSESTAB)/CCALLS) * (1 – ([RAOREQ + RAAPAG + RACALRE]/CNROCNT)* (CNDROP – CNRELCONG)/CMSESTAB)

waqas Guest

CSSR stands for call set up success rate……it is one of the KPI’s used for measuring the performance of network

Ibrahima Guest

What is the process ? can you give me one example please ?

chris Guest

Hello

Need a Favor please

Any idea about the 2 Below KPI

– Average uplink CE congestion rate
– Power Congestion
• Which input to use
• Any Measurement Protocol
• Minimum Level
• Formula to use

Many Thanks
Chris

Bijoy Guest

Hi Chris
Could you pls specify the vendor.

Br\\
Bijoy

mohammed Guest

Hi,

The below formula is it correct to calculate CSSR from MSS level
CSSR= ( MO Assignment Success Times (times)+MT Assignment Success Times (times))/(MT Paging Response Times (times)+MO CM Service Request Times (times))*100

Your comment is highly appreciated

The forum ‘Telecom Design’ is closed to new topics and replies.