公开(公告)号：US10117274B2

公开(公告)日：2018-10-30

申请号：US15452668

申请日：2017-03-07

Applicant: LG ELECTRONICS INC.

Inventor： Genebeck Hahn ,  Jiwon Kang ,  Heejeong Cho ,  Eunjong Lee ,  Ilmu Byun

IPC: H04W74/08 ,  H04W76/19 ,  H04W76/18 ,  H04W76/38

Abstract: The present disclosure provides a method and apparatus for performing an operation related to a Radio Link Failure (RLF) in a wireless communication system. Particularly, the method performed by a user equipment (UE) includes monitoring a radio link state of a serving base station (BS); detecting a physical layer problem; transmitting a specific random access preamble related to the RLF to one or more neighboring BSs through a specific Physical Random Access Channel (PRACH) resource; receiving a random access response from the one or more neighboring BSs; determining a neighboring BS to which an additional RRC connection is to be configured based on the received random access response; and configuring an RRC connection with the determined neighboring BS, wherein the specific PRACH resource is a common PRACH resource that is separately configured to transmit the specific random access preamble, thereby preventing the Link Outage phenomenon of the UE for a specific service.

公开(公告)号：US10090899B2

公开(公告)日：2018-10-02

申请号：US15748344

申请日：2016-03-17

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/02 ,  H04B7/0456 ,  H04B7/06

Abstract: Disclosed in the present application is a method by which a terminal receives a signal, to which hybrid beamforming is applied, from a base station in a wireless communication system. More specifically, the method comprises the steps of: acquiring information on a first precoder for first beamforming of the hybrid beamforming; generating information on a precompensation precoder for the first beamforming by using the information on the first precoder; reporting the information on the precompensation precoder to the base station; and receiving, from the base station, a signal to which the precompensation precoder, the first beamforming, and second beamforming are applied, wherein the precompensation precoder adjusts, to zero degrees, a boresight direction of a signal to which the first precoder for the first beamforming is applied, and a second precoder for the second beamforming is configured to enable the signal to be transmitted in a final boresight direction on the basis of a boresight direction of zero degrees.

公开(公告)号：US20180234212A1

公开(公告)日：2018-08-16

申请号：US15749916

申请日：2016-01-22

Applicant: LG ELECTRONICS INC.

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

IPC: H04L1/18 ,  H04W72/12

CPC classification number: H04L1/1812 ,  H04B7/022 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/26 ,  H04L1/0026 ,  H04L1/1845 ,  H04L1/1854 ,  H04L1/1896 ,  H04W72/121

Abstract: Disclosed is a retransmitted data reception method comprising the steps of: receiving a first data packet from a base station through a first DU group including one or more DUs; receiving a second data packet, which is retransmitted for the first data packet, through a second DU group including another one or more of the DUs; and combining the first data packet and the second data packet so as to decode the combined data packet, wherein control information corresponding to the second data packet includes an HARQ process ID for notifying that the second data packet is retransmitted for the first data packet.

公开(公告)号：US10034282B2

公开(公告)日：2018-07-24

申请号：US15364168

申请日：2016-11-29

Applicant: LG ELECTRONICS INC.

Inventor： Kitae Kim ,  Jinyoung Chun ,  Sunam Kim ,  Jiwon Kang ,  Binchul Ihm ,  Sungho Park

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04W72/12

Abstract: In a wireless communication system, when a terminal receives control information from a downlink subframe, which is divided into a Physical Downlink Control Channel (PDCCH) region and a Physical Downlink Shared Channel (PDSCH) region, in a wireless communication system, the receiving of the control information includes: receiving, from a base station, first CFI information indicating the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols available for Physical Downlink Control Channel (PDCCH) transmission; receiving, from the base station, second CFI information indicating start OFDM symbol information available for Physical Downlink Shared Channel (PDSCH) transmission corresponding to an enhanced Physical Downlink Control Channel (E-PDCCH); and receiving the PDSCH from the base station on the basis of the first CFI information or the second CFI information. The PDCCH is placed in the PDCCH region of the downlink subframe, and the E-PDCCH is placed in the PDSCH region of the downlink subframe.

公开(公告)号：US10033448B2

公开(公告)日：2018-07-24

申请号：US14781862

申请日：2013-12-19

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/06 ,  H04B7/0417 ,  H04B7/0456 ,  H04W72/04

Abstract: A method and apparatus for performing fractional beamforming using a massive antenna array at a Base Station (BS) in a wireless communication system are disclosed. The method includes dividing the massive antenna array into partitions by rows or by columns, transmitting control information for the fractional beamforming to a User Equipment (UE), receiving feedback information based on the control information from the UE, and transmitting a signal to the UE by performing beamforming using sub-precoders for the partitions and a linking precoder that links the partitions. The control information includes at least one of information about the partitions, information about pilot patterns corresponding to the partitions, information about the linking precoder, and information indicating whether the partitions belong to the same transmission point.

公开(公告)号：US10015035B2

公开(公告)日：2018-07-03

申请号：US15523582

申请日：2015-11-02

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Wookbong Lee ,  Eunsung Park ,  HanGyu Cho ,  Jiwon Kang

IPC: H04L27/22 ,  H04L27/26 ,  H04W84/12

CPC classification number: H04L27/2657 ,  H04L27/22 ,  H04W84/12

Abstract: Disclosed is a CFO estimation method comprising: generating a first function defined by reception signals in two successive OFDM symbols for a particular subcarrier; generating a second function defined on the basis of a sign of a real part of the first function; repeatedly performing a process of generating the first function and the second function for an entire subcarrier set; and determining a phase of a third function obtained by adding results of the repeated performance to be a residual CFO.

公开(公告)号：US10003392B2

公开(公告)日：2018-06-19

申请号：US15532946

申请日：2015-06-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/06 ,  H04L5/00 ,  H04B7/0413

CPC classification number: H04B7/0626 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0619 ,  H04B7/063 ,  H04L5/0048 ,  H04L5/0057

Abstract: Disclosed in the present application is a method by which a terminal generates channel state information for multi-antenna-based beamforming in a wireless communication system. Specifically, the method comprises the steps of: receiving a first pilot signal and a second pilot signal from a base station; selecting a first rank on the basis of the first pilot signal and selecting a second rank on the basis of the second pilot signal; setting a rank search range for a three-dimensional channel on the basis of the first rank and the second rank; and selecting a rank for the three-dimensional channel within the rank search range and a precoder corresponding to the rank for the three-dimensional channel.

公开(公告)号：US20180159603A1

公开(公告)日：2018-06-07

申请号：US15578554

申请日：2016-01-29

Applicant: LG ELECTRONICS INC.

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

IPC: H04B7/0456 ,  H04B7/06 ,  H04L27/26

Abstract: The present invention relates to a method and apparatus for transmitting precoding information by a specific user equipment (UE) in a wireless communication system. More specifically, the present invention relates to a method comprising receiving group information from a base station (BS), the group information comprising information indicating a representative UE in a UE group and information indicating one or more member UEs, the specific UE being one of the one or more member UEs; receiving first control information transmitted from the representative UE or the BS, the first control information comprising first precoding information; determining second precoding information based on the first precoding information; and transmitting second control information comprising the determined second precoding information to the BS; and an apparatus therefor.

公开(公告)号：US09954592B2

公开(公告)日：2018-04-24

申请号：US14768611

申请日：2014-03-11

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo Ko ,  Jiwon Kang ,  Jaehoon Chung

IPC: H04W72/04 ,  H04B7/06 ,  H04B7/0456 ,  H04B7/04 ,  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 an apparatus for reporting channel state information (CSI). According to one embodiment of the present invention, the method by which a terminal of the wireless communication system reports the CSI comprises: a step of receiving a reference signal from a base station; and a step of reporting the CSI generated through the reference signal to the base station. The CSI can include information for indicating a first pre-coding matrix for a first domain of a two-dimensional antenna structure and a second pre-coding matrix for a second domain of the two-dimensional antenna structure. The first pre-coding matrix can be determined on the basis of a coefficient wherein an angle the first domain is determined according to an angle in the second domain.

公开(公告)号：US09882691B2

公开(公告)日：2018-01-30

申请号：US14767107

申请日：2013-10-10

Applicant: LG ELECTRONICS INC.

Inventor： Jiwon Kang ,  Sungho Park ,  Jaehoon Chung ,  Sunam Kim ,  Soocheol Kyeong ,  Jinmin Kim ,  Kitae Kim ,  Kyunghaeng Lee ,  Hyunsoo Ko

IPC: H04L5/00 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/024 ,  H04B7/10

CPC classification number: H04L5/0048 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0691 ,  H04B7/10 ,  H04L5/0023

Abstract: A method for transmitting a reference signal for supporting a plurality of antennas to a User Equipment (UE) at a Base Station (BS) in a wireless communication system is disclosed. The method includes grouping the plurality of antennas into antenna groups comprising a predetermined number of antenna ports, transmitting resource information about a reference signal for at least one antenna group of the antenna groups, and transmitting the reference signal for the at least one antenna group to the UE based on the resource information.