Patent ID: 7813754

Claim:
A transmission rate control method of controlling a transmission rate of uplink user data to be transmitted from a mobile station to a radio base station, comprising: starting to transmit, at the mobile station, the uplink user data, at an initial transmission rate which is informed from a network or an initial transmission rate which has been already informed from the network; and increasing, at the mobile station, the transmission rate of the uplink user data, up to a predetermined transmission rate, on a basis of a increase rule of the transmission rate which is beforehand determined, wherein the increase rule is determined in order that the transmission rate of the uplink user data is increased at a transmission time interval of the uplink user data immediately after a round of an N-channel Stop-and-Wait is completed, or at a transmission time interval of the uplink user data immediately after the mobile station receives an acknowledgement signal for the uplink user data from the radio base station.