Patent ID: 8880089

Claim:
A mobile communication system comprising a plurality of groups, each one of the plurality of groups comprising: a first base station; and a second base station that is a control base station, wherein the first base station comprises: a user information obtaining unit configured to obtain user information in the first base station, and wherein the second base station comprises: a user information obtaining unit configured to obtain user information in the second base station; a base station internal information collection unit configured to collect user information in the first and the second base stations; a resource assignment determination unit configured to determine radio resources that can be used by the first base station and radio resources that can be used by the second base station based on the user information in the first and the second base stations; and a base station group determination unit configured to change base stations to be included in a group to which the second base station belongs, and to be controlled by the resource assignment determination unit based on user information received from another control base station of a group different from a group to which the second base station belongs.