CSSR formula

[roots]

Dears

Could anyone share a CSSR formula (per BSC) in Huawei BSC 6000 system

the formula should contain the following indicators:

Call Setup Success Rate= TCH assignment success rate* Immediate assignment success rate * (1 - SD drop rate)


Thank you
BR

[RF engineer]

Dears

Could anyone share a CSSR formula (per BSC) in Huawei BSC 6000 system

the formula should contain the following indicators:

Call Setup Success Rate= TCH assignment success rate* Immediate assignment success rate * (1 - SD drop rate)


Thank you
BR

It is the same formula huawei using now.

BR

[roots]

Thank you for your reply RF engineer
Can you tell me which of those two formulas is the more adequate for calculating the Immediate assignment:

Formula 1 :
100* ([ZK3101:Immediate Assignment Commands per BSC]/[ZCA300J:Immediate Assignment Requests per BSC])

Formula 2 :

100*([ZCA303J:Call Setup Indications per BSC (CS Service)]/[ZCA300J:Immediate Assignment Requests per BSC])


Thank you

[dacoder]

For immediate assignment success rate we are using this:

Immediate Assignment Success rate={(CA303J: CELL_IMM_ASS_SUCC
/CA301J: CELL_IMM_ASS_CMD_CIRCUIT)}


and for CSSR following:



CSSR={(CA313: CELL_ASS_SUCC)/(CA310: CELL_ASS_REQ)}*{(CA303J: CELL_IMM_ASS_SUCC) /(CA301J: CELL_IMM_ASS_CMD_CIRCUIT)}*[1-{(CM30C:CELL_SD_CALL_DROPS_CALL)/(K3003A:CELL_SD_SUCC_CALL)}]*{100}


Thanks

[RF engineer]

Thank you for your reply RF engineer
Can you tell me which of those two formulas is the more adequate for calculating the Immediate assignment:

Formula 1 :
100* ([ZK3101:Immediate Assignment Commands per BSC]/[ZCA300J:Immediate Assignment Requests per BSC])

Formula 2 :

100*([ZCA303J:Call Setup Indications per BSC (CS Service)]/[ZCA300J:Immediate Assignment Requests per BSC])


Thank you

Dear

It is depend because if you see the signalling the second formula calculate until BSC recieve Establishment indication but first formula not include this one.


SO in case if you have problem in Um interface the second one will be less that first one.

BR

[roots]

For immediate assignment success rate we are using this:

Immediate Assignment Success rate={(CA303J: CELL_IMM_ASS_SUCC
/CA301J: CELL_IMM_ASS_CMD_CIRCUIT)}


and for CSSR following:



CSSR={(CA313: CELL_ASS_SUCC)/(CA310: CELL_ASS_REQ)}*{(CA303J: CELL_IMM_ASS_SUCC) /(CA301J: CELL_IMM_ASS_CMD_CIRCUIT)}*[1-{(CM30C:CELL_SD_CALL_DROPS_CALL)/(K3003A:CELL_SD_SUCC_CALL)}]*{100}


Thanks

Thanks dacoder, I think this formula is for CSSR per cell, what about CSSR per BSC please ?

BR