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公开(公告)号：US11696222B2
公开(公告)日：2023-07-04
申请号：US17313984
申请日：2021-05-06
Inventor： Sung Hyun Hwang , Igor Kim , Seung Keun Park
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.
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公开(公告)号：US11567184B2
公开(公告)日：2023-01-31
申请号：US16550086
申请日：2019-08-23
Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
Inventor： Sung Hyun Hwang , Woo Jin Byun , Sung Jin Yoo , Jae Hyun Park
IPC: G01S13/58 , G01S13/93 , G01S7/35 , G01S13/931
Abstract: An operation method performed by an apparatus for detecting multiple targets may comprise transmitting first signals using Mt transmit antennas included in the apparatus; receiving the first signals reflected by the multiple targets through Mr receive antennas included in the apparatus; generating a first function for estimating a velocity and an azimuth of each of the multiple targets using the first signals and the reflected first signals; estimating a velocity and an azimuth that maximize a result of the first function as a velocity and an azimuth of a first target closest to the apparatus among the multiple targets; generating a second function by cancelling interference caused by the first target from the first function; and estimating a velocity and an azimuth that maximize a result of the second function as a velocity and an azimuth of a second target among the multiple targets.
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Patent Agency Ranking
公开(公告)号：US11172448B2
公开(公告)日：2021-11-09
申请号：US16612329
申请日：2018-05-08
Inventor： Sung Hyun Hwang , Seung Keun Park , Yong Ho Kim
Abstract: An operation method of a communication node for supporting a low power mode in a wireless LAN is disclosed. A method for operating an access point comprises: a step of transmitting a CTS frame to protect transmission of a wake-up packet, a step of transmitting the wake-up packet to wake up a station including PCR and WURx; and a step of transmitting a data frame to the station. Therefore, the performance of the communication system can be improved.
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公开(公告)号：US11153818B2
公开(公告)日：2021-10-19
申请号：US16341857
申请日：2017-10-12
Inventor： Sung Hyun Hwang , Igor Kim , Seung Keun Park
IPC: H04W52/04 , H04W52/02 , H04L5/00 , H04L12/24 , H04W12/069 , H04W84/12 , H04W88/08 , H04W12/73 , H04W12/76
Abstract: Disclosed are a method and an apparatus for initial negotiation in a wireless LAN. An operating method of a station in a communication system comprises the steps of: generating a probe request frame including WUR capability information of the station which supports a WUR mode; transmitting the probe request frame; and receiving a probe response frame from an access point having received the probe request frame. Therefore, the performance of the communication system can be improved.
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公开(公告)号：US11032758B2
公开(公告)日：2021-06-08
申请号：US16331123
申请日：2017-09-06
Inventor： Sung Hyun Hwang , Igor Kim , Seung Keun Park
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.
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公开(公告)号：US10701752B2
公开(公告)日：2020-06-30
申请号：US15562005
申请日：2016-01-28
Inventor： Jung Sun Um , Kyu Min Kang , Seung Keun Park , Jae Cheol Park , Sung Jin Yoo , Dong Hun Lee , Hoi Yoon Jung , Su Na Choi , Sung Hyun Hwang
Abstract: The present invention relates to a device and method for allocating a coexistence resource in an unlicensed band. The device according to the present invention comprises: a frame configuration unit for configuring a subframe in which data and a reference signal for a channel in an unlicensed band are allocated, and allocating a part of the symbols of the subframe as a coexistence resource; a signal detection unit for detecting a signal of another LTE system or Wi-Fi system during a transmission idle period where the coexistence resource is allocated; and a transmission processing unit which, when the signal of another system is detected during the transmission idle period, does not occupy a resource for the next subframe, and when the occupation of the coexistence resource by the another system has ended, occupies the resource for the next subframe.
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公开(公告)号：US09706370B2
公开(公告)日：2017-07-11
申请号：US14394416
申请日：2013-04-16
Inventor： Sung Hyun Hwang , Byung Jang Jeong , Gwang Zeen Ko , Frangklin A Antony
CPC classification number: H04W4/06 , H04W72/048 , Y02D70/20
Abstract: Provided is an apparatus and method for managing a backup channel for cognitive radio communication that may group at least one device included in a cell served by a base station, and allocate backup channels for cognitive radio communication to the groups, based on location information and mobility of the groups.
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