7 Non-seamless WLAN Offload

24.1393GPP3GPP system - fixed broadband access network interworkingRelease 17Stage 3TS

7.1 General

A non-seamless offload capable UE selects a fixed broadband access network for non-seamless WLAN offload as specified in 3GPP TS 23.139 [2].

7.2 UE procedure

The UE may use any local IP address(es) for non-seamless WLAN offload traffic regardless of the selected IP mobility protocol. The UE local IP address allocation procedure is specified in BBF TR-146 [17].

The UE may support the UE reflective QoS for non-seamless WLAN offload uplink traffic as specified in subclause 5.2. The UE reflective QoS function may be enabled by the network at EAP-AKA and EAP-AKA’ based access authentication, during IKEv2 signalling for IPsec tunnel establishment with the ePDG, or during DSMIPv6 bootstrapping with PDN-GW/HA, as specified in subclause 5.4.

7.3 Network procedure

At EAP-AKA and EAP-AKA’ based access authentication, during IKEv2 signalling for IPsec tunnel establishment with the ePDG, or during DSMIPv6 bootstrapping with PDN-GW/HA, the 3GPP AAA server may enable the UE reflective QoS function. The fixed broadband access network may provide QoS on the non-seamless WLAN offload traffic after successful 3GPP based access authentication.

When forwarding a downlink data packet to a UE, the fixed broadband access network may set the DSCP value on the outer IP header of each IP packet at per-flow basis as specified in subclause 5.3.