COMMUNICATION TERMINAL DEVICE, AND CONTROL METHOD AND PROGRAM THEREFOR

To provide a communication terminal device in which time synchronization of a radio frame with a base station is not easily deviated even when a moving speed fluctuates during standby for incoming calls while achieving long-distance communication with the base station and suppressing unnecessary power consumption during standby for incoming calls.SOLUTION: A communication terminal device starts reception of a predetermined number of radio frames in which the same information or data to be received is repeatedly transmitted in a predetermined number of transmissions and subframes from a base station at a predetermined reception start timing. Power is supplied to a receiving unit during a first partial period corresponding to a subframe including a frame synchronization signal from the base station in a wireless frame after successful decoding in which information or data has been successfully decoded from among a predetermined number of wireless frames to perform a reception operation, and the reception operation by the receiving unit is suspended in a second partial period corresponding to another subframe other than the subframe including the frame synchronization signal.SELECTED DRAWING: Figure 5 【課題】基地局との間の長距離通信を達成しつつ着信待受時における不要な電力消費を抑制するとともに、移動速度が着信待受時に変動する場合でも基地局との間の無線フレームの時間同期が外れにくくなる通信端末装置を提供する。【解決手段】通信端末装置は、基地局から所定の送出回数及びサブフレームで同一の受信対象の情報又はデータが繰り返し送出される所定数の無線フレームの受信を、所定の受信開始タイミングに開始する。所定数の無線フレームのうち情報又はデータを正常に復号できた復号成功後の無線フレームにおいて、基地局からのフレーム同期用信号を含むサブフレームに対応する第１部分期間には受信部に電源供給して受信動作を行い、フレーム同期用信号を含むサブフレーム以外の他のサブフレームに対応する第２部分期間には受信部による受信動作を休止する。【選択図】図５