Method and apparatus for protecting a primary service in WLAN system

摘要

A method and an apparatus for protecting a primary service as an unlicensed device in a regulatory domain where a licensed device and the unlicensed device are permitted to operate are disclosed. For protecting a primary service by a station as an unlicensed device in a regulatory domain where a licensed device and the unlicensed device are permitted to operate, the unlicensed device acquires a list of identified available channels for the operation of the unlicensed device and maximum allowed transmission powers of the identified available channels from a regulatory domain database system; generates a white space map (WSM) comprising the list of identified available channels and the maximum allowed transmission powers of the identified available channels; updates the WSM when the station acquires information that a primary service signal is detected on a specific channel which is indicated as available in the WSM; and transmits the updated WSM to another station such that the another station moves to another channel if the another station is operating on the specific channel.

主权项

1. A method for a first station to obtain a White Space Map (WSM) from a second station, the method comprising:
receiving, by the first station with a white space operation state of unenabled state, an enabling signal from the second station; receiving, by the first station from the second station, a response frame including the WSM; and performing, by the first station with the white space operation state of enabled state, a transmission only on an available channel indicated in the WSM, wherein, if the first station fails to retrieve an updated WSM within a predetermined time, the first station changes the white space operation state to unenabled state and stops transmitting.