WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, WIRELESS DEVICE, AND WIRELESS BASE STATION

1 . A wireless communication system, comprising:

a wireless base station;

a first wireless device that performs wireless communication with the wireless base station;

a plurality of second wireless devices,

wherein the first wireless device transmits identification information of the first wireless device using a radio resource allocated for device-to-device communication, the device-to-device communication being performed between the second wireless devices without going through the wireless base station.

2 . The wireless communication system according to claim 1 ,

wherein the second wireless device decodes allocation information of a radio resource, the allocation information being encoded by the wireless base station using the identification information and being transmitted to the first wireless device, using the identification information received from the first wireless device, and controls a radio resource to be used for the device-to-device communication to a radio resource not overlapping with a radio resource indicated by a decoded result of the allocation information.

3 . The wireless communication system according to claim 1 ,

wherein the second wireless device transmits the identification information received from the first wireless device to the wireless base station, and

the wireless base station controls a radio resource to be used by the first wireless device to perform wireless communication with the wireless base station, the first wireless device being identified by the received identification information, to a radio resource not overlapping with the radio resource allocated for the device-to-device communication.

4 . The wireless communication system according to claim 1 ,

wherein the second wireless device inhibits the device-to-device communication in response to a reception of the identification information transmitted by the first wireless device.

5 . The wireless communication system according to claim 1 ,

wherein the second wireless device inhibits the device-to-device communication when the number of pieces of received identification information exceeds a threshold value.

6 . The wireless communication system according to claim 1 ,

wherein the first wireless device puts the identification information of the first wireless device in a discovery signal to discover a wireless device that performs the device-to-device communication, and transmits the discovery signal.

7 . A wireless communication method, comprising:

transmitting, by a first wireless device that performs wireless communication with a wireless base station, identification information of the first wireless device using a radio resource allocated for device-to-device communication, the device-to-device communication being performed between the second wireless devices without going through the wireless base station.

8 . A wireless device that performs wireless communication with a wireless base station, the wireless device comprising:

a transmitter configured to transmit identification information of the wireless device using a radio resource allocated for device-to-device communication, the device-to-device communication being performed between other wireless devices without going through the wireless base station.

9 . A wireless device serving as a second wireless device that performs device-to-device communication with a first wireless device without going through a wireless base station, the second wireless device comprising:

a receiver configured to receive identification information of a third wireless device, the identification information being transmitted by the third wireless device that performs wireless communication with the wireless base station using a radio resource allocated for the device-to-device communication.

10 . The wireless device according to claim 9 , further comprising,

a decoder configured to decode allocation information of a radio resource, the allocation information being encoded by the wireless base station using the identification information and being transmitted for the third wireless device, by using the identification information received by the receiver; and

a controller configured to control a radio resource to be used for the device-to-device communication to a radio resource not overlapping with a radio resource indicated by a decoded result of the allocation information.

11 . The wireless device according to claim 9 , further comprising,

a transmitter configured to transmit the identification information received by the receiver to the wireless base station.

12 . The wireless device according to claim 9 , further comprising,

a controller configured to inhibit the device-to-device communication in response to a reception of the identification information by the receiver.

13 . The wireless device according to claim 9 , further comprising,

a controller configured to inhibit the device-to-device communication when the number of pieces of identification information received by the receiver exceeds a threshold value.

14 . A wireless base station that performs wireless communication with a wireless device, the wireless base station comprising:

a receiver configured to receive the identification information transmitted from the transmitter according to claim 11 ; and

a controller configured to control a radio resource to be used by the third wireless device to perform wireless communication with the wireless base station, the third wireless device being identified by the received identification information received by the receiver, to a radio resource not overlapping with the radio resource allocated for the device-to-device communication.