| 摘要 |
The present invention is designed so that uplink transmission is carried out adequately even when CA is executed by employing different duplex modes between multiple cells. A user terminal communicates with an FDD cell and a TDD cell employing carrier aggregation, and has a receiving section that receives DL signals transmitted from each cell, and a feedback control section that allocates and feeds back delivery acknowledgement signals in response to each DL signal in a predetermined UL subframe, and the feedback control section aggregates and allocates the delivery acknowledgement signals for the DL signals from each cell, in an uplink control channel in the UL subframe of the TDD cell, and, furthermore, applies a feedback mechanism that makes it possible to allocate delivery acknowledgement signals for all DL subframes of the FDD cell, and, when the number of bits of the delivery acknowledgement signals that are multiplexed in the uplink control channel of the UL subframe of the TDD cell exceeds a predetermined value, compresses and multiplexes a plurality of delivery acknowledgement signals of the FDD cell. |
