Patent ID: 7263366

Claim:
A channel selection method in a communication system for making communication between a first wireless station and one or each of a plurality of second wireless stations different from said first wireless station by employing one of a plurality of wireless channels, wherein: said first wireless station performs the steps of: transmitting a first channel change notification including a first time until a channel change and a change destination channel to said second wireless station; and prior to a lapse of said first time, transmitting a second channel change notification including a second time until a channel change and a change destination channel to said second wireless station; and said first and second wireless stations perform a step of assuming the time until the channel change to be said second time, further comprising setting said second time to be included in said second channel change notification that is transmitted after interference occurrence to a time equal to or less than said first time, further comprising said first wireless station: prior to a lapse of said second time, transmitting a third channel change notification including a third time until a channel change and a change destination channel to said second wireless station; setting said third time to a time that becomes identical to a channel change timing that is indicated by said second time; in a case where an interference improvement was detected before a lapse of said second time since the interference occurrence, transmitting a fourth channel change notification including a fourth time until a channel change and a change destination channel to said second wireless station; and setting said fourth time to a time longer than said second time.