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.

公开(公告)号：US09749815B2

公开(公告)日：2017-08-29

申请号：US14641559

申请日：2015-03-09

Applicant: AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Young Bae Ko ,  Jae Bum Kim ,  Daewook Shin

IPC: H04W4/06 ,  H04L12/733 ,  H04L12/751

CPC classification number: H04W4/06 ,  H04L45/02 ,  H04L45/20

Abstract: In a method for communicating among a plurality of nodes in a content-centric networking environment, each of a plurality of nodes selects at least one relay node based on topology information on neighbor nodes adjacent within 2 hops from itself. Each of the selected relay nodes determines whether itself is a publisher relay node. Each of the determined publisher relay nodes generates a multi-hop content announce (CA) message including content information of its own 1-hop neighbor nodes, and broadcasts the multi-hop CA message to the plurality of nodes through the selected relay nodes.