The mobile communication method and a mobile station

In the case of failure or congestion in the first mobile switching center SGSN, the mobile station UE to a first network operation mode of action may be related service registration process and perform location processing on a second original access the exchange MSC / VLR. The UE mobile station, in a case where a first network operation mode of action, by transmitting a first location registration related signal to perform both of the first position and the second switching center exchange station registration processing. The mobile station the UE, even in a case where a first network operation mode of the operation, in case of receiving access to the first switching center SGSN of the limiting signal by transmitting a second location registration related signal, without passing through the first switching center SGSN position is also performed for the second switching center MSC / VLR registration processing.