Patent ID: 7177292

Claim:
A wireless communication system comprising: (a) a plurality of base stations each having a wireless communication device; (b) at least one mobile wireless communication device which makes wireless communication with said base stations; (c) at least one terminal device transmitting IP packets to and receiving IP packets from said mobile wireless communication device; and (d) a router through which said base stations make communication with an IP network, wherein said terminal device transmits an address thereof to said mobile wireless communication device, before said mobile wireless communication device makes link with one of said base stations, said terminal device fabricates a frame addressed to an address of said router having been received through said mobile wireless communication device, and transmits the thus fabricated frame to said router through both said mobile wireless communication device and said one of said base stations, after said mobile wireless communication device has made link with one of said base stations, said router transmits an address thereof to said base stations, before said mobile wireless communication device makes link with one of said base stations, said router fabricates a frame addressed to an address of said terminal device having been received through said one of said base stations, and transmits the thus fabricated frame to said terminal device through both said mobile wireless communication device and said one of said base stations, after said mobile wireless communication device has made link with one of said base stations.