Patent ID: 8169954

Claim:
A transmission rate control method for controlling, at a mobile station, a transmission rate of uplink user data, in a radio communication system capable of controlling a transmission rate of uplink user data based on an absolute transmission rate of uplink user data, which is transmitted via an absolute transmission rate control channel and a relative transmission rate of uplink user data which is transmitted via a relative transmission rate control channel, comprising: notifying, from a radio network controller to the mobile station, information for identifying the absolute transmission rate control channel to be transmitted from a serving cell, when the mobile station establishes a data connection for transmitting the uplink user data; and controlling, at the mobile station, the transmission rate of uplink user data, based on the absolute transmission rate of the uplink user data which is transmitted from the serving cell via the absolute transmission rate control channel, without considering the relative transmission rate of the uplink user data, regardless of whether or not the relative transmission rate control channel is transmitted, when the information for identifying the relative transmission rate control channel is not notified from the radio network controller.