公开(公告)号：KR20070099477A

公开(公告)日：2007-10-09

申请号：KR20070032811

申请日：2007-04-03

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM IL GYU ,  PARK HYEONG GEUN ,  CHANG KAP SEOK ,  KO YOUNG JO ,  YI HYO SEOK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN ,  KIM NAM IL

IPC: H04L27/26 ,  H04B7/26 ,  H04J11/00

CPC classification number: H04J11/0069 ,  H04B7/2621

Abstract: A cell searching method in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system, a frame transmitting method, and a frame transmitter are provided to reduce a cell searching time in the OFDM cellular system by reducing a configuration complexity of a cell searching unit. A synchronization detector(622) includes correlation calculators(701-A,701-B), a signal coupler(702), an accumulation unit(703), and a timing detector(710). Outputs from the correlation calculators are accumulated in the accumulation unit through the signal coupler. The correlation calculator generates 4800 units in respective synchronization blocks. The timing detector detects a position of a sample having a peak value from correlation values, and determines the detector sample position as synchronous channel symbol timing. The accumulation unit adds the respective correlation values for the sample positions to the correlation value corresponding to a position, which is spaced from the respective sample positions by a length of the synchronization block.

Abstract translation: 提供OFDM（正交频分复用）蜂窝系统，帧发送方法和帧发送机中的小区搜索方法，通过减小小区搜索单元的配置复杂度来减少OFDM蜂窝系统中的小区搜索时间。 同步检测器（622）包括相关计算器（701-A，701-B），信号耦合器（702），累积单元（703）和定时检测器（710）。 来自相关计算器的输出通过信号耦合器累积在累积单元中。 相关计算器在相应的同步块中产生4800个单元。 定时检测器从相关值检测具有峰值的样本的位置，并将检测器采样位置确定为同步信道符号定时。 累积单元将样本位置的各个相关值相加于与各个采样位置间隔一个同步块的长度的位置相对应的相关值。

公开(公告)号：EP2533468A4

公开(公告)日：2014-03-26

申请号：EP11740048

申请日：2011-02-07

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KWON HYOUNG JIN ,  KIM YONG SUN ,  JIN SUNG GEUN ,  CHANG KAP SEOK ,  HONG SEUNG EUN ,  LEE WOO YONG ,  CHUNG HYUN KYU

IPC: H04L12/28 ,  H04B7/155 ,  H04L5/14 ,  H04W76/04

CPC classification number: H04B7/15557 ,  H04B7/1555 ,  H04L5/14 ,  H04L45/22 ,  H04W24/00 ,  H04W24/08 ,  H04W72/02 ,  H04W84/047

Abstract: A communication method of a source device according to am embodiment includes detecting a status of a first link directly connected from the source device to a destination device or a status of a second link connected from the source device to the destination device via a relay device, selecting any one of the first link and the second link based on a result of the detection, and transmitting data using the selected link.

公开(公告)号：EP2538581A4

公开(公告)日：2013-09-04

申请号：EP11744876

申请日：2011-02-16

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP SEOK ,  KWON HYOUNG JIN ,  KIM YONG SUN ,  HONG SEUNG EUN ,  JIN SUNG GEUN ,  LEE WOO YONG ,  CHUNG HYUN KYU

IPC: H04B7/14 ,  H04W40/22

CPC classification number: H04B7/15528 ,  H04B7/15592 ,  H04B7/2606 ,  H04W40/22 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/39 ,  Y02D70/446 ,  Y02D70/449

Abstract: The present invention provides a wireless communication method used for transmitting and receiving a relay in a wireless local area network system. The wireless local area network system according to an embodiment of the present invention relates to a wireless communication method of setting a relay link through a relay and setting a transmission time point at which a data frame is transmitted in a source device by recognizing a propagation delay between devices, and the like when an operation mode of the set relay corresponds to a cooperating mode.

公开(公告)号：EP2127155A4

公开(公告)日：2010-10-27

申请号：EP08778752

申请日：2008-07-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP SEOK ,  KIM IL GYU ,  PARK HYEONG GEUN ,  KO YOUNG JO ,  YI HYO SEOK ,  LEE MOON SIK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN

IPC: H04B7/26 ,  H04L27/26

CPC classification number: H04W56/00 ,  H04J11/0069 ,  H04J11/0076 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

公开(公告)号：EP2127156A4

公开(公告)日：2010-08-04

申请号：EP08778753

申请日：2008-07-11

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP SEOK ,  KIM IL GYU ,  PARK HYEONG GEUN ,  KO YOUNG JO ,  YI HYO SEOK ,  LEE MOON SIK ,  KIM YOUNG HOON ,  BANG SEUNG CHAN

IPC: H04B7/26 ,  H04L27/26

CPC classification number: H04W56/00 ,  H04J11/0069 ,  H04J11/0076 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662