Wireless communication system, wireless relay unit and wireless terminal constituting the wireless communication system, and wireless communication method

摘要

The present invention is to provide a wireless LAN system which achieves a relatively effective use of communication band, while suppressing occurrence of hidden terminal problems. When wireless terminal A and wireless terminal B respectively transmit signals (T 123, T 133 ), and Access Point (AP) in the wireless LAN system recognizes occurrence of contention, if AP successfully recognizes an address of sending source of this signal and a duration of this signal as a result of analyzing any signal from the wireless terminal A, AP transmits a CTS signal which gives a clearance for transmission to the wireless terminal A which is the source of sending the signal (T 113 ). The wireless terminal A which is given the clearance for transmission by the CTS signal, resends a signal identical to the one previously sent (T 127 ), whereas the wireless terminal B which is not given the clearance for transmission by the CTS signal withholds a signal transmission during the duration indicated by the CTS signal.