公开(公告)号：US20230086667A1

公开(公告)日：2023-03-23

申请号：US17993556

申请日：2022-11-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Seung LEE ,  Moon Sik LEE ,  Jae Woo PARK ,  Jee Yon CHOI ,  Young Hoon KIM ,  Ju Ho PARK ,  Hoo Sung LEE ,  Young Il JEON ,  Chan Bok JEONG ,  Hyung Sik JU ,  Ik Jae CHUN ,  Il Gyu KIM

IPC: H04L5/00 ,  H04W72/04

Abstract: Disclosed are a method and an apparatus for communication using fronthaul interfaces. An operation method of a first communication node may include transmitting a section type 8 message #1 including numerology-related information #1; transmitting a section type 9 message #1 including channel information of each of one or more second communication nodes indicated by the section type 8 message #1 and the numerology related information #1, transmitting a section type 8 message #2 including numerology-related information #2 other than the numerology-related information #1; and transmitting a section type 9 message #2 including channel information of each of one or more third communication nodes indicated by the section type 8 message #2 and the numerology-related information #2.

公开(公告)号：US20210105826A1

公开(公告)日：2021-04-08

申请号：US17029740

申请日：2020-09-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ji Soo PARK ,  Il Gyu KIM ,  Nam Suk LEE

IPC: H04W74/08 ,  H04W74/00

Abstract: A random access method, performed by a first terminal in a communication system, includes receiving, from a base station, PRACH configuration information including information on RA resource(s) used for transmission and reception of RA preamble(s) and RAR configuration information used for transmission and reception of RAR(s); transmitting a first RA preamble to the base station based on the information on the RA resource(s); when the first RA preamble is transmitted, performing a monitoring operation for receiving a first RAR that is a response to the first RA preamble; and selecting the first RAR for the first terminal from one or multiple RARs using the RAR configuration information in the monitoring operation.

公开(公告)号：US20180331796A1

公开(公告)日：2018-11-15

申请号：US16042838

申请日：2018-07-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yu Ro LEE ,  Jae Woo PARK ,  Jae Seung LEE ,  Jee Yon CHOI ,  Il Gyu KIM ,  Seung Chan BANG

IPC: H04L5/00 ,  H04L27/26 ,  H04B17/336 ,  H04B7/06 ,  H04B7/0452 ,  H04B7/024

CPC classification number: H04L5/005 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0617 ,  H04B17/336 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0073 ,  H04L27/2613

Abstract: Disclosed are a frame transmission method and a communication device performing the same. The communication device may transmit a null data packet (NDP)-announcement (NDP-A) including information on a plurality of communication devices participating in interference alignment and transmit an NDP including a common signal field and a common training field commonly applied to the plurality of communication devices.

公开(公告)号：US20180160366A1

公开(公告)日：2018-06-07

申请号：US15890114

申请日：2018-02-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kap Seok CHANG ,  Il Gyu KIM ,  Hyeong Geun PARK ,  Young Jo KO ,  Hyo Seok Yl ,  Chan Bok JEONG ,  Young Hoon KIM ,  Seung Chan BANG

IPC: H04W48/16 ,  H04L27/26 ,  H04B7/26 ,  H04W72/04 ,  H04W56/00 ,  H04L7/04 ,  H04J11/00 ,  H04B1/7073 ,  H04W88/08

CPC classification number: H04W48/16 ,  H04B1/70735 ,  H04B7/2656 ,  H04J11/0069 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/2655 ,  H04W56/00 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/08

Abstract: The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

公开(公告)号：US20170353953A1

公开(公告)日：2017-12-07

申请号：US15609748

申请日：2017-05-31

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Bing HUI ,  Junhyeong KIM ,  Yeong Jin KIM ,  Il Gyu KIM ,  Hee Sang CHUNG

IPC: H04W72/04 ,  H04W74/08 ,  H04L29/08

CPC classification number: H04W74/0833 ,  H04W56/00

Abstract: A method for transmitting and receiving a signal using steps of transmitting an uplink signal to a base station in a duration of an uplink pilot time slot (UpPTS) of a special subframe, and waiting for a guard time (GT) before receiving a downlink signal from the base station after the transmission of the uplink signal, and a terminal transmitting and receiving a signal by using the method.

公开(公告)号：US20170033447A1

公开(公告)日：2017-02-02

申请号：US15292897

申请日：2016-10-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Eun HONG ,  Moon Sik LEE ,  Young Seog SONG ,  Jun Hwan LEE ,  Eun Young CHOI ,  Il Gyu KIM ,  Seung Chan BANG

IPC: H01Q1/24 ,  H04W36/00 ,  H04W16/28 ,  H01Q21/06

CPC classification number: H01Q21/061 ,  H01Q1/246 ,  H01Q21/065 ,  H01Q21/205 ,  H01Q21/22 ,  H01Q21/26 ,  H04B7/0617 ,  H04W16/28 ,  H04W36/0072

Abstract: There are provided an antenna apparatus and a method of handover using the antenna apparatus. The antenna apparatus may comprise a plurality of antenna elements forming a plurality of beams in a predetermined service area. The plurality of antenna elements are arranged in a plurality of rows, and a number of antenna elements included in an uppermost row of the plurality of rows is smaller than a number of antenna elements included in a downmost row of the plurality of rows, and differences between center angles of beams formed by the antenna elements included in the downmost row are larger than differences between center angles of beams formed by the antenna elements included in the uppermost row.

Abstract translation: 提供了使用天线装置的天线装置和切换方法。 天线装置可以包括在预定的服务区域中形成多个波束的多个天线元件。 多个天线元件被布置成多行，并且包括在多行的最上行中的多个天线元件小于多行中的最下行中包括的天线元件的数量，并且差异 包括在最下排中的天线元件形成的光束的中心角之间的差大于由最上面的行中包括的天线元件形成的光束的中心角之间的差。

公开(公告)号：US20160149619A1

公开(公告)日：2016-05-26

申请号：US14937960

申请日：2015-11-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seok Ho WON ,  Seyoung CHO ,  Suchang CHAE ,  Il Gyu KIM ,  Seung Chan BANG

IPC: H04B7/04 ,  H04L5/00

CPC classification number: H04B7/046 ,  H04B7/0417 ,  H04B7/0669

Abstract: A transmitter generates a first precoding vector for a first virtual antenna port among a plurality of virtual antenna ports using a first sequence having a constant magnitude and a discrete Fourier transform (DFT) vector sequence in a time domain and a frequency domain. The transmitter generates a plurality of second precoding vectors for the remaining virtual antenna port, except for the first virtual antenna port of the plurality of virtual antenna ports by circular shifting the first precoding vector. The transmitter maps a plurality of first data streams for the plurality of virtual antenna ports to a plurality of physical antenna ports using the first precoding vector and the plurality of second precoding vectors.

Abstract translation: 发射机使用具有恒定幅度的第一序列和在时域和频域中的离散傅里叶变换（DFT）矢量序列来生成多个虚拟天线端口中的第一虚拟天线端口的第一预编码矢量。 发射机通过循环移位第一预编码矢量，除了多个虚拟天线端口中的第一虚拟天线端口之外，为剩余的虚拟天线端口生成多个第二预编码向量。 发射机使用第一预编码向量和多个第二预编码向量将多个虚拟天线端口的多个第一数据流映射到多个物理天线端口。

公开(公告)号：US20160127086A1

公开(公告)日：2016-05-05

申请号：US14926635

申请日：2015-10-29

Applicant: Electronics and Telecommunications Research Institute

Inventor： Eun-Young CHOI ,  Seung Eun HONG ,  Il Gyu KIM ,  Seung Chan BANG

IPC: H04L5/00 ,  H04W36/00 ,  H04W52/32 ,  H04W72/04

CPC classification number: H04L5/0007 ,  H04W36/0072 ,  H04W52/143 ,  H04W52/281 ,  H04W52/325

Abstract: A method and apparatus for transmitting a signal to a terminal are provided. The method includes: determining at least one of a plurality of resource blocks (RBs) of a frequency resource and a time resource in a subframe that transmits to the terminal; allocating a power rate to each of a first signal and a second signal to transmit to the terminal; and transmitting the first signal and the second signal through the RB according to the allocated power rate.

Abstract translation: 提供了一种用于向终端发送信号的方法和装置。 该方法包括：确定发送到终端的子帧中的频率资源和时间资源的多个资源块（RB）中的至少一个; 向第一信号和第二信号中的每一个分配功率速率以发送到终端; 并根据分配的功率率通过RB发送第一信号和第二信号。

公开(公告)号：US20160043787A1

公开(公告)日：2016-02-11

申请号：US14817259

申请日：2015-08-04

Applicant: Electronics and Telecommunications Research Institute

Inventor： Yu Ro LEE ,  Jae Woo PARK ,  Jae Seung LEE ,  Jee Yon CHOI ,  Il Gyu KIM ,  Seung Chan BANG

IPC: H04B7/04 ,  H04W72/04 ,  H04W16/28

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04B7/0626 ,  H04W72/0453 ,  H04W72/085

Abstract: Disclosed are a frame transmission method using a selective beamforming and a communication apparatus to perform the frame transmission method. The communication apparatus may determine a beamforming matrix based on classification information in which a plurality of subcarriers used for communication is classified into a plurality of frequency units, may map a long training field (LTF) sequence to the beamforming matrix, and transmit a beamforming training (BF-T) frame including the mapped LTF sequence to a plurality of stations, may receive, from the plurality of stations having receiving the BF-T frame, feedback information generated based on a reception strength of the BF-T frame, and may allocate frequency units to data frames to be transmitted to the plurality of stations based on the feedback information, and transmit the data frames using the allocated frequency units. The reception strength of the BF-T frame may be determined at each station for each frequency unit.

Abstract translation: 公开了使用选择波束成形的帧发送方法和通信装置来执行帧发送方法。 通信装置可以基于将用于通信的多个子载波分类为多个频率单位的分类信息来确定波束形成矩阵，可以将长训练场（LTF）序列映射到波束成形矩阵，并且发送波束成形训练 包括映射的LTF序列的多个（BF-T）帧可以从接收到BF-T帧的多个站接收基于BF-T帧的接收强度生成的反馈信息，并且可以 基于所述反馈信息，将频率单位分配给要发送到所述多个站的数据帧，并且使用所分配的频率单位来发送所述数据帧。 BF-T帧的接收强度可以针对每个频率单元在每个站点确定。

公开(公告)号：US20140293853A1

公开(公告)日：2014-10-02

申请号：US14224723

申请日：2014-03-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Dae Soon CHO ,  Choon Woo SHIN ,  Il Gyu KIM

IPC: H04W56/00 ,  H04W52/02

CPC classification number: H04W56/0045 ,  H04W52/0212 ,  Y02D70/1262 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/21 ,  Y02D70/22

Abstract: A method for transmitting machine type communication (MTC) data and an apparatus therefor are disclosed. A method for transmitting data in a MTC device located in a mobile communication system may comprise estimating an absolute position of the MTC device, receiving an awake message, extracting downlink synchronization information and absolute positional information of a base station included in the awake message, estimating a transmission delay time between the MTC device and the base station, and transmitting signal to the base station based on the transmission delay time and the downlink synchronization information. Therefore, a problem of uplink interferences between terminals and a base station due to a MTC device, which can be generated in supporting MTC services for a conventional cellular communication system, may be resolved.

Abstract translation: 公开了一种用于发送机器类型通信（MTC）数据的方法及其装置。 一种用于在位于移动通信系统中的MTC设备中发送数据的方法可以包括估计MTC设备的绝对位置，接收唤醒消息，提取下行链路同步信息和包括在唤醒消息中的基站的绝对位置信息，估计 MTC设备和基站之间的传输延迟时间，以及基于传输延迟时间和下行链路同步信息向基站发送信号。 因此，可以解决由常规蜂窝通信系统支持MTC服务而产生的MTC设备的终端与基站之间的上行链路干扰的问题。