Patent ID: 8155691

Claim:
A mobile communication system, comprising: a plurality of base stations which accommodate a plurality of mobile terminals respectively; a plurality of first base station control devices, each of which accommodates a predetermined number of base stations out of the plurality of base stations; and a second base station control device, connected to a core network, which accommodates the plurality of first base station control devices, wherein the plurality of first base station control devices respectively include, for supporting information identifying a mobile terminal, a mobile terminal data base to store identification information which identifies a base station to which the mobile terminal is subordinate, and a station data base to store an address of the base station, and in order to support information to identify a mobile terminal stored in the mobile terminal data base, the identification information on a base station to which the mobile terminal is subordinate is extracted based on a transmission data format, which is used when a signal is transmitted from the mobile terminal to the second base station control device.