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# Ericsson CSSR Formula

Viewing 12 posts - 16 through 27 (of 27 total)
• Author
Posts
• #54348
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)

#54349
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.

#54350
Iwans
Guest

Hi Pak Mucky,

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

#54351
Cha1
Guest

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

#54352
kashif
Guest

what is the huawei cssr formulae?

#54353
GOWTHAMAN.P
Guest

WAT IS MEANT BY CSSR AND DCR?

#54354
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)

#54355
waqas
Guest

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

#54356
Ibrahima
Guest

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

#54357
chris
Guest

Hello

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

#54358
Bijoy
Guest

Hi Chris
Could you pls specify the vendor.

Br\\
Bijoy

#102842
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