Patent ID: 7885265

Claim:
A transmission control method for uplink user data in a mobile communication system in which a plurality of HARQ processes is applied to the uplink user data to be transmitted from a mobile station to a radio base station, comprising: notifying, from the radio network controller to the mobile station, at least one of an HARQ process applying a scheduled transmission process, an HARQ process applying a non-scheduled transmission process, and an HARQ process applying a scheduled and non-scheduled transmission process; and transmitting, at the mobile station, the uplink user data in each HARQ process to the radio base station using at least one of a scheduled transmission and a non-scheduled transmission, based on the notification; wherein in the scheduled transmission process, the scheduled transmission for transmitting the uplink user data based on a transmission allocation by the radio base station, is performed; in the non-scheduled transmission process, the non-scheduled transmission for transmitting the uplink user data automatically without following the transmission allocation by the radio base station, is performed, and in the scheduled and non-scheduled transmission process, at least one of the scheduled transmission and the non-scheduled transmission, are performed.