Patent ID: 8077674

Claim:
A mobile wireless communication system comprising: a network; a retrieval server connected in wireless communication to said network; a plurality of wireless stations connected in wireless communication to said network; and a mobile communication terminal device making communication, keeping a first wireless link comprising a pair of uplink and downlink with one of said wireless stations, wherein when a strength of an electric field for receiving wireless signal in said downlink is equal to or smaller than a predetermined strength, said mobile communication terminal device transmits a retrieval request to said retrieval server through a wireless station through which said mobile communication terminal device is making wireless communication, to cause said retrieval server to start selecting a new wireless station, changes at least one of profiles (UTP) for transmitting a wireless signal in said uplink, and notifies said wireless station of the changed profile(s), said wireless station changes a profile or profiles (URP) for receiving wireless signal in uplink, corresponding to the changed profile(s) (UTP) for transmitting wireless signal in said uplink, received from said mobile communication terminal device, changes at least one of profiles (DTP) for transmitting wireless signal in said downlink, and notifies said mobile communication terminal device of the changed profile(s) (DTP) for transmitting wireless signal in said downlink, said mobile communication terminal device, until said mobile communication terminal device establishes a second wireless link with said new wireless station notified from said retrieval server, changes a profile or profiles (DRP) for receiving wireless signal in downlink, corresponding to the changed profile(s) for transmitting wireless signal in said downlink, received from said wireless station, to maintain said first wireless link with said wireless station.