MOBILE STATION DEVICE AND CONTROL PROGRAM THEREFOR

PROBLEM TO BE SOLVED: To enable type determination of a sub-frame on the basis of reception power of reference signals received from a base station device.SOLUTION: A mobile station device and a control program therefor are applied to a time sharing wireless communication system (wireless communication system 2) which allocates a wireless resource supporting sub-frame types including an uplink direction and a downlink direction to sub-frames in one wireless frame by a time sharing method. For each sub-frame included in the one wireless frame, in the device, a measurement unit 10 measures reference signal reception power (RSRP) without distinguishing a sub-frame type, and a determination unit 12 determines the sub-frame type on the basis of the measured value.