Patent ID: 7603594

Claim:
A wireless communications system which uses at least two kinds of wireless communication networks, enables to simultaneously connect to a basic access network for executing signaling communication in which communication is controlled so as to be continuously switched and to a wireless access network for executing data communications other than the signaling communication and comprises wireless communication terminals and a wireless communication server, characterized in that: each of the wireless communication terminals comprises a seamless application processing unit for executing connection processing to the basic access network and connection/disconnection processing to and from the wireless access network, an audio application processing unit for transmitting and receiving audio data though the wireless access network, a video application processing unit for transmitting and receiving video data through the wireless access network, a client processing unit having a client function in the signaling communication for controlling the audio application and the video application, a multicast communication node application processing unit for setting multicast reception using at least the two kinds of the wireless communication networks, respective network devices corresponding to the respective wireless communication networks, and position obtaining means of the wireless communication terminals; and the wireless communication server comprises a home agent application processing unit for setting a multicast transmission using at least the two kinds of the wireless communication networks, a basic access network server processing unit for notifying, when the wireless communication networks are continuously switched, the wireless communication terminals of a wireless communication network acting as a switching candidate and managing the signaling communication for communicating the status of the respective wireless communication terminals therebetween and managing the registration/update processing of the respective wireless communication terminals, a relay server processing unit for managing relay of the signaling communication for communicating the status of the respective wireless communication terminals therebetween, a terminal status table for managing the status of the respective wireless communication terminals, and a terminal configuration table for managing the wireless communication networks implemented in the wireless communication terminals, wherein the seamless application processing unit obtains position information from the position obtaining means and notifies the basic access network server processing unit of the position information, and the basic access network server processing unit registers the position information to the terminal status table.