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公开(公告)号：KR1020090065170A
公开(公告)日：2009-06-22
申请号：KR1020070132633
申请日：2007-12-17
CPC classification number: H04W52/24 , H04L1/004 , H04W52/20 , H04W52/241
Abstract: A method for controlling a reference power ratio by using a reference channel is provided to buff phenomena that power is temporarily increased or power is temporarily decreased. A change amount of a receiving SINR(Signal-to-Interference-plus-Noise Ratio) is calculated by calculating a difference between an average SINR of a calculated previous channel window section and an average SINR of a calculated present channel window section(S250). Detection of error is checked. A reference SINR is controlled by using the receiving SINR and the change amount(S260).
Abstract translation: 提供了通过使用参考通道来控制参考功率比的方法用于暂时增加功率或暂时降低功率的抛光现象。 通过计算计算出的前一通道窗口部分的平均SINR与计算出的当前通道窗口部分的平均SINR之间的差来计算接收SINR（信号与干扰加噪声比）的变化量（S250） 。 检查错误。 通过使用接收SINR和变化量来控制参考SINR（S260）。
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32.发明授权
公开(公告)号：KR100889754B1
公开(公告)日：2009-03-24
申请号：KR1020070089928
申请日：2007-09-05
Abstract: 본 발명은 ＯＦＤＭ 셀룰러 시스템에서의 셀 고유번호 개수 증가에 적합한 동기신호 전송방법 및 동기채널 프레임 구조에 관한 것으로, 무선통신 시스템에서의 순방향 동기신호 전송방법에 있어서, 복수 개의 심볼로 구성되는 프레임을 생성하는 단계와 상기 프레임을 순방향 링크를 통해 전송하는 단계를 포함하고, 상기 프레임은 동일한 시간의 심볼 내의 주파수에 따라 구분된 주동기채널(P-SCH) 및 부동기채널(S-SCH)을 포함하며, 상기 주동기채널과 상기 부동기채널을 이용하여 검출된 코드번호의 패턴에 의해 셀 식별자를 특정하는 것을 특징으로 하며, 일정 시간 범위에서 부동기채널 신호의 반복 패턴이 증가하게 함으로써 단말기의 주파수 오차 추정 성능을 향상시키는 효과가 있다.
주동기채널(P-SCH), 부동기채널(S-SCH), 동기신호, 순방향 링크 프레임-
公开(公告)号：KR100885476B1
公开(公告)日：2009-02-24
申请号：KR1020070042760
申请日：2007-05-02
Abstract: 본 발명은 직교 주파수 분할 다중 접속(Orthogonal Frequency Division Multiple Access: 이하, OFDMA) 시스템에서의 하향링크 스케줄링 정보 송/수신 방법 및 장치에 관한 것으로, 이 송신 방법은 OFDMA 시스템의 하향 링크 자원으로 구성된 자원블록들 중에서, 적어도 하나의 자원블록을 각 단말에 할당하는 할당단계; 상기 각 단말에 대해, 상기 할당된 자원블록 중에서 소정의 조건에 따라 자원블록을 선택하는 선택단계; 상기 각 단말에 대해, 상기 단말의 자원할당정보 및 상기 단말을 식별하기 위한 식별정보를 포함하는 스케줄링 정보를 생성하는 생성단계; 및 상기 각 단말에 대해, 선택된 자원블록을 이용하여 상기 단말의 스케줄링 정보를 전송하는 전송단계를 포함한다. 본 발명에 따르면, 스케줄링의 자유도를 줄이지 않으면서 스케줄링 정보의 전송에 사용되는 하향 링크 자원의 량을 줄일 수 있다.
OFDM, OFDMA, 하향링크 제어정보, 스케줄링 정보, 자원할당 정보, 개별적 코딩, 그룹별 코딩, 비트맵-
公开(公告)号：KR100884382B1
公开(公告)日：2009-02-17
申请号：KR1020070073319
申请日：2007-07-23
Abstract: 프리앰블 생성 장치는 주파수 영역에서 시퀀스를 생성하고, 시퀀스를 푸리에 역변환하여 시간 영역에서 푸리에 역변환 신호를 생성하며, 푸리에 역변환 신호를 인터폴레이션하여 프리앰블을 생성한다. 이를 통해 큰 크기의 DFT/IDFT를 사용하지 않고 프리앰블을 생성할 수 있다.
프리앰블, 채널, 응답-
公开(公告)号：KR1020090009102A
公开(公告)日：2009-01-22
申请号：KR1020080056236
申请日：2008-06-16
CPC classification number: H04J11/0069 , H04J11/0076 , H04J13/16 , H04L5/0007 , H04L5/0053 , H04L27/26 , H04L27/261 , H04W48/16 , H04L25/03866
Abstract: A method for generating a downlink frame and a method for searching a cell are provided to improve cell searching performance by reducing interference between sectors by scrambling two sequences with different scrambling codes. A sequence generator generates a plurality of sequences, and a plurality of scrambling sequences and transmits the sequences to the synchronization signal generator(S410). A synchronization signal generator generates a second synchronization signal by using the plurality of sequences received from the sequence generator, and the plurality of scrambling sequences(S420). A frequency mapping device maps the data to be transmitted by using the synchronization signal generated in the synchronization signal generator and transmission traffic data as the time and frequency domains and generates the frame of the downlink signal(S430). The OFDM transmitter receives the frame of the downlink signal and transmits the frame through a transmission antenna(S440).
Abstract translation: 提供一种用于生成下行链路帧的方法和用于搜索小区的方法，以通过利用不同扰码对两个序列进行扰频来减少扇区之间的干扰来提高小区搜索性能。 序列生成器生成多个序列和多个加扰序列，并将序列发送到同步信号发生器（S410）。 同步信号发生器通过使用从序列发生器接收的多个序列和多个加扰序列来产生第二同步信号（S420）。 频率映射设备通过使用在同步信号发生器中生成的同步信号和传输业务数据作为时间和频域来映射要发送的数据，并生成下行链路信号的帧（S430）。 OFDM发射机接收下行链路信号的帧，并通过发送天线发送帧（S440）。
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Patent Agency Ranking
公开(公告)号：KR1020080110555A
公开(公告)日：2008-12-18
申请号：KR1020080056568
申请日：2008-06-16
IPC: H04J11/00
CPC classification number: H04L5/0016 , H04J13/0074 , H04L5/0017 , H04L5/0019 , H04L5/0021 , H04L5/0037 , H04L5/0048 , H04L5/0053 , H04L5/0055 , H04J11/0023 , H04L1/12
Abstract: A method for transmitting signal in wireless communication system using time and frequency domain at the same time is provided to efficiently reduce interference between cells by using a code hopping method. A method for transmitting signal in wireless communication system using time and frequency domain at the same time comprises the following steps: a step for assigning an identical frequency domain discrimination sequence and a unlike time domain discrimination sequence into a plurality of terminals by a resource index according to the first slot in a first slot; and a step for assigning a unlike frequency domain discrimination sequence and a unlike time domain discrimination sequence into a plurality of terminals by a resource index according to the second slot in a second slot.
Abstract translation: 提供了一种在同时使用时域和频域的无线通信系统中发送信号的方法，以通过使用跳频方法来有效降低小区之间的干扰。 同时使用时域和频域在无线通信系统中发送信号的方法包括以下步骤：通过资源索引将相同的频域鉴别序列和不同的时域鉴别序列分配给多个终端的步骤 到第一槽中的第一槽; 以及通过第二时隙中的第二时隙的资源索引，将不同的频域判别序列和不同的时域判别序列分配给多个终端的步骤。
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公开(公告)号：KR1020080110176A
公开(公告)日：2008-12-18
申请号：KR1020070058589
申请日：2007-06-14
CPC classification number: H04L1/1812 , H04B7/0452 , H04L1/1621 , H04L5/0055 , H04L27/26
Abstract: A method for transmitting ACK/NACK though frequency division multiplexing for transmitting ACK/NACK bit is provided to improve efficiency of down link wireless resource by suggesting an efficient ACK/NACK channel transmitting method. A method for transmitting ACK/NACK though frequency division multiplexing for transmitting ACK/NACK bit supports HARQ(Hybrid Automatic Repeat request) in a wireless communications system supporting multi-user MIMO(Multi Input Multi Output). Mobile stations using an identical upward link resource performs a frequency division multiplexing. Mobile stations using a different upward link each other transmits ACK(ACKnowledgement)/NACK(Negative ACKnowledgement) multiplexed by a code division multiplexing or a frequency division multiplexing.
Abstract translation: 提供了一种通过用于发送ACK / NACK比特的频分复用来发送ACK / NACK的方法，通过提出有效的ACK / NACK信道发送方法来提高下行链路无线资源的效率。 通过用于发送ACK / NACK比特的频分复用来发送ACK / NACK的方法在支持多用户MIMO（多输入多输出）的无线通信系统中支持HARQ（混合自动重传请求）。 使用相同上行链路资源的移动台进行频分复用。 使用彼此不同的向上链路的移动站彼此发送通过码分复用或频分复用复用的ACK（确认）/ NACK（否定确认）。
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公开(公告)号：KR1020080079578A
公开(公告)日：2008-09-01
申请号：KR1020070118533
申请日：2007-11-20
CPC classification number: H04B7/0491 , H04L27/2608 , H04L27/2626
Abstract: A signal transmission method and a downlink frame generation method are provided to be capable of magnifying a time diversity gain within a TTI(Transmission Time Interval) of broadcasting channel information by applying a precoding vector switching diversity method to the broadcasting channel information, as efficiently removing interference. A channel encoder generates and outputs channel-encoded BCH(Broadcasting Channel) data(S201). An SCH(Synchronization Channel) symbol generator generates and outputs plural SCH symbols(S203). Plural other channel symbols are generated and outputted(S205). Precoding vectors are applied to BCH symbols to output the BCH symbols, while the SCH symbols and the other channel symbols are switched, then the switched symbols are outputted to the first and second transmitters(S207).
Abstract translation: 提供了一种信号传输方法和下行链路帧生成方法，其能够通过对广播信道信息应用预编码向量切换分集方法来放大广播信道信息的TTI（传输时间间隔）内的时间分集增益，作为有效地去除 干扰。 信道编码器生成并输出信道编码BCH（广播信道）数据（S201）。 SCH（同步信道）符号发生器产生并输出多个SCH符号（S203）。 生成并输出多个其他通道符号（S205）。 将预编码向量应用于BCH符号以输出BCH符号，同时切换SCH符号和其它信道符号，然后将切换的符号输出到第一和第二发射机（S207）。
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公开(公告)号：KR1020080073192A
公开(公告)日：2008-08-08
申请号：KR1020070080064
申请日：2007-08-09
CPC classification number: H04W52/245 , H04W52/42
Abstract: A random access preamble transmission method is provided to enable an MS(Mobile Station) to send a random access preamble by selecting one of antennas according to a downlink channel state, thereby reducing delay time occurring when the random access preamble is transmitted. An MS receives a BCH(Broadcasting Channel) signal periodically transmitted from a base station(S100). The MS measures received power for each of two antennas(S101). The MS determines an antenna having high received power as a random access preamble transmission antenna(S102). The MS determines received power of the MS(S103). The MS determines random access preamble transmission power by using an open loop power control method(S104). The MS transmits a random access preamble of the determined transmission power by using the determined transmission antenna(S105).
Abstract translation: 提供一种随机接入前同步码传输方法，使MS（移动台）能够根据下行链路信道状态选择一个天线来发送随机接入前同步码，从而减少发送随机接入前导码时发生的延迟时间。 MS接收从基站周期性发送的BCH（广播信道）信号（S100）。 MS测量两个天线中的每一个的接收功率（S101）。 MS确定具有高接收功率的天线作为随机接入前导码发射天线（S102）。 MS确定MS的接收功率（S103）。 MS通过使用开环功率控制方法来确定随机接入前导码发射功率（S104）。 MS通过使用所确定的发送天线来发送所确定的发送功率的随机接入前导码（S105）。
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公开(公告)号：KR1020080049596A
公开(公告)日：2008-06-04
申请号：KR1020070074431
申请日：2007-07-25
CPC classification number: H04B7/2612 , H04W72/0413 , H04W74/006 , H04W74/0833
Abstract: A random access method and a random access response method are provided to enable an MS to select a downlink resource optimized to a downlink channel status and transmit information about the downlink resource to a BS(Base Station) when the MS attempts random access, thereby increasing the transfer rate of the random access response of the BS to improve the reliability of the random access response of the BS. A random access response method comprises the following steps of: transmitting a common pilot signal(S101); receiving the index of at least one downlink resource selected on the basis of the common pilot signal from an MS(Mobile Station)(S103); and transmitting a response to the random access of the MS by using the index of at least one downlink resource(S104).
Abstract translation: 提供了一种随机接入方法和随机接入响应方法，以使MS能够选择对下行链路信道状态优化的下行链路资源，并且当MS尝试随机接入时，向BS（基站）发送关于下行链路资源的信息，从而增加 BS的随机接入响应的传输速率，以提高BS的随机接入响应的可靠性。 随机接入响应方法包括以下步骤：发送公共导频信号（S101）; 基于来自MS（移动台）的公共导频信号，接收选择的至少一个下行链路资源的索引（S103）; 以及通过使用至少一个下行链路资源的索引来发送对所述MS的随机接入的响应（S104）。
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