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公开(公告)号：KR1020090065248A
公开(公告)日：2009-06-22
申请号：KR1020070132726
申请日：2007-12-17
Applicant: 한국전자통신연구원
CPC classification number: H04W48/12 , H04W16/14 , H04W36/06 , H04W72/042 , H04W72/0446 , H04W72/0406 , H04W72/085
Abstract: A channel switching apparatus of a base station in a cognitive radio system and a method thereof and a channel switching apparatus and a method thereof are provided to reduce initialization time after channel switching, thereby improving reliability of a system. A channel switching message transmitter(110) transmits a channel switching message for switching to a backup channel. A backup channel beacon transmitter(120) transmits a beacon frame including allocation information of a slot inside a frequency channel. A backup channel communication unit(130) allocates a slot for data transceiving with each terminal inside the backup channel based on the allocation information.
Abstract translation: 提供认知无线电系统中的基站的信道切换装置及其方法以及信道切换装置及其方法，以减少信道切换后的初始化时间，从而提高系统的可靠性。 信道切换消息发送器（110）发送用于切换到备用信道的信道切换消息。 备用信道信标发射机（120）发送包括频道内的时隙分配信息的信标帧。 基于分配信息，备用信道通信单元（130）根据备用信道中的每个终端分配用于数据收发的时隙。
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公开(公告)号：KR1020090060956A
公开(公告)日：2009-06-15
申请号：KR1020080125125
申请日：2008-12-10
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04W52/283 , H04L7/041 , H04W16/14 , H04W48/16 , H04W72/082 , H04L27/2673 , H04L27/2692
Abstract: A network communication method and a network device using a preamble are provided to make a terminal with a low SNR(Signal-to-Noise Ratio) access a network and realize network sharing without communication between networks. A preamble detector(860) detects a preamble. An identification information extraction unit(870) extracts network identification information from the detected preamble. If a detection channel of the preamble is the same as the use channel of the device and a network corresponding to the identification information of the network is different from a network to which the device belongs, a controller(890) changes transmission power or cell design so that the networks are adjacently operated.
Abstract translation: 提供网络通信方法和使用前置码的网络设备，以使得具有低SNR（信噪比）的终端接入网络并实现网络共享，而不需要网络之间的通信。 前导码检测器（860）检测前导码。 识别信息提取单元（870）从检测到的前导码中提取网络识别信息。 如果前导码的检测信道与设备的使用信道相同，并且与网络的识别信息相对应的网络不同于设备所属的网络，则控制器（890）改变发射功率或小区设计 使网络相邻运行。
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163.发明公开
公开(公告)号：KR1020090060951A
公开(公告)日：2009-06-15
申请号：KR1020080124657
申请日：2008-12-09
Applicant: 한국전자통신연구원
IPC: H04L12/28
CPC classification number: H04W52/245 , H04W24/10 , H04W52/327 , H04W52/40 , H04W72/04
Abstract: A handshaking method, a transmission power determining method and an apparatus thereof for parallel transmission of multiple streams in a single radio channel are provided to support multi-stream parallel allocation in the single radio channel when the multiple streams to be allocated in a wireless communication system are sufficiently separated. A frame transceiver(701) transmits a power control frame to at least one receiving node and receives a response frame. The response frame comprises signal intensity measurement result measured when receiving the power control frame. A transmission power decision unit(703) determines stream transfer power based on the measurement result. The stream transfer power makes the receiving node belong to an interference range.
Abstract translation: 提供用于在单个无线电信道中并行传输多个流的握手方法，发送功率确定方法及其装置，以便当在无线通信系统中分配多个流时，在单个无线电信道中支持多流并行分配 充分分离。 帧收发器（701）将功率控制帧发送到至少一个接收节点并且接收响应帧。 响应帧包括在接收功率控制帧时测量的信号强度测量结果。 传输功率决定单元（703）基于测量结果确定流传输功率。 流传输功率使接收节点属于干扰范围。
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公开(公告)号：KR1020090060939A
公开(公告)日：2009-06-15
申请号：KR1020080117473
申请日：2008-11-25
Applicant: 한국전자통신연구원
IPC: H04L12/28
Abstract: A method of controlling multiple channels in a single network and a network management device are provided to share important data required for an operation by all devices in the network and control all devices by a function which controls the entire network. A channel manager(101) determines a new channel and a device(300) operating in the new channel. A management mode determiner(103) determines direct management of the new channel according to a master channel which is being communicated or a state of the new channel. A channel switching unit(107) switches between the master channel and the new channel in a new channel direct management mode.
Abstract translation: 提供了控制单个网络中的多个信道和网络管理设备的方法，以共享网络中所有设备进行操作所需的重要数据，并通过控制整个网络的功能来控制所有设备。 信道管理器（101）确定新信道和在新信道中操作的设备（300）。 管理模式确定器（103）根据正在传送的主信道或新信道的状态来确定新信道的直接管理。 信道切换单元（107）在新信道直接管理模式中在主信道和新信道之间切换。
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公开(公告)号：KR1020090020833A
公开(公告)日：2009-02-27
申请号：KR1020070085430
申请日：2007-08-24
Applicant: 한국전자통신연구원
Abstract: An apparatus for providing a bandwidth in a cognitive radio system and a method thereof are provided to increase the frequency use efficiency by extracting at least one fractional band, which is not timely/spatially used, from a part of a broadcast channel band, and then transmitting the extracted result to a terminal or base station. A local signal controller(117) calculates the oscillation frequency of a local signal which changes the center frequency of a fractional band as much as a predetermined size. The first local oscillators(102,106,109,113) output the first local signals corresponding to the calculated oscillation frequency. The first mixer moves the center frequency of the fractional band as much as a predetermined size by mixing the outputted first local signals with a signal of a broadcast channel band. The first band pass filters(104,108,111,115) filter the higher frequency band than the maximum value of a passing band to extract the first signal.
Abstract translation: 提供了一种用于在认知无线电系统中提供带宽的装置及其方法，用于通过从广播频道频带的一部分提取不及时/空间使用的至少一个小数段来增加频率使用效率，然后 将提取的结果发送到终端或基站。 本地信号控制器（117）计算将分数频带的中心频率改变为预定大小的本地信号的振荡频率。 第一本地振荡器（102,106,109,113）输出对应于所计算的振荡频率的第一本地信号。 第一混频器通过将输出的第一本地信号与广播信道频带的信号进行混合，将分数频带的中心频率移动到预定的大小。 第一带通滤波器（104,108,111,115）比通过频带的最大值滤波更高的频带以提取第一信号。
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Patent Agency Ranking
公开(公告)号：KR1020090016305A
公开(公告)日：2009-02-13
申请号：KR1020070080842
申请日：2007-08-10
Applicant: 한국전자통신연구원
IPC: H03D7/00
CPC classification number: H03D7/1441 , H03D7/1475 , H03D2200/0023
Abstract: A mixer for converting single signal into differential signal and a transceiver including the same are provided to improve LO(Local Oscillation) frequency removing property by using different local oscillation frequency in a transceiver. A LO differential signal generating part(21) converts an input LO signal into a differential signal. A first input is an LO differential signal. A second input is a first signal having a first frequency. A mixing part(22) differentially amplifies the LO differential signal and the first signal, and outputs a second signal of a second frequency by amplifying. The input LO signal has a frequency of LO or LO/2.
Abstract translation: 提供用于将单个信号转换成差分信号的混频器和包括其的收发器，以通过在收发器中使用不同的本地振荡频率来改善LO（本地振荡）频率去除特性。 LO差分信号产生部分（21）将输入的LO信号转换成差分信号。 第一输入是LO差分信号。 第二输入是具有第一频率的第一信号。 混合部分（22）对LO差分信号和第一信号进行差分放大，并通过放大来输出第二频率的第二信号。 输入LO信号具有LO或LO / 2的频率。
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167.发明授权
公开(公告)号：KR100861318B1
公开(公告)日：2008-10-01
申请号：KR1020070086075
申请日：2007-08-27
Applicant: 한국전자통신연구원 , 경희대학교 산학협력단
IPC: H03H21/00
CPC classification number: H03H21/00 , H03H17/02 , H03H17/0227 , H03H21/0012 , H03H21/0025
Abstract: An adaptive filter and method for detecting an optimum spectrum, and a spectrum detection apparatus using the same and a method thereof are provided to detect a spectrum by using an adaptive filter for reducing a noise under a time variable environment. An adaptive filter for detecting an optimum spectrum includes a data vector calculation unit(11), a coefficient vector calculation unit(12), an average calculation unit(13), and a convolutional calculation unit(14). The data vector calculation unit calculates a data vector of p-dimension from an input signal based on a degree of a predetermined adaptive filter. The coefficient vector calculation unit calculates a coefficient vector based on the data vector calculated by the data vector calculation unit. The average calculation unit calculates an average of the coefficient vector calculated by the coefficient vector calculation unit. The convolutional calculation unit calculates a convolution of the input signal and the average of the coefficient vector calculated by the average calculation unit.
Abstract translation: 提供了一种用于检测最佳频谱的自适应滤波器和方法，以及使用该频谱检测装置的频谱检测装置及其方法，用于通过使用用于在时间可变环境下降低噪声的自适应滤波器来检测频谱。 用于检测最佳频谱的自适应滤波器包括数据矢量计算单元（11），系数矢量计算单元（12），平均计算单元（13）和卷积计算单元（14）。 数据矢量计算单元基于预定的自适应滤波器的程度从输入信号计算p维的数据矢量。 系数向量计算单元基于由数据矢量计算单元计算的数据矢量来计算系数矢量。 平均计算单元计算由系数向量计算单元计算的系数向量的平均值。 卷积计算单元计算输入信号的卷积和由平均计算单元计算的系数矢量的平均值。
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公开(公告)号：KR1020080082891A
公开(公告)日：2008-09-12
申请号：KR1020070123638
申请日：2007-11-30
Applicant: 한국전자통신연구원
CPC classification number: H04L5/023 , H04L5/0039 , H04L5/0041 , H04L5/006
Abstract: A method and an apparatus for allocating a sub-channel in an OFDMA(Orthogonal Frequency Division Multiplexing Access) system are provided to improve usage efficiency of a frequency resource by allocating a diversity sub-channel and a band sub-channel on a frequency domain simultaneously. A method for allocating a sub-channel in an OFDMA system includes the steps of: dividing a total frequency band into a plurality of bands(S910), and allocating dispersed sub-carriers and adjacent sub-carriers to each of the bands by a predetermined ratio(S930); forming a diversity sub-channel having the dispersed sub-carriers, and a band sub-channel having the adjacent sub-carriers of at least one selected band of a plurality of bands(S950). The bands have one of the adjacent sub-carrier band, the dispersed sub-carrier band and a mixed band of the sub-carrier bands. The sub-carrier band has adjacent sub-carriers. The dispersed sub-carrier band has dispersed sub-carriers.
Abstract translation: 提供了一种用于在OFDMA（正交频分复用接入）系统中分配子信道的方法和装置，用于通过在频域上同时分配分集子信道和频带子信道来提高频率资源的使用效率 。 一种用于在OFDMA系统中分配子信道的方法包括以下步骤：将总频带划分成多个频带（S910），并将分散的子载波和相邻子载波分配给每个频带预定的 比（S930）; 形成具有分散子载波的分集子信道，以及具有多个带的至少一个选择频带的相邻子载波的频带子信道（S950）。 频带具有相邻子载波频带之一，分散的子载波频带和子载波频带的混合频带。 副载波频带具有相邻的子载波。 分散的副载波频带具有分散的副载波。
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公开(公告)号：KR100837696B1
公开(公告)日：2008-06-13
申请号：KR1020060074927
申请日：2006-08-08
Applicant: 한국전자통신연구원
IPC: H04B7/26
CPC classification number: H04L27/2614 , H04B17/24 , H04B17/318 , H04B17/364 , H04B17/382 , H04L1/0003 , H04W24/10 , H04W72/02 , H04W72/0453
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
본 발명은 단말기 수신성능을 이용한 채널 운영 방법 및 그에 따른 무선통신 시스템과 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체에 관한 것임.
2. 발명이 해결하려고 하는 기술적 과제
본 발명은 하나의 무선통신 시스템의 기지국에 2개 이상의 가용 주파수 채널들이 확보된다면, 단말기의 수신 데이터 1비트당 신호전력과 잡음전력의 비(Eb/No), 수신전력세기(RSSI : Received Signal Strength Indicator), 왕복전파지연(RTD : Round Trip Delay) 등의 성능등급에 의해 주파수 채널별로 서로 다른 변조방식을 할당하고, 동일한 성능등급의 단말기들에게 동일한 주파수 채널과 변조 방식을 적용하여 기지국 변조신호 PAPR(Peak to Average Power Ratio) 성능향상, 레인징 성능향상, 순방향 및 역방향 전력제어 성능을 향상시킬 수 있는, 단말기 수신성능을 이용한 채널 운영 방법 및 그에 따른 무선통신 시스템과 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체를 제공하는데 그 목적이 있음.
3. 발명의 해결방법의 요지
본 발명은 단말기 수신성능을 이용한 채널 운영 방법에 있어서, 각 단말기들의 수신성능을 측정하는 수신성능 측정단계; 상기 측정한 각 단말기의 수신성능에 따라 성능등급을 결정하는 단계; 및 상기 결정한 성능등급에 따라 상기 각 단말기에 할당할 주파수 채널 및 변조방식을 결정하는 주파수 채널 및 변조방식 결정단계를 포함함.
4. 발명의 중요한 용도
본 발명은 WRAN(Wireless Regional Area Network) 시스템 등에 이용됨.
WRAN, OFDMA, 적응변조, 다중 주파수 채널, RSSI, Eb/No, 주파수 할당-
公开(公告)号：KR1020080051435A
公开(公告)日：2008-06-11
申请号：KR1020060122474
申请日：2006-12-05
Applicant: 한국전자통신연구원
CPC classification number: H01Q9/0407 , H01Q9/0414 , H01Q13/08 , H01Q13/18
Abstract: An omni-directional planar antenna is provided to facilitate integration with an integrated circuit and implementation in a silicon semiconductor device. An omni-directional planar antenna includes a circular patch(102), a planar transmission line, a signal via, and a metal ground plane. The circular patch is located on any one of a plurality of dielectric substrates(101). The planar transmission line receives an external signal. The signal via connects the circular patch and the planar transmission line to feed the external signal received through the planar transmission line to the circular patch. The metal ground plane is located on the dielectric substrate and has a slot to pass the signal via.
Abstract translation: 提供全向平面天线以便于与硅半导体器件中的集成电路和实现的集成。 全向平面天线包括圆形贴片（102），平面传输线，信号通孔和金属接地平面。 圆形贴片位于多个电介质基板（101）中的任何一个上。 平面传输线接收外部信号。 信号通孔连接圆形贴片和平面传输线，以将通过平面传输线接收的外部信号馈送到圆形贴片。 金属接地层位于电介质基片上，并具有通过信号通孔的槽。
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