I am going through the spec 3gpp 29.219(Sy interface) and trying to understand the call flow and AVPS between the OCS and PCRF.
The PCRF sends the the list of Policy counters to OCS initially and OCS will store it against the Sy session. How does the Counter identifiers be identified uniquely b.w OCS and PCRF ?
Because the spec says, If the OCS determines that any policy counter identifiers are invalid, the OCS shall return a response with the Result-Code AVP set to DIAMETER_INVALID_AVP_VALUE.
But my doubt is, how the Policy counter Ids are known across the OCS and PCRF.
Any help in this area is very helpful