5.12 Location Change Reporting Procedure for PMIP-based S5/S8

23.4023GPPArchitecture enhancements for non-3GPP accessesRelease 18TS

This clause contains the procedure steps that vary between the GTP and PMIP variant of S5 and S8 for the Location Change Reporting procedure provided in clause 5.9.2 of TS 23.401 [4]. If the Serving GW has received the User Location Information IE and/or user CSG information from MME, this event is reported to the PCRF by means of a Gateway Control and QoS Rules Request, as defined in TS 23.203 [19]. This procedure ensures that the event is reported to the PDN GW as well.

Figure 5.12-1: Notification of the ECGI/TAI information changes

This procedure concerns both the non-roaming (S5) as in Figure 4.2.1-1 and roaming case (S8) as in Figure 4.2.1-2. In the roaming case, the vPCRF in the VPLMN forwards messages between the Serving GW and the hPCRF in the HPLMN. In the case of Local Breakout as in Figure 4.2.3-4, the vPCRF forwards messages sent between the PDN GW and the hPCRF as well. In the non-roaming case, the vPCRF is not involved at all.

The optional interaction steps between the gateways and the PCRF in the procedures in Figure 5.12-1 only occur if dynamic policy provisioning is deployed and the MME has been requested to report the User Location Information IE and/or user CSG information changes to the PGW for the UE.

A.1) The Serving GW informs the PCRF about the change User Location Information IE and/or user CSG information by initiating the Gateway Control and QoS Policy Rules Request Procedure as specified in TS 23.203 [19].

A.2) The hPCRF notifies the PDN GW of the UE Location Information IE and/or user CSG information by initiating the PCC Rules Provision Procedure as specified in TS 23.203 [19]

Step A.2 may be initiated before step A.1 completes.