Wireless communication system, wireless device, method of communications by wireless device, wireless base station, and method of communications by wireless base station

1. A wireless communication system comprising:

a wireless base station; and

a plurality of wireless devices,

wherein one of the plurality of wireless devices sends a first signal to the wireless base station in accordance with a quality of a communication between the plurality of wireless devices communicating via a first wireless resource through a second wireless resource associated with the first wireless resource, wherein the one of the plurality of wireless devices sends a signal corresponding to ON in an on-off modulation as the first signal sent through the second wireless resource when the quality of the communication with one of the plurality of wireless devices is lower than a certain level of quality.

2. The wireless communication system according to claim 1 , wherein the wireless base station sends the one of the plurality of wireless devices a second signal for controlling the communication between the plurality of wireless devices through a third wireless resource associated with the first wireless resource.

3. The wireless communication system according to claim 2 , wherein the wireless base station sends a signal as the second signal through the third wireless resource to inhibit the communication between the plurality of wireless devices.

4. The wireless communication system according to claim 3 , wherein the second signal contains information related to an adjustment of a transmission power of one or more wireless signals transmitted by the one of the plurality of wireless devices.

5. The wireless communication system according to claim 1 , wherein the wireless resources are identified by time and frequencies, and the second wireless resource is periodically allocated in a time domain.

6. The wireless communication system according to claim 1 , wherein the quality of the communication between the plurality of wireless devices is a signal to interference ratio (SIR) of a received wireless signal sent among the plurality of wireless devices, a signal-to-interference plus noise power ratio (SINR) of the received wireless signal sent among the plurality of wireless devices, or an indicator indicating channel quality that is obtained from a result of measurement of a received wireless signal sent among the plurality of wireless devices.

7. The wireless communication system according to claim 1 , wherein the plurality of wireless devices send the respective first signals that are orthogonal to each other through the second wireless resource in accordance with a plurality of qualities of communications between the plurality of wireless devices with a plurality of wireless resources including the first wireless resource.

8. The wireless communication system according to claim 7 , wherein the first signal is a Zadoff-Chu sequence.

9. A wireless device comprising:

a memory; and

a processor coupled to the memory and configured to:

detect a quality of a communication between a plurality of wireless devices communicating via a first wireless resource; and

transmit a first signal to a wireless base station in accordance with the detected quality through a second wireless resource associated with the first wireless resource, wherein the wireless device sends a signal corresponding to ON in an on-off modulation as the first signal sent through the second wireless resource when the detected quality of the communication between one the plurality of wireless devices is lower than a certain level of quality.

10. The wireless device according to claim 9 , wherein the processor is further configured to receive a second signal transmitted by the wireless base station for controlling communication between the plurality of wireless devices, through a third wireless resource associated with the first wireless resource.

11. A wireless base station comprising:

a memory; and

a processor coupled to the memory and configured to:

control an allocation of a first wireless resource used for communication between a plurality of wireless devices; and

receive a first signal sent by one of the plurality of wireless devices in accordance with a quality of communication between the plurality of wireless devices communicating via the first wireless resource through a second wireless resource associated with the first wireless resource, wherein the one of the plurality of wireless devices sends a signal corresponding to ON in an on-off modulation as the first signal sent through the second wireless resource when the quality of the communication with the one of the plurality of wireless devices is lower than a certain level of quality.

12. The wireless base station according to claim 11 , wherein the processor is further configured to transmit a second signal to at least one of the plurality of wireless devices through a third wireless resource associated with the first wireless resource, the second signal to control the communication between the plurality of wireless devices.

13. A method of communications by a wireless base station, the method comprising:

controlling an allocation of a first wireless resource for communication between a plurality of wireless devices; and

receiving a first signal sent from one of the plurality of wireless devices in accordance with a quality of the communication between the plurality of wireless devices communicating via the first wireless resource through a second wireless resource associated with the first wireless resource, wherein the one of the plurality of wireless devices sends a signal corresponding to ON in an on-off modulation as the first signal sent through the second wireless resource when the quality of the communication with one of the plurality of wireless devices is lower than a certain level of quality.

14. The method of communications by the wireless base station according to claim 13 , further comprising:

transmitting a second signal to the wireless device for controlling the communication between the plurality of wireless devices, through a third wireless resource associated with the first wireless resource.