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91.发明公开직교주파수분할다중접속 시스템에서의 파일롯 서브캐리어할당 방법과 송신 방법 및 그 장치, 수신 방법 및 그 장치 有权导频载波分配方法和接收方法，接收装置和发送方法，OFDM系统中的发送装置
公开(公告)号：KR1020050051865A
公开(公告)日：2005-06-02
申请号：KR1020030085530
申请日：2003-11-28
Applicant: 한국전자통신연구원 , 삼성전자주식회사 , 주식회사 케이티 , 에스케이브로드밴드주식회사 , 주식회사 케이티프리텔 , 에스케이텔레콤 주식회사
IPC: H04L27/26
CPC classification number: H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/0232
Abstract: 본 발명은 직교주파수분할다중접속 시스템에서의 파일롯 서브캐리어 할당 방법과 송신 방법 및 그 장치, 수신 방법 및 그 장치에 관한 것이다.
본 발명의 직교주파수분할다중접속 시스템에서의 파일롯 서브캐리어 할당 방법은 하향링크 채널의 전체 대역을 특정 개수의 서브캐리어를 갖는 다수의 서브캐리어 그룹으로 분할하고, 상기 다수의 서브캐리어 그룹의 각 서브캐리어마다 고유의 파일롯 패턴에 따른 파일롯을 할당한다. 그리고, 다수의 서브캐리어 그룹 중 특정 그룹 내의 셀 간 파일롯의 위치를 특정 주기로 사이클링한다. 이렇게 하여 결정된 파일롯을 특정 기준에 의해 서로 교환할 수 있다.
본 발명에 의하면, 파일롯끼리의 충돌을 줄여서 채널 추정의 정확도를 향상시킬 수 있고, 구분할 수 있는 파일롯 수를 증가시켜서 셀 계획을 쉽게 수행할 수 있으며, 특별한 셀 계획없이 시스템의 디플로이(depoly)가 가능하다.-
公开(公告)号：KR1020030033834A
公开(公告)日：2003-05-01
申请号：KR1020010065989
申请日：2001-10-25
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04B1/7077 , H04B1/7083 , H04B2201/70702
Abstract: PURPOSE: A system and a method for searching a cell of a mobile station in a TDD(Time Division Duplex) system are provided to checks over the existence of synchronization through a confirmation mode after searching an SSC(Secondary Synchronization Code) without setting a threshold, when the mobile station searches a base station, so as to reduce a time for searching the base station. CONSTITUTION: A PSC(Primary Synchronization Code) search module(100) searches a PSC during a determined search frame by using receiving signals for transmission signals of a base station and a generated PSC, and compares each frame value from the PSC to select a position of the maximum value. A correlation module(300) estimates a phase necessary for demodulating an SSC from the searched PSC, and correlates the receiving signals and a code for configuring the SSC by using the estimated phase value and the maximum value position to acquire the first correlation values. An SSC search module(400) generates decision variables by using the first correlation values, and accumulates M slots based on the maximum value position, to align each decision value of each M slot in order of size to a determined buffer size and store the aligned values. A comparison and discrimination module(500) detects the maximum variable value in the decision variables of the SSC search module(400), and compares the maximum variable value with the values stored in the SSC search module(400) to count identical values, then compares the counted values with a predetermined system decision value in size to discriminate whether slot synchronization and group acquisition are successful. And a base station deciding module(700) correlates midamble codes in a group generated according to discrimination results of the comparison and discrimination module(500) and the receiving signal to calculate the second correlation values, and selects the maximum value in the second correlation values to decide a base station.
Abstract translation: 目的：提供一种用于在TDD（时分双工）系统中搜索移动站的小区的系统和方法，用于在搜索SSC（辅助同步码）之后通过确认模式检查是否存在同步，而不设置阈值 当移动站搜索基站时，以减少搜索基站的时间。 构成：PSC（主同步码）搜索模块（100）通过使用用于基站和所生成的PSC的发送信号的接收信号在所确定的搜索帧期间搜索PSC，并且比较来自PSC的每个帧值以选择位置 的最大值。 相关模块（300）估计从所搜索的PSC解调SSC所需的相位，并且通过使用所估计的相位值和最大值位置来对接收信号和用于配置SSC的代码相关以获取第一相关值。 SSC搜索模块（400）通过使用第一相关值产生决策变量，并且基于最大值位置累积M个时隙，以将每个M时隙的每个判定值按大小顺序与确定的缓冲器大小对齐并存储 值。 比较辨别模块（500）检测SSC搜索模块（400）的判定变量中的最大可变值，并将最大可变值与存储在SSC搜索模块（400）中的值进行比较以计数相同的值，然后 将计数值与规定的系统判定值进行比较，以区分时隙同步和组获取是否成功。 并且，基站决定模块（700）将根据比较判别模块（500）的识别结果生成的组中的中间码对应于接收信号，计算出第二相关值，并选择第二相关值中的最大值 决定一个基站。
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公开(公告)号：KR1020030021434A
公开(公告)日：2003-03-15
申请号：KR1020010054710
申请日：2001-09-06
Applicant: 한국전자통신연구원
IPC: H04B7/216
CPC classification number: H04W72/082 , H04B7/216 , H04W16/04 , H04W72/0446
Abstract: PURPOSE: An adaptive code bank managing method for allocating code channels in a mobile communication system and an apparatus therefor are provided to calculate the maximum number of allocable code channels according to wireless channel environments, and to adaptively vary the code bank by the size of communication traffic, so as to improve efficiency in communication channel use. CONSTITUTION: If a request for using code channels is generated, a channel number adjustor of a code bank management unit calculates the number of necessary code channels(S100,S110). The channel number adjustor calculates a link gain between a mobile station and a base station, on the basis of power amount allocated to all currently used code channels, total noise and interference amount, and SIR(Signal-to-Interference Rate)(S120,S130). The channel number adjustor calculates the number of additionally allocable code channels(S140). The channel number adjustor calculates the size of a code bank(S150). A channel allocator compares the number of necessary codes with the number of available channel codes(S160). If the number of necessary codes is larger, the channel allocator declares the failure of code channel allocation(S170). And if the number of necessary codes is smaller, the channel allocator allocates code channels(S180).
Abstract translation: 目的：提供一种用于在移动通信系统中分配代码信道的自适应代码库管理方法及其装置，用于根据无线信道环境计算可分配代码信道的最大数量，并根据通信的大小自适应地改变代码库 流量，从而提高通信渠道使用效率。 构成：如果生成了使用代码通道的请求，则代码库管理单元的通道号调整器计算必要代码通道的数量（S100，S110）。 信道号调整器基于分配给所有当前使用的码信道的功率量，总噪声和干扰量以及SIR（信号对干扰率）来计算移动台和基站之间的链路增益（S120， S130）。 信道编号调整器计算附加可分配的码信道的数量（S140）。 通道编号调节器计算代码库的大小（S150）。 信道分配器将必要代码的数量与可用信道码的数量进行比较（S160）。 如果需要的代码数量较多，则通道分配器声明代码通道分配失败（S170）。 并且，如果必要代码的数量较少，则信道分配器分配代码信道（S180）。
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公开(公告)号：KR1020030017193A
公开(公告)日：2003-03-03
申请号：KR1020010051365
申请日：2001-08-24
Applicant: 한국전자통신연구원
IPC: H04B1/7107
CPC classification number: H04B1/71075 , H04B1/7093
Abstract: PURPOSE: A multiuser interference cancellation receiver for a TDD-CDMA(Time Division Duplex-Code Division Multiple Access) system and a method for controlling the interference cancellation are provided to perform interference cancellation for signals having high power values even when differences of signal power values are wide among users, so as to minimize errors in the detection of user signals having low signal power values. CONSTITUTION: A data extractor(100) extracts data from received signals and outputs the extracted data. A signal delay part(200) delays the signals outputted from the data extractor(100) during a predetermined time, and outputs the delayed signals. An interference cancellation selection part(300) extracts midamble signal channels from received original signals, to select and output users of the subject of the first interference cancellation. The first step interference cancellation block(400) receives data of the received signals from the data extractor(100), to perform the first parallel interference cancellation for the selected users of the first interference cancellation subject and output reproduction signals. And the second step interference cancellation block(500) receives data of the received signals delayed during the predetermined time and outputted from the signal delay part(200), to perform the second parallel interference cancellation using the first reproduction signals outputted from the first step interference cancellation block(400).
Abstract translation: 目的：提供用于TDD-CDMA（时分双工码分多址）系统的多用户干扰消除接收机和用于控制干扰消除的方法，以便即使在信号功率值差 在用户中广泛，以便最小化检测具有低信号功率值的用户信号的错误。 构成：数据提取器（100）从接收信号中提取数据并输出提取的数据。 信号延迟部分（200）在预定时间内延迟从数据提取器（100）输出的信号，并输出延迟的信号。 干扰消除选择部分（300）从接收到的原始信号中提取中置信号信道，以选择和输出第一干扰消除对象的用户。 第一级干扰消除块（400）从数据提取器（100）接收接收到的信号的数据，以对第一干扰消除对象的选定用户和输出再现信号执行第一并行干扰消除。 并且第二级干扰消除块（500）接收在预定时间内延迟并从信号延迟部分（200）输出的接收信号的数据，以使用从第一级干扰输出的第一再现信号执行第二并联干扰消除 消除块（400）。
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公开(公告)号：KR1020170120542A
公开(公告)日：2017-10-31
申请号：KR1020170135825
申请日：2017-10-19
Applicant: 한국전자통신연구원
IPC: H04L5/00 , H04L1/00 , H04B7/0452 , H04W28/06 , H04L25/02 , H04B7/06 , H04B7/0456 , H04L25/03
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: 본발명은다중사용자무선통신시스템에서전송효율향상을위한제어및 훈련심볼전송방법및 장치에대한것이다. 본발명의일 실시예에따른방법은, 다중사용자무선통신시스템에서제어및 훈련심볼전송방법으로, 동시에서로다른데이터를각 단말들로전송할시 각데이터들의요구전송률이각 단말들에서채널추정을통해만족할수 있는지를판단하는과정과, 상기판단결과각 데이터의요구전송률이만족되지않는경우상기제어및 훈련심볼을시간, 주파수, 코드영역의조합을이용하여단말별로구분할수 있도록데이터프레임을구성하여각 단말별로전송하는과정을포함한다.
Abstract translation: 本发明涉及用于在多用户无线通信系统中传送用于提高传输效率的控制和训练符号的方法和设备。 在根据本发明的一个实施例的方法中，多用户无线通信系统的控制和训练符号传输方法，在同一时间不同的数据通过信道估计中的终端时发送到每个移动站中的每个数据的所需要的传输速率 并且如果确定该过程是否被满足，并确定了每个数据的所需要的传输速率不满足使用的时间的组合的控制和训练符号，频率，构成数据帧的代码区域中由每个终端细分 对于每个终端。
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Patent Agency Ranking
公开(公告)号：KR101762377B1
公开(公告)日：2017-07-27
申请号：KR1020110032041
申请日：2011-04-07
Applicant: 한국전자통신연구원
CPC classification number: H04W52/0203 , H04W52/0229 , Y02D70/142
Abstract: 본발명은무선통신시스템에서전력소모를감소시키기위한방법에관한것으로, 무선통신시스템에서전력소모를감소시키기위한방법으로, 엑세스포인트(또는기지국)와사용자단말이서로알고있는상기사용자단말의식별정보의적어도일부비트들을이용해디스크램블초기값을생성하고, 상기생성된디스크램블초기값을이용해제1 디스크램블시퀀스를생성하며, 상기생성된제1 디스크램블시퀀스의적어도일부비트들과현재수신되는신호의서비스필드의적어도일부비트들을비교하여현재수신되는신호의계속수신여부를판단한다. 또한본 발명은사용자단말의식별정보대신에엑세스포인트의식별정보를이용할수 있다.
Abstract translation: 本发明涉及一种用于减少无线通信系统中的转弯的功耗，减少转弯功耗的无线通信系统中，接入点（或基站）和用户终端的识别信息的用户终端的方法是已知的彼此至少 至少一些比特和当前的接收信号的使用一些由解扰的初始值产生的比特，并将所产生的解扰器，以产生用于关闭一个解扰序列的初始值，所产生的第一二服务是对加扰序列 现场确定是否继续接收当前接收到的信号。 而且，本发明可以使用接入点的标识信息来代替用户终端的标识信息。
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公开(公告)号：KR1020170054261A
公开(公告)日：2017-05-17
申请号：KR1020160140407
申请日：2016-10-26
Applicant: 한국전자통신연구원
Abstract: 단말은소스기지국과타겟기지국간수행되는핸드오버준비단계에서, 상기단말이현재접속한소스기지국으로부터사전랜덤접속명령을 L2(Layer2) 시그널링을통해수신하면, 상기핸드오버준비단계에서, 상기사전랜덤접속명령에따라서타겟기지국과랜덤접속절차를수행한다.
Abstract translation: 该终端是源基站在切换准备阶段的目标是基站之间进行，当从连接源基站预先随机接入指示经由L2（第二层）信令，所述切换准备阶段中，随机预接入接收的终端yihyeonjae 并根据该命令与目标基站进行随机接入过程。
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公开(公告)号：KR1020170010891A
公开(公告)日：2017-02-01
申请号：KR1020170010637
申请日：2017-01-23
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0452 , H04L1/0003 , H04L1/0009 , H04L1/0015 , H04L1/08 , H04L25/0204
Abstract: 본발명은다중사용자무선전송시스템에서데이터전송장치및 방법에관한것으로, 특히다중사용자무선전송시스템에서데이터전송의효율향상을위한방법및 장치에대한것이다. 본발명의일 실시예에따른방법은, 다중사용자무선통신시스템에서데이터의전송방법으로, 단말로부터궤환(feedback) 정보또는사운딩(sounding)을통하여단말별로채널상태를추정하여각 단말로개별적인데이터를동시에전송할단말을선정하는과정과, 상기선정된단말들의수신신호대잡음비를결정하고, 선부호화매트릭스(precoding matrix)를계산하는과정과, 각단말별로부호화및 변조기법(MCS) 및상기각 단말별 MCS에따른데이터필드(Data field)의심볼수를계산하는과정과, 선정된단말이둘 이상인경우상기데이터필드를동시전송할단말의수에따라영역을구분하는과정과, 각단말의각 영역별로수신신호대잡음비(SINR)를재계산하고, 이에따른 MCS를재설정하여패킷을구성하고이를전송하는과정을포함한다.
Abstract translation: 本发明特别涉及一种用于提高多用户无线传输系统中的数据传输效率的方法和装置。 根据本发明的一个实施例，作为多用户无线通信系统中的数据的传输方法的方法包括以下步骤：通过从终端接收的探测或反馈信息来估计每个终端的信道状态，以及 选择要同时发送单个数据的终端; 确定所选终端的信噪比，并计算预编码矩阵; 根据每个终端的MCS计算每个终端的调制和编码方案（MCS）和数据字段的符号数; 如果存在两个或更多个所选择的终端，则根据要同时发送数据字段的终端数量划分一个区域; 并重新计算每个终端的每个区域的接收信号与干扰和噪声比（SINR），通过根据重新计算的SINR重新设置MCS来配置分组，并发送配置的分组。
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公开(公告)号：KR1020160018351A
公开(公告)日：2016-02-17
申请号：KR1020150099635
申请日：2015-07-14
Applicant: 한국전자통신연구원
Abstract: 무선랜에서스테이션의동작방법이개시된다. 본발명에따른무선랜에서스테이션의동작방법은, 레거시프리앰블(legacy preamble)을생성하는단계; 복수의수신스테이션들의스케줄링(scheduling) 정보를포함하는 HE(high efficiency) 프리앰블을생성하는단계; 및상기레거시프리앰블, 상기 HE 프리앰블및 페이로드(payload)를포함하는 PPDU(PLCP(physical layer convergence procedure) protocol data unit)를생성하는단계를포함할수 있다.
Abstract translation: 公开了一种在无线局域网中的站的操作方法。 根据本发明，无线局域网中的操作方法可以包括以下步骤：产生传统前同步码; 生成包括多个接收站的调度信息的高效率（HE）前导码; 以及生成包括遗留前导码，HE前导码和有效载荷的物理层收敛过程（PLCP）协议数据单元（PPDU）。
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公开(公告)号：KR1020140112590A
公开(公告)日：2014-09-24
申请号：KR1020130025480
申请日：2013-03-11
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0626 , H04B7/0617 , H04W52/42 , Y02D70/00
Abstract: Disclosed are a method and a device for efficiently allocating transmission power in a wireless communications system. The transmission power allocation method used in the wireless communications system includes: a step in which an access point (AP) receives signals transmitted from multiple stations and channel information of the stations; a step of determining the signals to be transmitted simultaneously among the received signals; a step of calculating a channel weight vector and transmission power based on the received channel information; a step of spatially mapping the calculated channel weight vector and the determined signals; and a step of controlling the transmission power of the spatially mapped signals based on the determined transmission power.
Abstract translation: 公开了一种在无线通信系统中有效地分配发射功率的方法和装置。 在无线通信系统中使用的发送功率分配方法包括：接入点（AP）接收从多个站发送的信号和站的信道信息的步骤; 确定在接收信号之间同时发送的信号的步骤; 基于所接收的信道信息计算信道权重向量和发送功率的步骤; 空间映射所计算的信道权重向量和所确定的信号的步骤; 以及基于所确定的发送功率来控制空间映射信号的发送功率的步骤。
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