1. A radio access network element comprising:a base station configured to,
send an access point addition message to a wireless local area network (WLAN) access point, the access point addition message including a WLAN address for a user equipment, and requesting that the WLAN access point add the WLAN address to a list of user equipments allowed to access a WLAN subsystem identified by a service set identifier (SSID) at the WLAN access point;
instruct the user equipment to connect to the WLAN subsystem identified by the SSID;
obtain, from the WLAN access point, a local Internet Protocol (IP) address assigned to the user equipment by the WLAN access point;
maintain a mapping between the local IP address and a UE session identifier associated with a cellular IP connection for the user equipment;
allocate, based on received radio link measurement information, at least a first portion of downlink packet data convergence protocol (PDCP) packets received at the base station for delivery to the user equipment over a WLAN link between the user equipment and the WLAN subsystem at the WLAN access point and a second portion of the received downlink PDCP packets for delivery to the user equipment over the cellular IP connection, the received radio link measurement information being indicative of at least one of a WLAN link quality and a loading of the WLAN link; and
output the first portion of the received downlink PDCP packets to the WLAN access point for delivery to the user equipment over the WLAN link based on the mapping.