A mobile station (MS) performs a measurement of cells on a plurality of downlink frequencies used for a connection with a base station apparatus. The MS also detects a first indication or a second indication, based on the measurement of each cell designated by the base station apparatus, the first indication indicating a measurement result of a cell becomes lower than a first threshold and the second indication indicating a measurement result of a cell becomes higher than a second threshold. In addition, the MS, in a case where a reconnection procedure is started by expiring a timer corresponding to the each cell, selects a cell, and initiates a random access procedure for requesting a reconnection in the selected cell. Further, the timer is started if the first indication is indicated consecutively for a certain number of times.