Wireless communication system and method

A method using a wireless communication system, the method comprising:

• transmitting, from a first wireless device, a first signal including first information;
• receiving the first signal by each of a plurality of second wireless devices;
• transmitting, by each of the plurality of second wireless devices, a second signal including the first information based on the first signal;
• transmitting, by a third wireless device, a third signal which requests transmitting of the second signal when third wireless device receives neither the first signal nor the second signal;
• and
• transmitting, by a second wireless device of the second wireless devices, the second signal when the third signal is received by the second wireless device from the third wireless device and when the second signal is not received by the third wireless device from another second wireless device of the plurality of second wireless devices, and not transmitting, by the second wireless device, the second signal even when the third signal is received by the second wireless device from the third wireless device, when the second signal is received by the third wireless device from the another second wireless device.