Patent ID: 8849280

Claim:
A mobile terminal apparatus configured to stand by while switching among a plurality of communication systems, comprising: a communication part configured to select one of the plurality of communication systems and wirelessly communicate with a currently acquired base station; and a control part configured to change a currently selected communication system used by the communication part and perform wireless communication with a newly selected one of the plurality of communication systems, wherein the control part comprising: a broadcast information acquisition part configured to use the communication part to periodically monitor for presence of a predetermined bit of a paging channel used by the currently acquired base station, and when the predetermined bit is present, changing a reception time slot of the paging channel to obtain the broadcast information reported by the paging channel; a system specifying part configured to extract a parameter containing information specifying neighbor communication systems from the broadcast information; and a reselection processing part configured to release a session of the currently selected communication system and acquire a new session with respect to the newly selected communication system specified by the system specifying part.