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公开(公告)号：US11044747B2
公开(公告)日：2021-06-22
申请号：US15770838
申请日：2017-02-03
Inventor： Jung Sun Um , Hoi Yoon Jung , Seung Keun Park , Sung Jin Yoo
Abstract: Disclosed is a method for scheduling an uplink transmission in a communication network. A terminal operation method comprises the steps of: detecting a control channel of a subframe #n transmitted from a base station; receiving an uplink grant from the control channel; and transmitting, to the base station, a plurality of subframes scheduled by the uplink grant. Thus, the performance of the communication network may be improved.
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公开(公告)号：US09814078B2
公开(公告)日：2017-11-07
申请号：US15065602
申请日：2016-03-09
Inventor： Seung Keun Park , Sungjin Yoo , Jung Sun Um , Hoiyoon Jung , Hyung Do Choi
CPC classification number: H04W74/085 , H04W84/12
Abstract: A wireless device of a communication system randomly selects a backoff counter at a contention window interval corresponding to a contention window size that is determined according to a backoff stage, attempts packet transmission, when the backoff counter becomes 0 while reducing the backoff counter, when a radio channel is in an idle status, and increases the contention window size while increasing the backoff stage by 1 according to a first predetermined condition. In this case, as the backoff stage increases, a contention window size has a concave down increasing form.
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13.发明授权公开(公告)号：US09214971B2
公开(公告)日：2015-12-15
申请号：US13911501
申请日：2013-06-06
Inventor： Su Na Choi , Seung Keun Park
CPC classification number: H04B1/1027
Abstract: An apparatus and method for evaluating statistical interference concerning a multi-source noise environment of an electromagnetic (EM) zone are disclosed. The apparatus for evaluating statistical interference may include a receiver to receive an EM wave in a preset frequency band, a spectrum analyzer to analyze the received EM wave and to measure interference in the preset frequency band, a frequency selector to select an interest frequency in the frequency band based on a level of the measured interference, an amplitude probability distribution (APD) measurement unit to measure an APD of an interference signal with respect to the interest frequency, and a comparator to compare the measured APD to a preset limit and to draw a probability of the limit or higher of interference occurring.
Abstract translation: 公开了一种用于评估关于电磁（EM）区域的多源噪声环境的统计干扰的装置和方法。 用于评估统计干扰的装置可以包括：接收器，用于接收预置频带中的EM波;频谱分析器，用于分析所接收的EM波并测量预置频带中的干扰;频率选择器，用于在 基于所测量的干扰水平的频带，用于测量相对于兴趣频率的干扰信号的APD的幅度概率分布（APD）测量单元，以及将测量的APD与预设极限进行比较并绘制 干扰发生的极限或更高的概率。
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公开(公告)号：US12262393B2
公开(公告)日：2025-03-25
申请号：US18635345
申请日：2024-04-15
Inventor： Jung Sun Um , Hoiyoon Jung , Seung Keun Park , Sungjin Yoo
IPC: H04W72/23 , H04L5/00 , H04L27/00 , H04L27/26 , H04W16/14 , H04W72/0446 , H04L25/02 , H04W74/0808 , H04W84/12
Abstract: Disclosed herein is a method for transmitting, by a terminal, a sounding reference signal (SRS). The terminal receives a grant for uplink multiple subframes from a base station. The terminal determines a first subframe for an SRS transmission of the terminal among the uplink multiple subframes on the basis of SRS transmission position information received from the base station. Further, the terminal transmits the SRS in the first subframe.
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公开(公告)号：US11722907B2
公开(公告)日：2023-08-08
申请号：US17318099
申请日：2021-05-12
Inventor： Jung Sun Um , Bong-Su Kim , Igor Kim , Seung Keun Park
IPC: H04W16/14 , H04W48/02 , H04W72/0453 , H04W52/24 , H04W72/541
CPC classification number: H04W16/14 , H04W48/02 , H04W52/242 , H04W72/0453 , H04W72/541
Abstract: Provided is a method and apparatus for determining an operating condition for frequency coexistence and an operating condition determining method includes a method of calculating and transferring an inference-free available frequency and an output level to an existing radio station that operates and needs to be protected or a method of calculating a channel access parameter for sharing a frequency with a heterogeneous device, a network, or a system.
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Patent Agency Ranking
公开(公告)号：US11553426B2
公开(公告)日：2023-01-10
申请号：US17115404
申请日：2020-12-08
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
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.
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公开(公告)号：US10897739B2
公开(公告)日：2021-01-19
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
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.
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公开(公告)号：US10110428B2
公开(公告)日：2018-10-23
申请号：US15274553
申请日：2016-09-23
Inventor： Jung Sun Um , Sungjin Yoo , Hoiyoon Jung , Seung Keun Park
Abstract: A communication node configures an unlicensed band transmission burst including a plurality of subframes in consideration of an occupancy state of a channel of an unlicensed band and transmits the unlicensed band transmission burst through the unlicensed band. In this case, at least one subframe of the plurality of subframes has a different type from the remaining subframes.
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公开(公告)号：US09831995B2
公开(公告)日：2017-11-28
申请号：US14931551
申请日：2015-11-03
Inventor： Sung Hyun Hwang , Seung Keun Park , Hyung Do Choi
IPC: H04K1/10 , H04L27/28 , H04L5/00 , H04L27/26 , H04B7/0413
CPC classification number: H04L5/0048 , H04B7/0413 , H04L5/0007 , H04L5/0023 , H04L27/2613
Abstract: Disclosed are a method for generating a pilot pattern and an apparatus thereof. The method for generating a pilot pattern for MIMO antennas includes: determining a size of a slot that is an interval where a pilot pattern is repeated in a time domain and a frequency domain; determining a pilot inserting position of OFDMA symbols included in a slot determined for a first antenna; and determining a pilot inserting position of OFDMA symbols included in a slot determined for a second antenna, in order to have a sub-carrier different from a sub-carrier of the pilot inserting position of the OFDMA symbols included in the slot determined for the first antenna.
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20.发明授权Apparatus and method for analyzing distribution of electromagnetic wave in radio wave system 有权用于分析无线电波系统中电磁波分布的装置和方法公开(公告)号：US09377494B2
公开(公告)日：2016-06-28
申请号：US13727016
申请日：2012-12-26
Inventor： Sung Woong Choi , Hyo Joon Eom , Sang Bong Jeon , Seung Keun Park , Jun Cheol Park
CPC classification number: G01R29/0814 , G01R29/0821
Abstract: Disclosed are an apparatus and a method for analyzing a distribution of electromagnetic waves using a 4-port transverse electromagnetic (TEM) cell in a radio wave system. The apparatus for analyzing a distribution of electromagnetic waves in a radio wave system includes: an input unit configured to apply a reference electrostatic potential to an inside of a 4-port transverse electromagnetic (TEM) cell in which electronic devices are located; a calculation unit configured to calculate electrostatic potentials inside the 4-port TEM cell using a mode matching scheme; an analysis unit configured to analyze the distribution of electromagnetic waves inside the 4-port TEM cell through the electrostatic potentials inside the 4-port TEM cell; and an output unit configured to output the distribution of electromagnetic waves inside the 4-port TEM cell.
Abstract translation: 公开了一种利用无线电波系统中的4端口横向电磁（TEM）单元分析电磁波分布的装置和方法。 用于分析无线电波系统中的电磁波分布的装置包括：输入单元，被配置为将参考静电电位施加到电子设备所在的4端口横向电磁（TEM）单元的内部; 计算单元，被配置为使用模式匹配方案来计算所述4端口TEM单元内的静电电位; 分析单元，被配置为通过所述4端口TEM单元内的静电电位来分析所述4端口TEM单元内部的电磁波的分布; 以及输出单元，其被配置为输出所述4端口TEM单元内的电磁波分布。
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