Patent ID: 8953542
Filing Date: 2015-02-10
Classification: H04L,H04W

Abstract:
1. A method for receiving available channel information by a first station (STA) that operates as an unlicensed device that is allowed to operate in an available channel that is not being used by a licensed device in a whitespace band in a wireless LAN system, the method comprising: receiving a frame including an operating class field, a channel number field, and a maximum transmit power field from a second station; and operating in a channel indicated by the operating class field and the channel number field, wherein the operating class field and the channel number field indicate an available channel that can be used by an unlicensed device, wherein the maximum transmit power field indicates a maximum transmit power that is allowed in the available channel, wherein the first STA further receives an information element including a bit indicating that the frame includes available channel information from the second station, and wherein the information element is an extended capabilities information element.