Patent ID: 8804626

Claim:
A transmission rate control method for controlling a transmission rate of uplink user data which is transmitted from a mobile station located in a predetermined cell to a radio base station, comprising: notifying, from the radio base station to the mobile station, a transmission power offset of an enhanced dedicated physical data channel to a dedicated physical control channel using an absolute grant transmission rate control signal which is transmitted through an absolute grant channel; transmitting, at the mobile station, the uplink user data based on the notified transmission power offset, at a determined HARQ process value from a set of HARQ processes after receiving the absolute grant transmission rate control signal, the determined HARQ process value being for transmitting data of which the transmission rate is controlled based on the absolute grant transmission rate control signal from the radio base station; and wherein the determined HARQ process value is determined by a radio network controller from the set of HARQ processes and is notified from the radio network controller.