公开(公告)号：US20210266825A1

公开(公告)日：2021-08-26

申请号：US17313984

申请日：2021-05-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung Hyun HWANG ,  Igor KIM ,  Seung Keun PARK

IPC: H04W48/16 ,  H04W52/02 ,  H04W48/10 ,  H04W84/12

Abstract: A method and a device for searching for an access point in a wireless LAN are disclosed. An operating method of a station comprising a PCR and a WUR comprises the steps of: allowing the WUR operating in a wake up state to receive a WUR beacon frame from an access point; shifting an operating state of the PCR from a sleep state to the wake up state, when the WUR beacon frame is received; and allowing the PCR operating in the wake up state to communicate with the access point. Therefore, the performance of a communication system can be improved.

公开(公告)号：US20210127282A1

公开(公告)日：2021-04-29

申请号：US17072478

申请日：2020-10-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Sun UM ,  Seung Keun PARK ,  Bong-Su KIM ,  Igor KIM

IPC: H04W24/08 ,  H04L5/00 ,  H04W72/12

Abstract: A resource usage measuring method and an apparatus performing the same. The resource usage measuring method includes measuring a resource usage in a frequency domain based on a demodulation reference signal (DM-RS) transmitted from a base station, and measuring a resource usage in a time domain based on the DM-RS.

公开(公告)号：US20190191376A1

公开(公告)日：2019-06-20

申请号：US16327801

申请日：2017-08-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  KOREA NATIONAL UNIVERSITY OF TRANSPORTATION INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Yong Ho KIM ,  Sung Hyun HWANG ,  Igor KIM ,  Seung Keun PARK

IPC: H04W52/02 ,  H04W74/06

CPC classification number: H04W52/0229 ,  H04W52/02 ,  H04W74/00 ,  H04W74/06 ,  H04W74/08 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/14

Abstract: Disclosed is a method for operating a communication node supporting a low power mode in a wireless LAN. A method for operating a station, which includes a PCR and a WURx, comprises the steps of: allowing the WURx, which operates in a wake-up state, to receive a wake-up packet from an access point; transitioning an operating state of the PCR from a sleep state to the wake-up state when the wake-up packet is received; allowing the PCR, which operates in the wake-up state, to receive a data frame from an access point; and allowing the PCR to transmit, to the access point, a response to the data frame.

公开(公告)号：US20180027608A1

公开(公告)日：2018-01-25

申请号：US15722492

申请日：2017-10-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jin Hyung OH ,  Gwang Zeen KO ,  Hyun Duk KANG ,  Igor KIM ,  Myung Sun SONG

IPC: H04W80/02 ,  H04L1/18 ,  H04W72/00 ,  H04W84/12 ,  H04W28/06

CPC classification number: H04W80/02 ,  H04L1/1861 ,  H04W28/06 ,  H04W72/00 ,  H04W84/12

Abstract: Provided are a frame transmission method performed in an access point (AP), a frame reception method performed in a terminal, and an AP. The frame transmission method performed in an AP includes acquiring a channel for transmitting a first data unit of a first terminal, when a data unit to be transmitted to at least one terminal other than the first terminal is in the AP, generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including the first data unit and the data unit to be transmitted to the at least one terminal, and transmitting the PPDU to the first terminal and the at least one terminal. Accordingly, it is possible to improve the performance of a wireless local area network (WLAN).

公开(公告)号：US20150341847A1

公开(公告)日：2015-11-26

申请号：US14621523

申请日：2015-02-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Duk KANG ,  Gwang Zeen KO ,  Jin Hyung OH ,  Igor KIM ,  Myung Sun SONG

IPC: H04W48/16

CPC classification number: H04W48/16 ,  H04W24/02 ,  H04W84/12

Abstract: Disclosed are a method for avoiding interference in a wireless local area network system and an apparatus for performing the same. The method for avoiding interference by an access point in a wireless local area network system, includes receiving channel scan results from a station associated with the access point; setting connection with an adjacent access point based on the channel scan results; determining an access point to be associated with the station through negotiation with the adjacent access point; and transmitting a reassociation request message to request reassociation with the adjacent access point to the station when the negotiation with the adjacent access point succeeds.

Abstract translation: 公开了一种避免无线局域网系统中的干扰的方法及其执行装置。 用于避免无线局域网系统中的接入点的干扰的方法包括从与接入点相关联的站接收信道扫描结果; 根据频道扫描结果设置与相邻接入点的连接; 通过与所述相邻接入点协商来确定与所述站相关联的接入点; 以及当与相邻接入点的协商成功时，发送重新关联请求消息以请求与所述站的相邻接入点的重新关联。

公开(公告)号：US20150110045A1

公开(公告)日：2015-04-23

申请号：US14508006

申请日：2014-10-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Gwang Zeen KO ,  Hyun Duk KANG ,  Jin Hyung OH ,  Igor KIM ,  Myung Sun SONG

IPC: H04W72/08

CPC classification number: H04W72/085 ,  H04W72/0453

Abstract: Provided is a communication device and a method of allocating a partial band to avoid interference in the partial band, wherein the method includes extracting at least one partial band in which interference occurs from a plurality of partial bands constituting an operating channel of a user terminal, determining an available partial band aside from the extracted partial band, and allocating the determined partial band to the user terminal.

Abstract translation: 提供了一种分配部分频带以避免部分频带中的干扰的通信装置和方法，其中，该方法包括从构成用户终端的操作信道的多个部分频带中提取干扰发生的至少一个部分频带， 确定除了所提取的部分频带之外的可用的部分频带，以及将确定的部分频带分配给用户终端。

公开(公告)号：US20180138995A1

公开(公告)日：2018-05-17

申请号：US15811402

申请日：2017-11-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kyu-Min KANG ,  Jae-Cheol PARK ,  Seung-Keun PARK ,  Sung-Jin YOO ,  Hye-Yeon KWON ,  Yun-Bae KIM ,  Igor KIM ,  Jung-Sun UM ,  Young-Hwan LEE ,  Hoi-Yoon JUNG ,  Su-Na CHOI ,  Hyung-Do CHOI ,  Sung-Hyun HWANG

IPC: H04B17/345 ,  H04B3/46

CPC classification number: H04B17/345 ,  H04B3/46 ,  H04B17/14

Abstract: Disclosed herein are an apparatus and method for measuring a broadband Passive Intermodulation Distortion (PIMD) signal. The apparatus for measuring a broadband PIMD signal includes a Radio Frequency (RF) processing unit for combining one or more transmission signals into a single output signal and transmitting the output signal to a feeder so as to measure a PIMD signal and for generating a beat frequency signal using the PIMD signal received from the feeder, and a digital processing unit for transferring a control signal required so as to control the RF processing unit, receiving the beat frequency signal, and then measuring a location of a passive element in the feeder in which the PIMD signal has been generated by performing digital signal processing on the beat frequency signal.

公开(公告)号：US20170347312A1

公开(公告)日：2017-11-30

申请号：US15529013

申请日：2015-11-20

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Duk KANG ,  Gwang Zeen KO ,  Igor KIM ,  Myung Sun SONG

IPC: H04W48/16 ,  H04W88/10 ,  H04W28/16 ,  H04W84/12

CPC classification number: H04W48/16 ,  H04W28/16 ,  H04W84/12 ,  H04W88/10

Abstract: The present invention relates to a method and a system for discovering an adjacent access point between multi-band wireless LAN access points, and to a method and a system for discovering an adjacent neighboring access point between access points in order to solve an interference problem between the access points in a wireless LAN using multi-bands.

公开(公告)号：US20150245359A1

公开(公告)日：2015-08-27

申请号：US14445439

申请日：2014-07-29

Applicant: Electronics and Telecommunications Research Institute

Inventor： Igor KIM ,  Gwang Zeen KO ,  Jin Hyung OH ,  Hyun Duk KANG ,  Myung Sun SONG

IPC: H04W72/06 ,  H04W24/10 ,  H04L1/00 ,  H04W72/08

CPC classification number: H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0034 ,  H04W24/10 ,  H04W28/22

Abstract: A method and apparatus of selecting a transmission rate in a wireless transmission system are provided. The method of selecting a transmission rate by a transmission rate selecting apparatus may comprise assigning a weight to each of criteria for selecting a transmission rate per service class, calculating a score for each transmission rate per service class using statistics information collected for a plurality of transmission rates based on the weight-assigned criteria, and selecting a transmission rate for a service class based on the calculated score.

Abstract translation: 提供了一种在无线传输系统中选择传输速率的方法和装置。 由传输速率选择装置选择传输速率的方法可以包括：为每个服务等级选择传输速率的标准分配权重，使用针对多个传输收集的统计信息来计算每个业务类别的每个传输速率的得分 基于权重分配标准的费率，以及基于所计算的分数来选择服务等级的传输速率。

公开(公告)号：US20150188733A1

公开(公告)日：2015-07-02

申请号：US14272973

申请日：2014-05-08

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jinhyung OH ,  Gwangzeen KO ,  Igor KIM ,  Myung Sun SONG ,  Hyun Ho LEE ,  Myeong Jin KIM ,  Young Chai KO

IPC: H04L25/03 ,  H04L25/02

CPC classification number: H04L25/0391 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/0632 ,  H04L25/0202 ,  H04L25/021 ,  H04L25/0242 ,  H04L25/03955

Abstract: Disclosed is a method for removing signal interference in a MIMO-based interference removing apparatus including transmitting a reference signal to at least one receiver; if channel information is estimated by the receiver, receiving the estimated channel information from the receiver as a feedback signal; and producing transmission pre-coding matrix, beam forming matrix, and weighted matrix using the received channel information. Further, the method includes transmitting information containing the transmission pre-coding matrix, the beam forming matrix, and the weighted matrix by including them in a pilot signal to the receiver, and the MIMO-based interference removing apparatus comprises at least one transmitter.

Abstract translation: 公开了一种在基于MIMO的干扰去除装置中消除信号干扰的方法，包括：向至少一个接收机发送参考信号; 如果接收机估计信道信息，则从接收机接收所估计的信道信息作为反馈信号; 并使用所接收的信道信息产生传输预编码矩阵，波束形成矩阵和加权矩阵。 此外，该方法包括通过将包含发送预编码矩阵，波束形成矩阵和加权矩阵的信息包括在导频信号中而发送到接收机，并且基于MIMO的干扰去除装置包括至少一个发射机。