Patent ID: 9295054
Filing Date: 2016-03-22
CPC Classification: H04L,H04W

Claim Text:
1. A communication apparatus comprising: a receiver which, in operation, receives downlink data transmitted on a first component carrier, for which a transmission mode is set to support up to two transport blocks; an error detector which, in operation, performs error detection on the downlink data; a selector which, in operation, selects a first physical uplink control channel (PUCCH) resource index from a plurality of PUCCH resource indices by selecting a PUCCH resource index corresponding to a value of a transmission power control (TPC) command for an uplink control channel and selects a second PUCCH resource index from the plurality of PUCCH resource indices by selecting another PUCCH resource index corresponding to a value generated by adding 1 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 transmitter which, in operation, maps a response signal, which is indicative of a plurality of error detection results of the downlink data of the first component carrier, to either one 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 transmits the mapped response signal on an uplink component carrier.