Patent ID: 8000703

Claim:
A method for registering a location of a mobile station (MS) in a mobile-communication system including a base-transceiver station (BTS), a visitor-location register (VLR), and controllers for controlling the mobile station (MS), the controllers including at least one mobile-switching center (MSC) each controlling at least one radio-network controller (RNC), the method comprising: providing the visitor-location register (VLR) with an in-area-subscriber-registration table including a location-registration number of the controllers, a location-registration-allowable number of the controllers, and cell information of the mobile station (MS), the location-registration number being the number of mobile stations which the controllers are currently controlling, the location-registration-allowable number being the number of mobile stations allowable for the controllers to control, the cell information of the mobile station (MS) including a cell number of a cell in which the mobile station (MS) is located; receiving, by the visitor-location register (VLR), from a mobile station (MS), a location-registration request including cell information received from a radio wave transmitted from the base-transceiver station (BTS); determining, by the visitor-location register (VLR), whether or not the mobile station (MS) is allowed to be located in a controlled area of the controllers, on the basis of the location-registration number of the controller, the location-registration-allowable number of the controller, and the cell information of the mobile station (MS); updating, by the visitor-location register (VLR), the location-registration number of the controllers and the cell information of the mobile station (MS) when the first mobile station (MS) is allowed to be located in a controlled area of the controllers; transmitting, by the visitor-location register (VLR), to the mobile station (MS), a location registration response indicating temporary rejection of a cell indicated by the cell information included in the location-registration request, when the mobile station (MS) is not allowed to be located in a controlled area of the controllers; and receiving, by the visitor-location register (VLR), from the mobile station (MS), a location-registration request including cell information of a next-selection cell which is a cell that is not temporarily rejected by the visitor-location register (VLR) and has a reception radio wave with high intensity second to the temporarily rejected cell.