Resumption of PDN Connections for Devices Regaining WLAN Connectivity

An apparatus of a user equipment (UE) configured to support a multi-legged or a multi-access packet-data-network (PDN) connection with a plurality of radio access technologies (RATs), the apparatus comprising circuitry configured to:

• communicate with an evolved node B (eNB) in a cellular network and with an access point (AP) in a wireless local area network (WLAN), wherein the WLAN is configured to communicate with a trusted wireless-local-area-network access gateway (TWAG) and the TWAG is configured to communicate with a packet-data-network gateway (PDN-GW) of the cellular network via an S2a interface;
• and
• detect when the UE has lost connectivity with the WLAN;
• and
• send a WLAN-connectivity-loss communication to the PDN-GW via the eNB when the loss of connectivity with the WLAN has been detected.

A non-transitory computer-readable medium having instructions thereon which, when executed by one or more processors, perform the following:

• receiving a trigger communication at a trusted wireless-local-area-network access gateway (TWAG) from an access point (AP) in a Wireless Local-Area Network (WLAN);
• detecting that a UE has lost connectivity with the WLAN based on the trigger communication;
• sending a suspension communication to a packet-data-network gateway (PDN-GW);
• and
• storing PDN context information associated with the UE for a predefined period of time.