A wireless communication system includes a first wireless device configured to transmit a first signal including first information, a plurality of second wireless devices each of which is configured to receive the first signal and to transmit a second signal including the first information based on the first signal, and a third wireless device configured to transmit a third signal which requests transmitting of the second signal when third wireless device receives neither the first signal nor the second signal, wherein each of the second wireless devices is configured to transmit the second signal when the third signal is received and the second signal is not received from another second wireless device, and each of the second wireless devices is configured not to transmit the second signal even when the third signal is received, when the second signal is received from another second wireless device.