RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD

摘要

A terminal (101) includes interface for communication with mobile network (102) and a radio LAN network (103). A first IMS server (107) performs call control processing of the IMS relating to terminals existing in the mobile network (102). A second IMS server (111) relays a signal relating to a call control processing of the IMS relating to terminals existing in the radio LAN network (103). These IMS servers relay a route switching request by searching a relay device as a control object of the route switching request requesting switching between a mobile packet relay device (106), a packet data relay device (110), and a packet transmission path. The route switching request from the terminal (101) is related by the IMS server, and a switching request is outputted to the entire network of the specified object. According to the request, the relay device switches the packet transmission path. Thus, a terminal having an interface with the both of the mobile communication and the radio LAN can select a network to be used for each communication port.