Patent ID: 7991404

Claim:
A congestion control method in a mobile communication network, comprising: recognizing by a base station control unit of the mobile communication network that the base station control unit or a base station under the base station control unit or a cell under the base station control unit becomes in a congestion state; and when the congestion state was recognized, sending a notice to the base station control unit or the base station or a mobile terminal that is located in the cell, which is in the congestion state, about congestion information that is information on the congestion state, based on control performed by the base station control unit, so that a user of the mobile terminal can recognize the congestion state, wherein the base station control unit that recognized the congestion state manages the congestion state by the cell, a plurality of mobile terminals to which the notice of the congestion information should be sent are divided into a plurality of groups, the congestion information is generated for each of the groups, the congestion information indicating destinations to which the mobile terminals belonging to each of the groups are moved, and a priority order of the destinations in order to get rid of the congestion state, wherein the destinations or the priority order of the destinations are determined to be different for each of the groups, and the notice of the congestion information is sent to the mobile terminals of each of the groups, the congestion information indicating the destinations or the priority order of the destinations different for each of the groups.