C.2 Trusted Non-3GPP IP Access to Trusted Non-3GPP IP Access with DSMIPv6 over S2c Handover

23.4023GPPArchitecture enhancements for non-3GPP accessesRelease 18TS

In this scenario, the session starts in (source) trusted non3GPP access using DSMIPv6 over S2c. The session hands over to another (target) trusted non-3GPP access system. The UE subsequently initiates DSMIPv6 with the same PDN GW to maintain the IP session.

In the non-roaming case, none of the optional entities in Figure C.2-1 are involved.

Figure C.2-1: Trusted non-3GPP to Trusted non-3GPP handover based on S2c

1. The UE uses a source Trusted non-3GPP IP access system. It has a local IP address from the non-3GPP system which is used as a care-of address in the DSMIPv6 registration to the PDN GW. The UE maintains a security association with the PDN GW.

2. The UE decides to initiate an access procedure with a new, target Trusted non-3GPP IP access. The procedure continues with the steps defined in Figure 8.6-1 (A)

3. The UE continues the ongoing session(s) via the same PDN GW maintaining the same IP address.

4. Resources in the source Trusted Non-3GPP IP access are released.