| 摘要 |
PROBLEM TO BE SOLVED: To provide a mobile station device, a base station device, a communication method, an integrated circuit, and a radio communication system in which the base station device and the mobile station device can determine parameters for an uplink signal or an uplink reference signal in order to efficiently perform intercommunication.SOLUTION: When a mobile station device detects a physical down link control channel in a common search space, the mobile station device transmits an uplink signal generated by using first parameters via a physical uplink control channel, and when the mobile station device detects the physical down link control channel in a user device specific search space, the mobile station device transmits an uplink signal generated by using second parameters via the physical uplink control channel. |
