-
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：KR1020090009703A
公开(公告)日：2009-01-23
申请号：KR1020080063387
申请日：2008-07-01
Applicant: 한국전자통신연구원
CPC classification number: H04W48/16 , H04B1/70735 , H04B7/2656 , H04J11/0069 , H04L7/043 , H04L27/2613 , H04L27/2655 , H04W56/00 , H04W72/042 , H04W72/0446 , H04W88/08
Abstract: A method for generating a downlink frame and a method for searching a cell are provided to improve efficiency of searching the cell by receiving the downlink frame and to level interference between sectors by scrambling a short sequence to a scrambling sequence. A first shot sequence and a second short sequence indicating the cell group information are generated. A first scrambling sequence and a second scrambling sequence decided by a first synchronization sequence are generated(S510). A third scrambling sequence determined by the first shot sequence is generated. The first shot sequence is scrambled to the first scrambling sequence. The second short sequence is scrambled to the second scrambling sequence and the third scrambling sequence(S520). A second synchronization signal including the scrambled first shot sequence and the scrambled second short sequence is mapped in the frequency domain(S530). An OFDM transmission unit receives the frame of the downlink signal and transmits the frame through the transmission antenna(S540).
Abstract translation: 提供了一种用于生成下行链路帧的方法和用于搜索小区的方法，以通过接收下行链路帧来提高搜索小区的效率，并通过将短序列加扰到加扰序列来对扇区之间的干扰进行等级化。 产生指示单元组信息的第一次序列和第二个短序列。 产生由第一同步序列决定的第一加扰序列和第二加扰序列（S510）。 产生由第一拍摄序列确定的第三加扰序列。 第一个播放序列被加扰到第一个加扰序列。 将第二短序列加扰到第二加扰序列和第三加扰序列（S520）。 在频域中映射包括加扰的第一拍摄序列和加扰的第二短片段的第二同步信号（S530）。 OFDM发送单元接收下行链路信号的帧，并通过发送天线发送帧（S540）。
-
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）。
-
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。
-
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）。
-
Patent Agency Ranking
公开(公告)号：KR100874003B1
公开(公告)日：2008-12-17
申请号：KR1020070072179
申请日：2007-07-19
Applicant: 한국전자통신연구원
Abstract: A method and an apparatus for transmitting a downlink pilot signal in a mobile communication system are provided to enable a BS(Base Station) to change a scrambling code allocated to each sector and change an interference sector in each sub frame and randomize interference between the sectors, thereby preventing the continuous deterioration of channel estimation capability generated by the multiple path of the interference sector. A method for transmitting a downlink pilot signal in a mobile communication system comprises the following steps of: generating and transmitting a first downlink pilot signal corresponding to a first sector; generating and transmitting a second downlink pilot signal which corresponds to a second sector and is different from the first downlink pilot signal; and differently generating the first downlink pilot signal and the second downlink pilot signal in each sub frame.
Abstract translation: 提供了一种用于在移动通信系统中发送下行链路导频信号的方法和设备，以使得BS（基站）能够改变分配给每个扇区的扰码并且改变每个子帧中的干扰扇区并随机化扇区之间的干扰 从而防止了由干扰扇区的多路径产生的信道估计能力的持续恶化。 一种在移动通信系统中发送下行导频信号的方法，包括以下步骤：生成并发送对应于第一扇区的第一下行导频信号; 生成并发送对应于第二扇区并且与所述第一下行导频信号不同的第二下行导频信号; 并在每个子帧中不同地生成第一下行导频信号和第二下行导频信号。
-
107.发明授权
公开(公告)号：KR100859716B1
公开(公告)日：2008-09-23
申请号：KR1020070100033
申请日：2007-10-04
Applicant: 한국전자통신연구원
Abstract: 상기 기술적 과제를 해결하기 위하여 본 발명에서 제시하는 순방향 동기신호 전송방법에 관한 것으로, 무선통신 시스템에서의 순방향 동기신호 전송방법에 있어서, 복수 개의 싱크블록으로 구성되는 프레임을 생성하는 단계와 상기 프레임을 순방향 링크를 통해 전송하는 단계를 포함하고, 상기 프레임은 싱크블록 타이밍 정보를 제공하는 제1 동기채널 시퀀스 및 프레임 타이밍 정보를 제공하는 복수 개의 제2 동기채널 시퀀스를 포함하고 상기 제1 동기채널 시퀀스와 상기 복수 개의 제2 동기채널 시퀀스에 의해 셀 식별자를 특정하며, 상기 제1 동기채널 시퀀스 및 상기 복수 개의 제2 동기채널 시퀀스를 시분할 듀플렉스(Time Division Duplex) 및 주파수 분할 듀플렉스(Frequency Division Duplex) 시스템에서 모두 사용하는 것을 특징으로 하며, FDD와 TDD 모드의 듀얼모드 이동국의 복잡도를 현저히 줄이게 된다.
OFDM, 동기채널, 셀 탐색, FDD/TDD-
公开(公告)号：KR1020080082423A
公开(公告)日：2008-09-11
申请号：KR1020070091165
申请日：2007-09-07
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0606 , H04B7/06 , H04L1/0668 , H04L27/2634
Abstract: A data transmission method of a mobile communication system and a device thereof are provided to transmit data to another beam, and to apply a time diversity phase weight value and a space diversity phase weight value to factors of a precoding vector matrix, thereby improving space and time diversity gains. An SFBC(Space-Frequency Block Coding)-OFDM(Orthogonal Frequency Division Multiplexing) encoder encodes data(S310). A precoding vector multiplexer selects two different precoding vectors(S320). A precoder performs a precoding process(S330). A precoded signal matrix is converted into a transmission signal of a time domain through an IFFT(Inverse Fast Fourier Transform) process(S340). The analog transmission signal is converted into an RF(Radio Frequency) to send the converted signal(S350).
Abstract translation: 提供移动通信系统的数据发送方法及其装置，将数据发送到另一个波束，并将时间分集相位权重值和空间分集相位权重值应用于预编码向量矩阵的因子，从而提高空间和 时间多样性增长。 SFBC（空频块编码）-OFDM（正交频分复用）编码器对数据进行编码（S310）。 预编码矢量复用器选择两个不同的预编码矢量（S320）。 预编码器执行预编码处理（S330）。 通过IFFT（快速傅里叶逆变换）处理将预编码信号矩阵转换成时域的发送信号（S340）。 模拟传输信号被转换成RF（射频）以发送转换的信号（S350）。
-
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）。
-
公开(公告)号：KR1020080077899A
公开(公告)日：2008-08-26
申请号：KR1020070121320
申请日：2007-11-27
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0456 , H04L5/0007 , H04L27/2605
Abstract: A signal transmitting method and a signal receiving method are provided to demodulate broadcast channel information effectively when an MS(Mobile Station) is located at a sector boundary. A down-converter converts a received downlink signal into a baseband signal and outputs the same(S301). An SCH(Synchronization Channel) BCH(Broadcast Channel) band filter filters an SCH band signal and a BCH band signal from the baseband signal and outputs the same(S303). A cell searching unit checks a home sector and one or more target sectors through the SCH band signal(S305). A guard interval removing unit removes a guard interval such as a CP from the SCH band signal and the BCH band signal(S307). A Fourier transforming unit performs FFT(Fast Fourier Transform) on the guard interval-removed SCH band signal and BCH band signal to generate a plurality of SCH reception symbols and a plurality of BCH reception symbols transmitted in a plurality of subcarriers, and outputs the same(S309). A channel estimating unit checks whether there is a target sector which has been searched by the cell searching unit(S311). If the cell searching unit fails to acquire an ID of a target sector, the channel estimating unit estimates a channel state from the SCH reception symbols of a home sector(S313). A BCH demodulating unit estimates BCH symbols from the BCH reception symbols outputted from the Fourier transforming unit(S315). A BCH decoder performs decoding on the plurality of BCH symbols to generate BCH information(S321).
Abstract translation: 提供一种信号发送方法和信号接收方法，用于当MS（移动站）位于扇区边界时有效地解调广播信道信息。 下变频器将接收到的下行链路信号转换为基带信号并输出（S301）。 SCH（同步信道）BCH（广播信道）频带滤波器对来自基带信号的SCH频带信号和BCH频带信号进行滤波并输出（S303）。 小区搜索单元通过SCH频带信号检查归属扇区和一个或多个目标扇区（S305）。 保护间隔去除单元从SCH频带信号和BCH频带信号中去除诸如CP的保护间隔（S307）。 傅立叶变换单元对保护间隔去除的SCH频带信号和BCH频带信号执行FFT（快速傅立叶变换），以产生在多个子载波中发送的多个SCH接收符号和多个BCH接收符号，并输出 （S309）。 信道估计单元检查是否存在由小区搜索单元搜索的目标扇区（S311）。 如果小区搜索单元未能获取目标扇区的ID，则信道估计单元从家庭扇区的SCH接收符号估计信道状态（S313）。 BCH解调单元从从傅里叶变换单元输出的BCH接收符号估计BCH码元（S315）。 BCH解码器对多个BCH符号执行解码以产生BCH信息（S321）。
-
-
-
-
-
-
-
-
-
Search Results
300
records
(took 0.031 seconds)
