- This topic has 9 replies, 1 voice, and was last updated 3 years, 8 months ago by CAM CHARLY.
12th March 2010 at 07:16 #61420MohitGuest
Can anybody explain the diff. between CSSR & CSR.
Thnxs in advance..
Mohit12th March 2010 at 08:51 #61421MohitGuest
Help me also, I know u can…
Mohit12th March 2010 at 12:42 #61422pixGuest
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.
pix12th March 2010 at 13:30 #61423ATTOGuest
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.17th March 2010 at 09:16 #61424MohitGuest
Many thnx to both of you.
Mohit20th November 2010 at 20:25 #61425ADEELGuest
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…8th December 2010 at 10:14 #61426Too Fresh OptimizerGuest
If 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 advance8th December 2010 at 10:46 #61427pixGuest
check the cause of bad cssr:
sd drops ?
tch congestion ?
tch assign failures ?
sd assign failures ?
cheers8th December 2010 at 11:42 #61428Too Fresh OptimizerGuest
Thnx pix for ur concern
we have a high sd drop
thnx15th October 2018 at 09:28 #61429CAM CHARLYGuest
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
nb of call attempt= 1000
call fail = 20
your cssr will be =((1000-20)/1000)*100
CSR is call success rate
it is CSSR- call drop