| 摘要 |
<p>A base station device with which uplink resource usage efficiency can be improved, even when downlink data is allocated using an ePDCCH for a plurality of CCs. In this device, a control unit (150) generates, for at least a secondary CC, an indicator that indicates a response signal resource to be used for transmission of response signals in response to the downlink data of the plurality of CCs, and a transmission unit (160) transmits control information including the indicator. In a terminal, if control information is received on an individual secondary CC or on two or more CCs from among the plurality of CCs, the response signal resource is determined on the basis of the indicator of the secondary CC. The control unit (150) designates, as the response signal resource in the indicator of the secondary CC, either a first resource for transmitting the response signal in response to the downlink data transmitted by an individual CC only, or a second resource for transmitting a plurality of response signals in response to the downlink data transmitted by each of a plurality of CCs.</p> |
