7.10 Handover from Fixed broadband Access with GTP or PMIPv6 on S2b to 3GPP Access

23.1393GPP3GPP system - fixed broadband access network interworkingRelease 17Stage 2TS

This clause shows the combined call flows for a handover from Fixed Broadband Access network via GTPv2 or PMIPv6 based S2b interface to a 3GPP Access (GERAN, UTRAN, E-UTRAN) with GTPv2 or PMIPv6 based S5/S8 interface.

This clause contains the procedure steps that vary between the GTP and PMIP variant of S5 and S8 for the TAU with MME and Serving GW change procedure defined in TS 23.401 [2], clause 5.3.3.1 as well as Inter-eNodeB Handover with CN Node Relocation described in TS 23.401 [2], clause 5.5.1.2.

Figure 7.10-1: Handover from Fixed Broadband Access to 3GPP Access

For connectivity to multiple PDNs the same behaviour as described in clause 8.2.1.1 also applies to this procedure.

1. The UE uses Fixed broadband Access and is being served by PDN GW.

A. This step is the same as defined in TS 23 402, clause:

– 8.2.1.1, step 2 to 17 for HO from PMIPv6 on S2b to E-UTRAN with GTP on S5/S8

– 8.2.1.2, step 2 to 18 for HO from PMIPv6 on S2b to E-UTRAN with PMIPv6 on S5/S8

– 8.2.1.3, step 2 to 16 for HO from PMIPv6 on S2b to UTRAN/GERAN with GTP-based S5/S8

– 8.2.1.4, step 2 to 18 for HO from PMIPv6 on S2b to UTRAN/GERAN with PMIPv6 on S5/S8

– 8.6.1.1, steps in (C) for HO from GTP on S2b to E-UTRAN with GTP on S5/S8

– 8.6.1.2, steps in (D) for HO from GTP on S2b to UTRAN/GERAN with GTP on S5/S8

2. The PDN GW shall initiate resource allocation deactivation procedure in the Fixed Broadband Access as defined in clause 7.7

3. If the NS-WLAN offloaded connection is released (e.g. if the UE moves out of WLAN coverage), the Fixed Broadband Access executes the access specific resource release procedure and initiates termination of the IP-CAN session for NS-WLAN offloaded traffic as described in steps 4-6 in clause 7.3