公开(公告)号：US10117199B2

公开(公告)日：2018-10-30

申请号：US15274687

申请日：2016-09-23

Applicant: LG Electronics Inc.

Inventor： Kunil Yum ,  Yunjung Yi ,  Seonwook Kim

IPC: H04W24/10 ,  H04W56/00 ,  H04W72/04 ,  H04L5/00

Abstract: A method of measuring a channel, which is measured by a terminal configured to operate on two or more frequency bands, each of the frequency bands being configured with a subcarrier spacing different from each other in a wireless communication system, may include performing blind detection on a synchronization signal or a reference signal defined by each subcarrier spacing, determining a subcarrier spacing configured for the terminal according to the detected synchronization signal or the reference signal, and performing channel measurement using the detected synchronization signal or the reference signal.

公开(公告)号：US10033507B2

公开(公告)日：2018-07-24

申请号：US15319669

申请日：2015-07-21

Applicant: LG ELECTRONICS INC.

Inventor： Kunil Yum ,  Hyungtae Kim ,  Jonghyun Park ,  Kijun Kim

IPC: H04L5/00 ,  H04B7/04

Abstract: A method for reporting a channel state for a downlink channel to be transmitted via a two-dimensional array of antenna elements consisting of one or more horizontal antenna groups and vertical antenna groups in accordance with one embodiment of the present invention, the method being performed by a terminal, comprises the steps of: receiving a channel state information-reference signal (CSI-RS) configuration for at least one vertical antenna group and a CSI-RS configuration for at least one horizontal antenna group; and calculating channel state information on the downlink channel using the received CSI-RS configurations and transmitting the channel information to a serving cell, wherein the channel state information comprises individual channel state information for a channel of the at least one vertical antenna group (hereinafter, ‘vertical channel’) and a channel of the at least one horizontal antenna group (hereinafter, ‘horizontal channel’), a combination of the individual channel state information, or joint channel state information of the vertical channel and the horizontal channel, each of which is assigned transmission priority, and the channel state information can be transmitted according to the transmission priority.

公开(公告)号：US10020920B2

公开(公告)日：2018-07-10

申请号：US15112971

申请日：2015-03-04

Applicant: LG ELECTRONICS INC.

Inventor： Youngtae Kim ,  Jonghyun Park ,  Kijun Kim ,  Hanjun Park ,  Kunil Yum

IPC: H04W4/00 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0413 ,  H04W72/04 ,  H04L27/26 ,  H04W88/08

CPC classification number: H04L5/0048 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0691 ,  H04L5/0023 ,  H04L5/0051 ,  H04L27/2613 ,  H04W72/046 ,  H04W88/08

Abstract: The present invention relates to a method and apparatus for transmitting a reference signal by a base station in a wireless communication system supporting multiple antennas. More specifically, the present invention comprises the steps of: transmitting a reference signal configuration including specific reference signal IDs configured to identify a plurality of antenna groups; transmitting at least one reference signal associated with the plurality of antenna groups; and receiving channel state information measured according to the at least one reference signal, wherein each antenna group includes a plurality of antennas which are grouped on the basis of a specific domain of the multiple antennas, and the plurality of antenna groups are configured to perform beamforming in different directions.

公开(公告)号：US20170111098A1

公开(公告)日：2017-04-20

申请号：US15309019

申请日：2015-05-29

Applicant: LG Electronics Inc.

Inventor： Youngtae Kim ,  Hanjun Park ,  Jonghyun Park ,  Kijun Kim ,  Bonghoe Kim ,  Kunil Yum

IPC: H04B7/06

Abstract: The present invention relates to a method and device for measuring channel quality by a base station having a two-dimensional active antenna system including multiple antennas. Particularly, the method comprises: receiving channel state information (CSI) generated on the basis of a first reference signal relating to a part of multiple antennas, from a terminal; selecting a precoding and a rank based on a precoding matrix indicator (PMI) and a rank indicator (RI) of the received CSI; generating a port by applying the selected precoding and the selected rank; through the generated port, transmitting, to the terminal, a physical downlink shared channel (PDSCH) and a demodulation-reference signal (DM-RS) configured for the terminal; and receiving, from the terminal, a channel quality indication (CQI) feedback for reducing a mismatch for the CQI of the CSI, wherein the CQI feedback may be generated based on the DM-RS.

公开(公告)号：US09621241B2

公开(公告)日：2017-04-11

申请号：US15077672

申请日：2016-03-22

Applicant: LG ELECTRONICS INC.

Inventor： Kunil Yum ,  Jonghyun Park ,  Bonghoe Kim ,  Kijun Kim

IPC: H04K1/10 ,  H04L27/28 ,  H04B7/0456

CPC classification number: H04B7/0456 ,  H04B7/024 ,  H04B7/0478 ,  H04B7/065

Abstract: A method for reporting, by a UE, a downlink channel state in a wireless communication system according to an embodiment of the present invention includes: receiving a vertical precoding matrix indicator (PMI) to be used to calculate the downlink channel state; calculating a value of the downlink channel state using the received vertical PMI; and reporting the calculated downlink channel state value to an eNB, wherein the received vertical PMI is used from a later subframe between a subframe in which the vertical PMI is received and a subframe preceding a subframe in which the calculated downlink channel state value is reported by the number of subframes necessary to calculate the downlink channel state value using the received vertical PMI.

公开(公告)号：US09515711B2

公开(公告)日：2016-12-06

申请号：US14892155

申请日：2014-07-17

Applicant: LG ELECTRONICS INC.

Inventor： Kunil Yum ,  Youngtae Kim ,  Kijun Kim ,  Jonghyun Park

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

CPC classification number: H04B7/0456 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0647 ,  H04B7/066 ,  H04W72/042

Abstract: Provided is a method for receiving a downlink signal in a wireless communication system, the method comprising: transmitting, by a user equipment (UE), information on vertical angle restriction to be used for a precoding matrix which the UE desires to an eNodeB (eNB); and receiving, by the UE, a downlink signal precoded according to the information on vertical angle restriction, wherein the information on vertical angle restriction includes values indicating a lower limit angle and an upper limit angle for the precoding matrix.

Abstract translation: 提供了一种用于在无线通信系统中接收下行链路信号的方法，所述方法包括：由用户设备（UE）向UE发送用于UE期望的预编码矩阵的信息（eNB） ）; 以及由UE接收根据关于垂直角度限制的信息预编码的下行链路信号，其中关于垂直角度限制的信息包括指示预编码矩阵的下限角和上限角的值。