A.3 Charging Characteristics in S4-SGSN

32.2513GPPCharging managementPacket Switched (PS) domain chargingRelease 17Telecommunication managementTS

The S4-SGSN does not utilize Charging Characteristics as it does not generate charging information.

Upon activation of a IP-CAN session, the S4-SGSN forwards the Charging Characteristics to the S-GW according to the following rules:

– if Charging Characteristics were received from the HLR/HSS, then they shall be sent as provided by the HLR/HSS, regardless of the home, visiting, or roaming case according to the following rules:

– if Charging Characteristics for the PDN connection (e.g. APN) is present in the subscription information it shall be forwarded;

– if no Charging Characteristics is present for the PDN connection (e.g. APN) but subscription related Charging Characteristics is present, it shall be forwarded.

– if no Charging Characteristics were received from the HLR/HSS, then the S4-SGSN does not forward any Charging Characteristics to the S-GW.

If no charging characteristics were received from the HLR/HSS or from another MME or SGSN, then SGSN does not provide any charging characteristics to any MME or SGSN in mobility cases.

If charging characteristics were received from HLR/HSS, but not for all the IP-CAN bearers, then SGSN does not provide any charging characteristics to any MME or SGSN in mobility cases occuring through GTPv1.