8.2.2 UE-initiated Detach Procedure and UE-Requested PDN Disconnection with DSMIPv6 on S2c in trusted Fixed Broadband Access

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

The procedure in this clause applies to UE-initiated detach procedures (e.g. triggered by power-off), and to the UE-requested PDN disconnection procedure.

In the case when UE has multiple PDN connections, this detach procedure shall be repeated for each PDN connection.

This clause also covers the termination of the IP-CAN session for UE’s offloaded traffic initiated by the Fixed Broadband Access network.

Figure 8.2.2-1: UE-initiated detach procedure with DSMIPv6 on trusted s2c

If dynamic policy provisioning is not deployed, the optional steps 2, 4 and 5 do not occur. Instead, the Fixed Broadband Access network may employ local policies.

1. The descriptions of these steps are the same as UE-initiated PDN disconnection procedure in trusted non-3GPP access network as specified in TS 23 402 [3], figure 6.5.2-1 steps 1-4 and 6.

2. Triggered by the IP-CAN session termination, if this is not the last PDN connection for the UE, the PCRF executes a Gateway Control and QoS Rules Provision procedure; otherwise, if this is the last PDN connection for the UE, a PCRF-Initiated Gateway Control Session Termination Procedure with the BPCF over S9a.

3. The description of this step is the same as clause 7.3 step 4.

4. The description of this step is the same as clause 7.3 step 5.

5. The description of this step is the same as clause 7.3 step 6.