MOBILE STATION DEVICE, COMMUNICATION METHOD AND INTEGRATED CIRCUIT

摘要

Disclosed is a mobile communication system and a mobile communication method which enable high-quality transmission and reception of hybrid automatic repeat request (HARQ) control information in case that a base station apparatus and a mobile station apparatus communicate using a wide frequency band made up of a plurality of component carriers. In a mobile communication system where a base station apparatus and a mobile station apparatus communicate using a plurality of downlink component carriers, the base station apparatus allocates a physical uplink shared channel (PUSCH) resource to the mobile station apparatus for the transmission of the HARQ control information, and the mobile station apparatus uses the PUSCH resource to transmit the HARQ control information to the base station apparatus.