公开(公告)号：EP2506450A4

公开(公告)日：2012-11-07

申请号：EP10833555

申请日：2010-11-24

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM YUN-JOO ,  LEE JAE-SEUNG ,  LEE SOK-KYU

IPC: H04B7/04 ,  H04W4/08 ,  H04W8/18

CPC classification number: H04B7/0452 ,  H04W4/08 ,  H04W8/186 ,  H04W84/12

Abstract: The present invention relates to methods for transmitting a frame by grouping a plurality of wireless terminals in a multiuser based wireless communication system. The present invention includes a method for transmitting a frame by including information about multiple receiver terminals in a MAC frame, another method for transmitting a frame by allocating group addresses and then using a corresponding group address for frame transmission, and yet another method for transmitting a frame by using a unique group sequence number that is allocated to each group and group control information that contains bitmap information. The group control information is included in a destination address field of a MAC layer, or in a signal field of a physical layer, or in both the MAC layer and the physical layer.

公开(公告)号：EP2496010A4

公开(公告)日：2013-11-06

申请号：EP10827154

申请日：2010-10-30

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE YU-RO ,  SON JUNG-BO ,  LEE SOK-KYU

IPC: H04W28/06 ,  H04B7/04 ,  H04L5/00 ,  H04W48/08 ,  H04W84/12

CPC classification number: H04W72/0406 ,  H04B7/0452 ,  H04L1/007 ,  H04L1/0072 ,  H04L1/0606 ,  H04L1/0612 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0073 ,  H04W28/04 ,  H04W28/06 ,  H04W28/22 ,  H04W48/08 ,  H04W80/04 ,  H04W84/12

Abstract: The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result.

公开(公告)号：EP1698121A4

公开(公告)日：2012-08-01

申请号：EP04808600

申请日：2004-12-27

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE WOO-YONG ,  LEE SOK-KYU

IPC: H04L12/56 ,  H04L27/26 ,  H04L12/28 ,  H04L25/02

CPC classification number: H04L27/2656 ,  H04L7/10 ,  H04L25/0202 ,  H04L25/0226 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2628 ,  H04L27/2662 ,  H04L27/2663 ,  H04W56/001 ,  H04W84/12

Abstract: A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz a wireless local area network system, the method comprising arranging a short preamble having a plurality of repetitive S symbols, and an IS symbol, and arranging a long preamble having a long cyclic prefix (CP) and a plurality of L symbols for frame synchronization and symbol timing by performing auto-correlation according to the length of window of the auto-correlation.

Abstract translation: 一种在无线局域网系统的60GHz的数据帧发送中配置用于同步的下行链路帧的前导码的方法，所述方法包括：布置具有多个重复S符号的短前导码和IS符号，并且将 具有长循环前缀（CP）的长前导码和用于帧同步和符号定时的多个L个符号，通过根据自相关的窗口的长度执行自相关。

公开(公告)号：EP1829312A4

公开(公告)日：2009-11-25

申请号：EP05726596

申请日：2005-02-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： YU HEE-JUNG ,  JEON TAEHYUN ,  KIM MYUNG-SOON ,  CHOI EUN-YOUNG ,  LEE SOK-KYU ,  LYU DEUK-SU

IPC: H04J99/00 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04W28/065 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0059 ,  H04L1/0071 ,  H04L1/0618 ,  H04L5/003 ,  H04L5/0044 ,  H04L5/0048 ,  H04L27/2602 ,  H04L27/2613 ,  H04W84/12

公开(公告)号：EP2506451A4

公开(公告)日：2013-06-05

申请号：EP10833558

申请日：2010-11-24

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM YUN-JOO ,  LEE JAE-SEUNG ,  LEE SOK-KYU

IPC: H04B7/04 ,  H04L1/06 ,  H04L1/16 ,  H04L1/18

CPC classification number: H04B7/0452 ,  H04L1/06 ,  H04L1/1685 ,  H04L1/1848

Abstract: The present invention relates to a method for recovering a frame that failed to be transmitted to a plurality of wireless terminals by using a group number in a MU-MIMO (Multi-User Multiple Input Multiple Output) based wireless communication system. Following the transmission of a frame that requests for a response including group control information to the plurality of wireless terminals, if a response frame is not normally received from a particular wireless terminal, a request frame is transmitted to the wireless terminal that has failed to receive the response frame as a destination, after a period of time for receiving the response frame from each of the plurality of wireless terminals that consists of a group. In another embodiment of the present invention, if the response frame is not normally received from a particular wireless terminal, a request frame is transmitted to wireless terminals starting from the wireless terminal that has failed to receive the response frame down to the last wireless terminal, in accordance with the transmission order of the response frame.

公开(公告)号：EP2547002A4

公开(公告)日：2013-01-16

申请号：EP11753658

申请日：2011-03-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： OH JONG-EE ,  CHEONG MINHO ,  LEE SOK-KYU

IPC: H04B7/04 ,  H04L1/00 ,  H04L1/08

CPC classification number: H04B7/0452 ,  H04B7/0413 ,  H04L1/0083 ,  H04L1/0643 ,  H04L1/08 ,  H04L5/0007 ,  H04L5/003 ,  H04W28/06 ,  H04W84/12

Abstract: The present invention relates to a method and apparatus for transmitting and receiving data. A data transmission method from a sender terminal to a receiver terminal in a MIMO system using a variable frequency band according to one embodiment of the present invention comprises: repeatedly generating a signal field depending on a frequency band that is applied to the transmission of a data frame; generating a data field including the data; generating a data frame including the signal field and the data field; and transmitting the data frame to the receiver terminal. The present invention is advantageous in that a signal field which is transmitted together with the data being transmitted from the sender terminal to the receiver terminal in the MIMO system can be sent more efficiently.

公开(公告)号：EP2496029A4

公开(公告)日：2013-01-16

申请号：EP10827110

申请日：2010-10-28

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE IL-GU ,  LEE SOK-KYU ,  CHUNG HYUN-KYU ,  KIM DAE-SIK

IPC: H04W52/58 ,  H04W52/02 ,  H04W52/26

CPC classification number: H04W52/262 ,  H04B7/0626 ,  H04L1/1671 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0229 ,  Y02B60/50 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/26

Abstract: The present invention relates to a method for increasing the resource utilization rate and reducing power consumption in a high-speed wireless communication system and a control device. The method according to one embodiment of the present invention comprises a process for efficient utilization of a frequency band by including channel state information and data frame mode information in a request frame or an ack frame, before transmission in a wireless communication system. The method according to one embodiment of the present invention relates to a power saving method in a wireless communication system having at least two different transmission modes, the method comprising: a process of setting a mode in such a manner that a control frame is received in a mode with the lowest sampling speed out of three different modes available and then receiving the control frame in the set mode; and a process of setting a mode, after receiving the control frame, in such a manner that a data packet is transmitted / received in a mode with the highest transmission rate and then transmitting / receiving the data packet in the set mode.

公开(公告)号：EP2506452A4

公开(公告)日：2016-10-26

申请号：EP10833562

申请日：2010-11-24

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM YUN-JOO ,  CHOI JEEYON ,  LEE SOK-KYU

IPC: H04B7/04 ,  H04W74/00 ,  H04W84/12

CPC classification number: H04W72/0413 ,  H04L1/1854 ,  H04W28/04 ,  H04W72/0446 ,  H04W74/002 ,  H04W74/004 ,  H04W74/006 ,  H04W84/12

Abstract: The present invention relates to a method for efficient transmission of a request frame such as an RTS/CTS frame and a response frame in response to the request frame in a multi-user based wireless communication system. The method of the present invention comprises: a process where wireless terminals transmit a response frame at their own response frame transmission time through a request frame that contains information about a plurality of wireless terminals and information about the response frame transmission time of the respective wireless terminals; a process where the respective wireless terminals transmit a response frame according to a token scheme such that the response frame is transmitted to a final access point; and a process where only a representative wireless terminal selected depending on a given wireless environment receives the response frame.

公开(公告)号：EP2493129A4

公开(公告)日：2016-06-08

申请号：EP10825185

申请日：2010-10-20

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHOI JEEYON ,  KIM YUN-JOO ,  LEE SOK-KYU

IPC: H04L29/12 ,  H04W4/08 ,  H04W84/12

CPC classification number: H04W4/08 ,  H04L61/2069 ,  H04W8/186 ,  H04W8/26 ,  H04W84/12

公开(公告)号：EP2547001A4

公开(公告)日：2013-03-06

申请号：EP11753656

申请日：2011-03-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK JAEWOO ,  OH JONG-EE ,  LEE IL-GU ,  LEE SOK-KYU ,  CHEONG MINHO ,  CHOI JEEYON ,  LEE JAE-SEUNG ,  KIM YUN-JOO

IPC: H04B7/04 ,  H04L1/00

CPC classification number: H04B7/0452 ,  H04B7/0413 ,  H04L1/0003 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/0075 ,  H04L1/0083 ,  H04L1/08 ,  H04L27/18 ,  H04L27/20 ,  H04L69/22 ,  H04L69/323 ,  H04Q2213/13215 ,  H04W84/12

Abstract: The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.

Abstract translation: 本发明涉及一种收发数据的方法和装置。 根据本发明的一个实施例，发送终端在MIMO系统中向接收终端发送数据的方法包括以下步骤：生成包含数据的数据字段; 生成包含关于数据字段的信息的信号字段; 生成包含数据字段和信号字段的数据帧; 并将数据帧发送到接收终端。 根据本发明，在使用MIMO发送帧的通信系统中，正在发送的帧的末尾被准确地通知给接收终端，由此在接收终端处以更高效的方式解码帧。