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公开(公告)号：US10045240B2
公开(公告)日：2018-08-07
申请号：US15805787
申请日：2017-11-07
Inventor： Jin Hyung Oh , Bang Chul Jung , Hu Jin , Myung Sun Song
Abstract: Provided is a frame transmission method of interference alignment (IA) and controlling, the method including calculating a channel matrix of a basic service set (BSS) by measuring channel information between an access point and a user terminal, performing singular value decomposition (SVD) based on the calculated channel matrix, selecting a beamforming vector in consideration of an interference amount associated with another access point based on the SVD performed by the channel matrix, and calculating a leakage interference (LIF) value based on the selected beamforming vector.
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公开(公告)号：US09838090B2
公开(公告)日：2017-12-05
申请号：US14916920
申请日：2014-09-05
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
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.
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13.发明授权Method for interference alignment using multiple antennas in overlapped multi-cell overlapped environment 有权用于在重叠多小区重叠环境中使用多个天线进行干扰对准的方法公开(公告)号：US09385834B2
公开(公告)日：2016-07-05
申请号：US14157116
申请日：2014-01-16
Inventor： Jinhyung Oh , Gwangzeen Ko , Igor Kim , Myung Sun Song
CPC classification number: H04L1/0009 , H04B7/0456 , H04B7/086
Abstract: An interference alignment method using multiple antennas in a multi-cell overlapped environment, includes: when at least one transmission and reception ends having at least one or more antennas communicate with each other, establishing at least one or more channels from the transmission end to the reception end. Further, the interference alignment method includes designing a processing filter for a transmission signal transmitted from the transmission end to the reception ends; and designing a processing filter for a reception signal that is received by the reception end.
Abstract translation: 在多小区重叠环境中使用多个天线的干扰对准方法包括：当至少一个发送和接收结束时具有至少一个或多个天线彼此通信时，建立至少一个或多个信道从发射端至 接待端 此外，干扰对准方法包括设计从发送端发送到接收端的发送信号的处理过滤器; 以及设计用于由接收端接收的接收信号的处理滤波器。
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公开(公告)号：US09960796B2
公开(公告)日：2018-05-01
申请号：US15188045
申请日：2016-06-21
Inventor： Bong Su Kim , Min Soo Kang , Kwang Seon Kim , Woo Jin Byun , Myung Sun Song
IPC: H04B1/707 , H04B1/10 , H04B1/18 , H04B7/0452 , H04B7/08
CPC classification number: H04B1/10 , H04B1/18 , H04B7/0413 , H04B7/0452 , H04B7/08 , H04B7/0848
Abstract: Provided are a multi-input multi-output system which overcomes a disadvantage that optimal receiving performance cannot be maintained according to an installation environment and a performance change of a receiver when a receiving module is configured by using a fixed attenuator and a fixed phase in a line-of-sight multi-input multi-output system configuration and analogously controls an interference removing module of a receiver including a variable attenuator and a phase shifter which are controllable to enhance a receiving performance and increase frequency efficiency, in order to maximize a signal-to-interference ratio of each path and an operating method thereof.
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15.发明授权公开(公告)号：US09642070B2
公开(公告)日：2017-05-02
申请号：US14621523
申请日：2015-02-13
Inventor： Hyun Duk Kang , Gwang Zeen Ko , Jin Hyung Oh , Igor Kim , Myung Sun Song
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.
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Patent Agency Ranking
公开(公告)号：US09306724B2
公开(公告)日：2016-04-05
申请号：US13919543
申请日：2013-06-17
Inventor： Hyun Duk Kang , Hoi Yoon Jung , Gwang Zeen Ko , Myung Sun Song , Jae Ick Choi
CPC classification number: H04L5/06 , H04L5/0007 , H04L5/0073 , H04W16/10 , H04W16/14 , H04W28/16 , H04W72/082 , H04W74/002 , H04W84/12
Abstract: The present invention relates to an apparatus and a method for avoiding signal interference between access points (APs) in a non-license band, and more particularly, an interference avoidance apparatus and method between access points (APs) that avoid interference based on whether an overlapping basic service set (OBSS) is present, whether an overlapping operation channel between adjacent APs is used, whether it is possible to select a non-overlapping operation channel between adjacent APs, and the like.
Abstract translation: 本发明涉及一种用于避免非许可频带中的接入点（AP）之间的信号干扰的装置和方法，更具体地，涉及一种避免干扰的接入点（AP）之间的干扰避免装置和方法，所述接入点 存在重叠的基本服务集（OBSS），是否使用相邻AP之间的重叠操作信道，是否可以在相邻AP之间选择不重叠的操作信道等。
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公开(公告)号：US11160135B2
公开(公告)日：2021-10-26
申请号：US16555942
申请日：2019-08-29
Inventor： Jin Hyung Oh , Gwang Zeen Ko , Hyun Duk Kang , Igor Kim , Myung Sun Song
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).
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公开(公告)号：US11139863B2
公开(公告)日：2021-10-05
申请号：US16578100
申请日：2019-09-20
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
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.
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19.发明授权公开(公告)号：US10361889B2
公开(公告)日：2019-07-23
申请号：US15459749
申请日：2017-03-15
Inventor： Kwang Seon Kim , Min Soo Kang , Bong Su Kim , Myung Sun Song , Woo Jin Byun
IPC: H04W4/00 , H04L25/02 , H04B7/0413 , H04W24/02
Abstract: The present disclosure relates to a wireless communication apparatus capable of increasing throughput using MIMO in an LOS environment and a method for the same. A wireless communication apparatus based on the LOS-MIMO technique may comprise a multi-link configuration unit, a frequency response correction unit, a signal compensation unit, and a feedback unit. In the apparatus, an additional LOS-MIMO equalizer is used at the front of an LOS-MIMO estimator and a coding unit in order to compensate in-band frequency characteristics of frequency response characteristics estimated by the LOS-MIMO estimator and a signal channel estimator, whereby the LOS-MIMO estimation performance can be remarkably enhanced. Also, precise separation of multiplexed signals through the above-described LOS equalizer can make it possible to increase transmission capacity by using the LOS-MIMO which can be applied to high-order mode (e.g., over 16 quadrature amplitude modulation (QAM)) digital communications.
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公开(公告)号：US10045222B2
公开(公告)日：2018-08-07
申请号：US14890883
申请日：2014-05-09
Inventor： Hyun Duk Kang , Gwang Zeen Ko , Myung Sun Song
IPC: H04W16/14
Abstract: Disclosed are methods of exchanging messages necessary for interaction among entities in a coexistence management system that manages a plurality of frequency sharing devices. Specifically, a method of exchanging messages in a coexistence management system including a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) includes generating, by the CM, a ReconfigurationRequest message, sending the ReconfigurationRequest message to the CE, and waiting for a ReconfigurationResponse message from the CE. The ReconfigurationRequest message includes at least one of an operating channel list of a white space object (WSO) served by the CE, a transmission power limitation, a flag indicating whether or not a channel is shared, a transmission schedule, and channel classification information.
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