Patent ID: 8588158
Filing Date: 2013-11-19
Classification: H04L,H04W

Abstract:
1. A method of 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 method comprising: acquiring 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, wherein the list of identified available channels indicates frequencies permitted by the regulatory domain database system; generating a white space map (WSM) comprising the list of identified available channels and the maximum allowed transmission powers of the identified available channels; updating the WSM when the station retrieves updated available channel information; and transmitting 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, wherein the updated WSM is used for the another station to determine a white space operation state of the another station, wherein, if the another station fails to retrieve the updated WSM within a predetermined time, the another station changes the white space operation state to unenabled and stops transmitting within the white space, and wherein the station has a regulatory database access capability, and the another station lacks regulatory database access capability.