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公开(公告)号：KR1020100063333A
公开(公告)日：2010-06-11
申请号：KR1020080121806
申请日：2008-12-03
Applicant: 한국전자통신연구원
CPC classification number: H04B7/2656 , H04W74/002 , H04L1/0007 , H04W74/0833
Abstract: PURPOSE: A hierarchical random access method for a wireless communication system having very large cell area are provided to design slot length to integral times of basic slot length according to timing error compensation capability, thereby enabling terminals to user various slot lengths. CONSTITUTION: Terminals not having a timing compensation capability uses the first slot(110). According to timing compensation capability, terminals without timing compensation capability uses two more slots(120,130). According to capability of terminals, many RACH slots are assigned to terminals. Therefore, the terminals has much more random access chances at the same time. In hierarchical RACH structure, whole preamble sequence(111) assigned to RACH is assigned according to a layer.
Abstract translation: 目的：提供一种具有非常大的单元区域的无线通信系统的分层随机接入方法，以根据定时误差补偿能力将时隙长度设计为基本时隙长度的整数倍，从而使终端能够使用各种时隙长度。 构成：没有定时补偿功能的端子使用第一个插槽（110）。 根据定时补偿能力，无定时补偿能力的终端使用两个以上的时隙（120,130）。 根据终端的能力，将许多RACH时隙分配给终端。 因此，终端具有更多的随机访问机会。 在分级RACH结构中，分配给RACH的整个前同步码序列（111）根据层被分配。
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公开(公告)号：KR1020090065164A
公开(公告)日：2009-06-22
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 , H04L25/085 , H04L27/2688
Abstract: A method for removing an inter-carrier interference in a mobile communication system is provided to remove an inter-carrier interference by reducing a frequency offset according to a channel state. A transmitting part generates a control signal(S101). The transmitting part transmits a control signal through a wireless channel(S103). A receiving part checks a generating state of a frequency offset of the received control signal(S105). The receiving part estimates a channel state and a SNR(Signal to Noise Ratio)(S107). The receiving part generates feedback information including a channel quality indicator corresponding to the estimated channel state and the SNR(S109). The receiving part transmits the feedback information to the transmitting part through a wireless channel(S111). The transmitting part predicts a channel state about the wireless channel(S113). The transmitting part generates an OFDM(Orthogonal Frequency Division Multiplexing) signal(S115). The transmitting part transmits the OFDM signal to the receiving part(S117). The transmitting part determines an excessive state of a coherence time(S119). The transmitting part checks an additional transmission(S121).
Abstract translation: 提供一种去除移动通信系统中的载波间干扰的方法，以通过根据信道状态减少频率偏移来消除载波间干扰。 发送部生成控制信号（S101）。 发送部通过无线信道发送控制信号（S103）。 接收部检查接收到的控制信号的频率偏移的生成状态（S105）。 接收部估计信道状态和SNR（信噪比）（S107）。 所述接收部生成反馈信息，所述反馈信息包括与所估计的信道状态和所述SNR对应的信道质量指标（S109）。 接收部通过无线信道将反馈信息发送给发送部（S111）。 发送部分预测关于无线信道的信道状态（S113）。 发送部生成OFDM（正交频分复用）信号（S115）。 发送部将OFDM信号发送到接收部（S117）。 发送部确定相干时间的过度状态（S119）。 发送部检查附加发送（S121）。
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公开(公告)号：KR1020090061422A
公开(公告)日：2009-06-16
申请号：KR1020070128429
申请日：2007-12-11
Applicant: 한국전자통신연구원
CPC classification number: H04B7/18539 , H04B7/2606 , H04W72/085 , H04W84/047 , H04W88/04 , H04W24/10 , H04W28/04
Abstract: An electric wave resource re-using system and a method thereof are provided to secure the electric wave resource required for transmitting repeater data to a user terminal. A signal receiver(410) restores a signal received from an LM1 link or Lp link. A repeater data manager(430) manages data received from a satellite or base station and repeater data. A signal transmitter(440) transmits a signal of the repeater data manager to a user terminal of the second communication area through the electronic wave resource determined by an electronic wave resource reusing unit(420). The electronic wave resource reusing unit determines a portion of the whole electric wave resource of a system which can be re-used in a repeater.
Abstract translation: 提供了一种电波资源再利用系统及其方法，用于将用于将中继器数据发送到用户终端所需的电波资源。 信号接收器（410）恢复从LM1链路或Lp链路接收的信号。 中继器数据管理器（430）管理从卫星或基站接收的数据和中继器数据。 信号发送器（440）通过由电子波资源重用单元（420）确定的电子波资源将中继器数据管理器的信号发送到第二通信区域的用户终端。 电子波资源重用单元确定可在中继器中重新使用的系统的整个电波资源的一部分。
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公开(公告)号：KR100842272B1
公开(公告)日：2008-06-30
申请号：KR1020060122548
申请日：2006-12-05
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2662 , H04L27/2675
Abstract: 고속 푸리에 변환을 위한 시간 동기 검출 장치 및 이를 위한 방법이 개시된다. 본 발명의 고속 푸리에 변환을 위한 시간 동기 검출 장치는 수신신호로부터 복수 개의 제1데이터 시퀀스들을 생성하는 제1시퀀스 생성부; 및 제1데이터 시퀀스들과 입력되는 제2데이터 시퀀스들을 상관하고, 상관 결과를 이용하여 수신신호를 고속 푸리에 변환하는 시점을 결정하는 동기화부를 포함함을 특징으로 한다.
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公开(公告)号：KR1020080028717A
公开(公告)日：2008-04-01
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 , H04W52/282 , Y02D70/00
Abstract: A power control method for considering handover in a satellite/mobile communication system including ATCs(Ancillary Terrestrial Components) is provided to apply efficient power control and handover techniques using location information, thereby regularly maintaining receiving signal to noise ratios of each user as satisfying desired QoS(Quality of Service). The current location information of a terminal is obtained(401). The current transmission power information of the terminal is obtained(402). A location of the terminal is recognized on the basis of the location information, and speed information of the terminal is measured at the edge of a cell or a beam to carry out power control in consideration of handover according to the speed information and the current transmission power information by using a receiving diversity(403-406).
Abstract translation: 提供了一种用于考虑包括ATC（辅助地面部件）在内的卫星/移动通信系统中的切换的功率控制方法，以使用位置信息来应用有效的功率控制和切换技术，由此定期地将每个用户的接收信噪比满足为满足期望的QoS （服务质量）。 获得终端的当前位置信息（401）。 获得终端的当前发送功率信息（402）。 基于位置信息识别终端的位置，并且根据速度信息和当前传输考虑到切换，在小区或波束的边缘处测量终端的速度信息，以进行功率控制 功率信息通过使用接收分集（403-406）。
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Patent Agency Ranking
公开(公告)号：KR100758308B1
公开(公告)日：2007-09-12
申请号：KR1020060091985
申请日：2006-09-21
Applicant: 한국전자통신연구원
IPC: H04L12/855 , H04L1/18 , H04W72/12
CPC classification number: H04L1/1887 , H04L1/1819 , H04L1/1835
Abstract: A method for scheduling a packet in a selective hybrid automatic retransmitting request system is provided to reflect receiver buffer excessive error generating probability on a scheduling function by estimating the receiver buffer excessive error generating probability in real-time. A method for scheduling a packet in a selective hybrid automatic retransmitting request system includes the steps of: increasing the priority of a receiver buffer after transmitting the packet to a receiver(401,402); verifying an ACK(ACKnowledgment) packet or an NACK(Negative ACK) packet according to receiving a feedback packet of the transmitted packet(404); reducing the priority order of the receiver buffer when the feedback packet is the ACK packet(405); increasing the priority order of the receiver buffer according to an initially transmitted NACK packet by verifying the initially transmitted NACK packet or a retransmitted NACK packet when the feedback packet is the NACK packet(409); reducing the priority order of the receiver buffer according to the retransmitted NACK packet(411); and scheduling the packet after calculating the priority order of the receiver buffer by performing all steps through the whole receiver.
Abstract translation: 提供了一种用于在选择性混合自动重传请求系统中调度分组的方法，以通过实时估计接收机缓冲器过大误差产生概率来反映调度功能上的接收缓冲区过大误差产生概率。 一种用于在选择性混合自动重传请求系统中调度分组的方法包括以下步骤：在将分组发送到接收机之后增加接收机缓冲器的优先级（401,402）; 根据接收到所发送的分组的反馈分组来验证ACK（确认）分组或NACK（Negative ACK）分组（404）; 当反馈分组是ACK分组时，降低接收机缓冲器的优先顺序（405）; 当反馈分组是NACK分组时，通过验证最初发送的NACK分组或重传的NACK分组来增加根据最初发送的NACK分组的接收机缓冲器的优先级顺序（409）; 根据重传的NACK分组降低接收缓冲器的优先顺序（411）; 并且通过执行通过整个接收机的所有步骤来计算接收缓冲器的优先级顺序来调度分组。
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公开(公告)号：KR1020070060928A
公开(公告)日：2007-06-13
申请号：KR1020050121133
申请日：2005-12-09
Applicant: 한국전자통신연구원
CPC classification number: H04L27/2657 , H04B7/0842 , H04B7/0857 , H04B7/086 , H04L27/2662 , H04L27/2676
Abstract: A time and frequency offset estimating method and an apparatus using diversity in an OFDM(Orthogonal Frequency Division Multiplexing) communication system are provided to enhance performance in a low SNR(Signal to Noise Ratio) and multi-path environment by using weight. A time and frequency offset estimating apparatus using diversity in an OFDM communication system includes a delay device(101), a first adding device(104), a first summing device(105), a second adding device(107), a second summing device(108), a time offset detecting device(110), and a frequency offset outputting device(111). The delay device(101) delays a received signal by a random index. The first adding device(104) adds a square of the delayed signal and a square of the original received signal. The first summing device(105) adds the adding result of the first adding device(104) as much as the given random number, and calculates a first sum by multiplying the adding result by a value calculated by using weight set for the received signal, signal power, and noise power. The second adding device(107) adds the original received signal and a value obtained by changing a code of an imaginary number part of a complex number of the delayed received signal by the delay device(101). The second summing device(108) adds the adding result of the second adding device(107) as much as the given random number, and outputs a second sum. The time offset detecting device(110) subtracts an absolute value of the second summing device(108) and the result value of the first summing device(105), and detects a maximum value. The frequency offset outputting device(111) outputs an angle for the absolute value of the second summing device(108), and outputs a frequency offset by using a time offset detected by the time offset detecting device(110).
Abstract translation: 提供了OFDM（正交频分复用）通信系统中的时间和频率偏移估计方法和使用分集的装置，以通过使用权重来增强低SNR（信噪比）和多路径环境中的性能。 在OFDM通信系统中使用分集的时间和频率偏移估计装置包括延迟装置（101），第一加法装置（104），第一加法装置（105），第二加法装置（107），第二加法装置 （108），时间偏移检测装置（110）和频率偏移输出装置（111）。 延迟装置（101）通过随机索引来延迟接收到的信号。 第一加法装置（104）将延迟信号的平方和原始接收信号的平方相加。 第一求和装置（105）将第一加法装置（104）的相加结果与给定的随机数相加，并且通过将加法结果乘以通过使用为接收信号设置的权重而计算的值来计算第一和， 信号功率和噪声功率。 第二加法装置（107）将原始接收信号和通过延迟装置（101）改变延迟接收信号的复数的虚数部分的代码而获得的值相加。 第二求和装置（108）将第二加法装置（107）的相加结果与给定的随机数相加，并输出第二和。 时间偏移检测装置（110）减去第二求和装置（108）的绝对值和第一求和装置（105）的结果值，并检测最大值。 频率偏移输出装置（111）输出第二求和装置（108）的绝对值的角度，并通过使用由时间偏移检测装置（110）检测出的时间偏移来输出频率偏移。
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公开(公告)号：KR100703712B1
公开(公告)日：2007-04-05
申请号：KR1020040052381
申请日：2004-07-06
Applicant: 한국전자통신연구원
IPC: H04W72/12 , H04L12/851 , H04L12/863 , H04L12/18
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
가중치를 이용한 전송 우선 순위 결정 방법에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
위성이나 기지국과 같은 중앙국으로부터 여러 사용자 단말로 방송 및 멀티캐스트 서비스를 제공하는데 있어서 서비스의 형태와 종류를 고려한 가중치를 이용하여 패킷 스케쥴링함으로써 서비스의 형태 및 종류에 따라 사용자가 요구하는 QoS(Quality of Service)를 만족시킬 수 있는 전송 우선 순위 결정 방법을 제공하는데 그 목적이 있음.
3. 발명의 해결방법의 요지
전송할 패킷의 채널 상태에 기초한 채널 상태 가중치를 결정하는 채널 상태 가중치 결정 단계; 상기 전송할 패킷의 서비스를 받는 사용자 수에 기초하여 상기 전송할 패킷의 서비스 형태가 방송 서비스 또는 멀티캐스트 서비스인지 여부에 따라 서비스 형태 가중치를 결정하는 서비스 형태 가중치 결정 단계; 상기 전송할 패킷의 서비스 종류가 스트리밍 서비스 또는 데이터 서비스인지 여부에 따라 서비스 종류 가중치를 결정하는 서비스 종류 가중치 결정 단계; 상기 채널 상태 가중치, 서비스 형태 가중치 및 서비스 종류 가중치에 기초하여 상기 전송할 패킷에 대한 가중치를 결정하는 가중치 결정 단계; 및 상기 가중치에 기초하여 큐의 전송 우선 순위를 결정하는 전송 우선 순위 결정 단계를 포함함.
4. 발명의 중요한 용도
패킷 전송 시스템 등에 이용됨.
방송(Broadcast)/멀티캐스트(Multicast), 스케줄러, 패킷 전송, 이동 통신, 위성 통신, 적응형 전송-
公开(公告)号：KR101753399B1
公开(公告)日：2017-07-04
申请号：KR1020100131573
申请日：2010-12-21
Applicant: 한국전자통신연구원
Abstract: 본발명은다중빔위성통신시스템에서의위성장치에의한협력전송다이버시티송신방법으로, 상이한하나이상의순환지연오프셋을결정하는단계와, 상기결정된상이한순환지연오프셋으로지연된하나이상의빔을생성하여하나의사용자단말로전송하는단계를포함한다.
Abstract translation: 本发明是一种多波束在卫星通信系统eseoui根据卫星系统协同传输分集发送方法，以及确定至少一个循环延迟偏移，以在不同的循环延迟的延迟的至少一个光束的不同步骤偏移所确定的单个用户 到终端。
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公开(公告)号：KR1020130125281A
公开(公告)日：2013-11-18
申请号：KR1020120124226
申请日：2012-11-05
Applicant: 한국전자통신연구원
CPC classification number: H04L12/189 , H04B7/18513 , H04B7/18517 , H04B7/18563 , H04L5/0007 , H04L5/0037 , H04L5/0051 , H04L5/0053 , H04L27/2602 , H04L27/2614 , H04L51/10 , H04W4/06 , H04L5/0048 , H04L27/2628
Abstract: The present invention relates to a communication method for downlink transmission, which is compatible with the existing LTE-based downlink transmission and has low PAPR, for downlink in an LTE-based mobile communication system of which the performance is possibly degraded by the PAPR problem in multi-carrier transmission due to the nonlinearity of a power amplifier in a station including a satellite. Both a terminal using the existing ground LTE chipset and a terminal capable of receiving low PAPR downlink are supported without conflicts. Changes in the existing mobile communication system are minimized economically, and the integration of satellite/ground mobile communication systems are supported.
Abstract translation: 本发明涉及一种用于下行链路传输的通信方法，其与现有的基于LTE的下行链路传输兼容并且具有低PAPR，用于在基于LTE的移动通信系统中的下行链路，其中性能可能由于PAPR问题而降低 由于包括卫星的站中的功率放大器的非线性，多载波传输。 支持使用现有的地面LTE芯片组的终端和能够接收低PAPR下行链路的终端。 现有移动通信系统的变化在经济上是最小化的，并且支持卫星/地面移动通信系统的集成。
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