Abstract:
A node device using a TV white space (TVWS) includes a decision unit for comparing energy levels of a first sub-channel and at least one second sub-channel adjacent to the first sub-channel among a plurality of sub-channels with respect to a digital TV (DTV) channel including the plurality of sub-channels and deciding whether the DTV channel is an available channel, and a discovery unit for, if the DTV channel is decided as the available channel, discovering a beacon by scanning the first sub-channel in the DTV channel.