| 摘要 |
PROBLEM TO BE SOLVED: To provide a base station device, a mobile station device, a communication method, an integrated circuit, and a radio communication system, capable of transmitting and receiving downlink data, on the basis of a resource element to which a physical signal/physical channel is mapped, to enable efficient communication.SOLUTION: In a base station device, when transmitting a physical downlink control channel in a user device specific search space, a physical downlink shared channel is mapped to a resource element that satisfies first and second conditions, whereas when transmitting the physical downlink control channel in a common search space, the physical downlink shared channel is mapped to a resource element that satisfies the second condition. |
