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公开(公告)号：US11848807B2
公开(公告)日：2023-12-19
申请号：US17221464
申请日：2021-04-02
Inventor： Kapseok Chang , Wooyong Lee , Hyun-Kyu Chung
CPC classification number: H04L27/261 , H04L27/2613 , H04L27/2692 , H04W56/0085 , H04W72/04 , H04W84/12
Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.
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公开(公告)号：US11785600B2
公开(公告)日：2023-10-10
申请号：US17169409
申请日：2021-02-06
Inventor： Young-Jo Ko , Hyeong-Geun Park , Il-Gyu Kim , Kapseok Chang , Hyoseok Yi , Young-Hoon Kim , Seung-Chan Bang
IPC: H04W72/04 , H04J13/00 , H04W72/20 , H04L1/00 , H04L5/00 , H04L23/02 , H04L1/1607 , H04L1/1829 , H04J13/18 , H04W72/044
CPC classification number: H04W72/20 , H04J13/0048 , H04J13/18 , H04L1/003 , H04L1/0031 , H04L1/1692 , H04L1/1861 , H04L5/0017 , H04L23/02 , H04W72/0466 , H04J13/0062 , H04L1/0026 , H04L1/1607
Abstract: When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.
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13.发明授权公开(公告)号：US11563608B2
公开(公告)日：2023-01-24
申请号：US17545089
申请日：2021-12-08
Inventor： Wooram Shin , Kyeongpyo Kim , Young-Jo Ko , Kapseok Chang
Abstract: An operation method of a first communication node may include: mapping data symbols to be transmitted to a second communication node of the communication system to resources in a first two-dimensional (2D) domain; pre-processing the data symbols mapped to the resources in the first 2D domain to spread the data symbols on resources in a second 2D domain; mapping the pre-processed data symbols to the resources in the second 2D domain; and performing multi-carrier modulation on the data symbols mapped to the resources in the second 2D domain for each of the resources in the second 2D domain.
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公开(公告)号：US10484221B2
公开(公告)日：2019-11-19
申请号：US15871760
申请日：2018-01-15
Inventor： Kapseok Chang , Wooyong Lee , Hyun-Kyu Chung
Abstract: Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.
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15.发明授权公开(公告)号：US09974056B2
公开(公告)日：2018-05-15
申请号：US14705706
申请日：2015-05-06
Inventor： Kapseok Chang , Byung-Jae Kwak
CPC classification number: H04W72/0406 , H04L29/08306 , H04L67/104 , H04W4/70 , H04W4/80 , H04W28/0215 , H04W56/00 , H04W56/001 , H04W84/12
Abstract: When a transmitter transmits a first Timing Offset Indication iDentifier (TOID) of a plurality of TOIDs representing timing offset of a frame, the transmitter determines a first codeword corresponding to the first TOID of a plurality of codewords representing a subcarrier. The transmitter allocates a busy tone to a first subcarrier that the first codeword represents. The transmitter transmits the busy tone.
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Patent Agency Ranking
公开(公告)号：US09893871B2
公开(公告)日：2018-02-13
申请号：US14928270
申请日：2015-10-30
Applicant: Electronics and Telecommunications Research Institute , HANDONG GLOBAL UNIVERCITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
Inventor： Kapseok Chang , Seon-Ae Kim , Hyung Sik Ju , Youngsik Kim
CPC classification number: H04L5/14 , H04B1/0458 , H04B1/123 , H04B1/18 , H04B1/50 , H04B1/525 , H04B15/00
Abstract: Disclosed is an in-band full duplex transceiver. The in-band full duplex transceiver may include a transmitter, a hybrid transformer, and an impedance matching unit. The hybrid transformer may include a first end connected to an antenna, may output a transmitting signal to the antenna, and may output a received signal provided through the antenna to the receiver. The impedance matching unit may include balance networks connected to a second end of the hybrid transformer and matching impedance of the antenna.
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公开(公告)号：US09602233B2
公开(公告)日：2017-03-21
申请号：US13755497
申请日：2013-01-31
Inventor： Young-Jo Ko , Hyeong-Geun Park , Il-Gyu Kim , Kapseok Chang , Hyoseok Yi , Young-Hoon Kim , Seung-Chan Bag
CPC classification number: H04W72/0406 , H04J13/0048 , H04J13/0062 , H04J13/18 , H04L1/0026 , H04L1/003 , H04L1/0031 , H04L1/1607 , H04L1/1692 , H04L1/1861 , H04L5/0017 , H04L23/02 , H04W72/0466
Abstract: When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.
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公开(公告)号：US09496976B2
公开(公告)日：2016-11-15
申请号：US14792822
申请日：2015-07-07
Inventor： Il Gyu Kim , Hyeong Geun Park , Young Jo Ko , Kapseok Chang , Hyo Seok Yi , Young Hoon Kim , Seung Chan Bang
CPC classification number: H04W56/001 , H04J11/0069 , H04J11/0093 , H04L5/0037 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2655 , H04L27/2675 , H04W36/0061 , H04W36/08 , H04W56/00
Abstract: A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.
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19.发明授权公开(公告)号：US09451572B2
公开(公告)日：2016-09-20
申请号：US15014315
申请日：2016-02-03
Inventor： Sung-Geun Jin , Kapseok Chang , Hyoung Jin Kwon , Woo Yong Lee , Hyun Kyu Chung
Abstract: Disclosed is a method for adjusting a transmission time point of at least one second terminal in a wireless network by a first terminal. In the method for adjusting a transmission time point of a terminal, a transmission time point of the second terminal is set, a first frame including information regarding the transmission time point is transmitted to the second terminal, a first response frame transmitted according to the transmission time point from the second terminal is received, and the transmission time point is adjusted according to an arrival time of the first response frame.
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20.发明授权Cell search and forward link frame transmission using forward link frame structure 有权使用前向链路帧结构的小区搜索和前向链路帧传输公开(公告)号：US09113380B2
公开(公告)日：2015-08-18
申请号：US13775158
申请日：2013-02-23
Inventor： Il Gyu Kim , Hyeong Geun Park , Young Jo Ko , Kapseok Chang , Hyo Seok Yi , Young Hoon Kim , Seung Chan Bang
CPC classification number: H04W56/001 , H04J11/0069 , H04J11/0093 , H04L5/0037 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2655 , H04L27/2675 , H04W36/0061 , H04W36/08 , H04W56/00
Abstract: A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.
Abstract translation: 一种用于搜索其中多个小区被分组成多个小区组的通信系统的移动站中的小区的方法和装置，并且每个小区组包括至少两个小区。 该方法包括从接收信号检测主同步信号和次同步信号，以及基于主同步信号和次同步信号的组合来识别小区。 次同步信号与移动站所属的小区组相关，主同步信号与移动站所属小区相关。
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