公开(公告)号：US12294414B2

公开(公告)日：2025-05-06

申请号：US18003955

申请日：2020-07-02

Applicant: LG ELECTRONICS INC.

Inventor： Byungkyu Ahn ,  Sangrim Lee ,  Hojae Lee ,  JaYeong Kim

IPC: H04B10/70

Abstract: The present specification provides a method and a device, the method, performed by a device, for transmitting a first pulse train in a quantum communication system being characterized by: receiving a random access (RA) preamble from another device; transmitting an RA response (RAR) to the other device as a response to the RA preamble; performing a radio resource control (RRC) connection process with the other device; receiving data from the other device; and decoding the data on the basis of key information, wherein a first pulse train is generated in a laser diode of the device, and the key information is determined on the basis that the first pulse train passes through both a first path and a second path and is then transmitted from the device to the other device via a quantum channel.

公开(公告)号：US20250068957A1

公开(公告)日：2025-02-27

申请号：US18726776

申请日：2022-12-28

Applicant: LG ELECTRONICS INC.

Inventor： Jayeong Kim ,  Sangrim Lee ,  Hojae Lee ,  Byungkyu Ahn

IPC: G06N10/70 ,  G06N10/40

Abstract: Provided is an operation method of a first node in a communication system, according to various embodiments of the present disclosure, the method comprising the steps of: receiving one or more synchronization signals from a second node; receiving system information from the second node; identifying, for a bit flip channel, a bit correlation of a first number of n first qubits constituting an entanglement state between the first node and the second node; generating, on the basis of the bit correlation, a second number of n−1 auxiliary qubits; after an interaction with respect to the bit flip channel occurs, determining, on the basis of the second number of n−1 auxiliary qubits, whether a bit flip error has occurred with respect the entanglement state; and, if the bit flip error is determined to have occurred, carrying out error correction by means of a bit flip operation for the first qubits.

公开(公告)号：US12218789B2

公开(公告)日：2025-02-04

申请号：US18000352

申请日：2020-06-01

Applicant: LG ELECTRONICS INC.

Inventor： Hojae Lee ,  Sangrim Lee ,  Bonghoe Kim ,  Sunam Kim ,  Kijun Jeon ,  Byungkyu Ahn

IPC: H04L27/26 ,  H04B10/11 ,  H04B10/40 ,  H04L7/00

Abstract: The present specification provides a method, performed by a device, for transmitting information about a pencil beam timing offset in a wireless optical communication system, in which a reference synchronization time is obtained, wherein the reference synchronization time is obtained on the basis of a cell-reference synchronization signal (C-RSS) received from another device, a peak energy time is obtained, the pencil beam timing offset is obtained on the basis of the reference synchronization time and the peak energy time, and information about the pencil beam timing offset is transmitted to the other device.

公开(公告)号：US12184459B2

公开(公告)日：2024-12-31

申请号：US17767025

申请日：2019-10-07

Applicant: LG ELECTRONICS INC.

Inventor： Sangrim Lee ,  Hojae Lee

IPC: H04L27/227 ,  H04L5/00 ,  H04L27/20

Abstract: Disclosed are a multi-layer transmission and reception method in a communication system based on 1-bit quantization in a wireless communication system, and an apparatus for supporting same. Particularly, a method by which a first device transmits and receives a signal in a wireless communication system comprises the steps of: receiving a reference signal (RS) from a second device; generating a demodulation reference vector on the basis of the RS; and receiving a data signal from the second device by using the demodulation reference vector, wherein the RS can be generated differently according to the modulation of the data signal.

公开(公告)号：US12068777B2

公开(公告)日：2024-08-20

申请号：US17918523

申请日：2020-04-29

Applicant: LG ELECTRONICS INC.

Inventor： Hojae Lee ,  Sangrim Lee

IPC: H04B10/00 ,  H04B10/079 ,  H04B10/112 ,  H04B10/2507 ,  H04B10/85 ,  H04J14/00

CPC classification number: H04B10/0795 ,  H04B10/112 ,  H04B10/2507 ,  H04B10/85

Abstract: A method and apparatus for transmitting and receiving signals in a wireless communication system, according to an embodiment of the present invention, may comprise a feature of applying a phase pattern to a wavefront of an optical signal and a feature of transmitting the optical signal. The phase pattern may be determined on the basis of an optical phase shift characteristic of a phase mask, and the phase mask may be determined on the basis of a quantization order and a phase order.

公开(公告)号：US12045721B2

公开(公告)日：2024-07-23

申请号：US17496866

申请日：2021-10-08

Applicant: LG Electronics Inc. ,  The University of Hong Kong

Inventor： Kijun Jeon ,  Kaibin Huang ,  Dingzhu Wen ,  Sangrim Lee ,  Sungjin Kim

IPC: H04L41/16 ,  G06N3/08 ,  H04W24/02 ,  H04W24/10

CPC classification number: G06N3/08 ,  H04L41/16 ,  H04W24/02 ,  H04W24/10

Abstract: In a neural network (NN) based wireless communication system, a BS determines, for an one-round latency T and an overall model size L of the NN model, i) Tu that makes {circumflex over (L)}*(Tu) larger than L and ii) Tl that makes {circumflex over (L)}*(Tl)

公开(公告)号：US12034479B2

公开(公告)日：2024-07-09

申请号：US17773989

申请日：2019-11-04

Applicant: LG Electronics Inc.

Inventor： Hojae Lee ,  Sangrim Lee ,  Byounghoon Kim

IPC: H04B10/11

CPC classification number: H04B10/11

Abstract: Proposed is a receiving UE for receiving a signal in optical wireless communication, according to the present disclosure. The receiving UE may include: a transceiver for receiving an optical signal of an orbital angular momentum (OAM) mode from a transmitting terminal; a demodulator composed of at least one phase shifter; a photoelectricity converter composed of at least one photodiode; and a processor connected to the transceiver, the demodulator, and the photoelectricity converter. In addition, the at least one phase shifter may convert an optical signal of the OAM mode into an optical signal of a Gaussian mode, and the at least one photodiode may convert an optical signal of the Gaussian mode into an electrical signal.

公开(公告)号：US20230275729A1

公开(公告)日：2023-08-31

申请号：US18014667

申请日：2020-07-10

Applicant: LG ELECTRONICS INC. ,  Korea Advanced Institute of Science and Technology

Inventor： Seungwon Keum ,  Jaehoon Chung ,  Sangrim Lee ,  Dongho Cho ,  Juyong Lee ,  Sangmi Noh ,  Dangoh Kim ,  Seongjae Kim

IPC: H04L5/00 ,  H04W74/08 ,  H04L27/26

CPC classification number: H04L5/0051 ,  H04W74/0833 ,  H04L27/261 ,  H04L27/2605

Abstract: A method for estimating a phase noise by a wireless device in a wireless communication system according to an embodiment of the present disclosure comprises the steps of: receiving a pre-configured pilot signal and a phase tracking reference signal (PTRS); calculating a first phase noise on the basis of the pre-configured pilot signal; calculating a common phase error (CPE) on the basis of the phase tracking reference signal (PTRS); and estimating a phase noise (PN) on the basis of the first phase noise and the common phase error (CPE). The PN is estimated through interpolation based on a specific reference point, and the specific reference point is based on the first phase noise and the CPE.

公开(公告)号：US11716188B2

公开(公告)日：2023-08-01

申请号：US17505390

申请日：2021-10-19

Applicant: LG ELECTRONICS INC.

Inventor： Eunjong Lee ,  Jaehoon Chung ,  Genebeck Hahn ,  Jinmin Kim ,  Kukheon Choi ,  Kwangseok Noh ,  Sangrim Lee

IPC: H04L5/00 ,  H04L5/14 ,  H04L1/00 ,  H04W72/1273 ,  H04W72/23 ,  H04W72/04 ,  H04W52/34 ,  H04W72/0446

CPC classification number: H04L5/0087 ,  H04L1/00 ,  H04L5/001 ,  H04L5/0092 ,  H04L5/14 ,  H04W72/04 ,  H04W72/1273 ,  H04W72/23 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/0053 ,  H04W52/34 ,  H04W72/0446

Abstract: A method for receiving downlink data by the terminal in a wireless communication system, includes receiving, from a base station, downlink control information for scheduling a short physical downlink shared channel (sPDSCH) on a short physical downlink control channel (sPDCCH), and receiving, from the base station, downlink data on the sPDSCH based on the downlink control information. Here, the sPDCCH and the sPDSCH are based on a first transmission time interval (TTI)-based radio frame structure, wherein the first TTI-based radio frame structure is shorter in time than a second TTI-based radio frame structure related to (i) a physical downlink shared channel (PDSCH) and (ii) a physical downlink control channel (PDCCH). Further, a number of resource element groups (REGs) consisting of a control channel element (CCE) related to the sPDCCH is smaller than a number of resource element groups (REGs) composed of a CCE related to the PDCCH.

公开(公告)号：US20220385360A1

公开(公告)日：2022-12-01

申请号：US17773989

申请日：2019-11-04

Applicant: LG Electronics Inc.

Inventor： Hojae Lee ,  Sangrim Lee ,  Byounghoon Kim

IPC: H04B10/11

Abstract: Proposed is a receiving UE for receiving a signal in optical wireless communication, according to the present disclosure. The receiving UE may include: a transceiver for receiving an optical signal of an orbital angular momentum (OAM) mode from a transmitting terminal; a demodulator composed of at least one phase shifter; a photoelectricity converter composed of at least one photodiode; and a processor connected to the transceiver, the demodulator, and the photoelectricity converter. In addition, the at least one phase shifter may convert an optical signal of the OAM mode into an optical signal of a Gaussian mode, and the at least one photodiode may convert an optical signal of the Gaussian mode into an electrical signal.