Patent ID: 9681424
Date: 2017-06-13
CPC Classifications: H04W

Claim:
1. A method for operating a station (STA) in a white space band, in which the station operating as an unlicensed device with permission to operate in an available channel that is not used by a licensed device operates in the white space band by detecting a primary signal of the licensed device, the method comprising: receiving a white space map (WSM) including one or more identification information of available channels from a device having database information; obtaining a measurement result indicating detection of the presence or absence of the primary signal in a specific channel; changing channel availability of the specific channel which is indicated as available in the WSM, including setting a Type field value to a specific value indicating that channel availability in the WSM is identified from database or the measurement result, when the measurement result indicates that primary signal is measured on the specific channel, by the device having database information; and transmitting the WSM to another station, wherein an updated WSM includes specific information indicating: