公开(公告)号：US09923612B2

公开(公告)日：2018-03-20

申请号：US14762159

申请日：2014-01-15

Applicant: Samsung Electronics Co., Ltd. ,  Korea National University of Transportation Industry Academic Cooperation Foundation

Inventor： Hyoungju Ji ,  Cheol Mun ,  Younsun Kim ,  Juho Lee ,  Hyojin Lee ,  Joonyoung Cho

IPC: H04B7/0413 ,  H04B7/26 ,  H04B7/06 ,  H04L5/00 ,  H04W72/12

CPC classification number: H04B7/0413 ,  H04B7/0697 ,  H04B7/2621 ,  H04L5/0023 ,  H04L5/0048 ,  H04W72/1273

Abstract: The present invention proposes a hybrid spatial multiplexing (SM) and a space division multiple access (SDMA) technique in a frequency division duplex (FDD) massive multiple-input multiple output (MIMO) system using a two-dimensional planar array antenna, which effectively transmits a channel state information reference signal (CSI-RS) for estimating a downlink two-dimensional space channel using only a limited amount of downlink radio resources, and optimally selects and performs the SM and SDMA techniques in a two-dimensional space channel. To this end, the present invention proposes a technique which defines space resource blocks (SRB) by grouping space elements (SE) having a high spatial correlation between downlink channels in the horizontal dimension and corresponding SEs thereof in the vertical dimension, and transmits CSI-RSs for estimating channels in vertical dimension SEs corresponding to one selected horizontal SE in each SRB every transmit time interval (TTI). The present invention proposes a technique wherein user equipment (UE) estimates the spatial correlation between channels of different horizontal dimension SEs belonging to the same SRB received in different TTIs and the spatial correlation between channels of horizontal dimension SEs belonging to different SRBs received in the same TTI, and feeds information for changing the size of SRB of the corresponding UE to an optimal size back to eNodeB. The present invention proposes a technique wherein the UE estimates downlink channels through CSI-RSs transmitted from each SRB, and each UE feeds an index of a preferred SRB, a rank of the corresponding SRB in the vertical dimension, and channel quality information (CQI) back to eNodeB. When each UE determines the rank, it is possible to transmit the ranks to the fullest extent in the vertical dimension and only a single rank from each SRB in the horizontal dimension.

公开(公告)号：US09408086B2

公开(公告)日：2016-08-02

申请号：US13728510

申请日：2012-12-27

Applicant: Samsung Electronics Co., Ltd. ,  Industry-Academic Cooperation Foundation, Korea National University of Transportation

Inventor： Kiil Kim ,  Cheol Mun ,  Younsun Kim ,  Juho Lee ,  Hyojin Lee ,  Joonyoung Cho

IPC: H04L1/00 ,  H04W24/02 ,  H04L5/00 ,  H04B7/04 ,  H04W16/28 ,  H04W72/08 ,  H04L25/02 ,  H04B7/06

CPC classification number: H04W24/02 ,  H04B7/0417 ,  H04B7/0478 ,  H04B7/0639 ,  H04L5/0023 ,  H04L25/0204 ,  H04W16/28 ,  H04W72/085

Abstract: A Channel State Information (CSI) feedback method and apparatus is provided for transmitting, at a base station, the CSIs for plural transmit antennas with a limited amount resource and receiving, at a mobile station, the CSIs efficiently in a massive Multiple Input Multiple Output (MIMO) system operating in the Frequency Division Duplex (FDD) mode.

Abstract translation: 提供了一种信道状态信息（CSI）反馈方法和装置，用于在基站处发送具有有限资源资源的多个发射天线的CSI，并在移动台以高质量的多输入多输出方式接收CSI （MIMO）系统以频分双工（FDD）模式工作。

公开(公告)号：US20130182596A1

公开(公告)日：2013-07-18

申请号：US13784205

申请日：2013-03-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： In Ho LEE ,  Cheol Mun ,  Ju Ho Lee ,  Jin Kyu Han ,  Jong Gwan Yook

IPC: H04B7/04

CPC classification number: H04B7/0417 ,  H04B7/0626 ,  H04W88/08

Abstract: A method and an apparatus for sending and receiving channel state information in network Multiple-Input Multiple-Output (MIMO) wireless communication systems are provided. Hybrid feedback technology is provided to transfer complete Channel State Information (CSI) to a transmitter by efficiently combining limited amounts of long-term channel information and short-term channel information are In a down link MIMO network system.

Abstract translation: 提供了一种用于在网络多输入多输出（MIMO）无线通信系统中发送和接收信道状态信息的方法和装置。 提供混合反馈技术，通过有效地组合有限量的长期信道信息和短期信道信息，将完整的信道状态信息（CSI）传送到发射机。在下行链路MIMO网络系统中。

公开(公告)号：US11190240B2

公开(公告)日：2021-11-30

申请号：US14822519

申请日：2015-08-10

Applicant: Samsung Electronics Co., Ltd. ,  Industry-Academic Cooperation Foundation, Yonsei University

Inventor： In Ho Lee ,  Cheol Mun ,  Juho Lee ,  Jin Kyu Han ,  Jong Gwan Yook

IPC: H04B7/0417 ,  H04B7/06 ,  H04W88/08

Abstract: A method and an apparatus are provided for transmitting channel state information (CSI) by a terminal in a communication system. The method includes receiving a first signal from a first serving cell; receiving a second signal from a second serving cell; calculating first CSI for the first serving cell based on the first signal; calculating second CSI for the first serving cell based on the first signal; calculating first CSI for the second serving cell based on the second signal; calculating second CSI for the second serving cell based on the second signal; transmitting the first CSI and the second CSI for the first serving cell respectively; and transmitting the first CSI and the second CSI for the second serving cell respectively.

公开(公告)号：US10224992B2

公开(公告)日：2019-03-05

申请号：US14785591

申请日：2014-04-17

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA NATIONAL UNIVERSITY OF TRANSPORTATION INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Cheol Mun ,  Youn-Sun Kim ,  Hyoung-Ju Ji ,  Hyo-Jin Lee

IPC: H04B7/06 ,  H04B15/00 ,  H04L1/00 ,  H04L1/06 ,  H04W16/28

Abstract: The present invention proposes an apparatus and a method capable of forming M*N number of beams by a base station, which supports signal transmission/reception of the macro service area in heterogeneous networks in which a macro service area is formed with the M*N number of beams through a two-dimensional arrangement simultaneously considering the horizontal dimension and the vertical dimension and at least one small service is formed in the macro service area. To this end, at least one interference prediction beam formed to transmit signals interfering in transmission signals in at least one small service area from among the signals to be transmitted by the M*N number of beams is selected, and each of the M*N number of beams is formed in consideration of the inter-cell interference in at least one small service area due to the signals to be transmitted by at least one selected interference prediction beam.

公开(公告)号：US09106282B2

公开(公告)日：2015-08-11

申请号：US13784205

申请日：2013-03-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： In Ho Lee ,  Cheol Mun ,  Jun Ho Lee ,  Jin Kyu Han ,  Jong Gwan Yook

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0417 ,  H04B7/0626 ,  H04W88/08

Abstract: A method and an apparatus for sending and receiving channel state information in network Multiple-Input Multiple-Output (MIMO) wireless communication systems are provided. Hybrid feedback technology is provided to transfer complete Channel State Information (CSI) to a transmitter by efficiently combining limited amounts of long-term channel information and short-term channel information are In a down link MIMO network system.

Abstract translation: 提供了一种用于在网络多输入多输出（MIMO）无线通信系统中发送和接收信道状态信息的方法和装置。 提供混合反馈技术，通过有效地组合有限量的长期信道信息和短期信道信息，将完整的信道状态信息（CSI）传送到发射机。在下行链路MIMO网络系统中。

公开(公告)号：USRE46951E1

公开(公告)日：2018-07-10

申请号：US14518741

申请日：2014-10-20

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jin-Kyu Han ,  Dae-Gyun Kim ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim ,  Yu-Chul Kim ,  Cheol Mun

IPC: H04B1/00

CPC classification number: H04B7/0626 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0658 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/06 ,  H04L25/0228 ,  H04L25/0242

Abstract: An apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas are provided. A receiver estimates a fading channel of received data, selects a weight set relative to a maximum data transmission rate from at least one weight set with elements of a plurality of orthogonal weight vectors, and transmits feedback information including the selected weight set and channel-by-channel state information to a transmitter. The transmitter demultiplexes data to be transmitted on a basis of the feedback information into at least one sub-data stream, multiplies each sub-data stream by an associated weight, and transmits the data.

公开(公告)号：US20150349861A1

公开(公告)日：2015-12-03

申请号：US14822519

申请日：2015-08-10

Applicant: Samsung Electronics Co., Ltd. ,  Industry-Academic Cooperation Foundation, Yonsei University

Inventor： In Ho LEE ,  Cheol Mun ,  Ju Ho Lee ,  Jin Kyu Han ,  Jong Gwan Yook

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0417 ,  H04B7/0626 ,  H04W88/08

Abstract: A method and an apparatus are provided for transmitting channel state information (CSI) by a terminal in a communication system. The method includes receiving a first signal from a first serving cell; receiving a second signal from a second serving cell; calculating first CSI for the first serving cell based on the first signal; calculating second CSI for the first serving cell based on the first signal; calculating first CSI for the second serving cell based on the second signal; calculating second CSI for the second serving cell based on the second signal; transmitting the first CSI and the second CSI for the first serving cell respectively; and transmitting the first CSI and the second CSI for the second serving cell respectively.

Abstract translation: 提供一种用于在通信系统中由终端发送信道状态信息（CSI）的方法和装置。 该方法包括从第一服务小区接收第一信号; 从第二服务小区接收第二信号; 基于第一信号计算第一服务小区的第一CSI; 基于所述第一信号计算所述第一服务小区的第二CSI; 基于所述第二信号计算所述第二服务小区的第一CSI; 基于所述第二信号计算所述第二服务小区的第二CSI; 分别发送第一服务小区的第一CSI和第二CSI; 以及分别发送第二服务小区的第一CSI和第二CSI。

公开(公告)号：USRE45203E1

公开(公告)日：2014-10-21

申请号：US13871939

申请日：2013-04-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jin-Kyu Han ,  Dae-Gyun Kim ,  Hwan-Joon Kwon ,  Dong-Hee Kim ,  Youn-Sun Kim ,  Yu-Chul Kim ,  Cheol Mun

IPC: H04B1/00 ,  H04B7/00

CPC classification number: H04B7/0626 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0658 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/06 ,  H04L25/0228 ,  H04L25/0242

Abstract: An apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas are provided. A receiver estimates a fading channel of received data, selects a weight set relative to a maximum data transmission rate from at least one weight set with elements of a plurality of orthogonal weight vectors, and transmits feedback information including the selected weight set and channel-by-channel state information to a transmitter. The transmitter demultiplexes data to be transmitted on a basis of the feedback information into at least one sub-data stream, multiplies each sub-data stream by an associated weight, and transmits the data.

Abstract translation: 提供了一种在使用多个天线的移动通信系统中发送/接收数据的装置和方法。 接收机估计接收数据的衰落信道，从具有多个正交权重向量的元素的至少一个权重集中选择相对于最大数据传输速率的权重集，并且发送包括所选权重集和频道的反馈信息 信道状态信息发送到发送器。 发射机将基于反馈信息发送的数据解复用为至少一个子数据流，将每个子数据流乘以相关联的权重，并发送数据。

公开(公告)号：US09635642B2

公开(公告)日：2017-04-25

申请号：US13728450

申请日：2012-12-27

Applicant: Samsung Electronics Co., Ltd. ,  Industry-Academic Cooperation Foundation, Korea National University of Transportation

Inventor： Hyojin Lee ,  Cheol Mun ,  Kiil Kim ,  Younsun Kim ,  Juho Lee ,  Joonyoung Cho

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04L5/14 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

CPC classification number: H04W72/04 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0695 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0091 ,  H04L5/143

Abstract: Methods and apparatus are provided for beamforming and information feedback are provided. Signals for beams to be transmitted through corresponding antenna ports, are generated. The beams are formed by precoding the signals with beamforming vectors. The beams are sorted into a number of resource reuse groups based on a resource that is to be shared. The beams are transmitted, using resources allocated per group, to a receiver. Feedback information is generated on at least one antenna port, based on the received beams. The feedback information is transmitted to the transmitter. A beam is selected having a greatest gain for a transmitter using the feedback information. A transmission resource is allocated for the selected beam.