| 摘要 |
The present invention appropriately performs uplink transmission even when performing CA using different duplex modes between a plurality of cells. A user terminal for communicating by using an FDD cell, a TDD cell, and a carrier aggregation has a receiving unit for receiving a DL signal transmitted by each cell, and a feedback control unit for feeding back by assigning a delivery confirmation signal in response to the received DL signal to a prescribed UL subframe. Therein, regardless of whether the cell is set as a primary cell, the feedback control unit feeds back the delivery confirmation signal using one or both UL subframes when a UL subframe is set in both the FDD cell and the TDD cell, and feeds back the delivery confirmation signal using the UL subframe of the FDD cell when a UL subframe is set only in the FDD cell. |
