8.2.1 Initial Attach with DSMIPv6 on S2c to trusted Fixed Broadband Access

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

This clause specifies the additional procedures at the UE’s initial attachment to a Fixed Broadband Access which is considered a trusted access to EPC, for the UE to establish the first PDN connection over the Fixed Broadband Access with S2c, and/or for the UE to have offloaded traffic via Fixed Broadband Access.

This procedure establishes a session between the BPCF and the PCRF to provision policy decisions for NS-WLAN offloaded traffic and/or to provision policy decisions for EPC routed traffic.

Figure 8.2.1-1: Initial attachment with DSMIPv6 when S2c is used for roaming, non-roaming and LBO

If dynamic policy provisioning over S9a is not deployed, the optional steps 3,4, 5, 7 and 8 do not occur. Instead, the Fixed Broadband Access Network may employ local policies.

1. The description of this step is the same as clause 7.2, step 1.

2. The description of this step is the same as clause 7.2 step 2. The UE local IP address is used as CoA in S2c signalling.

The steps in 3, 4 and 5 describe PCC Signalling for NS-WLAN offloaded traffic, the triggered is described in clause 7.2.

3. The description of this step is the same as step 3 in clause 7.2.

4. This description of this step is the same as step 4 in clause 7.2.

5. This description of this step is the same as step 5 in clause 7.2.

6. The description of this step is the same as for steps 4-7 in TS 23 402 [3], clause 6.3, with the following information: The UE local IP address (i.e. CoA) and optionally UDP source port number of the DSMIPv6 binding update signalling (if NAT is detected) are forwarded to the PCRF in step 6 of TS 23 402 [3], clause 6.3 (i.e. IP-CAN session establishment procedure).

The step in 7 PCC signalling to provision policies for EPC routed traffic.

7. The description of this step is the same as step 8 in clause 7.2 for GTP case. The UE local IP address is used as CoA in S2c signalling.

8. The description of this step is the same as step 9 in clause 7.2.