Wlan channel resource allocation method and apparatus, a wireless LAN communication system

The present invention provides a WLAN channel resource allocation method and apparatus, a wireless local area network communication system, wherein the method comprises: obtaining subcarrier allocation information, the subcarrier allocation information identifying sub-carriers for carrying data is used, where the subcarriers sub-channel quality is greater than or equal to the decision threshold; according to the subcarrier allocation information, transmits data on the subcarriers. The present invention reduces the waste of terminal transmit power, and, since no longer limited to a poor channel quality down subchannel modulation order can be increased.