公开(公告)号：US10104627B2

公开(公告)日：2018-10-16

申请号：US15516606

申请日：2016-02-23

Applicant: LG ELECTRONICS INC.

Inventor： Kukheon Choi ,  Hyunsoo Ko ,  Kwangseok Noh ,  Dongkyu Kim ,  Sangrim Lee

IPC: H04B7/00 ,  H04W56/00 ,  H04W74/08

Abstract: A method for performing uplink synchronization by a terminal in a millimeter wave (mmWave)-based wireless communication system according to an embodiment of the present invention comprises the steps of: repeatedly transmitting a first type random access preamble through a plurality of coarse beams that are sequentially formed for different directions; performing a first timing advance (TA) adjustment on the basis of a response of a base station with respect to a repeated transmission of the first type random access preamble; and transmitting a second type random access preamble through at least one fine beam having a smaller beam width than the coarse beams, wherein the sequence of the second type random access preamble transmitted after the first TA adjustment is configured to be shorter than the sequence of the first type random access preamble on the time axis.

公开(公告)号：US10084521B2

公开(公告)日：2018-09-25

申请号：US15029194

申请日：2014-11-04

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo Ko ,  Jaehoon Chung ,  Jiwon Kang ,  Ilmu Byun ,  Kilbom Lee

IPC: H04L5/00 ,  H04B7/06 ,  H04B7/0452 ,  H04W72/04

CPC classification number: H04B7/0617 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/0691 ,  H04B7/0695 ,  H04L5/0023 ,  H04L5/0048 ,  H04W72/0413

Abstract: The present invention relates to a wireless communication system. A method for transmitting a signal from a base station in a wireless communication system supporting multiuser-multiple input and multiple output (MU-MIMO), according to one embodiment of the present invention, comprises the steps of: generating beams of subgroups including a plurality of terminals using analog beamforming; differentiating signals transmitted to each of the terminals using digital beamforming; and transmitting, to the terminals, signals generated based on analog beamforming and digital beamforming, wherein the weight of analog beamforming may be determined based on channel state information obtained through an uplink reference signal.

公开(公告)号：US10070427B2

公开(公告)日：2018-09-04

申请号：US15704915

申请日：2017-09-14

Applicant: LG ELECTRONICS INC.

Inventor： Seunghee Han ,  Jaehoon Chung ,  Hyunwoo Lee ,  Moonil Lee ,  Hyunsoo Ko

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04L1/00 ,  H04L1/16 ,  H04B7/0413

Abstract: The present invention relates to a wireless communication system. In more detail, in relation to a method for a terminal to transmit ACK/NACK in a wireless communication system, an ACK/NACK transmission method includes: receiving at least one Physical Downlink Shared Channel (PDSCH); transmitting at least one ACK/NACK corresponding to the at least one PDSCH through a plurality of Physical Uplink Control Channel (PUCCH) formats; and, when the at least one ACK/NACK is transmitted using a first PUCCH format, transmitting at least one ACK/NACK in an antenna port transmission mode set for a second PUCCH format.

公开(公告)号：US10028228B2

公开(公告)日：2018-07-17

申请号：US15230303

申请日：2016-08-05

Applicant: LG ELECTRONICS INC.

Inventor： Kwangseok Noh ,  Dongkyu Kim ,  Hyunsoo Ko ,  Sangrim Lee ,  Hojae Lee

IPC: H04L5/14 ,  H04W52/14 ,  H04W52/32 ,  H04W52/24 ,  H04W52/36

Abstract: A method of transmitting a power control factor by a device performing self-interference cancellation (SIC) in a wireless communication system using full-duplex radio (FDR) according to the present invention includes: transmitting, to a user equipment (UE), a first indicator indicating a power control for purpose of reducing an order to be considered as nonlinear components of a self-interference signal; and receiving, from the UE, a second indicator indicating whether the power control for the purpose of reducing the order to be considered as the nonlinear components of the self-interference signal is accepted or not in response to the first indicator.

公开(公告)号：US10003979B2

公开(公告)日：2018-06-19

申请号：US15527675

申请日：2014-12-10

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo Ko ,  Heejeong Cho ,  Hyeyoung Choi ,  Ilmu Byun ,  Kungmin Park

IPC: H04W40/00 ,  H04W16/32 ,  H04L12/46 ,  H04W16/02

CPC classification number: H04W16/32 ,  H04B17/00 ,  H04L12/4641 ,  H04W16/02 ,  H04W24/10 ,  H04W52/143 ,  H04W52/245 ,  H04W52/343

Abstract: A method for generating a signal for reducing interference in a user-centralized virtual cell, according to an embodiment of the present invention, comprises the steps of: transmitting a reference signal to a terminal within a user-centralized virtual cell; receiving, from the terminal, a first channel measurement report message including channel information measured by the terminal on the basis of the reference signal; exchanging, with the first channel measurement report message, a second channel measurement report message that another base station within the user-centralized cell receives from another terminal other than the terminal, thereby sharing a channel measurement report message with the another base station; and generating a signal for reducing the interference on the basis of the first channel measurement report and the second channel measurement report message.

公开(公告)号：US09923613B2

公开(公告)日：2018-03-20

申请号：US14891921

申请日：2014-02-21

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Jiwon Kang ,  Hyunsoo Ko ,  Jaehoon Chung

IPC: H04L5/00 ,  H04B7/0413 ,  H04L25/02

CPC classification number: H04B7/0413 ,  H04L5/0048 ,  H04L25/0202

Abstract: Reference signals (RSs) transmission scheme for massive MIMO system is disclosed. For this, ‘M’ resource blocks (RBs) are grouped into a resource block group (M>1). One or more antenna ports are grouped into one antenna group, wherein each of the antenna ports corresponds to each of the multiple antennas. The reference signals of the one antenna group are mapped into only one RB within one resource block group.

公开(公告)号：US20180062824A1

公开(公告)日：2018-03-01

申请号：US15556705

申请日：2015-10-14

Applicant: LG ELECTRONICS INC.

Inventor： Kwangseok Noh ,  Hyunsoo Ko ,  Kukheon Choi ,  Dongkyu Kim ,  Sangrim Lee

IPC: H04L5/16 ,  H04B17/336 ,  H04B17/18

CPC classification number: H04L5/16 ,  H04B17/18 ,  H04B17/336 ,  H04L5/0023 ,  H04L5/006 ,  H04L5/143 ,  H04W88/02 ,  H04W88/08

Abstract: A method for selecting, by a base station, HD mode or FD mode in a wireless communication system supporting an FDR scheme may comprise: a step of receiving, from a second terminal which receives interference from a first terminal, a value related to the signal to noise ratio (SNR) of the second terminal and a value related to the signal-to-interference-plus-noise ratio (SINR) of the second terminal; a step of measuring the SNR value and the SINR value of the base station; a step of calculating the channel capacity ratio between the HD mode and the FD mode by using the received value related to the SNR of the second terminal, the received value related to the SINR of the second terminal, the measured SNR value of the base station, and the measured SINR value of the base station; and a step of selecting either mode on the basis of the calculated channel capacity ratio between the HD mode and the FD mode.

公开(公告)号：US09893772B2

公开(公告)日：2018-02-13

申请号：US14442358

申请日：2013-08-14

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jinmin Kim ,  Hyunsoo Ko ,  Jaehoon Chung

IPC: H04B7/01 ,  H04L5/00 ,  H04B17/10 ,  H04L25/02 ,  H04L25/03

CPC classification number: H04B7/01 ,  H04B17/104 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/03898

Abstract: A method for transmitting a reference signal to a user equipment at a base station in a wireless communication system is disclosed. The method includes transmitting a control channel and the reference signal having a first pattern for the control channel to the user equipment and transmitting a data channel and the reference signal having a second pattern for the data channel to the user equipment, wherein reference signal density of the second pattern is determined based on a coherence time of the data channel, and the first pattern includes the second pattern.

公开(公告)号：US20180034602A1

公开(公告)日：2018-02-01

申请号：US15553029

申请日：2015-02-23

Applicant: LG Electronics Inc.

Inventor： Kungmin Park ,  Heejeong cho ,  Hyunsoo Ko ,  Ilmu Byun

IPC: H04L5/00 ,  H04B17/318 ,  H04B17/345 ,  H04W24/02

CPC classification number: H04L5/0032 ,  H04B15/02 ,  H04B17/318 ,  H04B17/345 ,  H04J11/005 ,  H04L1/0003 ,  H04L1/0041 ,  H04W16/24 ,  H04W24/00 ,  H04W24/02

Abstract: A disclosure of the present specification provides a method for performing link adaptation by a serving cell which performs interference randomization for inter-cell interference control. The method may comprise the steps of: acquiring interference information on at least one coordination cell to which interference coordination is to be applied among neighbor cells; and performing link adaptation on the basis of the interference information, wherein the interference information includes information on a modulation level, which indicates a modulation scheme for the coordination cell.

公开(公告)号：US09866303B2

公开(公告)日：2018-01-09

申请号：US14767892

申请日：2014-03-11

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo Ko ,  Jiwon Kang ,  Jaehoon Chung

IPC: H04B7/06 ,  H04B7/0456 ,  H04B7/04 ,  H04W72/04 ,  H04W24/10 ,  H04L5/00

CPC classification number: H04B7/0626 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0665 ,  H04L5/0048 ,  H04W24/10 ,  H04W72/0413

Abstract: The present invention relates to a wireless communication system and, more specifically, to a method and device for reporting channel state information (CSI). The method by which a terminal in a wireless communication system reports CSI, according to one embodiment of the present invention, can comprise the steps of: receiving a reference signal from a base station; and reporting, to the base station, the CSI generated by using the reference signal. The CSI can include at least one first domain precoding matrix indicator (PMI) indicating a first precoding matrix for a first domain of a two-dimensional antenna structure and at least one second domain PMI indicating a second precoding matrix for a second domain of the two-dimensional antenna structure. A reporting period of the at least one first domain PMI can be shorter than a reporting period of the at least one second domain PMI.