公开(公告)号：US09980150B2

公开(公告)日：2018-05-22

申请号：US15048070

申请日：2016-02-19

Applicant: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jae Bum Kim ,  Ji Na Han ,  Young Bae Ko

IPC: H04W16/14 ,  H04W8/00

CPC classification number: H04W16/14 ,  H04W8/005

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.