公开(公告)号：US20250038845A1

公开(公告)日：2025-01-30

申请号：US18696680

申请日：2021-09-29

Applicant: LG Electronics Inc.

Inventor： Byungkyu AHN ,  Sangrim LEE ,  Hojae LEE

IPC: H04B10/079 ,  G06N10/70 ,  H04B10/70 ,  H04B10/85

Abstract: The present disclosure relates to a quantum communication system, and specifically to a method and a device for the method, wherein the method comprises the steps of: acquiring configuration information about a quantum signal used for quantum communication; receiving, through a quantum channel, a first block sequence which includes a plurality of first single photons that correspond to the quantum signal, and generating a plurality of second single photons on the basis of the configuration information; inputting, to a beam splitter (BS), the first and second single photons which correspond to each other; and determining whether there is an error in the quantum channel on the basis of the number of detection paths of photons output from the beam splitter.

公开(公告)号：US20250030487A1

公开(公告)日：2025-01-23

申请号：US18712923

申请日：2021-11-23

Applicant: LG Electronics Inc.

Inventor： Byungkyu AHN ,  Sangrim LEE ,  Hojae LEE

IPC: H04B10/70 ,  H04B10/532 ,  H04B10/548

Abstract: In order to perform quantum secure direct communication using a high-dimensional quantum state quantum state based on polarization and phase information, a method performed by a first device in a communication system may comprise establishing a classic channel with a second device using a random access (RA) preamble and an RA response (RAR) message, receiving a forward pulse including photons in an initial quantum state from the second device, and transmitting a backward pulse representing a plurality of bits per photon by performing phase modulation and polarization modulation on the photons based on assistance of the classic channel

公开(公告)号：US20240056293A1

公开(公告)日：2024-02-15

申请号：US18266799

申请日：2021-11-12

Applicant: LG ELECTRONICS INC.

Inventor： Jayeong KIM ,  Byoung Hoon KIM ,  Hojae LEE ,  Sangrim LEE ,  Byungkyu AHN

IPC: H04L9/08 ,  H04W12/041

CPC classification number: H04L9/0852 ,  H04W12/041

Abstract: A communication system supporting quantum key distribution is disclosed. A method performed by a first device comprises transmitting or receiving a random access (RA) preamble to or from a second device, receiving or transmitting a random access response (RAR) message from or to the second device as a response to the RA preamble, performing a radio resource control (RRC) connection procedure with the second device, generating a sift key for communication with the second device and performing communication through a radio channel with the second device using the sift key.

公开(公告)号：US20240039641A1

公开(公告)日：2024-02-01

申请号：US18014052

申请日：2020-07-02

Applicant: LG ELECTRONICS INC.

Inventor： JaYeong KIM ,  Byungkyu AHN ,  Sangrim LEE ,  Hojae LEE

IPC: H04B10/70 ,  H04B10/077 ,  H04L9/08

CPC classification number: H04B10/70 ,  H04B10/077 ,  H04L9/0852

Abstract: Provided are a device and a method performed by the device to correct an error in a quantum communication system. The method is characterized by comprising: transmitting a random access (RA) preamble to another device; receiving a random access response (RAR) from the other device as a response to the RA preamble; performing a radio resource control (RRC) connection procedure with the other device; and transmitting data to the other device, wherein the data is encoded on the basis of key information, the error is measured on the basis of a test pulse, and the key information is distributed to the device and the other device on the basis of the error being corrected using an improved Faraday rotator mirror of the device.

公开(公告)号：US20230353247A1

公开(公告)日：2023-11-02

申请号：US18025767

申请日：2020-09-16

Applicant: LG ELECTRONICS INC.

Inventor： Hojae LEE ,  Sangrim LEE ,  Kijun JEON ,  JaYeong KIM ,  Byungkyu AHN

IPC: H04B10/50 ,  H04B10/548 ,  H04B10/564

CPC classification number: H04B10/504 ,  H04B10/548 ,  H04B10/564

Abstract: The present specification provides a method, performed by an apparatus, for transmitting at least one beam in a wireless communication system, the method comprising transmitting the at least one beam to another apparatus and receiving information about a result of measuring the at least one beam from the other apparatus, wherein the at least one beam is a beam generated on the basis of a signal synthesized from a laser signal being incident on a meta surface from a power controller, the laser signal consists of a plurality of frequency components, the synthesized signal is a signal in which power amplification is applied to each of the plurality of frequency components, and the power amplification is applied on the basis of the intensity regarding each of the plurality of frequency components.