Patent ID: 7212510

Claim:
A wireless local area network system comprising: a wireless local area network master station for supporting communication between satellite stations belonging to a master station, and one or more wireless local area network satellite stations, wherein the satellite station in the relevant local area network comprises an antenna for dynamically changing a directivity characteristic when receiving electric waves from the master station; a control frame transmitting unit transmitting control frames prior to the commencement of communication; and an antenna directivity characteristic controlling unit determining such a directivity characteristic that the receiving electric field intensity of a carrier wave transmitted from the master station when receiving the relevant control frame may become a maximum by changing the directivity characteristic of said antenna, and the master station in the relevant local area network system comprises a carrier wave transmitting unit starting to transmit carrier waves when receiving said control frame, and wherein directions of radiating directivity characteristic can be freely changed on a hemispherical plane of an antenna plane by changing each power feeding phase using phase shifters.