One object of the present invention is to improve stability of wireless communication, regardless of a movement speed of a mobile station by estimating a movement speed of a mobile station using a signal prepared in advance for a used standard and selecting an appropriate base station. In the wireless communication system 100 according to the present invention, in order to adjust a timing of receiving data from the PHS terminal 110 to a desired timing, base stations 120, 122 transmit an adjustment signal for advancing or delaying data transmission timing in the PHS terminal 110. Thus, the PHS terminal 110 calculates a bias amount of such an adjustment signal to determine high speed movement of the PHS terminal 110 and perform handover from a micro cell base station 120 to a macro cell base station 122.