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公开(公告)号：KR100881169B1
公开(公告)日：2009-02-02
申请号：KR1020070074705
申请日：2007-07-25
Applicant: 한국전자통신연구원
CPC classification number: H04W56/001 , H04J11/0069 , H04J11/0093 , H04L5/0037 , H04L5/005 , H04L5/0053 , H04L27/2613 , H04L27/2655 , H04L27/2675 , H04W36/0061 , H04W36/08 , H04W56/00
Abstract: 본 발명은 OFDM 셀룰러 시스템에 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(경계)정보를 제공하는 복수 개의 제2 동기채널 시퀀스를 포함하며,상기 제1 동기채널 시퀀스와, 상기 복수 개의 제2 동기채널 시퀀스에 의해 특정되는 도약코드워드의 조합에 의해 셀 식별자를 특정하는 것을 특징으로 하고, OFDM 방식에서 효율적으로 셀 탐색 시간을 줄일 수 있다.
OFDM, 제1 동기채널 시퀀스, 제2 동기채널 시퀀스, 도약코드워드, 셀 식별자Abstract translation: 在使用OFDM的蜂窝系统中，需要前向链路同步信道，公共导频信道结构，移动台的初始小区搜索方法以及切换用的相邻小区搜索方法。 根据本发明的在无线通信系统中发送正向同步信号的方法包括：生成由多个同步块组成的帧; 并且通过前向链路发送所述帧，其中所述帧包括提供所述同步块的定时信息的主同步信道序列和提供所述帧的定时信息的多个次同步信道序列，其中小区标识符由组合 的主同步信道序列和由多个次同步信道序列指定的跳频码字。因此，可以在OFDM系统中有效地减少小区搜索时间。
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公开(公告)号：KR1020090009696A
公开(公告)日：2009-01-23
申请号：KR1020080044413
申请日：2008-05-14
Applicant: 한국전자통신연구원
IPC: H04B1/7083
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 downlink frame generating method and a cell search method for equalizing inter-sector interference are provided to reduce interference between sectors and to scramble short sequence into a scrambling sequence and to improve the performance of cell search. A sequence generation part generates a plurality of short sequences and plurality of scrambling sequences for adjacent cell interference reductions. The generated scrambling sequence is transmitted to the synchronous signal generator(S510). By using the short sequence and a plurality of scrambling sequence for the adjacent cell interference reductions received from the sequence generation part, the synchronous signal generator produces the second synchronizing signal(S520). A frequency mapping part generates a downlink frame by mapping data to be transmitted to time and frequency domain(S530). An OFDM transmission unit transmits a message through the transmission antenna(S540).
Abstract translation: 提供用于均衡扇区间干扰的下行链路帧生成方法和小区搜索方法，以减少扇区之间的干扰，并将短序列加扰成加扰序列，并提高小区搜索的性能。 序列生成部分生成用于相邻小区干扰减少的多个短序列和多个加扰序列。 所生成的加扰序列被发送到同步信号发生器（S510）。 通过使用从序列生成部分接收到的相邻小区干扰减少的短序列和多个加扰序列，同步信号发生器产生第二同步信号（S520）。 频率映射部通过将要发送的数据映射到时域和频域来生成下行链路帧（S530）。 OFDM发送单元通过发送天线发送消息（S540）。
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公开(公告)号：KR1020090006734A
公开(公告)日：2009-01-15
申请号：KR1020080061429
申请日：2008-06-27
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04W56/00 , H04J11/0069 , H04J11/0076 , H04L25/03866 , H04L27/2613 , H04L27/2655 , H04L27/2656 , H04L27/2657 , H04L27/2662
Abstract: A method for generating a downlink frame and a cell search method are provided to improve the cell search performance by making a short sequence into a scrambling sequence. A sequence generation part produces a plurality of short sequences and a plurality of scrambling sequence for reducing the neighboring cell interference, and then transmits the generated scrambling sequence to a synchronous signal generator(S510). The synchronous signal generator produces the secondary synchronous signal by using the short sequences and scrambling sequence received from the sequence generation part(S520). A frequency mapping part maps the secondary synchronous signal and transmission traffic data to the time and frequency domains to generate the frame of a downlink signal(S530). An OFDM transmission unit receives the frame of the downlink signal, and then transmits the frame through a transmission antenna(S540).
Abstract translation: 提供了一种用于生成下行链路帧和小区搜索方法的方法，通过将短序列进入加扰序列来提高小区搜索性能。 序列生成部分产生多个短序列和多个加扰序列，用于减少相邻小区干扰，然后将生成的加扰序列发送到同步信号发生器（S510）。 同步信号发生器通过使用从序列生成部分接收的短序列和加扰序列产生辅同步信号（S520）。 频率映射部分将次同步信号和传输业务数据映射到时域和频域以生成下行链路信号的帧（S530）。 OFDM发送单元接收下行链路信号的帧，然后通过发送天线发送帧（S540）。
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公开(公告)号：KR1020090004780A
公开(公告)日：2009-01-12
申请号：KR1020080065593
申请日：2008-07-07
CPC classification number: H04L27/2655 , H04L27/2602 , H04W56/00
Abstract: A method for mapping the orthogonal code within the secondary synchronization channel symbol is provided to map two short sequence numbers in efficiently by preventing the generation of collision. A binary code is mapped within the secondary synchronization channel symbol by using the non-binary code. A second non-binary code is obtained by cyclic-shifting the non-binary code. The minimum hamming distance between all coding words of the non-binary code and the second non-binary code have to be the arbitrary value or greater. The length of the non-binary code is same as those of the number of per frame binary codes. The non-binary code includes the primary synchronization channel and the secondary synchronization channel in the down link. In the down link, the secondary synchronization channel symbol is transmitted per 10 msec frame.
Abstract translation: 提供了用于映射次同步信道符号内的正交码的方法，以通过防止产生碰撞来有效地映射两个短序列号。 二进制代码通过使用非二进制代码映射在辅同步通道符号内。 通过循环移位非二进制代码获得第二个非二进制代码。 非二进制码的所有编码字和第二非二进制码之间的最小汉明距离必须是任意值或更大。 非二进制码的长度与每帧二进制码的数量相同。 非二进制码包括下行链路中的主同步信道和辅同步信道。 在下行链路中，每10毫秒帧发送次同步信道符号。
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公开(公告)号：KR1020080104936A
公开(公告)日：2008-12-03
申请号：KR1020070113705
申请日：2007-11-08
Abstract: A method for transmitting and receiving broadcast channel information is provided to transmit all the same system frame values transmitted within an update period of the broadcast channel information by using different bit mapping patterns, thereby obtaining SFN even though a receiver receives only one coding block. First broadcast channel information including a first system frame value is transmitted by using a first bit mapping pattern in a first frame. The first broadcast channel information is transmitted by using the first and second bit mapping patterns in a second frame.
Abstract translation: 提供了一种用于发送和接收广播信道信息的方法，以便通过使用不同的比特映射模式来发送在广播信道信息的更新周期内发送的所有相同的系统帧值，从而即使接收方只接收一个编码块，也获得SFN。 通过使用第一帧中的第一比特映射模式来发送包括第一系统帧值的第一广播频道信息。 通过使用第二帧中的第一和第二比特映射模式来发送第一广播频道信息。
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Patent Agency Ranking
公开(公告)号：KR1020080087658A
公开(公告)日：2008-10-01
申请号：KR1020080016820
申请日：2008-02-25
CPC classification number: H04L27/20 , H04L1/1607 , H04L27/227
Abstract: A method for transmitting and receiving bit information is provided to improve the performance of a system by using a binary quadrature phase shift key. A method for transmitting and receiving bit information includes the steps of: generating bit information corresponding to a signal to be transmitted(S11); selecting two time region codes of a plurality of time region codes(S12); generating a complex symbol corresponding to the bit information using two time region codes(S14); and transmitting the bit information using the complex symbol(S20). The complex symbol generation step includes the steps of: generating four time region codes by phase-modulating two time region codes; and generating a complex symbol by selecting one of four time region codes in response to the bit information.
Abstract translation: 提供了一种用于发送和接收比特信息的方法，以通过使用二进制正交相移键提高系统的性能。 一种发送和接收比特信息的方法包括以下步骤：产生与要发送的信号相对应的比特信息（S11）; 选择多个时区代码的两个时区码（S12）; 使用两个时区代码生成与比特信息对应的复数符号（S14）; 以及使用所述复合符号发送所述位信息（S20）。 复合符号生成步骤包括以下步骤：通过对两个时区代码进行相位调制来产生四个时区码; 以及通过响应于位信息选择四个时区代码之一来生成复符号。
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公开(公告)号：KR1020080079577A
公开(公告)日：2008-09-01
申请号：KR1020070118511
申请日：2007-11-20
Applicant: 한국전자통신연구원
CPC classification number: H04L1/0618 , H04B7/0613 , H04B7/0697 , H04L1/0031 , H04L27/2662
Abstract: A signal transmission method is provided to be capable of magnifying a diversity gain within a transmission time interval of broadcasting channel information by applying a cyclic delay diversity method to the broadcasting channel information, as efficiently removing interference. Plural cyclic delay values individually corresponding to plural transmission antennas are set(S201-S207). The plural cyclic delay values are individually applied to plural broadcasting channel symbols(S209). The plural broadcasting channel symbols are transmitted through the plural transmission antennas(S211). The cyclic delay values are determined according to time assigned with the broadcasting channel symbols.
Abstract translation: 提供了一种信号传输方法，其能够通过对广播信道信息应用循环延迟分集方法来扩大广播信道信息的传输时间间隔内的分集增益，从而有效地去除干扰。 分别对应于多个发送天线的多个循环延迟值被设定（S201〜S207）。 多个循环延迟值分别应用于多个广播信道符号（S209）。 通过多个发送天线发送多个广播信道符号（S211）。 根据分配有广播频道符号的时间确定循环延迟值。
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公开(公告)号：KR1020080071065A
公开(公告)日：2008-08-01
申请号：KR1020070132635
申请日：2007-12-17
CPC classification number: H04B1/707 , H04B7/02 , H04L5/0053 , H04L27/2626
Abstract: A transmission diversity method for a forward link channel in a wireless communication system and a signal processing method are provided to improve transmission diversity for an MC-CDMA(Multi-Carrier Code Division Multiple Access) type channel in an OFDM(Orthogonal Frequency Division Multiplexing)-based downlink by being used to ACK/NACK channels. Predetermined different output symbols are generated from plural input symbols at one random modulation symbol interval(S900). Orthogonal codes are generated(S910). The output symbols are spread by using the orthogonal codes. The spread output symbols are crossed together as being combined, and the combined output symbols are outputted to each transmission path.
Abstract translation: 提供了一种用于无线通信系统中的前向链路信道的传输分集方法和信号处理方法，以改善OFDM（正交频分复用）中的MC-CDMA（多载波码分多址）类型信道的传输分集， 的下行链路用于ACK / NACK信道。 以一个随机调制符号间隔从多个输入符号生成预定的不同输出符号（S900）。 生成正交码（S910）。 输出符号通过使用正交码进行扩展。 扩展输出符号被组合在一起，并且组合的输出符号被输出到每个传输路径。
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59.发明公开
公开(公告)号：KR1020080066467A
公开(公告)日：2008-07-16
申请号：KR1020070003952
申请日：2007-01-12
CPC classification number: H04W74/08 , H04L5/0007 , H04L27/26 , H04L27/2672
Abstract: A method for multiplexing a random access preamble for a low speed mobile station and a random access preamble for a high speed mobile station based on a frequency axis is provided to reduce interference between mobile stations by multiplexing a random access band based on a frequency axis in an uplink of a cellular system. A method for multiplexing a random access preamble for a low speed mobile station and a random access preamble for a high speed mobile station based on a frequency axis includes the steps of: multiplexing a random access band using a preamble(100) which is used in a mobile station of a high speed, and a random access band using a preamble(110) which is used in a mobile station of a low speed on a frequency band. All of the mobile station of a high speed and the mobile station of a low speed perform easily a random access by allocating the different number of random access band using the preamble which is used in the mobile station of the high speed and random access band using the preamble which is used in the mobile station of the low speed to the cell based on the characteristics of the cell.
Abstract translation: 提供一种用于基于频率轴多路复用低速移动站的随机接入前同步码和高速移动台的随机接入前导码的方法，以通过基于频率轴的随机接入频带复用随机接入频带来减少移动台之间的干扰 蜂窝系统的上行链路。 一种用于低速移动台的随机接入前导码和基于频率轴的高速移动台的随机接入前同步码的方法包括以下步骤：使用前导码（100）多路复用随机接入频带 高速移动站和使用在频带上的低速移动站中使用的前导码（110）的随机接入频带。 所有高速移动站和低速移动站均通过使用在高速和随机接入频带的移动台中使用的前同步码分配不同数量的随机接入频带来轻松执行随机接入，所述前导码使用 基于小区的特性，在低速小区的移动站中使用的前导码。
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公开(公告)号：KR1020080045601A
公开(公告)日：2008-05-23
申请号：KR1020070072175
申请日：2007-07-19
CPC classification number: H04W74/08 , H04B7/0617 , H04B7/0639 , H04B7/12
Abstract: A random access method and a random access response method are provided to enable a base station to perform beam forming of response data for a random access response message or a first uplink message by using fed-back precoding vector information and transmit the data, thereby improving reliability of a base station response. A random access method comprises the following steps of: transmitting at least one broadcasting signal; receiving an index of a precoding vector, selected based on at least broadcasting signal among plural precoding vectors, from a mobile station(S105); and transmitting a response to random access of the mobile station by using the selected precoding vector(S106).
Abstract translation: 提供了一种随机接入方法和随机接入响应方法，使得基站能够通过使用反馈预编码向量信息并发送数据来对随机接入响应消息或第一上行链路消息执行响应数据的波束形成，由此改善 基站响应的可靠性。 随机接入方法包括以下步骤：发送至少一个广播信号; 从移动台接收至少基于多个预编码矢量中的广播信号选择的预编码矢量的索引（S105）; 以及通过使用所选择的预编码向量来发送对所述移动站的随机接入的响应（S106）。
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