Huawei CSSR data Formula

Hi all,

Vendor Huawei.
I'm looking for a right CSSR data (PS) [Uplink TBF establishment success rate] for huawei Vendor (GSM). I tried many formulas..
The problem is to define when the establishment procedure ends !!
my last formula is :
CSSR_data = ([A9401:Number of 8-Bit Packet Channel Requests Received on CCCH]+[A9404:Number of 11-Bit Packet Channel Requests Received on CCCH]+[A9408:Number of Packet Channel Requests Received on PCCCH]+[A9411:Number of Resource Requests Received on Downlink PACCH]-([A9003:Number of Failed Uplink GPRS TBF Establishments due to No Channel]+[A9203:Number of Failed Uplink EGPRS TBF Establishments due to No Channel]+[A9004:Number of Failed Uplink GPRS TBF Establishments due to MS No Response]+[A9204:Number of Failed Uplink EGPRS TBF Establishments due to MS No Response]+A9016:Number of Failed Uplink GPRS TBF Establishments due to Other Cause+A9216:Number of Failed Uplink EGPRS TBF Establishments due to Other Cause))/([A9401:Number of 8-Bit Packet Channel Requests Received on CCCH]+[A9404:Number of 11-Bit Packet Channel Requests Received on CCCH]+[A9408:Number of Packet Channel Requests Received on PCCCH]+[A9411:Number of Resource Requests Received on Downlink PACCH])([A9401:Number of 8-Bit Packet Channel Requests Received on CCCH]+[A9404:Number of 11-Bit Packet Channel Requests Received on CCCH]+[A9408:Number of Packet Channel Requests Received on PCCCH]+[A9411:Number of Resource Requests Received on Downlink PACCH]-([A9003:Number of Failed Uplink GPRS TBF Establishments due to No Channel]+[A9203:Number of Failed Uplink EGPRS TBF Establishments due to No Channel]+[A9004:Number of Failed Uplink GPRS TBF Establishments due to MS No Response]+[A9204:Number of Failed Uplink EGPRS TBF Establishments due to MS No Response]+A9016:Number of Failed Uplink GPRS TBF Establishments due to Other Cause+A9216:Number of Failed Uplink EGPRS TBF Establishments due to Other Cause))/([A9401:Number of 8-Bit Packet Channel Requests Received on CCCH]+[A9404:Number of 11-Bit Packet Channel Requests Received on CCCH]+[A9408:Number of Packet Channel Requests Received on PCCCH]+[A9411:Number of Resource Requests Received on Downlink PACCH])

Thank's for help

Hi Bro

DL TBF assignment success rate: [A9302:Number of Successful Downlink EGPRS TBF Establishments+A9102:Number of Successful Downlink GPRS TBF Establishments]/[A9301:Number of Downlink EGPRS TBF Establishment Attempts+A9101:Number of Downlink GPRS TBF Establishment Attempts]

UL TBF Assignment success rate: [A9002:Number of Successful Uplink GPRS TBF Establishments+A9202:Number of Successful Uplink EGPRS TBF Establishments]/[A9001:Number of Uplink GPRS TBF Establishment Attempts+A9201:Number of Uplink EGPRS TBF Establishment Attempts]