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公开(公告)号：KR1020130125282A
公开(公告)日：2013-11-18
申请号：KR1020120124227
申请日：2012-11-05
Applicant: 한국전자통신연구원
CPC classification number: H04W74/0833 , H04L5/00 , H04L5/0007 , H04L5/0053 , H04W28/04 , H04W72/04 , H04W72/12 , Y02D70/1262 , H04W48/08 , H04W74/002 , H04W76/10
Abstract: The present invention relates to a random access method and a preamble structure for the same in an LTE-based mobile communication system to support a random access from a terminal which has a large cell area with a radius greater than 100 km and is power-limited. In the present invention, while the existing LTE random access preamble sequence is in use as-is, the reciprocation delay time difference among terminals in a large cell area can be compensated. Also, a greater link margin can be secured by transmitting higher power per bandwidth, and the compatibility with the existing LTE resource scheduling can be maintained. Furthermore, random accesses in a large cell are supported, and a preamble structure for a satellite mobile communication can be implemented based on the ground LTE. [Reference numerals] (AA) Start;(BB,D1,F1) Cell radius
Abstract translation: 本发明涉及一种用于基于LTE的移动通信系统中的随机接入方法和前同步码结构，以支持具有大于100km的大小区域的终端的随机接入，并且是功率限制 。 在本发明中，在现有的LTE随机接入前导码序列按原样使用的情况下，可以补偿大小区域中的终端之间的往复延迟时间差。 另外，可以通过每个带宽发送较高功率来确保更大的链路余量，并且可以保持与现有LTE资源调度的兼容性。 此外，支持大小区中的随机接入，并且可以基于地面LTE来实现用于卫星移动通信的前导码结构。 （AA）开始;（BB，D1，F1）小区半径
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公开(公告)号：KR1020120072046A
公开(公告)日：2012-07-03
申请号：KR1020100133810
申请日：2010-12-23
Applicant: 한국전자통신연구원 , 영남대학교 산학협력단
CPC classification number: H04B7/0697 , H04B7/0669 , H04L27/2657 , H04L27/2675
Abstract: PURPOSE: An interference elimination encoding apparatus in a cooperative communication system is provided to correct the phase of data by using values induced from frequency offset information instead of a frequency transition process of a transmitter. CONSTITUTION: Two or more antennas executes frequency upward conversion through an independent carrier generator. A time space encoding unit(110) receives frequency offset information of a signal transmitted from a receiver(200) through two or more antennas through a feedback channel. The time space encoding apparatus creates an offset symbol by correcting two or more signals by using the frequency offset information received from a transmission apparatus(100).
Abstract translation: 目的：提供协作通信系统中的干扰消除编码装置，通过使用从频偏信息引起的值而不是发射机的频率转换处理来校正数据的相位。 构成：两个或多个天线通过独立载波发生器执行频率上转换。 时间空间编码单元（110）通过反馈信道从两个或多个天线接收从接收机（200）发送的信号的频率偏移信息。 时间空间编码装置通过使用从发送装置（100）接收到的频率偏移信息来校正两个以上的信号来生成偏移符号。
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公开(公告)号：KR1020120070138A
公开(公告)日：2012-06-29
申请号：KR1020100131572
申请日：2010-12-21
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18515 , H01Q25/00 , H04L5/0023 , H04L5/0037 , H04W72/0453 , H04W84/06 , H04B7/0667 , H04B7/0691 , H04L27/2688
Abstract: PURPOSE: Transmission apparatus and method for securing frequency selectiveness in a satellite communication system are provided to obtain diversity gain by differentiating channel fading properties in multi-carrier signals. CONSTITUTION: An antenna feed group selecting part(110) selects one or more antenna feed groups. A cyclic delay offset determining part(120) determines cyclic delay offset according to the result of the selection. A transmitting part(130) applies the cyclic delay offset to signals to be transmitted to the selected antenna feed groups and transmits the signals to the selected antenna feed groups. A transmitting part transmits the signals based on orthogonal frequency division multiplexing-based radio interface.
Abstract translation: 目的：提供一种用于确保卫星通信系统中频率选择性的传输装置和方法，以通过区分多载波信号中的信道衰落特性来获得分集增益。 构成：天线馈送组选择部分（110）选择一个或多个天线馈送组。 循环延迟偏移确定部（120）根据选择结果确定循环延迟偏移。 发送部分（130）将循环延迟偏移应用于要发送到所选择的天线馈送组的信号，并将信号发送到所选择的天线馈送组。 发送部发送基于基于正交频分复用的无线接口的信号。
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公开(公告)号：KR101151142B1
公开(公告)日：2012-06-01
申请号：KR1020080130489
申请日：2008-12-19
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18589 , H04B7/18545
Abstract: 이동위성통신시스템에서상향링크를설정하는방법에관한것으로, 제안하는실시예에따른이동위성통신시스템의위성에서상향링크를설정하는방법은, 위성빔 영역내의단말기들로부터상향링크임의접속신호를수신하는단계; 상기단말기들의각각의위치를추정하는단계; 상기추정한단말기들의위치에따라각 단말기에서상향링크신호를송신하는상향링크송신시점을계산하는단계; 각단말기의상향링크송신시점을각 단말기로송신하는단계; 및, 상기각 단말기의상향링크송신시점에서각 단말기로부터상향링크신호를수신하는단계를포함한다.
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公开(公告)号：KR1020100084955A
公开(公告)日：2010-07-28
申请号：KR1020090039231
申请日：2009-05-06
Applicant: 한국전자통신연구원 , 영남대학교 산학협력단
CPC classification number: H04L27/2614 , H04B7/18519
Abstract: PURPOSE: By presuming the large-scale fading value of user and controlling the power control mode the control method for minimizing the PAR can minimize PAR. CONSTITUTION: A large-scale fading values of all users are presumed. The number of users in which the large-scale fading value bigger than the standards fading value is counted. The number of subcarrier which users counted use is counted. It is controlled to the power control mode. The large-scale amplitude value of user is presumed. The TX power is adjusted if the large-scale amplitude value is not similar of the reference amplitude value(320). The transmission signal becomes to the TX power adjusted(330).
Abstract translation: 目的：通过假设用户的大规模衰落值并控制功率控制模式，使PAR最小化的控制方法可以最小化PAR。 构成：推测所有用户的大规模衰落值。 大规模衰落值大于标准衰落值的用户数被计数。 对用户计数使用的子载波数进行计数。 它被控制到电源控制模式。 推测用户的大幅度振幅值。 如果大幅度振幅值与参考振幅值（320）不相似，则TX功率被调整。 发送信号变为TX功率调整（330）。
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Patent Agency Ranking
公开(公告)号：KR1020100063332A
公开(公告)日：2010-06-11
申请号：KR1020080121805
申请日：2008-12-03
Applicant: 한국전자통신연구원
IPC: H04L1/18
CPC classification number: H04L1/187 , H04L1/1874
Abstract: PURPOSE: A method for interaction between ARQ and HARQ of a system with a long shuttling delay time is provided to quickly cope with a transmission error by re-transmitting a packet of a window on standby when an error in which NACk of HARQ is mistaken for ACK occurs. CONSTITUTION: A transmission buffer(210) and a transmit window are influenced by the HARQ feedback information. A buffer on standby(220) and an window on standby are influenced by a status report information packet(230). The buffer on standby detects an error in which NACK is recognized as ACK in HARQ. The buffer on standby re-transmits the packet of the buffer on standby by receiving feedback information concerning the error.
Abstract translation: 目的：提供一种具有长穿梭延迟时间的系统的ARQ和HARQ之间的交互方法，以便当HARQ的NACk被误认为是错误时，通过重新发送待机窗口的分组来快速应对传输错误 发生ACK。 构成：发送缓冲器（210）和发送窗口受到HARQ反馈信息的影响。 处于待机状态的缓冲器（220）和备用窗口受到状态报告信息包（230）的影响。 待机缓冲器检测到在HARQ中将NACK识别为ACK的错误。 待机缓冲区通过接收有关错误的反馈信息重新发送缓冲区的数据包在待机状态。
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公开(公告)号：KR1020100058907A
公开(公告)日：2010-06-04
申请号：KR1020080117492
申请日：2008-11-25
Applicant: 한국전자통신연구원
CPC classification number: H04B7/2041 , H04L5/0023 , H04L5/0037 , H04L5/0069 , H04W72/0453 , H04W72/082 , H04J11/00
Abstract: PURPOSE: A mobile satellite communications apparatus and a method thereof are provided, which maximizes frequency use efficiency. CONSTITUTION: If data are received from a mobile terminal, a satellite signal sensing part(421) senses a satellite signal. A subcarrier deciding unit(423) recognizes a subcarrier group used for communications between a mobile terminal and a satellite using a satellite signal. A communications unit(425) communicates with the mobile terminal using subcarrier groups except for the subcarrier group. If the ground auxiliary device locates in the central area of a beam, the subcarrier deciding unit recognizes the first subcarrier group used in communications between the satellite locating in the border of the beam and the mobile terminal.
Abstract translation: 目的：提供一种使频率使用效率最大化的移动卫星通信装置及其方法。 构成：如果从移动终端接收到数据，则卫星信号检测部（421）感测到卫星信号。 子载波决定单元（423）使用卫星信号识别用于移动终端和卫星之间的通信的子载波组。 通信单元（425）使用除子载波组之外的子载波组与移动终端进行通信。 如果地面辅助设备位于波束的中心区域，则副载波判定单元识别在位于波束边界的卫星与移动终端之间的通信中使用的第一子载波组。
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公开(公告)号：KR100909469B1
公开(公告)日：2009-07-28
申请号：KR1020070132623
申请日：2007-12-17
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0003 , H04L1/0015 , H04L1/0606 , H04L1/0668 , H04L5/0007 , H04L25/03821 , H04L27/2626
Abstract: 송신기는 수신기로부터 피드백 정보를 수신하고, 피드백 정보를 바탕으로 무선 채널의 채널 환경을 예측한다. 이후 채널 환경에 대응하는 변조 방식에 따라 주파수 다중화 신호를 생성하고, 생성된 주파수 다중화 신호를 전송한다. 이를 통해 인접 반송파 간섭을 제거할 수 있다.
반송파, 간섭, OFDM, 주파수 옵셋, 시공간 코드Abstract translation: 发射机从接收机接收反馈信息，并基于反馈信息估计无线电信道的信道环境。 然后，发送器根据信道环境通过调制方法生成频率复用信号，并发送生成的频率复用信号。 以这种方式，可以消除载波间干扰。
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公开(公告)号：KR1020080051454A
公开(公告)日：2008-06-11
申请号：KR1020060122548
申请日：2006-12-05
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2662 , H04L27/2675
Abstract: A method and an apparatus for detecting a timing synchronization are provided to obtain a timing synchronization accurately without changing a predefined training symbol. A time synchronization detecting apparatus includes a first sequence generator(10) and a synchronization unit(11). The first sequence generator generates plural first data sequences from a received signal. The synchronization portion correlates the first data sequence with a second data sequence and determines an FFT(Fast Fourier Transform) timing of the received signal by using the correlation result. The first sequence generator includes a mapper, a complex conjugate portion, and a multiplier. The mapper extracts a portion of the received signal and maps the received signal to plural third data sequences. The multiplier multiplies a complex conjugate of the data sequence with other data sequences to output the first data sequence.
Abstract translation: 提供了一种用于检测定时同步的方法和装置，以便在不改变预定训练符号的情况下准确地获得定时同步。 时间同步检测装置包括第一序列发生器（10）和同步单元（11）。 第一序列发生器从接收信号产生多个第一数据序列。 同步部分将第一数据序列与第二数据序列相关，并通过使用相关结果确定接收信号的FFT（快速傅里叶变换）定时。 第一序列生成器包括映射器，复共轭部分和乘法器。 映射器提取接收信号的一部分，并将接收到的信号映射到多个第三数据序列。 乘法器将数据序列的复共轭与其他数据序列相乘以输出第一数据序列。
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公开(公告)号：KR100829860B1
公开(公告)日：2008-05-19
申请号：KR1020060094398
申请日：2006-09-27
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04B7/18541 , H04B7/18543 , Y02D70/122 , Y02D70/164 , Y02D70/446
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 ATC(Ancillary Terrestrial Components)를 포함하는 위성/이동통신 시스템에서 핸드오버를 고려한 전력제어 방법에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은 ATC를 포함하는 다중사용자 위성/이동통신 시스템에서 위치정보를 이용한 효율적인 전력제어 및 핸드오버 기법을 적용하여, 원하는 서비스품질(QoS)을 만족하면서 각 사용자의 수신신호대간섭비를 일정하게 유지할 수 있도록 하기 위한, 핸드오버를 고려한 전력제어 방법을 제공하는데 그 목적이 있음.
3. 발명의 해결방법의 요지
본 발명은, ATC(Ancillary Terrestrial Components)를 포함하는 위성/이동통신 시스템에서의 전력제어 방법에 있어서, 단말기의 현재 위치정보를 획득하는 단계; 상기 단말기의 현재 전송전력 정보를 획득하는 단계; 및 상기 위치정보를 바탕으로 상기 단말기의 위치를 인지하고, 셀 혹은 빔 가장자리에서 상기 단말기의 속도정보를 측정하여, 상기 속도정보에 의한 이동에 따라 수신 다이버시트를 이용해 상기 현재 전송전력 정보와 '상기 단말기가 존재하는 영역에 중첩되는 시스템들의 전송 전력 동작범위'를 바탕으로 핸드오버를 고려한 전력제어를 수행하는 제1 전력제어 단계를 포함한다.
4. 발명의 중요한 용도
본 발명은 ATC를 포함하는 위성 또는 이동통신 시스템 등에 이용됨.
ATC, 핸드오버, 전력제어, 폐루프 전력제어, 개방루프 전력제어, 왕복지연 보상Abstract translation: 提供了考虑在具有辅助地面分量（ATC）的通信系统中的切换的功率控制方法。 功率控制方法包括：a）获取终端的当前位置信息; b）获取终端的当前发送功率信息; 以及c）基于所述位置信息来确认所述终端的位置，测量所述终端在ATC小区或点波束的边界上的速度信息，以及基于当前发射功率信息执行考虑到切换的第一功率控制，以及 通过使用接收分集的速度信息。
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