Importance

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Abstract

A method and an apparatus transmitting and receiving a White Space Map information between two stations in a wireless local area network system are disclosed. For transmitting a white space map information from a first station to a second station in a regulatory domain where a licensed device and an unlicensed device are permitted to operate in a wireless local area network (WLAN), the method comprises: obtaining, at the first station, a list of available channels with a first channel granularity and maximum allowed transmission powers of the available channels from a regulatory database; and transmitting, from the first station, one of a beacon frame, a probe response frame and a white space map announcement frame comprising a white space map (WSM) element to the second station such that the second station operates as the unlicensed device using one or more channels having a second channel granularity and located only within the available channels identified by the WSM element, wherein the WSM element comprises a channel number field and a maximum power level field, wherein the channel number field indicates the list of available channels with the first channel granularity and the maximum power level field indicates maximum allowed transmission powers of the available channels.

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First Claim