A.5 Charging Characteristics in S-GW

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

The S-GW shall apply Charging Characteristics to its IP-CAN bearers. It shall either apply the S4-SGSN/MME supplied parameters, or it may be configured to ignore the S4-SGSN/MME supplied Charging Characteristics in any combination of the following cases:

– visiting case, i.e. the the S-GW and the P-GW belong to the same PLMN, the subscriber belongs to a different PLMN;

– roaming case, i.e. the P-GW belongs to a different PLMN;

– home case, i.e. the subscriber belongs to the same PLMN as the S-GW and P-GW; or

– unconditionally, i.e. it always ignores the S4-SGSN/MME supplied parameters.

If the S-GW ignores the parameters supplied by the S4-SGSN/MME, it shall nevertheless accept the IP-CAN session request. It shall then apply its own pre‑configured Charging Characteristics as appropriate, i.e. the home, visiting or roamingbehaviour. The S-GW shall support the configuration of one set of default Charging Characteristics (i.e. home, visiting, roaming).

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

– if Charging Characteristics were received from the S4-SGSN/MME, then they shall be sent as provided by the S4-SGSN/MME, regardless of the home or visiting case;

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