Method and apparatus for transmitting and receiving a white space map information in a wireless local area network system

摘要

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.

主权项

1. A method of transmitting a white space map (WSM) from a first station to a second station in a regulatory domain where a licensed device and an unlicensed device are permitted to operate together in a wireless local area network (WLAN), the method comprising:
obtaining, at the first station from a regulatory database system, available frequency information and maximum allowed transmission power information for available frequencies, wherein the available frequency information indicates frequencies permitted to operate together in the WLAN, by the regulatory database system; and transmitting, from the first station, the WSM to the second station such that the second station operates using one or more channels within the available frequencies identified by the WSM, wherein the WSM comprises a channel number field and a maximum power level field, wherein the channel number field indicates the available frequency information and the maximum power level field indicates the maximum allowed transmission power information for the available frequencies, wherein the WSM further comprises a type field indicating whether the available frequency information is a partial channel list or a full channel list, and a map version field indicating a version of the WSM, wherein a WSM having the most recent version is used by the second station, and wherein the second station, receiving multiple WSMs with the same value of the map version fields and the type fields indicating the partial channel list, constructs a whole channel list using the received multiple WSMs.