公开(公告)号：US11917669B2

公开(公告)日：2024-02-27

申请号：US17511140

申请日：2021-10-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yu Ro Lee ,  Chang Wahn Yu ,  Heesoo Lee ,  Seung Eun Hong

IPC: H04W72/04 ,  H04W72/542 ,  H04W72/044

CPC classification number: H04W72/542 ,  H04W72/046

Abstract: An operation method performed by a terminal in a communication system may include: receiving, from a TRP, a first discovery signal including an identifier of a first transmission beam by using a first reception beam; measuring a first received signal strength of the first discovery signal; receiving, from the TRP, a second discovery signal including an identifier of a second transmission beam by using a second reception beam; measuring a second received signal strength of the second discovery signal; transmitting, to the TRP, first beam pair information including the identifier of the first transmission beam and an identifier of the first reception and the first received signal strength information; and transmitting, to the TRP, second beam pair information including the identifier of the second transmission beam and an identifier of the second reception beam and the second received signal strength information.

公开(公告)号：US11677452B2

公开(公告)日：2023-06-13

申请号：US17082351

申请日：2020-10-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yu Ro Lee ,  Jae Woo Park ,  Chang Wahn Yu ,  Tae Gyun Noh

IPC: H04B7/06 ,  H04L25/02 ,  H04L5/00 ,  H04W72/21 ,  H04W72/23

CPC classification number: H04B7/0695 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0224 ,  H04W72/21 ,  H04W72/23

Abstract: A method for transmitting and receiving signals, performed by a terminal, in a C-RAN environment, includes sequentially transmitting fixed beams; receiving, from at least one first TRP determined as TRP(s) performing signal transmission and reception with the terminal among the plurality of TRPs, control information including information on whether to transmit a reference signal for reception of downlink data and an index of a transmission beam selected for uplink transmission; and receiving the downlink data from the at least one first TRP, and demodulating the downlink data by using a reception beam weight derived from a weight used for transmission of the fixed beams or by using the reference signal.

公开(公告)号：US10148478B2

公开(公告)日：2018-12-04

申请号：US14581967

申请日：2014-12-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chang Wahn Yu ,  Hee Soo Lee ,  Sok Kyu Lee

IPC: H04L27/26 ,  H04B7/06 ,  H04L25/02 ,  H04B7/08

Abstract: A method and apparatus for estimating a channel in a wireless local area network (WLAN) are provided. A channel estimation apparatus may include a channel estimation information combiner to combine at least one channel estimation information based on a difference between cyclic delay diversity (CDD) values, and a phase applier to generate a first phase value and to apply the first phase value to the combined channel estimation information.