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公开(公告)号：KR1020170014421A
公开(公告)日：2017-02-08
申请号：KR1020150107786
申请日：2015-07-30
Applicant: 한국전자통신연구원
Abstract: 본발명의실시예에따른소형셀기지국시스템에서이동단말식별자관리방법은소형셀기지국시스템에서통신을위한이동단말식별자관리방법에있어서, 상기소형셀기지국시스템에서의통신을위한메시지에이동단말설정정보의식별자를포함하여송신하는단계; 상기소형셀기지국시스템에서메시지수신시 메시지내에포함된이동단말설정정보의식별자를추출하는단계; 및상기이동단말설정정보의식별자로부터이동단말설정정보를획득하는단계를포함할수 있다.
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公开(公告)号：KR1020170004061A
公开(公告)日：2017-01-11
申请号：KR1020150093891
申请日：2015-07-01
Applicant: 한국전자통신연구원
Abstract: 본발명의다양한실시예에따른단말의상향링크시간동기수행방법은, 부시간전진그룹(secondary timing advance group)이상향링크비동기상태에서, 기지국으로부터부 시간전진그룹의서빙셀을위한상향링크승인(uplink grant) 정보를포함하는물리하향링크제어채널(physical downlink control channel)이수신되면경쟁기반랜덤액세스프리앰블(random access preamble)을선택하는단계및 선택된랜덤액세스프리앰블을이용하여랜덤액세스절차를진행하는단계를포함할수 있다.
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公开(公告)号：KR101558887B1
公开(公告)日：2015-10-13
申请号：KR1020080001424
申请日：2008-01-04
CPC classification number: H04L27/2607 , H04L69/323 , H04W74/006
Abstract: 본발명은무선통신시스템중 확장셀 (Extended Cell) 환경에서프리앰블구조를형성하기위해, (a) 최대지연확산과확장셀 반경에따른최대왕복지연시간을합한길이의 CP(Cyclic Prefix)를생성하는단계; 및 (b) 기본랜덤액세스프리앰블구조에서사용된프리앰블시퀀스파트와동일한길이의프리앰블시퀀스파트를생성하는단계;를포함하는랜덤액세스프리앰블생성방법을제시한다.
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公开(公告)号：KR101453882B1
公开(公告)日：2014-10-23
申请号：KR1020070135233
申请日：2007-12-21
Abstract: 본 발명은 스케일러블 대역폭을 지원하는 OFDM 기반 통신 시스템에서 랜덤 액세스 채널의 할당 방법 및 랜덤 액세스 방법을 개시한다.
특히 본 발명은 특정 송신 대역폭을 갖는 하나의 단말이 각기 다른 수신 대역폭을 갖는 다양한 기지국으로 랜덤 액세스하는 방법과 기지국이 단말의 프리앰블 전송을 위해 사용하는 랜덤 액세스 채널을 할당하는 방법을 개시한다.
스케일러블 대역폭, 랜덤 액세스 채널, 랜덤 액세스 프리앰블, 3GPP LTE-
公开(公告)号：KR1020130067636A
公开(公告)日：2013-06-25
申请号：KR1020110134395
申请日：2011-12-14
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2627
Abstract: PURPOSE: A base station modem transmission device is provided to reduce loss according to additional resource use and processing time following to individual operation of an encoder and a modulator. CONSTITUTION: A layer 2 interface and modem transmission unit control device(100) processes and supplies necessary information to an encoding and modulation device(200) using information supplied from a layer 2 and a downlink logic channel. The encoding and modulation device mixes encoding and modulation functions suitable for each transmitted channel by downlink physical channel and downlink physical signal and transmits the mixed information to a resource allocation and OFDM(Orthogonal Frequency Division Multiplexing) processing unit. The resource allocation and OFDM processing unit locates a region to a corresponding subcarrier transmitted with respect to the each downlink physical channel and the each downlink physical signal and a time fitting with the same. The resource allocation and OFDM processing unit sequentially performs a process of guard band insertion, IFFT and cyclic prefix addition and transmits the data to an RF device. [Reference numerals] (100) Layer 2 interface and modern transmission unit; (AA) Base modem transmission unit(LTE-Advanced System)
Abstract translation: 目的：提供基站调制解调器传输设备，以根据编码器和调制器的单独操作后的附加资源使用和处理时间来减少损耗。 构成：使用从层2和下行链路逻辑信道提供的信息，层2接口和调制解调器传输单元控制设备（100）处理并向编码和调制设备（200）提供必要的信息。 编码和调制装置通过下行物理信道和下行物理信号混合适用于每个发送信道的编码和调制功能，并将混合信息发送到资源分配和OFDM（正交频分复用）处理单元。 资源分配和OFDM处理单元将区域定位到相对于每个下行链路物理信道和每个下行链路物理信号发送的相应子载波和与其相适应的时间。 资源分配和OFDM处理单元顺序执行保护带插入，IFFT和循环前缀相加处理，并将数据发送到RF设备。 （附图标记）（100）二层接口和现代传输单元; （AA）基本调制解调器传输单元（LTE-Advanced系统）
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Patent Agency Ranking
公开(公告)号：KR1020110068790A
公开(公告)日：2011-06-22
申请号：KR1020100047605
申请日：2010-05-20
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2695 , H04L27/2636
Abstract: PURPOSE: An apparatus and method for estimating a channel in a frequency domain are provided to estimate a channel using a cell specified reference signal and a user specified reference signal. CONSTITUTION: A data receiving unit(200) receives data by including a plurality of antennas. The data receiving unit converts a received RF band signal into a baseband signal. A CP(Cyclic Prefix) is removed from the converted signal. A frequency selection degree obtaining unit(210) obtains a frequency selection degree of received data. The frequency selection degree obtaining unit includes a noise signal distribution calculating unit(214) and a signal to noise ratio calculating unit(216). The signal to noise ratio calculating unit calculates a signal to noise ratio using a channel frequency response. A channel estimating unit(220) estimates a channel frequency response by a selected channel estimating technique.
Abstract translation: 目的：提供用于估计频域中的信道的装置和方法，以使用小区指定的参考信号和用户指定的参考信号来估计信道。 构成：数据接收单元（200）通过包括多个天线来接收数据。 数据接收单元将接收的RF频带信号转换为基带信号。 从转换的信号中移除CP（循环前缀）。 频率选择度获取单元（210）获得接收数据的频率选择程度。 频率选择度获取单元包括噪声信号分布计算单元（214）和信噪比计算单元（216）。 信噪比计算单元使用信道频率响应来计算信噪比。 信道估计单元（220）通过所选择的信道估计技术估计信道频率响应。
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公开(公告)号：KR1020100069352A
公开(公告)日：2010-06-24
申请号：KR1020080128013
申请日：2008-12-16
Applicant: 한국전자통신연구원
CPC classification number: H04L25/0202 , H04L27/2628 , H04L27/2636
Abstract: PURPOSE: A method and an apparatus for efficient frequency offset estimation are provided to implement the characteristics robust over a noise and an interference by estimating a frequency through a reference signal having a correlation property. CONSTITUTION: A correlation unit(102) determines the correlation of a received signal, and an IFFT(Inverse Fast Fourier Transform) unit(103) converts the signal for which the correlation is determined to a time domain signal. A gating unit(104) gates the time domain signal. An FFT(Fast Fourier Transform) unit reconverts the signal into a frequency domain by applying the FFT to the gated signal. An offset estimator(106) estimates the offset based on frequency domain.
Abstract translation: 目的：提供一种用于高效率频偏估计的方法和装置，以通过具有相关属性的参考信号估计频率来实现噪声和干扰鲁棒的特性。 构成：相关单元（102）确定接收信号的相关性，并且IFFT（快速傅里叶逆变换）单元（103）将确定了相关的信号转换为时域信号。 选通单元（104）对时域信号进行门控。 FFT（快速傅里叶变换）单元通过对门控信号应用FFT将信号重新转换为频域。 偏移估计器（106）基于频域来估计偏移。
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公开(公告)号：KR1020100034870A
公开(公告)日：2010-04-02
申请号：KR1020080094079
申请日：2008-09-25
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0026 , H04B7/0417 , H04B7/063 , H04B7/0632 , H04B7/0639 , H04B7/0643 , H04B7/0645 , H04B7/066 , H04B7/0689 , H04L1/0009 , H04L1/0027 , H04W88/10 , H04W72/0413 , H04B7/0456
Abstract: PURPOSE: A multiple antenna wireless communication system for determining an adaptable downlink transmission mode are provided to maximize data transmission rate by selecting a down link transmission mode adaptably. CONSTITUTION: A base station decides a downlink transmission mode. The base station selects the type of feedback information. The base station offers the type of feedback information to a terminal. The terminal creates the feedback information. The terminal periodically offers the feedback information to the base station. The base station offers the feedback time information to the terminal. The terminal offers the feedback information to the base station non-periodically.
Abstract translation: 目的：提供一种用于确定适应性下行链路传输模式的多天线无线通信系统，以通过自适应地选择下行链路传输模式来最大化数据传输速率。 构成：基站决定下行链路传输模式。 基站选择反馈信息的类型。 基站向终端提供反馈信息的类型。 终端创建反馈信息。 终端定期向基站提供反馈信息。 基站向终端提供反馈时间信息。 终端非周期性地向基站提供反馈信息。
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公开(公告)号：KR100888505B1
公开(公告)日：2009-03-12
申请号：KR1020070078964
申请日：2007-08-07
CPC classification number: H04L5/0044 , H03M13/1102 , H03M13/23 , H03M13/2707 , H03M13/2778 , H03M13/29 , H03M13/2957 , H03M13/6356 , H03M13/6362 , H03M13/6561 , H04L1/0057 , H04L1/0067 , H04L1/0071
Abstract: 물리 채널이 복수의 시간 영역의 심볼과 복수의 주파수 영역의 부반송파의 조합으로 이루어져 있는 통신 시스템의 송신 장치는 데이터를 복수의 데이터 블록으로 분할한 후에 복수의 데이터 블록을 각각 인터리빙한다. 그리고 나서, 인터리빙된 복수의 데이터 블록을 적어도 하나의 물리 채널에 매핑하여 통신 시스템의 수신 장치로 전송한다. 이와 같이 하면, 데이터 인터리빙에 따른 시간 지연을 감소시킬 수 있다.
부반송파, 심볼, 물리 채널, 트랜스포트 채널, 매핑, 인터리빙-
公开(公告)号：KR1020090010321A
公开(公告)日：2009-01-30
申请号：KR1020070073319
申请日：2007-07-23
CPC classification number: H04L27/261 , H04B1/713 , H04L27/2628 , H04W74/0833
Abstract: An apparatus and a method for generating preamble and an apparatus and a method for detecting a channel response are provided to reduce hardware and a processing time by generating the preamble by using an interpolator and detecting the channel response by using a decimator. A sequence generation part generates a frequency sequence including a plurality of factors in a frequency domain(S110). An IDFT operating part performs an IDFT(Inverse Discrete Fourier Transform) of the frequency sequence generated by the sequence generation part and produces the inverse Fourier transform signal(S120). A protective interval insertion part inserts the protective interval into the inverse Fourier transform signal and produces the protective interval insertion signal(S130). An interpolator performs the interpolation of the protective interval insertion signal and produces an RA preamble(S140). The frequency band of the RA preamble which the interpolator produces is positioned in the base band. A frequency hopping part produces frequency hopped RA preamble by moving the RA preamble of the base band to the frequency band to be transmitted(S150). A transmission part transmits the frequency-hopped RA preamble which the frequency hopping part produces to the channel response detecting device through the channel(S160).
Abstract translation: 提供了一种用于产生前导码的装置和方法，以及用于检测信道响应的装置和方法，以通过使用内插器生成前导码并通过使用抽取器来检测信道响应来减少硬件和处理时间。 序列生成部生成频域中包含多个因子的频率序列（S110）。 IDFT操作部分执行由序列生成部分生成的频率序列的IDFT（离散傅里叶逆变换），并产生傅里叶逆变换信号（S120）。 保护间隔插入部将保护间隔插入到傅里叶逆变换信号中，产生保护间隔插入信号（S130）。 内插器执行保护间隔插入信号的插值并产生RA前导码（S140）。 内插器产生的RA前导码的频带位于基带中。 跳频部分通过将基带的RA前导码移动到要发送的频带来产生跳频的RA前导码（S150）。 发送部通过频道向频道响应检测装置发送跳频部产生的跳频的前导码（S160）。
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