Channel access method and access point

Embodiment of the present invention provides a channel access method and access point. The method comprising: a first system will listen for a first time stamp AP channel reserved time listening to the first STA transmits a first identification system to indicate a first time within the listening STA no information is transmitted without performing random access; sequence code for the random access channel listening hours at the second system searches search result is obtained, whether the competition result of the determination in accordance with the channel search; If the competition to the channel in the continuously transmits a first downlink message on a downlink sub-frame of the next TXOP time the listener, and to receive uplink information transmitted from the first STA transmits a second downlink or the information on the uplink sub-frame of a TXOP. Technical Solution The present invention provides a new channel access mechanism, may be implemented with a conventional WiFi systems coexist next WiFi systems.