Abstract
The invention provide caused by PHICH of system throughput caused by descending of wireless communication device and retransmission control method. PHICH receive unit (206) determining to receive PHICH of area of signal is an ACK or NACK. At this time PHICH receive unit (206) in the subframe by the terminal (200) monitors E-PDCCH of does not receive PHICH. A signal receive unit (207) is a NACK and does not detect the UL grant of low indicating retransmission of the signal output to the signal distribution unit in a PHICH from the receive unit (206) of a (210) when detecting the UL grant of low the detection of the UL grant a to signal distribution unit (210). A distribution unit (210) according to UL grant and retransmission indication signal send a mapping and from the wireless send unit (211) send.
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).
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