Mobile communication method and mobile station

The present invention provides a mobile station, a mobile communication method and system, the mobile station comprising: a control unit, which in the case of a first operation mode of network operation, and a failure has occurred or the first switching center received by the detector out load of the first exchange station exceeds the radio network controller notifies a predetermined threshold value, the case where the restricted access to the first exchange station access restriction signal transmitted to the sent by the second location registration related signal to the second switching center radio control apparatus, the mobile station transmits to a second location registration related signal transferred from the radio station to the second exchange without passing through the first control means switching station is performed according to the second to the first location registration related signal transferred from the radio network controller means two exchange station location registration processing.