Patent ID: 7602759

Claim:
A wireless LAN (Local Area Network) system supporting distributed coordination, comprising: a base station bridging wireless and wired networks, and controlling the distributed coordination; a mobile station located in a wireless area for communicating on a wireless basis in an infrastructure mode to said base station; and a controller for monitoring wireless communication in the infrastructure mode; said controller comprising: a frame analyzer for analyzing a frame received on the wireless communication; a determination section for determining whether or not a frame received at a predicted time calculated on a basis of a rule of frame for a service on a layer higher than a media access control layer is an intended frame based on a result from said frame analyzer; and a frame transmitter operative in response to said determination section determining that the frame received is different from the intended frame and is not in conformity with the rule of frame for specifying a duration value in a duration/ID field of a frame to be transmitted to a destination station that should be given first priority, and sending out the frame to be transmitted.