Wireless communication device, wireless communication system, and wireless communication method

1. A wireless communication device comprising:

a reception controller that receives a signal transmitted to a plurality of wireless communication devices including the wireless communication device, and acquires data included in a reception signal;

a detector that detects a retransmission request for requesting retransmission of the data, the retransmission request being transmitted by another wireless communication device by using a channel in accordance with a position of the other wireless communication device, and that identifies the position of the other wireless communication device based on a channel in which the retransmission request has been detected;

a determination unit that determines whether or not to relay data to the other wireless communication device in accordance with a distance to the position identified by the detector; and

a transmitter that transmits the data acquired by the reception controller to the other wireless communication device when the determination unit determines to relay data.

2. The wireless communication device according to claim 1 ,

wherein the detector detects the retransmission request transmitted by using a feedback channel for each zone set in accordance with a geographical coordinate, and identifies a zone corresponding to the feedback channel in which the retransmission request has been detected.

3. The wireless communication device according to claim 2 ,

wherein the determination unit calculates a distance difference between a distance from a transmission source of the data to the zone identified by the detector and a distance from the wireless communication device to the zone identified by the detector, and determines whether or not to relay data to the other wireless communication device by comparing the distance difference and a predetermined threshold.

4. The wireless communication device according to claim 1 ,

wherein the detector detects the retransmission request transmitted by using a feedback channel for each relative zone set based on a position of a transmission source of the data, and identifies a relative zone corresponding to the feedback channel in which the retransmission request has been detected.

5. The wireless communication device according to claim 4 ,

wherein the determination unit calculates a distance difference between a distance from a transmission source of the data to the relative zone identified by the detector and a distance from the wireless communication device to the relative zone identified by the detector, and determines whether or not to relay data to the other wireless communication device by comparing the distance difference and a predetermined threshold.

6. The wireless communication device according to claim 1 ,

wherein the reception controller further acquires control information included in the reception signal, and

the transmitter transmits data acquired by the reception controller by using a retransmission radio resource designated by the control information.

7. A wireless communication device comprising:

a reception controller that receives a signal transmitted to a plurality of wireless communication devices including the wireless communication device, and acquires data included in a reception signal;

a transmitter that, when the reception controller fails in acquire the data, transmits a retransmission request for requesting retransmission of the data by using a channel in accordance with a position of the wireless communication device; and

a reception unit that receives the data from another wireless communication device among the plurality of wireless communication devices, the other wireless communication device having detected the retransmission request, a distance of the other wireless communication device to the position of the wireless communication device satisfying a predetermined condition.

8. The wireless communication device according to claim 7 ,

wherein the transmitter transmits a retransmission request by using a feedback channel corresponding to a zone where the wireless communication device is located among a plurality of feedback channels for a plurality of zones set in accordance with a geographical coordinate.

9. The wireless communication device according to claim 7 ,

wherein the transmitter transmits the retransmission request by using a feedback channel corresponding to a relative zone where the wireless communication device is located among a plurality of feedback channels for a plurality of relative zones set based on a position of a transmission source of the data.

10. A wireless communication system comprising: a transmission device; a first wireless communication device; and a second wireless communication device,

wherein the transmission device includes a wireless transmitter that transmits a signal including data to the first wireless communication device and the second wireless communication device,

the first wireless communication device includes:

a first reception controller that receives the signal transmitted from the transmission device, and acquires data included in a reception signal;

a detector that detects a retransmission request for requesting retransmission of the data, the retransmission request being transmitted by the second wireless communication device by using a channel in accordance with a position of the second wireless communication device, and that identifies the position of the second wireless communication device based on a channel in which the retransmission request has been detected;

a determination unit that determines whether or not to relay data to the second wireless communication device in accordance with a distance to the position identified by the detector; and

a first transmitter that transmits the data acquired by the first reception controller to the second wireless communication device when the determination unit determines to relay data, and

the second wireless communication device includes:

a second reception controller that receives the signal transmitted from the transmission device, and acquires data included in a reception signal;

a second transmitter that, when the second reception controller fails in acquire the data, transmits a retransmission request for requesting retransmission of the data by using a channel in accordance with the position of the second wireless communication device; and

a reception unit that receives the data from the first wireless communication device.