公开(公告)号：US20200274804A1

公开(公告)日：2020-08-27

申请号：US16861927

申请日：2020-04-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jee Yon CHOI ,  Jae Woo PARK ,  Hyoung Jin KWON ,  Sok Kyu LEE

IPC: H04L12/741 ,  H04W72/04 ,  H04B7/06 ,  H04B7/0452

Abstract: Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including transmitting, to each of a plurality of stations (STAs), an uplink multi-user request (UL MU request) frame requesting transmission of a data frame, and receiving, from each of the plurality of STAs, the data frame during an identical period of time based on an identical reception intensity, wherein the UL MU request frame includes at least one of information on a transmission time of the data frame and information on a reception intensity of the data frame in the AP.

公开(公告)号：US20200214051A1

公开(公告)日：2020-07-02

申请号：US16812073

申请日：2020-03-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyoung Jin KWON ,  Jae Seung LEE ,  Min Ho CHEONG ,  Hee Jung YU ,  Jae Woo PARK ,  Sok Kyu LEE

IPC: H04W74/08

Abstract: Provided is slot use control apparatus and method, including an access point (AP) to control a slotted channel access of a station (STA) in a wireless local area network (WLAN) includes generating a synchronization (synch) frame including an identification value indicating an STA allocated to a slot, and broadcasting the generated synch frame when a channel is in an idle state at a start point of the slot.

公开(公告)号：US20200186212A1

公开(公告)日：2020-06-11

申请号：US16794140

申请日：2020-02-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jee Yon CHOI ,  Hyoung Jin KWON ,  Je Hun LEE ,  Sok Kyu LEE

IPC: H04B7/0452 ,  H04L1/16 ,  H04B7/0404

Abstract: Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including determining at least one transmission station (STA), transmitting, to the transmission STA, an uplink multi-user poll (UL MU poll) frame requesting a data frame, receiving the data frame from the at least one transmission STA simultaneously, and transmitting an acknowledgement (ACK) frame to the at least one transmission STA in response to the receiving.

公开(公告)号：US20190289539A1

公开(公告)日：2019-09-19

申请号：US16431487

申请日：2019-06-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Seung LEE ,  Min ho CHEONG ,  Je Hun LEE ,  Ja Beom GU ,  Jae Woo PARK ,  Sok Kyu LEE

IPC: H04W48/16 ,  H04W40/08 ,  H04W48/14

Abstract: A scanning method in a wireless local area network (WLAN) system is provided. The scanning method includes transmitting, by a station, a probe request frame and receiving, by the station, a probe response frame from an access point (AP). The AP determines whether to transmit the probe response frame in response to the probe request frame using information indicated by the probe request frame.

公开(公告)号：US20190239161A1

公开(公告)日：2019-08-01

申请号：US16379629

申请日：2019-04-09

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Seung LEE ,  Hyoung Jin KWON ,  Min ho CHEONG ,  Hee Jung YU ,  Sok Kyu LEE

IPC: H04W52/02 ,  H04W74/00

Abstract: An operating mode change method of a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting, by a station (STA) to an access point (AP), an operating mode change request frame comprising at least one of information on a change of a traffic indication map (TIM) mode, a request for a change of a power save parameter, and information on a change of a service type of the STA, receiving, from the AP, an operating mode change response frame comprising at least one of a TIM mode allowed by the AP, a reallocated association identification (AID), and information on a changed power save parameter, and performing at least one of the change of the TIM mode and the change of the power save parameter based on the information included in the operating mode change

公开(公告)号：US20190104531A1

公开(公告)日：2019-04-04

申请号：US16191286

申请日：2018-11-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyoung Jin KWON ,  Sok Kyu LEE ,  Jae Seung LEE ,  Min Ho CHEONG

IPC: H04W72/12 ,  H04L27/26 ,  H04B7/0452 ,  H04L25/02 ,  H04L5/00 ,  H04W84/12 ,  H04B7/0417

CPC classification number: H04W72/121 ,  H04B7/0417 ,  H04B7/0452 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/005 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2613 ,  H04W72/1231 ,  H04W84/12

Abstract: Disclosed are a wireless communication method, and an access point and a station which perform the wireless communication method. A wireless communication method performed by an access point according to an embodiment may include performing channel sounding on a plurality of subchannels, identifying subchannels selected by stations among the subchannels, scheduling communications between the AP and the stations based on the selected subchannels, and transmitting a data frame to the stations through the subchannels based on a scheduling result.

公开(公告)号：US20180007713A1

公开(公告)日：2018-01-04

申请号：US15706085

申请日：2017-09-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min Ho CHEONG ,  Hyoung Jin KWON ,  Jae Seung LEE ,  Jae Woo PARK ,  Sok Kyu LEE

IPC: H04W74/04 ,  H04B7/06 ,  H04B7/0408 ,  H04W48/16 ,  H04W74/08 ,  H04W84/12 ,  H04W16/28

CPC classification number: H04W74/04 ,  H04B7/0408 ,  H04B7/0617 ,  H04W16/28 ,  H04W48/16 ,  H04W74/08 ,  H04W84/12

Abstract: A channel access method and apparatus are disclosed. The channel access method by an access point (AP) having a sector antenna in a wireless local access network (WLAN), may include transmitting a sector beacon with respect to any one sector among a plurality of sectors, transmitting and receiving data with at least one station in any one sector during a pre-scheduled sector interval, sequentially performing transmission of the sector beacon and transmission and reception of the data with respect to remaining sectors of the plurality of sectors excluding the any one sector, transmitting an omni beacon with respect to all of the plurality of sectors, and transmitting and receiving data with respect to at least one station of the plurality of sectors during a pre-scheduled Basic Service Set (BSS) interval.

公开(公告)号：US20160197655A1

公开(公告)日：2016-07-07

申请号：US14916920

申请日：2014-09-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Seung LEE ,  Jin Hyung OH ,  Gwang Zeen KO ,  Hyun Duk KANG ,  Hyoung Jin KWON ,  Myung Sun SONG ,  Sok Kyu LEE ,  Min Ho CHEONG ,  Jae Ick CHOI

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/04

CPC classification number: H04B7/024 ,  H04B7/0452 ,  H04B7/0617 ,  H04L1/00 ,  H04L1/1685 ,  H04W48/00 ,  H04W84/12 ,  H04W88/08

Abstract: Disclosed is a communication method using interference alignment in a wireless local area network (WLAN). An access point (AP) according to one embodiment may receive first channel information between a station associated with the AP and the AP and second channel information between the station and a neighboring AP to perform interference alignment in cooperation with the AP from the station, and perform interference alignment based on the first channel information and the second channel information.

Abstract translation: 公开了一种在无线局域网（WLAN）中使用干扰对准的通信方法。 根据一个实施例的接入点（AP）可以在与AP相关联的站与AP之间接收第一信道信息，以及站与相邻AP之间的第二信道信息，以与来自站的AP协作执行干扰对准，以及 基于第一信道信息和第二信道信息执行干扰对准。

公开(公告)号：US20160073433A1

公开(公告)日：2016-03-10

申请号：US14412669

申请日：2013-07-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyoung Jin KWON ,  Jae Seung LEE ,  Min Ho CHEONG ,  Hee Jung YU ,  Jae Woo PARK ,  Sok Kyu LEE

IPC: H04W74/08 ,  H04W72/04

CPC classification number: H04W74/0891 ,  H04W74/08 ,  H04W84/12 ,  H04W88/12

Abstract: Provided is slot use control apparatus and method, including an access point (AP) to control a slotted channel access of a station (STA) in a wireless local area network (WLAN) includes generating a synchronization (synch) frame including an identification value indicating an STA allocated to a slot, and broadcasting the generated synch frame when a channel is in an idle state at a start point of the slot.

Abstract translation: 提供了一种时隙使用控制装置和方法，其包括用于控制无线局域网（WLAN）中的站（STA）的时隙信道接入的接入点（AP），包括生成同步（同步）帧，所述同步（同步）帧包括指示 分配给时隙的STA，并且当在时隙的开始点处的信道处于空闲状态时，广播所生成的同步帧。

公开(公告)号：US20150372726A1

公开(公告)日：2015-12-24

申请号：US14748000

申请日：2015-06-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min Ho CHEONG ,  Hyoung Jin KWON ,  Sok Kyu LEE ,  Jae Seung LEE

IPC: H04B7/04 ,  H04B15/00

CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04B7/0634 ,  H04B15/00

Abstract: Provided is an iterative interference alignment (IA) method and apparatus for performing a downlink multi-user multiple-input and multiple-output (DL MU-MIMO), including transmitting, to a user terminal, a transmission beamforming vector generated arbitrarily, receiving, from the user terminal, a reception beamforming vector calculated to minimize interference based on the transmission beamforming vector, and updating the transmission beamforming vector based on the reception beamforming vector, the iterative IA method may further include calculating a transmission beamforming vector space minimizing interference of an inter-basic service set based on the reception beamforming vector, calculating a transmission beamforming matrix minimizing interference of an intra-basic service set, based on the reception beamforming vector, and updating the transmission beamforming vector based on the transmission beamforming matrix and the transmission beamforming vector space.

Abstract translation: 提供了一种用于执行下行链路多用户多输入多输出（DL MU-MIMO）的迭代干扰对准（IA）方法和装置，包括：向用户终端发送任意生成的发送波束形成向量， 迭代IA方法还可以包括：计算发射波束形成向量空间，以使来自用户终端的干扰成为最小化的接收波束成形向量，并且基于接收波束形成向量来更新传输波束形成向量; 基于接收波束成形向量的基础间服务集合，基于接收波束成形向量计算最小化基内服务集合的干扰的发送波束成形矩阵，并且基于发送波束形成矩阵和发送波束成形来更新发送波束形成向量 向量空间。