Patent ID: 8068455

Claim:
A radio communication apparatus that performs first radio communication using one first channel having a first channel width, and second radio communication using a second channel having a second channel width that is wider than the first channel width and also having a channel width overlapping with the one first channel and another first channel having the first channel width, wherein the apparatus belongs to a basic service set (BSS) in which the apparatus is allowed to perform the first radio communication and the second radio communication, comprising: an interference detection device configured to detect that interference occurs in the another first channel; a frame generation unit which generates a notification frame that recommends the use of only the one first channel; an instruction unit which instructs the frame generation unit to generate the notification frame when the occurrence of interference in the another first channel is detected by the interference detection device; and a frame transmission unit which transmits the notification frame generated from the frame generation unit in response to the instruction from the instruction unit, wherein when receiving two first frames which have been each transmitted through the first channel width by simultaneously using the two first channels and the contents are mutually the same, if a first frame error rate of one of the two first frames is lower than a first threshold and a second frame error rate of a second frame, which has been transmitted through the second channel width by using the second channel in succession to the two first frames, is higher than a second threshold, the interference detection device determines that interference has occurred in the another first channel among the two first channels.