Congestion control apparatus and congestion control method

Abstract

In order to properly and equally impose a communication restriction in the case where congestion may occur due to a disaster or the like, a congestion control apparatus () includes: collecting means () for collecting mobile station information on a plurality of mobile stations camping on a radio base station to be a target of a communication restriction; grouping means () for dividing, based on the mobile station information, the plurality of mobile stations into a plurality of groups each serving as a unit of the communication restriction, by using a grouping method according to which an imbalance among the groups becomes equal to or less than a predetermined reference; and transmission means () for transmitting information specifying the grouping method. Moreover, the transmission means () transmits, to the mobile station, communication restriction information indicative of restriction contents such that the grouping method can be specified. The restriction contents are displayed on a screen of the mobile station, and a transmission restriction, a talk time restriction or the like is imposed in accordance therewith.