Patent ID: 8155075

Claim:
A wireless communication system comprising: a mobile station comprising two or more wireless interfaces to which addresses are changeably assigned; a base station for performing a data transfer with said mobile station via said wireless interfaces; a switch for connecting to said base station and switching base stations with which said data transfer is performed; a terminal for performing data communication with said mobile station; and address reassignment means for reassigning an address assigned to a first wireless interface of said two or more wireless interfaces to a second wireless interface, wherein, when said mobile station performs a handover from a first base station to a second base station, said mobile station having used a first wireless interface with a first address as a data transfer address for a data transfer with said first base station before said handover: the second wireless interface searches and connects to the second base station, using a second address different from said first address, as a search address; the first wireless interface uses the first address to disconnect from the first base station after the second wireless interface completes the connection to the second base station; and the first address assigned to the first wireless interface is reassigned to the second wireless interface to be used as a data transfer address for a data transfer between said mobile station and said second base station.