Patent ID: 7616598

Claim:
A system for providing seamless communication when a mobile station moves between a wireless local area network (LAN) system and a mobile communication system, the system comprising: a packet data service node for providing a packet data service between an Internet Protocol (IP) network and the mobile station when the mobile station accesses the mobile communication system; a packet control function for providing the packet data service between a correspondent node connected to the IP network and the mobile station when the mobile station previously connected to the mobile communication system is connected to an access point, and providing the packet data service between the correspondent node connected to the IP network and the mobile station when the mobile station previously connected to the access point is connected to a base station system; and an interworking server is connected between the access point of the wireless LAN system and the packet control function of the mobile communication system, for coupling the packet control function to the access point when providing the packet data service to the mobile station.