Mobile station equipment and base station equipment and control method

A control method for controlling a mobile station to proceed to a stand-by state in a mobile communication system, said control method comprising the steps of:

• (a) deciding accuracy of data of a first signal transmitted from a base station in the mobile station;
• (b) measuring a signal strength of said first signal in the mobile station;
• (c) transmitting a permission request signal for the mobile station proceeding to a stand-by state process from the mobile station to the base station according to the decided accuracy in step (a) and a comparison result of the measured signal strength of the first signal in step (b) and a first given threshold value;
• (d) measuring a signal strength of said permission request signal transmitted from the mobile station in the base station;
• (e) transmitting permissible information for permitting the mobile station to proceed to the stand-by state process from the base station to the mobile station according to a comparison result of the signal strength of the permission request signal in step (d) and a second given threshold value;
• and
• (f) waiting for permissible information to be transmitted from the base station equipment, and starting the stand-by state process when receiving the permissible information in the mobile station.