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Diffrence b/w CSSR & CSR ??

CAM CHARLY - 15th October 2018  (09:28 GMT)

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 = 20

your cssr will be =((1000-20)/1000)*100
= 98%

CSR is call success rate

it is CSSR- call drop

Too Fresh Optimizer - 8th December 2010  (11:42 GMT)

Thnx pix for ur concern


we have a high sd drop

thnx

pix - 8th December 2010  (10:46 GMT)

hi,

check the cause of bad cssr:
sd drops ?
tch congestion ?
tch assign failures ?
sd assign failures ?

cheers

Too Fresh Optimizer - 8th December 2010  (10:14 GMT)

Dear All
Dear Pix

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 advance

ADEEL - 20th November 2010  (20:25 GMT)

HI 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...

Mohit - 17th March 2010  (09:16 GMT)

Many thnx to both of you.

Regards,
Mohit

ATTO - 12th March 2010  (13:30 GMT)

Hello ,

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.

pix - 12th March 2010  (12:42 GMT)

Mohit,

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
pix

Mohit - 12th March 2010  (08:51 GMT)

Hi Pix,

Help me also, I know u can...

Regards,
Mohit

Mohit - 12th March 2010  (07:16 GMT)

Hi All,

Can anybody explain the diff. between CSSR & CSR.

Thnxs in advance..


Regards,
Mohit

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