RELAY STATION, BASE STATION, TRANSMISSION METHOD AND RECEPTION METHOD

摘要

A relay station (200) is used in communication systems in which PCells and SCells are used in backhaul communication between a base station (100) and the relay station (200), DL BHSFs of the PCell used in the downlink in backhaul communication and UL BHSFs of the PCell used in the uplink in backhaul communication are set, and UL BHSFs are a prescribed number of subframes after a DL BHSF. An ACK/NACK generation unit (203) generates a response signal for a downlink signal received in the PCell and SCells from a base station (100). A transmission unit (205) transmits in a UL BHSF of a PCell a response signal for downlink signals received in SCells in a subframe other than the DL BHSF of the PCell.