Patent ID: 7610049

Claim:
A wireless communication system comprising a mobile station which includes a plurality of wireless interfaces, a server connected to a network, and a plurality of access points each of which is connected to said network and communicates with said mobile station via one of the plurality of wireless interfaces, wherein the plurality of wireless interfaces of the mobile station perform communication conforming to at least two different wireless communication standards, wherein said mobile station comprises a control unit which determines available foreign wireless interfaces which are accommodated by each of said access points and differ from the wireless interfaces of said mobile station, wherein said mobile station sends notification of the available foreign interfaces' identifiers to said server via one of said plurality of wireless interfaces thereof; and wherein said server comprises a control unit which collects managerial data measured at said plurality of access points and selects a foreign wireless interface based on said notification from said mobile station and said managerial data, and a communication unit which sends notification of the selected foreign wireless interface's identifier to said mobile station, the notification comprises the identifiers and communication conditions of the available foreign wireless interfaces, and said server includes means for selecting a foreign wireless interface operating at the highest data rate from said available foreign wireless interfaces as an in-service wireless interface, said mobile station transmits a handover request message to said server to execute a handover from one of the plurality of access points which accommodates the mobile station using one of the foreign wireless interfaces to another one of the plurality of access points which corresponds to the target of the handover using the foreign wireless interface selected by the server, said control unit of said server controls packet transmission path routing, based on said handover request message from said mobile station, and wherein the managerial data comprises radio conditions of the wireless interfaces accommodated by the access points, packet discard ratios, packet error counts, a number of packets received at the access points, and an amount of data received per unit.