System and method for interworking between cellular network and wireless LAN

摘要

A method and system for providing a packet data service of a cellular network to an access terminal (AT) that accessed a wireless local area network (LAN) are provided. The AT accessing the wireless LAN transmits a session request message. Once the session request message is received, an interworking-entry server (IES) sends an authentication request for the AT, and after completing authentication on the AT, transmits a session response message to the AT. Once the session response message is received, the AT sets up a generic routing encapsulation (GRE) tunnel to an interworking-packet control function (I-PCF). The I-PCF sets up a GRE tunnel to a packet data serving node (PDSN) that provides the packet data service to the AT. The AT exchanges packet data with the PDSN.