公开(公告)号：US09680558B2

公开(公告)日：2017-06-13

申请号：US15213359

申请日：2016-07-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kap-Seok Chang ,  Woo-Yong Lee ,  Kyeongpyo Kim ,  Hyoung-Jin Kwon ,  Hyun-Kyu Chung

IPC: H04B3/36 ,  H04B7/155 ,  H04B7/026 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B7/0417 ,  H04B7/08

CPC classification number: H04B7/15592 ,  H04B7/026 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/086 ,  H04B7/15521 ,  H04L1/0077 ,  H04L1/0618 ,  H04L2001/0097

Abstract: A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.

公开(公告)号：US11956781B2

公开(公告)日：2024-04-09

申请号：US17113048

申请日：2020-12-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Il-Gu Lee ,  Sok-Kyu Lee ,  Hyun-Kyu Chung ,  Dae-Sik Kim

IPC: H04W72/20 ,  H04L5/00 ,  H04L47/70 ,  H04W74/00 ,  H04L1/00 ,  H04W24/02

CPC classification number: H04W72/20 ,  H04L5/0094 ,  H04L47/70 ,  H04W74/002 ,  H04L1/0002 ,  H04L1/0006 ,  H04W24/02

Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.

公开(公告)号：US11848807B2

公开(公告)日：2023-12-19

申请号：US17221464

申请日：2021-04-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kapseok Chang ,  Wooyong Lee ,  Hyun-Kyu Chung

IPC: H04W84/12 ,  H04L27/26 ,  H04W56/00 ,  H04W72/04

CPC classification number: H04L27/261 ,  H04L27/2613 ,  H04L27/2692 ,  H04W56/0085 ,  H04W72/04 ,  H04W84/12

Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.

公开(公告)号：US20210127384A1

公开(公告)日：2021-04-29

申请号：US17113048

申请日：2020-12-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Il-Gu Lee ,  Sok-Kyu Lee ,  Hyun-Kyu Chung ,  Dae-Sik Kim

IPC: H04W72/04 ,  H04L1/00 ,  H04W74/00 ,  H04W24/02

Abstract: A method and apparatus of accessing a channel in a wireless local area network is provided. A destination station receives a request to send (RTS) frame to allocate a network allocation vector from a source station over a first bandwidth and transmits a clear to send (CTS) frame over a second bandwidth to the source station in response to the RTS frame. The second bandwidth is dynamically determined when a first parameter has a predetermined value.

公开(公告)号：US10666350B2

公开(公告)日：2020-05-26

申请号：US15979422

申请日：2018-05-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kap-Seok Chang ,  Woo-Yong Lee ,  Kyeongpyo Kim ,  Hyoung-Jin Kwon ,  Hyun-Kyu Chung

IPC: H04B3/36 ,  H04B7/155 ,  H04B7/026 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B7/0417 ,  H04B7/08

Abstract: A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.

公开(公告)号：US10484221B2

公开(公告)日：2019-11-19

申请号：US15871760

申请日：2018-01-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kapseok Chang ,  Wooyong Lee ,  Hyun-Kyu Chung

IPC: H04L27/26 ,  H04W56/00 ,  H04W72/04 ,  H04W84/12

Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.

公开(公告)号：US09516574B2

公开(公告)日：2016-12-06

申请号：US14593834

申请日：2015-01-09

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyoung-Jin Kwon ,  Sung-Geun Jin ,  Kap-Seok Chang ,  Yong-sun Kim ,  Seung-Eun Hong ,  Woo-Yong Lee ,  Hyun-Kyu Chung

IPC: H04W24/00 ,  H04W72/04 ,  H04W88/04 ,  H04W40/24 ,  H04L12/24 ,  H04B7/155 ,  H04W24/10

CPC classification number: H04W40/246 ,  H04B7/155 ,  H04L41/12 ,  H04W24/10

Abstract: Provided is a communication method of a coordinator, the method including: receiving a relay search request frame for requesting a search for at least one relay station between a destination station and a source station; and transmitting, in response to the relay search request frame, a relay search response frame including a list of the at least one relay station so that the source station selects a target relay station from the at least one relay station.