Patent ID: 8600397

Claim:
A mobile communication system which includes a base station, a mobile station for performing a communication with the base station, and a radio network controller for controlling the communication between the base station and the mobile station, comprising: a congestion level determination unit configured to determine a congestion level of a congestion state of an uplink based on at least one of a usage amount of uplink baseband resources and an uplink received power level; and a controller configured to control a communication state of the communication between the base station and the mobile station according to the determined congestion level of the congestion state of the uplink wherein the controlling of the communication state between the base station and the mobile station includes changing at least one of an uplink transmission rate and a downlink transmission rate, and the congestion level determination unit determines the congestion level by selecting one of a higher or lower congestion level than the determined congestion level based on the usage amount of uplink baseband resources and the uplink received power level.