Patent ID: 8055260

Claim:
A mobile communication system comprising: a subscriber original record information management device for managing subscriber original record information that includes mobile terminal information about each mobile terminal and subscriber information about a subscriber who owns said each mobile terminal; and a local subscriber information management device for managing subscriber management information of a mobile terminal located in a management area of the local subscriber information management device; wherein the local subscriber information management device acquires from the subscriber original record information management device the mobile terminal information of the mobile terminal located in the management area of the local subscriber information management device and the subscriber information about a subscriber who owns the mobile terminal located in the management area of the local subscriber information management device to manage the mobile terminal information and the subscriber information, as the subscriber management information; wherein the local subscriber information management device acquires a mobile equipment identity of the mobile terminal located in the management area, from the mobile terminal located in the management area; and wherein the local subscriber information management device selectively performs processing to prevent retention of the subscriber management information of the mobile terminal located in the management area, after a call control process is performed with the subscriber management information, when it is determined that a call control traffic of the mobile terminal located in the management area rarely occurs based upon at least the mobile equipment identity of the subscriber management information.