公开(公告)号：US10193624B2

公开(公告)日：2019-01-29

申请号：US15390993

申请日：2016-12-27

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Zan-Yu Chen ,  Ren-Jr Chen ,  Chung-Lien Ho ,  Wen-Chiang Chen

IPC: H04B10/116 ,  H04B10/114 ,  H04Q11/00

Abstract: A visible light communication method performs visible light communication by using a visible light source. In searching a central frequency of the visible light source, a plurality of central-frequency training packets are sent, the central-frequency training packets including a plurality of central-frequency candidates, and one among the plurality of central-frequency candidates is selected as the central frequency of the visible light source based on a first decoding result on the plurality of central-frequency training packets. In searching a bandwidth of the visible light source, a plurality of bandwidth training packets are sent, the bandwidth training packets including a plurality of bandwidth candidates and the central frequency of the visible light source, and one among the plurality of bandwidth candidates is selected as the bandwidth of the visible light source based on a second decoding result on the plurality of bandwidth training packets.

公开(公告)号：US09967886B2

公开(公告)日：2018-05-08

申请号：US14953008

申请日：2015-11-26

Applicant: Industrial Technology Research Institute

Inventor： Chung-Lien Ho ,  Ren-Jr Chen ,  Yi-Ting Wang ,  Wen-Chiang Chen ,  Pang-An Ting

IPC: H04W72/06 ,  H04W72/04 ,  H04L12/741 ,  H04B7/0408 ,  H04B7/06 ,  H04W72/14

CPC classification number: H04W72/046 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0695 ,  H04L45/74 ,  H04W72/0406 ,  H04W72/06 ,  H04W72/14

Abstract: The present disclosure proposes a hierarchical beamforming method and a base station and a user equipment using the same. The method includes following steps. A network entry procedure is performed via a plurality of coarse beams by using a superframe header of a superframe corresponding to each of the coarse beams. In response to a success message associated with the network entry procedure being received, a network entry done message is transmitted by using a preferred coarse beam among the coarse beams. A user equipment (UE) connection is performed via a plurality of fine beams within a direction range of the preferred coarse beam, so as to determine a preferred fine beam by using a frame header of a basic frame corresponding to each of the fine beams, and perform a data packet transmission by using a packet transmission block of the basic frame corresponding to the preferred fine beam.