Patent ID: 8879497

Claim:
A terminal apparatus comprising: a receiving section configured to receive downlink data transmitted on a first component carrier, for which a transmission mode is set to support up to two transport blocks; an error detection section configured to perform error detection on the downlink data; a selecting section configured to select a first physical uplink control channel (PUCCH) resource index from a plurality of PUCCH resource indices according to a transmission power control (TPC) command for an uplink control channel and to select a second PUCCH resource index from the plurality of PUCCH resource indices according to the selected first PUCCH resource index, when a semi-persistent scheduling (SPS) is carried out for the first component carrier to periodically assign downlink resources; and a transmitting section configured to map a response signal, which is indicative of a plurality of error detection results of the downlink data of the first component carrier, to both of a first PUCCH resource and a second PUCCH resource respectively indicated by the first PUCCH resource index and the second PUCCH resource index and to transmit the mapped response signal on an uplink component carrier, wherein the selection of the first PUCCH resource index is performed by selecting a PUCCH resource index corresponding to a value of the TPC command; and the selection of the second PUCCH resource index is performed by selecting another PUCCH resource indicated by a second index by adding 1 to the first PUCCH resource index.