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1. 发明申请

WO2007142393A1 RESOURCE ALLOCATION METHOD FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING ACCESS SYSTEM 审中-公开
标题翻译：正交频分多址接入系统的资源分配方法
公开(公告)号：WO2007142393A1
公开(公告)日：2007-12-13
申请号：PCT/KR2006/004459
申请日：2006-10-30
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , INDUSTRY ACADEMIC COOPERATION FOUNDATION OF KYUNGHEE UNIVERSITY , HWANG, Sung-Hyun , SONG, Myung-Sun , KIM, Chang-Joo , KIM, Yun-Hee , WON, Jae-Yun
发明人： HWANG, Sung-Hyun , SONG, Myung-Sun , KIM, Chang-Joo , KIM, Yun-Hee , WON, Jae-Yun
IPC分类号： H04L27/26
CPC分类号： H04L27/2608 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0027 , H04L5/0007 , H04L5/0039 , H04L5/0044 , H04L5/0048 , H04L5/006 , H04L5/0085 , H04L5/023
摘要： A resource allocation method for an orthogonal frequency division multiplexing access (OFDMA) system is provided. The resource allocation method includes dividing a frequency band occupied by a predetermined number of OFDM symbols into a plurality of subbands and determining the number of diversity subchannels, each of which comprises at least two time-frequency resources respectively included in different subbands, and the number of subband selective subchannels, which comprise time-frequency resources that are not included in the diversity subchannels; and generating the diversity subchannels and the subband selective subchannels according to the determined numbers and allocating a physical channel comprised of a generated subchannel to a user in a cell. Accordingly, diversity is enhanced without reducing the freedom of selection of a subband.
摘要翻译：提供了一种用于正交频分复用接入（OFDMA）系统的资源分配方法。资源分配方法包括将预定数量的OFDM符号占据的频带划分成多个子带，并确定分集子信道的数量，每个子信道包括分别包括在不同子带中的至少两个时间频率资源，以及数目子带选择性子信道，其包括不包括在分集子信道中的时间 - 频率资源; 以及根据确定的号码生成分集子信道和子带选择性子信道，并将由生成的子信道组成的物理信道分配给小区中的用户。因此，在不降低子带选择的自由度的情况下增强分集。

2. 发明申请

WO2007052995A1 METHOD FOR USING FLEXIBLE BANDWIDTH IN OFDMA-BASED COGNITIVE RADIO SYSTEM, BASE STATION AND SUBSCRIBER STATION USING THE SAME 审中-公开
标题翻译：基于OFDMA的认知无线电系统中使用灵活带宽的方法，使用该方法的基站和订户站
公开(公告)号：WO2007052995A1
公开(公告)日：2007-05-10
申请号：PCT/KR2006/004651
申请日：2006-11-07
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , HWANG, Sung-Hyun , SONG, Myung-Sun , KIM, Yun-Hee , KIM, Chang-Joo
发明人： HWANG, Sung-Hyun , SONG, Myung-Sun , KIM, Yun-Hee , KIM, Chang-Joo
IPC分类号： H04L27/26
CPC分类号： H04L5/0044 , H04L5/0007 , H04L5/0037 , H04L5/0053 , H04L5/0064 , H04L5/0094
摘要： Provided are a method for using a flexible bandwidth in an orthogonal frequency division multiple access (OFDMA)-based cognitive radio system, and a base station (BS) and a subscriber station using the method. The method includes: allocating a channel band from among unused channel bands having a bandwidth that is a natural number times a bandwidth resolution to customer premises equipment (CPE), wherein the bandwidth resolution is a predetermined bandwidth smaller than a bandwidth of a broadcast channel band, and transmitting an OFDMA-based signal comprising band allocation information indicating information regarding the allocated channel band.
摘要翻译：提供了一种在基于正交频分多址（OFDMA）的认知无线电系统中使用灵活带宽的方法，以及使用该方法的基站（BS）和订户站。该方法包括：从具有自然数乘以带宽分辨率的带宽的未使用信道频带分配给客户端设备（CPE）的信道频带，其中带宽分辨率是比广播信道频带的带宽小的预定带宽并且发送包括指示关于所分配的信道频带的信息的频带分配信息的基于OFDMA的信号。

3. 发明申请

WO2008111762A1 METHOD OF AND APPARATUS FOR ALLOCATING SUB-CHANNELS IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACESS (OFDMA) SYSTEM 审中-公开
标题翻译：在正交频分多通道（OFDMA）系统中分配子通道的方法和装置
公开(公告)号：WO2008111762A1
公开(公告)日：2008-09-18
申请号：PCT/KR2008/001286
申请日：2008-03-06
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , UM, Jung-Sun , HWANG, Sung-Hyun , KIM, Chang-Joo , SONG, Myung-Sun
发明人： UM, Jung-Sun , HWANG, Sung-Hyun , KIM, Chang-Joo , SONG, Myung-Sun
IPC分类号： H04L27/26
CPC分类号： H04L5/023 , H04L5/0039 , H04L5/0041 , H04L5/006
摘要： A method and apparatus for allocating subchannels in an orthogonal frequency division multiple access (OFDMA) system is provided. In the method and apparatus, mixed bands in each of which adjacent subcarriers and distributed subcarriers are mixed are used to form a band of a basic physical resource. Accordingly, diversity subchannels each comprised of distributed subcarriers distributed over the whole band and band subchannels each comprised of adjacent subcarriers adjacent to parts of the band are formed in a single OFDMA symbol, thereby simultaneously and flexibly allocating subchannels to users.
摘要翻译：提供了一种用于在正交频分多址（OFDMA）系统中分配子信道的方法和装置。在该方法和装置中，使用相邻副载波和分布式副载波混合的混合频带，形成基本物理资源的频带。因此，在单个OFDMA符号中形成各自包含分布在整个频带上的分布式子载波的分集子信道和每个包括与频带部分相邻的相邻子载波的频带子信道，从而同时且灵活地向用户分配子信道。

4. 发明申请

WO2007123364A1 METHOD OF GENERATING PILOT PATTERN FOR ADAPTIVE CHANNEL ESTIMATION IN OFDMA SYSTEMS, METHOD OF TRANSMITTING/RECEIVING USING THE PILOT PATTERN AND APPARATUS THEREOF 审中-公开
标题翻译：在OFDMA系统中生成用于自适应信道估计的导频图案的方法，使用导频图案发送/接收的方法及其装置
公开(公告)号：WO2007123364A1
公开(公告)日：2007-11-01
申请号：PCT/KR2007/002004
申请日：2007-04-24
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , HWANG, Sung-Hyun , KIM, Chang-Joo , SONG, Myung-Sun , UM, Jung-Sun
发明人： HWANG, Sung-Hyun , KIM, Chang-Joo , SONG, Myung-Sun , UM, Jung-Sun
IPC分类号： H04L27/26
CPC分类号： H04W72/0406 , H04L5/0007 , H04L5/0048
摘要： Provided is a method of generating a pilot pattern capable of perform adaptive channel estimation, and a method and apparatus of a base station and a method and apparatus of a terminal using the pilot pattern. The pilot pattern selects pilot symbol positions based on distances from pilots of previous orthogonal frequency division multiple access (OFDMA) symbols to a subcarrier position of a current OFDMA symbol in the frequency domain and the time domain, so that a low pilot density is maintained so as to effectively transmit data, and stable channel estimation performance can be obtained even in a bad channel environment. In addition, the minimum burst allocation size is determined according to the channel environment between the base station and the terminal, guaranteeing channel estimation performance suitable for the channel environment, and improving granularity, channel estimation latency, and channel estimation memory size.
摘要翻译：提供了一种生成能够执行自适应信道估计的导频模式的方法，以及基站的方法和装置以及使用导频模式的终端的方法和装置。导频模式基于从先前的正交频分多址（OFDMA）符号的导频到频域和时域中的当前OFDMA符号的子载波位置的距离来选择导频符号位置，从而维持低导频密度为了有效地发送数据，即使在恶劣的信道环境中也可以获得稳定的信道估计性能。另外，根据基站和终端之间的信道环境确定最小突发分配大小，保证适合信道环境的信道估计性能，提高粒度，信道估计延迟和信道估计存储器大小。

5. 发明申请

WO2008130165A1 METHOD AND APPARATUS OF GENERATING SIGNALS FOR INITIAL RANGING IN OFDMA SYSTEM 审中-公开
标题翻译：在OFDMA系统中初始范围生成信号的方法和装置
公开(公告)号：WO2008130165A1
公开(公告)日：2008-10-30
申请号：PCT/KR2008/002229
申请日：2008-04-21
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , UM, Jung-Sun , HWANG, Sung-Hyun , KIM, Chang-Joo , SONG, Myung-Sun
发明人： UM, Jung-Sun , HWANG, Sung-Hyun , KIM, Chang-Joo , SONG, Myung-Sun
IPC分类号： H04L27/26
CPC分类号： H04L27/2601 , H04L5/0048 , H04L27/2613 , H04L27/2656
摘要： Provided is a method and apparatus of generating signals for initial ranging in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The method, includes: generating a plurality of ranging symbols by cyclic-shifting sample data of a ranging symbol in one OFDMA symbol period as much as a value obtained by multiplying a cyclic prefix size by a symbol index; generating a ranging signal by copying a rear part corresponding to the cyclic prefix size in the sample data with respect to each of the ranging symbols and inserting the copied rear part in front of the sample data as a cyclic prefix.
摘要翻译：提供了一种在正交频分多址（OFDMA）系统中生成用于初始测距的信号的方法和装置。该方法包括：通过循环移位一个OFDMA符号周期中的测距符号的采样数据，生成多个测距符号，其数量与通过将循环前缀大小乘以符号索引而获得的值一样多; 通过将相对于每个测距符号的采样数据中的循环前缀大小相对应的后部复制并作为循环前缀插入到采样数据的前面，生成测距信号。

6. 发明申请

WO2007094604A1 METHOD FOR SENSING SPECTRUM AND ARRANGING QUIET PERIOD IN COGNITIVE RADIO SYSTEM, CUSTOMER PREMISE EQUIPMENT, BASE STATION AND SUPERFRAME STRUCTURE USING THE SAME 审中-公开
标题翻译：用于感应无线电系统中的光谱和安装周期的方法，客户设备设备，基站和使用其的超级结构
公开(公告)号：WO2007094604A1
公开(公告)日：2007-08-23
申请号：PCT/KR2007/000776
申请日：2007-02-14
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , KANG, Bub-Joo , KO, Gwangzeen , HWANG, Sung-Hyun , SONG, Myung-Sun , KIM, Chang-Joo
发明人： KANG, Bub-Joo , KO, Gwangzeen , HWANG, Sung-Hyun , SONG, Myung-Sun , KIM, Chang-Joo
IPC分类号： H04L12/28
CPC分类号： H04B1/69 , H04W16/14 , H04W72/082
摘要： Provided are methods of spectrum sensing and assigning quiet periods in a cogn itive radio system in order to increase the reliability of detection regarding whether an in cumbent user appears in his/her frequency channel, customer premises equipment (CP E), a base station, and the structure of a super frame for performing the methods. The spectrum sensing method includes communicating with a base station (BS) and perfor ming spectrum sensing for frequency channels having quiet periods (QPs) during the Q Ps of the frequency channels used in the cognitive radio system, wherein the QPs of th e frequency channels do not overlap each other.
摘要翻译：提供了在认知无线电系统中频谱感测和分配静音周期的方法，以便增加检测关于他/她的频率信道，客户端设备（CP E），基站，以及用于执行方法的超帧的结构。频谱感测方法包括在认知无线电系统中使用的频率信道的Q Ps期间与基站（BS）进行通信并且对频段具有安静周期（QP）进行频谱感测，其中频率信道的QP 不要重叠。

7. 发明申请

WO2010071337A2 HYBRID BEACONING METHOD 审中-公开
标题翻译：混合网络方法
公开(公告)号：WO2010071337A2
公开(公告)日：2010-06-24
申请号：PCT/KR2009/007485
申请日：2009-12-15
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , KO, Gwangzeen , LEE, Moon-Won , YOU, Sung-Jin , HWANG, Sung-Hyun , UM, Jung-Sun , SONG, Myung-Sun , KIM, Chang-Joo
发明人： KO, Gwangzeen , LEE, Moon-Won , YOU, Sung-Jin , HWANG, Sung-Hyun , UM, Jung-Sun , SONG, Myung-Sun , KIM, Chang-Joo
IPC分类号： H04L12/28
CPC分类号： H04W48/08 , H04W88/06
摘要： Provided is a hybrid beaconing method in which a centralized beaconing scheme and a distributed beaconing scheme are combined. In the hybrid beaconing method, a beaconing scheme is converted according to a network condition, and a centralized beaconing scheme or a distributed beaconing scheme is used to maintain an optimum network status
摘要翻译：提供了组合中央信标方案和分布式信标方案的混合信标方法。在混合信标方法中，根据网络条件转换信标方案，并使用集中式信标方案或分布式信标方案来维持最佳网络状态

8. 发明申请

WO2009078606A1 CHANNEL SWITCHING APPARATUS AND METHOD OF A BASE STATION AND CHANNEL SWITCHING APPARATUS AND METHOD OF A TERMINAL BASED ON THE COGNITIVE RADIO SYSTEM 审中-公开
标题翻译：信道切换装置和基站和信道切换装置的方法和基于认知无线电系统的终端的方法
公开(公告)号：WO2009078606A1
公开(公告)日：2009-06-25
申请号：PCT/KR2008/007190
申请日：2008-12-05
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , KO, Gwangzeen , YOU, Sung-Jin , SONG, Myung-Sun , HWANG, Sung-Hyun , UM, Jung-Sun , KIM, Chang-Joo
发明人： KO, Gwangzeen , YOU, Sung-Jin , SONG, Myung-Sun , HWANG, Sung-Hyun , UM, Jung-Sun , KIM, Chang-Joo
IPC分类号： H04B7/155
CPC分类号： H04W48/12 , H04W16/14 , H04W36/06 , H04W72/042 , H04W72/0446
摘要： In a cognitive radio system, when communication in an operational channel is determined to be discontinued due to that an incumbent user (IU) entering the operational channel that is currently being used or due to that an excessive interference occurring in the operational channel, the operational channel is switched to a pre-arranged channel. However, since some parameters are different between the operational channel and the pre-arranged channel, an initialization procedure has to be performed to allow the cognitive radio system to be adapted to those some parameters. Since an initialization technique aiming for this situation is not developed yet, a conventional cognitive radio system uses a general initialization technique used to initially operate a system. However, the general initialization technique has to allow the system to be adapted to many parameters so that it takes a relatively long initialization time. A channel switching apparatus and method thereof of a base station, which allocates a slot for data exchange with each of a plurality of terminals in a frequency channel that is not used by the IU and thus performs communication, include transmitting a channel switching message for requesting to switch to a backup channel when a signal of the IU is sensed in the frequency channel; transmitting a beacon frame via the backup channel, wherein the beacon frame comprises allocation information about slots which are in the frequency channel and which are respectively allocated to each of the plurality of terminals; and allocating the slot for data exchange with each of the plurality of terminals to the backup channel according to the allocation information, and communicating with each of the plurality of terminals. By doing so, frequency resources between each of networks can be efficiently used, and convenience and efficiency with respect to network operation can be maximized.
摘要翻译：在认知无线电系统中，当由于现有用户（IU）进入当前正在使用的操作信道或由于在操作信道中发生的过度干扰而确定操作信道中的通信被中断时，操作通道切换到预先安排的通道。然而，由于操作信道和预先安排的信道之间的一些参数不同，因此必须执行初始化过程以允许认知无线电系统适应那些一些参数。由于尚未开发针对这种情况的初始化技术，传统的认知无线电系统使用用于初始操作系统的一般初始化技术。然而，一般的初始化技术必须允许系统适应许多参数，从而需要较长的初始化时间。一种基站的信道切换装置及其方法，其分配与IU未使用的频道中的多个终端中的每一个进行数据交换的时隙，从而进行通信，包括：发送用于请求的信道切换消息当在频率信道中感测到IU的信号时切换到备用信道; 经由所述备份信道发送信标帧，其中，所述信标帧包括关于处于所述频道中并且分别分配给所述多个终端中的每一个的时隙的分配信息; 以及根据所述分配信息将与所述多个终端中的每一个进行数据交换的时隙分配给备份信道，并与所述多个终端中的每一个进行通信。通过这样做，可以有效地利用每个网络之间的频率资源，并且可以最大限度地提高网络操作的便利性和效率。

9. 发明申请

WO2009075519A1 NETWORK COMMUNICATION METHOD AND NETWORK DEVICE USING PREAMBLE 审中-公开
标题翻译：网络通信方法和使用前缀的网络设备
公开(公告)号：WO2009075519A1
公开(公告)日：2009-06-18
申请号：PCT/KR2008/007298
申请日：2008-12-10
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , HWANG, Sung-Hyun , UM, Jung-Sun , KO, Gwangzeen , SONG, Myung-Sun , KIM, Chang-Joo
发明人： HWANG, Sung-Hyun , UM, Jung-Sun , KO, Gwangzeen , SONG, Myung-Sun , KIM, Chang-Joo
IPC分类号： H04B7/26
CPC分类号： H04W52/283 , H04L7/041 , H04W16/14 , H04W48/16 , H04W72/082
摘要： Provided are a network communication method and a network device using a preamble. According to the network communication method and the network device, network coexistence is easily achieved by using network identification transmitted in the preamble, and an unknown terminal, which has a low reception signal to noise ratio (SNR) and has not yet been connected to an existing network, is easily connected to the existing network.
摘要翻译：提供一种网络通信方法和使用前置码的网络设备。根据网络通信方式和网络设备，通过使用在前导码中发送的网络识别和具有低接收信噪比（SNR）并且尚未连接到前导码的未知终端容易地实现网络共存现有网络，轻松连接到现有网络。

10. 发明申请

WO2009072761A3 BEACON RE-BROADCASTING APPARATUS, BEACON RE-BROADCASTING METHOD, AND INITIAL ACCESS REQUEST METHOD IN WIRELESS NETWORK 审中-公开
公开(公告)号：WO2009072761A3
公开(公告)日：2009-06-11
申请号：PCT/KR2008/006805
申请日：2008-11-19
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , KO, Gwangzeen , SONG, Myung-Sun , HWANG, Sung-Hyun , UM, Jung-Sun , KIM, Chang-Joo , YOU, Sung-Jin
发明人： KO, Gwangzeen , SONG, Myung-Sun , HWANG, Sung-Hyun , UM, Jung-Sun , KIM, Chang-Joo , YOU, Sung-Jin
IPC分类号： H04L12/28
摘要： Provided are a beacon re-broadcasting apparatus, a beacon re-broadcasting method, and an initial access request method in a wireless network. In the re-broadcasting apparatus and method, a beacon frame including beacon information for communications in the wireless network and information on an echo beacon slot allocated for beacon re-broadcasting among time slots of a superframe is received from a management device for managing the wireless network in which a plurality of terminals communicated with each other through the superframe including time-divided time slots, and the beacon information is re-broadcasted during the echo beacon slot. Accordingly, the beacon information can be received in various environments, and the beacon information can be received to an adjacent network in addition to the corresponding network. Therefore, frequency resources can be shared and effectively used between networks, and convenience and efficiency in network operation can be maximized.

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