Content for  TS 23.402  Word version:  18.3.0

This clause is related to the case when the UE powers-on in an untrusted network and host-based mobility management mechanism is used to establish IP connectivity and to perform inter-access Handover. Dual Stack MIPv6, RFC 5555 is used for supporting mobility over S2c interface.

The non-roaming (Figure 4.2.2-2), Roaming (Figure 4.2.3-3) and LBO (Figure 4.2.3-5) are all covered in this procedure. In the Roaming and LBO case, the ePDG communicates with the 3GPP AAA Server by way of the 3GPP AAA Proxy, functioning as a relay for AAA messages. In the LBO case, the PDN-GW in the VPLMN interacts with the PCRF by means of the vPCRF. In the non-roaming case, the 3GPP AAA Proxy and vPCRF are not involved. This procedure is also used to establish the first PDN connection over an untrusted non-3GPP access with DSMIPv6 on S2c when the UE already has active PDN connections only over a 3GPP access and wishes to establish simultaneous PDN connections to different APNs over multiple accesses. If dynamic policy provisioning is not deployed, the optional step 6 does not occur. Instead, the PDN-GW may employ static configured policies.