MOBILE STATION DEVICE, BASE STATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To make a mobile station device existing in a cell of a system in a first communication mode incapable of handling circuit switched communication transit to an ambient cell of a system in a second communication mode capable of handling the circuit switched communication, regardless of a position of the cell of the system in the first mode.SOLUTION: A mobile station 9 comprises: a cell information acquisition unit 22 for acquiring cell information on a cell of a system in a second communication mode from the cell, during a standby in a cell of a system in a first communication mode; a paging request reception unit 30 for receiving a paging request for circuit switched communication from a base station device 4 of the system in the first communication mode; a cell reporting unit 33 for reporting a cell of the system in the second communication mode designated by the cell information to a paging control node device 3 of the system in the first communication mode through the base station device 4, when receiving the paging request; a connection control unit 37 for establishing radio connection with a base station device 8 of the system in the second communication mode on the basis of the cell information; and a paging response unit 34 for transmitting a paging response through the base station device 8.