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公开(公告)号：KR1020110059549A
公开(公告)日：2011-06-02
申请号：KR1020100118777
申请日：2010-11-26
Applicant: 한국전자통신연구원 , 동국대학교 산학협력단
CPC classification number: H04W40/22 , H04B7/15507 , H04J11/00 , H04L25/0224 , H04W16/26 , H04W24/10
Abstract: PURPOSE: A relaying method of performing selective delivery and a wireless communication system using the same are provided to reduce inter-neighbor cell interference due to unnecessary amplification through the selective delivery of a signal. CONSTITUTION: A BS(Base Station) transmits DL(DownLink) data to a terminal(S501). A relay unit detects the energy of the response signal of the terminal(S503). The relay unit reports information about the response signal of the terminal to the BS(S504). The BS decides the selectively delivery of a corresponding signal in the relay unit in the DL signal transmission to a corresponding terminal. The BS delivers information to the relay unit in advance before transmission of the DL signal(S505).
Abstract translation: 目的：提供一种执行选择性传送的中继方法和使用该方法的无线通信系统，以通过选择性传送信号来减少由于不必要的放大引起的邻居间干扰。 构成：BS（基站）向终端发送DL（DownLink）数据（S501）。 中继单元检测终端的响应信号的能量（S503）。 中继单元将关于终端的响应信号的信息报告给BS（S504）。 BS决定在DL信号传输中将中继单元中的对应信号选择性地传送到相应的终端。 在发送DL信号之前，BS预先向中继单元发送信息（S505）。
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公开(公告)号：KR1020110059544A
公开(公告)日：2011-06-02
申请号：KR1020100118603
申请日：2010-11-26
Applicant: 한국전자통신연구원 , 동국대학교 산학협력단
CPC classification number: H04B7/2606 , H04B7/15542
Abstract: PURPOSE: A relaying method for increasing the frequency-selective characteristic of a wireless channel and a relaying unit are provided to reduce interference for users located at the edge of a cell through amplification of only terminals within a coverage area thereof. CONSTITUTION: Each relay unit(200) establishes information about a relay target frequency band. The relay unit transmits a control signal including the information to one or more relay units. The one or more relay units extract the information about the frequency band within the control signal. According to the information, the one or more relay units amplify a signal. The one or more relay units transmit the amplified signal to one or more terminals(300).
Abstract translation: 目的：提供一种用于增加无线信道和中继单元的频率选择特性的中继方法，以通过仅对其覆盖区域内的终端进行放大来减少位于小区边缘的用户的干扰。 构成：每个中继单元（200）建立有关中继目标频带的信息。 中继单元将包括该信息的控制信号发送到一个或多个中继单元。 一个或多个中继单元提取关于控制信号内的频带的信息。 根据该信息，一个或多个中继单元放大信号。 一个或多个中继单元将放大的信号发送到一个或多个终端（300）。
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Patent Agency Ranking
公开(公告)号：KR1020080042679A
公开(公告)日：2008-05-15
申请号：KR1020070102609
申请日：2007-10-11
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2607 , H04L27/2636 , H04L27/2644 , H04W72/0453
Abstract: A transmitter and a transmission method for extending a guard interval for an individual user equipment in an OFDMA(Orthogonal Frequency Division Multiple Access) system are provided to enhance performance of a specific equipment and performances of other equipments by extending the guard interval for the specific equipment. A transmitter for extending a guard interval for an individual user equipment in an OFDMA system includes a guard interval expansion processor(44), an up-sampling processing device(45), an interpolator(46), and a cyclic prefix(CP) inserting device(48). The guard interval expansion processor creates symbols having an extended guard interval by extending a guard interval for data to be transmitted to equipments estimated to have large delay spread and a large timing error on the basis of distance information between a base station and the equipment. The up-sampling processing device receives the symbols outputted from the guard interval extending processing device and performs up-sampling. The interpolator performs interpolation for the symbols up-sampled by the up-sampling processing device. The cyclic prefix inserting device inserts a cyclic prefix symbol into output data of a parallel/serial converter(47).
Abstract translation: 提供了一种用于在OFDMA（正交频分多址）系统中扩展单个用户设备的保护间隔的发射机和传输方法，以通过扩展特定设备的保护间隔来增强特定设备的性能和其他设备的性能 。 用于在OFDMA系统中为单个用户设备延长保护间隔的发射机包括保护间隔扩展处理器（44），上采样处理设备（45），内插器（46）和循环前缀（CP）插入 装置（48）。 保护间隔扩展处理器通过基于基站和设备之间的距离信息，将估计为具有大的延迟扩展的设备和大的定时误差扩展到要发送的数据的保护间隔来创建具有扩展保护间隔的符号。 上采样处理装置接收从保护间隔延长处理装置输出的符号，并进行上采样。 内插器对由上采样处理装置上采样的符号执行插值。 循环前缀插入装置将循环前缀符号插入到并行/串行转换器（47）的输出数据中。
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公开(公告)号：KR100901760B1
公开(公告)日：2009-06-11
申请号：KR1020070113568
申请日：2007-11-08
Applicant: 한국전자통신연구원 , 동국대학교 산학협력단
CPC classification number: H04L1/206
Abstract: 순환 지연 다이버시티(CDD, cyclic delay diversity)에 관한 것으로서, 특히 최적의 순환 지연 값을 갖는 순환 지연 다이버시티 방법 및 장치를 개시한다.
다이버시티 차수에 따른 신호대잡음간섭 함수를 결정하는 단계와, 채널 추정 오류 분산 함수를 결정하는 단계 및 상기 신호대잡음간섭 함수 및 채널 추정 오류 분산 함수에 따라서 시스템에 요구되는 SINR을 결정하는 단계를 포함하는 최적의 순환 지연 값을 결정하는 방법을 제공한다.
CDD(cyclic delay diversity), SINR, 순환 지연,-
公开(公告)号：KR1020080042680A
公开(公告)日：2008-05-15
申请号：KR1020070102610
申请日：2007-10-11
Applicant: 한국전자통신연구원
CPC classification number: H04L5/0007 , H04J11/00 , H04L5/0028 , H04L5/0048 , H04L25/0226 , H04L27/0008 , H04L27/2607 , H04L27/262 , H04L27/261 , H04L27/2628
Abstract: An apparatus and a method of pilot transmission to coexist OFDMA(Orthogonal Frequency Division Multiple Access) and SC-FDMA(Single Carrier-Frequency Division Multiple Access) are provided to use a pilot of a proper form according to a channel environment by allowing a pilot incorporated in an SC-FDMA symbol to have a flexible pattern. An apparatus of pilot transmission to coexist OFDMA and SC-FDMA includes a pilot inserting device(63), an up-sampling processing device(65), an interpolation processor(66), and a cyclic prefix(CP) inserting device(68). The pilot inserting device inserts a pilot into a symbol by receiving pilot information. The up-sampling processing device performs up-sampling parallel data inputted from a serial/parallel converter(64). The interpolation processor performs interpolation for symbols up-sampled by the up-sampling processing device. The cyclic prefix inserting device inserts a cyclic prefix symbol into output data of a parallel/serial converter(67).
Abstract translation: 提供了一种用于共存OFDMA（正交频分多址）和SC-FDMA（单载波 - 频分多址）的导频传输的装置和方法，以便根据信道环境使用适当形式的导频， 并入SC-FDMA符号以具有灵活的图案。 用于共存OFDMA和SC-FDMA的导频传输装置包括导频插入装置（63），上采样处理装置（65），内插处理器（66）和循环前缀（CP）插入装置（68） 。 导频插入装置通过接收导频信息将导频插入符号。 上采样处理装置执行从串行/并行转换器（64）输入的并行数据并行数据。 内插处理器对由上采样处理装置进行上采样的符号进行插值。 循环前缀插入装置将循环前缀符号插入到并行/串行转换器（67）的输出数据中。
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公开(公告)号：KR1020140065355A
公开(公告)日：2014-05-29
申请号：KR1020130141833
申请日：2013-11-21
Applicant: 한국전자통신연구원
IPC: H04W72/02
CPC classification number: H04W72/02 , H04W4/70 , H04W72/082 , H04W76/14
Abstract: Disclosed are a method and apparatus for direct communication between terminals. The method for direct communication between terminals includes the steps of: setting a plurality of wireless resources which are dispersedly located on a frequency axis; and transmitting data to a second terminal by using the wireless resources. Therefore, interference due to cellular communication is reduced.
Abstract translation: 公开了一种用于在终端之间直接通信的方法和装置。 终端之间的直接通信方法包括以下步骤：设置分散地位于频率轴上的多个无线资源; 以及通过使用无线资源向第二终端发送数据。 因此，由于蜂窝通信引起的干扰降低。
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17.发明授权
公开(公告)号：KR100911208B1
公开(公告)日：2009-08-06
申请号：KR1020070132111
申请日：2007-12-17
Applicant: 한국전자통신연구원 , 동국대학교 산학협력단
Abstract: ＯＦＤＭＡ 시스템에서 사용자간 시공간 블록 부호화와 순환 지연 다이버시티를 동시 사용하는 기지국 및 단말기가 개시된다. OFDMA 시스템에서 사용자간 시공간 블록 부호화와 순환 지연 다이버시티를 동시 사용하는 기지국은 데이터 전송을 원하는 복수의 사용자 단말 각각에 관한 채널의 주파수 선택적 특성에 따라 상기 사용자 단말 각각에 적합한 송신 다이버시티 방안을 결정하는 다이버시티 결정부, 상기 사용자 단말 각각으로 상기 결정된 송신 다이버시티 방안을 지시하는 다이버시티 지시부 및 상기 사용자 단말로부터 상기 송신 다이버시티 방안에 따라 상기 데이터를 수신하는 데이터 수신부를 포함한다.
다이버시티, 시공간 블록 부호화, 순환 지연 다이버시티, STBC, CDD, MIMO, OFDMA, 상향링크
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