MOBILE STATION DEVICE, WIRELESS COMMUNICATION METHOD, AND CIRCUIT DEVICE

摘要

A mobile station device (1) communicates with a base station device (3). The mobile station device (1) includes a reception unit (205) receiving downlink data and a downlink control channel including information indicating a radio resource for contention based signal transmission, and a transmission unit (207) transmitting at least one of ACK/NACK for the downlink data and a contention based signal when the ACK/NACK and the contention based signal collide with each other in the same uplink time frame.