公开(公告)号：US10893542B2

公开(公告)日：2021-01-12

申请号：US16078229

申请日：2016-02-22

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Dong Ho Cho ,  Byung Chang Chung ,  Dae Hee Park ,  Joon Sang Han ,  Yun Sik Kim

IPC: H04B7/04 ,  H04B7/0408 ,  H04W74/08 ,  H04B7/06 ,  H04W4/029

Abstract: A random access method in a beam division multiple access (BDMA) system including: receiving, by a terminal, a reference signal of at least one beam sector transmitted from an access point (AP) device; estimating, by the terminal, whether the terminal is in a center area of the beam sector provided by the AP device or in the boundary area of the beam sector by using the strength of the reference signal; transmitting, by the terminal, a different preamble to the AP device in accordance with location information of whether the terminal is located in the center area or in the boundary area; and determining, by the AP device, a target beam sector for transmitting information about uplink resources to be used by the terminal, among a plurality of beam sectors on the basis of the received preamble.

公开(公告)号：US10536201B2

公开(公告)日：2020-01-14

申请号：US15526623

申请日：2016-02-22

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Dong Ho Cho ,  Byung Chang Chung ,  Dae Hee Park ,  Joon Sang Han ,  Yun Sik Kim

IPC: H04W72/08 ,  H04B7/0413 ,  H04B7/06

Abstract: A coordinated transmission method based on beam division multiple access and an apparatus performing the same are disclosed. The coordinated transmission method in a beam division multiple access environment, which divides a service target region into a plurality of beam sectors through a plurality of antenna arrays having at least one of a pattern characteristic and a polarization characteristic, includes receiving a coordination request from a user terminal located in the service target region and performing any one among a macro diversity operation, a coordinated silence operation, and a coordinated beamforming operation for the user terminal based on an interference level included in the coordination request.

公开(公告)号：US10033451B2

公开(公告)日：2018-07-24

申请号：US15441917

申请日：2017-02-24

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Dong Ho Cho ,  Byung Chang Chung ,  Dae Hee Park ,  Joon Sang Han ,  Yun Sik Kim

IPC: H04B7/08 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/10 ,  H04L5/00

Abstract: A receiving apparatus based on pattern/polarization beam division multiple access (BDMA) including an antenna configured to receive a reference signal related to at least one of patterns and polarizations of a plurality of antennas included in a transmitting apparatus, and configured to transmit channel information, and a controller configured to select a particular antenna group among a plurality of antenna groups that are grouped from the plurality of antennas included in the transmitting apparatus using the reference signal, and configured to generate the channel information corresponding to the particular antenna group.