COMMUNICATION DEVICE, AND RETRANSMISSION CONTROL METHOD

摘要

Provided are a wireless communication device and a retransmission control method, wherein a decline in system throughput caused by the operation of PHICH is avoided. A PHICH reception unit (206) determines whether a received signal in a PHICH region is an ACK signal or a NACK signal. When doing so, the PHICH reception unit (206) does not receive a PHICH in a subframe in which a terminal (200) monitors an E-PDCCH. A control signal reception unit (207) outputs a retransmission prompting signal to a signal allocation unit (210) when the signal outputted from the PHICH reception unit (206) is a NACK signal and when a UL grant was not detected. Meanwhile, when a UL grant was detected, the control signal reception unit (207) outputs the detected UL grant to the signal allocation unit (210). The signal allocation unit (210) maps the transmission signal in accordance with the retransmission prompting signal and the UL grant and transmits the transmission signal from a wireless transmission unit (211).