Patent ID: 8566661

Claim:
A radio communication system for radio communication between a radio base station and a mobile station, wherein: the mobile station includes: an information generation section which generates information indicative of a result of error detection on a downlink signal received, and a sending section which sends the information via a physical uplink control channel, and sends uplink data via a physical uplink shared channel at a different transmission frequency from the physical uplink control channel and in a same transmission time period as the physical uplink control channel, wherein the information generation section and the sending section operate when the mobile station receives downlink scheduling information and uplink allocation grant in a same subframe; and the radio base station includes: an information receiving section which receives the information via the physical uplink control channel from the mobile station, and an uplink data receiving section which receives the uplink data via the physical uplink shared channel from the mobile station, wherein the information receiving section and the uplink data receiving section operate after a predetermined time when the radio base station sends the downlink scheduling information and the uplink allocation grant to the mobile station in the same subframe.