Communication method, mobile station device, base station device, and mobile communication system

摘要

The disclosed mobile communication system and communication method allow HARQ control information to be transmitted and received with efficient use of wireless resources when a base station device and a mobile station communicate over a wide frequency band using multiple component carriers. In the disclosed communication method, for a mobile station device that uses a first physical uplink control channel resource to send a base station device HARQ control information for a plurality of downlink transport blocks sent over a plurality of downlink component carriers, when one physical downlink control channel is detected in a common search space for a given subframe, the HARQ control information is sent to the base station device using a second physical uplink control channel resource that is different from the aforementioned first physical uplink control channel resource.