Patent ID: 8107404

Claim:
A wireless communication apparatus comprising: a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein, when there are multiple frequency channels the busy/idle states of which are idle in the space area to which the radio wave is transmitted, the determining unit determines whether to transmit frames using all of the frequency channels which are idle or transmit the frames using a part of the frequency channels which are idle, wherein the determining unit determines whether to transmit the frames using all of the frequency channels which are idle or transmit the frames using a part of the frequency channels which are idle, according to the type of the application of the frames transmitted to the first wireless communication apparatus.