Patent ID: 8639210

Claim:
A mobile station apparatus applied to a mobile communication system that includes a first base station apparatus capable of restricting an access of a normal call from the mobile station apparatus having not been registered and a second base station apparatus other than the first base station, the mobile station apparatus comprising: a processing unit configured to be able to restrict an access to the first base station apparatus or the second base station apparatus by an access class, wherein the access class is used for determination of a priority of a communication of the mobile station apparatus and the access class is a first access class applied for an emergency call or a second access class applied for a normal call; and perform cell selection to determine an appropriate cell as a cell of a reconnection destination in a reconnection procedure trying to reestablish radio connection with either the first base station apparatus or the second base station apparatus, wherein the reconnection procedure is started by the mobile station apparatus after the communication with the first base station apparatus or the second base station has failed, and the cell selection in the reconnection procedure is performed, on the basis of: measurement results of cells, the access class, and information acquired from broadcast information, indicating whether each access to the measured cells in each access class of the mobile station apparatus is restricted, and in the cell selection, the cell of the first base station apparatus and the cell of the second base station apparatus can be determined to be appropriate cells as a cell of a reconnection destination, in the case that the first access class is applied to the failed communication.