公开(公告)号：US10340988B2

公开(公告)日：2019-07-02

申请号：US15750375

申请日：2016-06-29

Applicant: LG ELECTRONICS INC.

Inventor： Heejin Kim ,  Jiwon Kang ,  Kitae Kim ,  Kilbom Lee ,  Kungmin Park

IPC: H04B7/0456 ,  H04B7/06 ,  H04W16/28

Abstract: The present invention relates to a method for transmitting channel information to a base station in a wireless communication system, and a device therefor, the method comprising the steps of: receiving information on a user equipment (UE) group in which a specific UE is included; receiving, from a representative UE of the UE group, first control information comprising first beam information; determining second beam information on the basis of the first beam information; and transmitting, to a base station, second control information comprising differential information between the determined second beam information and the first beam information.

公开(公告)号：US10291306B2

公开(公告)日：2019-05-14

申请号：US15561001

申请日：2015-07-24

Applicant: LG ELECTRONICS INC.

Inventor： Heejin Kim ,  Jiwon Kang ,  Kitae Kim ,  Kilbom Lee ,  Kungmin Park

IPC: G01S7/52 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0456 ,  H04B7/08 ,  H04B7/024

Abstract: The present specification pertains to a method by which a terminal feeds back CSI information in a wireless communication system to which 3D beamforming is applied, the method comprising the steps of: receiving a pilot signal from a base station; setting either a first CSI transmission mode or a second CSI transmission mode; and feeding back CSI information on the basis of the set CSI transmission mode. Here, a period and offset of the CSI information to be fed back can be preset regardless of the CSI transmission mode.

公开(公告)号：US10251191B2

公开(公告)日：2019-04-02

申请号：US15506709

申请日：2015-02-12

Applicant: LG ELECTRONICS INC.

Inventor： Eunjong Lee ,  Kitae Kim ,  Giwon Park ,  Jaehoon Chung ,  Jiwon Kang ,  Hyeyoung Choi

IPC: H04W72/12 ,  H04L5/00 ,  H04L27/26 ,  H04W76/10 ,  H04W72/04

Abstract: Provided are a method and apparatus for requesting scheduling for an uplink data transmission in a wireless communication system. The method may include receiving, by a user equipment, an additional scheduling request (SR) resource configuration information including additional SR resource information and buffer size information configured to the additional SR resource in addition to a default SR resource from a base station, transmitting, by the user equipment, an SR through the default SR resource or the additional SR resource to the base station, receiving, by the user equipment, an uplink resource allocation information which is determined according to the resource in which the SR is transmitted from the base station, and transmitting, by the user equipment, the uplink data to the base station through a physical uplink shared channel (PUSCH) resource which is allocated by the uplink resource allocation information.

公开(公告)号：US10231249B2

公开(公告)日：2019-03-12

申请号：US15314437

申请日：2015-04-30

Applicant: LG ELECTRONICS INC. ,  KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Jiwon Kang ,  Inkyu Lee ,  Sangrim Lee

IPC: H04L27/00 ,  H04W72/08 ,  H04B7/06 ,  H04B7/0456 ,  H04L5/00

Abstract: Disclosed is a signal transmission method. The signal transmission method includes the steps of: setting a default value for generating a beamforming vector to be used for precoding; performing a calculation process of an outer layer for determining whether an accuracy of an energy efficiency satisfies a first threshold value range during a dual layer calculation process for maximizing an energy efficiency of a base station; performing a calculation process of an inner layer for calculating a predetermined second threshold value on which deterministic equivalence of a channel gain matrix coverage; generating a beamforming vector on the basis of values used in the calculation process of the outer layer and the calculation process of the inner layer, when the accuracy of the energy efficiency satisfies the first threshold value range in the calculation process of the outer layer; generating a transmission signal using the beamforming vector; and transmitting the generated transmission signal.

公开(公告)号：US10231241B2

公开(公告)日：2019-03-12

申请号：US15504896

申请日：2015-08-21

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jiwon Kang ,  Kilbom Lee ,  Heejin Kim

IPC: H04W72/04 ,  H04L1/18 ,  H04B7/06 ,  H04W72/00 ,  H04L5/00 ,  H04W88/02 ,  H04W88/08

Abstract: The present invention relates to a method and a device for transmitting a training symbol for hybrid beamforming. A method for transmitting a training symbol for estimating an analog beam in a wireless access system which supports hybrid beamforming according to one embodiment of the present invention comprises: a step of repeatedly transmitting a training symbol a number of times equivalent to the number of analog candidate beams; and a step of repeatedly transmitting a broadcasting channel a number of times equivalent to the number of analog candidate beams. A training symbol section, where the training symbol is transmitted, can be allocated to the same subframe as a subframe to which the repeatedly transmitted broadcasting channel is allocated.

公开(公告)号：US10218478B2

公开(公告)日：2019-02-26

申请号：US15505496

申请日：2015-06-25

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jiwon Kang ,  Kilbom Lee ,  Heejin Kim

IPC: H04L5/00 ,  H04B7/06 ,  H04B7/08 ,  H04W72/04 ,  H04W88/02 ,  H04W88/08

Abstract: A method is provided for determining a weight for hybrid beamforming. A base station signals, to a user equipment, a configuration for repeated transmission of a first omnidirectional beam equally formed in all directions, receives the first omnidirectional beam from the user equipment by forming a second omnidirectional beam, and repeatedly receives the first omnidirectional beam from the user equipment by sequentially forming a plurality of directional beams corresponding to a plurality of directions. The base station determines a weight for hybrid beamforming by obtaining a gain difference between the first omnidirectional beam received through the second omnidirectional beam and the first omnidirectional beam received through a first directional beam among the plurality of directional beams, selecting a precoding matrix indicator (PMI) and acquiring, based on the PMI, a coefficient of a phase shifter and a coefficient of a power amplifier for analog beamforming of the hybrid beamforming.

公开(公告)号：US10212714B2

公开(公告)日：2019-02-19

申请号：US15120218

申请日：2014-12-15

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Jiwon Kang ,  Kitae Kim

IPC: H04W72/08 ,  H04B7/0413 ,  H04L25/03 ,  H04L5/00 ,  H04B7/0452

Abstract: Disclosed herein are a received signal processing method including selecting a reference resource element (RE) from an RE group including a plurality of REs, generating a common filter to be shared among the plurality of REs of the RE group based on channel information of the reference RE, detecting primary signals, from which channel influence is removed, of the plurality of REs by applying the common filter to received signals of the plurality of REs, and generating secondary signals by compensating for primary signals of REs except for the reference RE among the plurality of REs using channel information of the REs, and a multiple input multiple output (MIMO) receiver.

公开(公告)号：US10212590B2

公开(公告)日：2019-02-19

申请号：US15665717

申请日：2017-08-01

Applicant: LG ELECTRONICS INC.

Inventor： Genebeck Hahn ,  Jiwon Kang ,  Heejin Kim ,  Ilmu Byun ,  Heejeong Cho ,  Hyunjin Shim

IPC: H04W12/06 ,  H04L29/06 ,  G06F21/44 ,  H04W48/08 ,  H04W88/06

Abstract: Disclosed are an authentication method performed by a radio access network (RAN) node in a wireless communication system and an apparatus thereof. In the present disclosure, a first message indicating initiation of an authentication procedure of the RAN node for multiple user equipments (UEs) used for a specific purpose to attach to a network is transmitted, an authentication request message including first security information for authenticating the network is received from the first network node, second security information for authenticating the RAN node is transmitted to the first network node, and a complete message indicating completion of the authentication procedure is received from the first network node.

公开(公告)号：US10182447B2

公开(公告)日：2019-01-15

申请号：US15309151

申请日：2015-04-30

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Jiwon Kang ,  Kitae Kim ,  Heejin Kim

IPC: H04W4/00 ,  H04W72/08 ,  H04B7/08 ,  H04B7/0404 ,  H04B7/0413 ,  H04L5/00 ,  H04W72/04

Abstract: Disclosed are a method and a receiver for processing a received signal, the method dividing a plurality of resource elements (RE) to create RE groups by considering the inter-relationships between the channels of the plurality of REs, selecting a reference RE for each RE group, and generating, for each RE group, a detection signal from a received signal on the basis of channel information of the reference RE.

公开(公告)号：US10158467B2

公开(公告)日：2018-12-18

申请号：US15456364

申请日：2017-03-10

Applicant: LG ELECTRONICS INC.

Inventor： Minki Ahn ,  Jiwon Kang ,  Kijun Kim

IPC: H04B7/06 ,  H04L5/00 ,  H04L1/00 ,  H04L1/18

Abstract: Provided are a method and an apparatus for transmitting uplink data based on hybrid beamforming in a wireless communication system. Specifically, a user equipment (UE) receives a first modulation and coding scheme (MCS) determined based on a sounding reference signal from a base station (BS) through an uplink grant. The UE determines an MCS offset based on a variation of an uplink channel when the variation of the uplink channel between a subframe for transmitting the sounding reference signal and a subframe for receiving the uplink grant is a threshold or greater. The UE transmits uplink data to the BS using a second MCS acquired from the first MCS and the MCS offset.