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Hi All,
Can anybody explain the diff. between CSSR & CSR.
Thnxs in advance..
Regards,
MohitHi Pix,
Help me also, I know u can…
Regards,
MohitMohit,
Just have a look at the indicator formula…
CSSR = (1 – TCH ASSIGN UNSUCCESS RATE) * (1 – SDCCH DROP RATE)
CSR = (1 – CALL DROP RATE) * CSSR
For example :
CSSR = 95%
CDR = 10%Therefore the CSR = 90% * 95% = 85.5%
The CSR is just a mega-KPI, aggregating CSSR and CDR within one indicator. Useless for troubleshooting, but nice for management reporting.
Cheers
pixHello ,
In other terms the CSSR is the percentage of calls successfully established ( set up ) and CSR ( Call success rate) is the rate of calls going until normal release.
Regards.
Many thnx to both of you.
Regards,
MohitHI MOHIT,
Bro conceptually its very simple..as the name suggests , CSSR , is only about the call setup success…which means if the traffic channel assignment is done ,regardless of whether the call is dropped later on through an abnormal release(none or just one of the two user entities completing the release), it is considered a setup success…the reference here is obviously , total number of calls made by the user…
However , CSR ,tells us the percentage of calls that follow a normal release (both user entities completing the release or other normal causes such as release iniated by IN through the msc , when balance ends…)..the reference here is again the total number of calls made by the user..thats y its always aggregated with the CSSR value…
we always get,CSSR>CSR REALISTICALLY…Dear All
Dear PixIf we have some cells with very low CSSR , how can we optimize them ??
i mean which parameters we have to check and wat is the solution ?Thanks in advance
hi,
check the cause of bad cssr:
sd drops ?
tch congestion ?
tch assign failures ?
sd assign failures ?cheers
Thnx pix for ur concern
we have a high sd drop
thnx
the difference between CSSR & CSR is that;
CSSR call setup success rate is the rate of total call setup attempt you remove call fail divide by total call setup attemp *100
the basic formulat is
CSSR= ((Nb of call attempt- call fail)/ Nb of call)*100
for exemple
you have
nb of call attempt= 1000
call fail = 20your cssr will be =((1000-20)/1000)*100
= 98%CSR is call success rate
it is CSSR- call drop
