Patent ID: 8233908

Claim:
A method of selecting a channel in a first device in a wireless LAN, the method comprising: obtaining information regarding a plurality of channels, wherein the information comprises radar signals or at least one communication area device, which affects communication of the first device if the radar signals or at least one communication area device exists in a channel used by the first device, existing in the channels; determining whether channel switching of the first device is required based on the obtained information; performing negotiation by the first device with a second device to obtain a channel to be used by the first device and a channel to be used by the second device if it is determined that the channel switching of the first device is required, selecting the channel to be used by the first device based on a negotiation result by the first device; and broadcasting information regarding the channel which is used in the communication area of the first device and the channel to be used in a communication area of the first device, wherein the negotiation with the second device is performed by exchanging negotiation frames, wherein the performing of the negotiation comprises comparing a property of data to be transmitted and received by the first device and a property of data to be transmitted and received by the second device, and then selecting a channel which is superior or inferior to the channel to be used by the second device based on the comparison result.