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公开(公告)号：KR100491975B1
公开(公告)日：2005-05-27
申请号：KR1020020065175
申请日：2002-10-24
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/077
CPC classification number: G02B6/359 , G02B6/3512 , G02B6/3546 , H04Q11/0005 , H04Q2011/0015 , H04Q2011/0024 , H04Q2011/003 , H04Q2011/0039 , H04Q2011/0083
Abstract: 본 발명은 광 스위치의 오동작을 감시하기 위한 방법 및 장치에 관한 것으로, 구체적으로는 광 스위치의 출력포트에서 감시광의 출력변화를 감지하여 광 스위치의 오동작 발생여부를 판단하는 방법 및 장치에 관한 것이다. 본 발명의 광 스위치 오동작 발생여부 판단장치는 전송될 데이터가 실려있는 신호광과 다른 파장을 가진 감시광을 생성하는 감시 광원 생성부; 감시광을 전송될 데이터가 실려있는 신호광과 광학적으로 합파하여 광 스위치로 입력하는 합파수단; 광 스위치에서 출력되는 출력 광신호에서 감시광을 분파하는 분파수단; 분파된 감시광의 출력변화를 검출하는 복수의 광 검출 및 출력변화 감지부; 및 외부로부터 광 스위치 설정정보를 입력받아 상기 검출된 감시광의 출력변화와 비교하여 그 일치여부에 따라서 광 스위치의 오동작 여부를 판단하는 오동작 여부 판단부로 구성된다. 본 발명의 광 스위치 오동작 발생여부 판단장치는 전송 품질에 아무런 영향을 미치지 않으면서도 광 스위치를 감시할 수 있는 효과가 있으며, 부가적으로 필요한 광 모듈이나 전자회로가 간단하여 시스템에 실제로 쉽게 적용할 수 있는 장점이 있다.
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公开(公告)号：KR100467319B1
公开(公告)日：2005-01-24
申请号：KR1020020032171
申请日：2002-06-08
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/03 , H04B10/2581
Abstract: PURPOSE: A WDM(Wavelength Division Multiplexing) system and an alarm generation suppressing and laser cut off method therefor are provided to cut off a laser of an optical amplifier located in an optical repeater having a failure by using a maintenance signal, thereby suppressing unnecessary alarm generation and cutting off an unnecessary laser operation. CONSTITUTION: A failure detector(2371) detects whether each optical signal receiving channel has a failure. A maintenance signal inserter(2372) inserts a maintenance signal into a lower optical link device and an upper optical link device when a failure is detected from the channels. A maintenance signal detector(2382) detects the maintenance signal from the upper or the lower optical link device. An alarm suppresser(2386) inactivates a failure alarm generated in the lower optical link device in response to the detected maintenance signal. A laser cut off unit(2376) cuts off a laser of an optical amplifier connected to a front end of the optical link device where the failure is detected, in response to the maintenance signal.
Abstract translation: 目的：提供WDM（波分复用）系统及其报警产生抑制和激光切断方法，以通过使用维护信号切断位于具有故障的光中继器中的光放大器的激光器，由此抑制不必要的报警 生成并切断不必要的激光操作。 构成：故障检测器（2371）检测每个光信号接收通道是否发生故障。 当从通道检测到故障时，维护信号插入器（2372）将维护信号插入下光链路装置和上光链路装置。 维护信号检测器（2382）检测来自上级或下级光链路设备的维护信号。 告警抑制器（2386）响应于检测到的维护信号而使在下光链路设备中生成的故障告警失活。 响应于维护信号，激光切断单元（2376）切断连接到检测到故障的光链路装置的前端的光放大器的激光器。
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公开(公告)号：KR1020030048830A
公开(公告)日：2003-06-25
申请号：KR1020010078869
申请日：2001-12-13
Applicant: 한국전자통신연구원
IPC: H04Q11/00
CPC classification number: H04Q11/0005 , H04Q2011/0075
Abstract: PURPOSE: A multidimensional OXC(Optical Cross Connect) switching system is provided to symmetrically arrange two cross connect switches, and to locate insertion/extract switches between the two switches, thereby easily receiving a link change of an optical transport network. CONSTITUTION: An optical fiber layer switching unit(310) performs a cross connect switching for an I/O optical fiber, extracts a portion of the fiber to an upper layer, and inserts an optical fiber of the upper layer. An optical wave band layer switching unit(330) performs a cross connect switching for an I/O optical wave band, obtains an optical wave band by converting the extracted optical fiber, extracts a portion of the optical wave band to the upper layer, inserts an optical wave of the upper layer, multiplexes a portion of the optical wave band to an optical fiber, and transmits the fiber to a lower layer. An optical wave layer switching unit(350) performs a cross connect switching for an I/O optical wave, obtains an optical wave, extracts a portion of the optical wave and the input optical wave to a local network(360), inserts an optical wave of the local network(360), and converts a portion of the optical wave to transmit the wave to the lower layer. The first interstage connector(320) performs an interfacing for insertion/extraction between the switching unit(310) and the switching unit(330). The second interstage connector(340) performs an interfacing for insertion/extraction between the switching unit(330) and the switching unit(350).
Abstract translation: 目的：提供多维OXC（光交叉连接）交换系统，以对称布置两个交叉连接交换机，并且在两个交换机之间定位插入/提取交换机，从而容易地接收光传输网络的链路变化。 构成：光纤层交换单元（310）对I / O光纤进行交叉连接切换，将一部分纤维提取到上层，并插入上层的光纤。 光波段层交换单元（330）对I / O光波段进行交叉连接切换，通过转换所提取的光纤获得光波段，将一部分光波段提取到上层，插入 上层的光波将光波段的一部分复用到光纤，并将光纤传输到下层。 光波层切换单元（350）对I / O光波进行交叉连接切换，得到光波，将一部分光波和输入光波提取到局域网（360），插入光 本地网络的波（360），并且转换光波的一部分以将波发送到下层。 第一级间连接器（320）执行用于在切换单元（310）和切换单元（330）之间插入/取出的接口。 第二级间连接器（340）执行用于在切换单元（330）和切换单元（350）之间插入/取出的接口。
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公开(公告)号：KR100341394B1
公开(公告)日：2002-06-22
申请号：KR1019990054899
申请日：1999-12-03
Applicant: 한국전자통신연구원
IPC: H04Q1/30
CPC classification number: H04Q11/0005 , H04J14/08 , H04Q2011/0041
Abstract: 본발명은새로운구도의광학적광 패킷헤더처리기술에관한것이다. 광패킷헤더는시간에따라배열된두 개이상의광 펄스로구성되며이들사이의시간간격을조절하는방법으로목적지주소등의정보를입력한다. 이러한정보의판독을위하여각각의시간지연선을특정한시간간격들로조정하여놓은광 펄스간특정시간간격검출기를하나혹은그 이상이용하여, 배치하여놓은광 신호열에대하여이러한특정한시간간격들이이 광신호열의광 펄스사이에존재하는지여부를알아내는구도를사용하여광 패킷헤더를구성하고이를검출하는것이다. 이방법은헤더를광학적으로처리하여빠르고도일정한처리시간이보장되며구현이손쉬우면서도많은수의주소(address)확보가가능한등 기존에제안된기술들보다나은기능을갖추고있다.
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公开(公告)号：KR1020010047173A
公开(公告)日：2001-06-15
申请号：KR1019990051270
申请日：1999-11-18
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/2581
CPC classification number: H04B10/071 , H04B10/07953 , H04B10/07957 , H04B10/2519 , H04J14/02
Abstract: PURPOSE: An apparatus for checking a WDM optical signal is provided to measure a channel-based wavelength and power and an average optical signal noise ratio(OSNR) of a wavelength division multiplexing(WDM) at the same time. CONSTITUTION: An apparatus for checking a WDM optical signal performance includes an optical splitter(20), a 1xN optical coupler(30), an optical fiber bragg grating(40), an optical detector, an amplifier(60), an analog/digital converter and a signal processor(80). A WDM signal(11) is formed of optical wavelengths(λ1, λ2, ..., λn-1) and is obtained based on a tapping from an optical transmission path. The WDM signal separated from the optical transmission path is inputted into an input port(21) of the optical splitter(20) and is inputted into the input port(31) of the 1xN coupler(30) through an output port(22). The optical splitter prevents the optical signals reflected by the optical fiber bragg grating from being coupled to the optical transmission path. The 1xN optical coupler(30) distributes the WDM signals to each output port(32-0, 32-1, ..., 32-n-1) based on a certain insertion loss.
Abstract translation: 目的：提供一种用于检查WDM光信号的装置，用于同时测量波分复用（WDM）的基于信道的波长和功率以及平均光信号噪声比（OSNR）。 构成：用于检查WDM光信号性能的装置包括光分路器（20），1xN光耦合器（30），光纤布拉格光栅（40），光检测器，放大器（60），模数/数字 转换器和信号处理器（80）。 WDM信号（11）由光波长（λ1，λ2，...，λn-1）形成，并且基于来自光传输路径的抽头获得。 从光传输路径分离的WDM信号被输入到光分路器（20）的输入端口（21），并通过输出端口（22）输入到1xN耦合器（30）的输入端口（31）。 光分路器防止由光纤布拉格光栅反射的光信号耦合到光传输路径。 1xN光耦合器（30）基于一定的插入损耗将WDM信号分配给每个输出端口（32-0,32-1，...，32-n-1）。
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Patent Agency Ranking
公开(公告)号：KR100288550B1
公开(公告)日：2001-05-02
申请号：KR1019970069665
申请日：1997-12-17
Applicant: 한국전자통신연구원
IPC: G02B26/00
Abstract: PURPOSE: An optical signal arranging apparatus is provided to adjust a progressing velocity of an optical signal and an arrival time of the optical signal with any time interval, by forcing strong light pumping to the optical signal when the optical signal progresses through a waveguide. CONSTITUTION: A sampling part(210) has the first and second samplers(211, 212) for sampling optical signal from the exterior by an optical signal packet, respectively. The first delay part(220) has the first delay(221) for delaying an optical signal from the first sampler(211) so as to be overlapped with an optical pump, whose strength is adjusted properly, and the second delay(222) for delaying an optical signal from the second sampler(212) so as to be overlapped with the optical pump. A control part(230) receives an optical signal from the sampling part(210), calculates a time for correcting an arrival time error of optical signals transferred through waveguides(A, B), and controls an attenuation part(250) according to a calculation result. An optical pump generating part(240) oscillates optical pump with a constant strength, and attenuates the strength of the oscillated optical pump so as to correspond to the strength necessary for the attenuation part(250). The attenuation part(250) has the first and second attenuators(251, 252) for attenuating an optical pump from the generating part(240) according to a control signal of the control part. A mixing part(260) has the first mixer(261) for mixing optical signals from the first delay(221) and the first attenuator(251), and the second mixer(262) for mixing optical signals from the second delay(222) and the second attenuator(252). A filtering part(280) has the first filter(281) for removing an optical pump from an output signal of the third delay(271) and outputting an optical signal, and the second filter(282) for removing an optical pump from an output signal of the fourth delay(272) and outputting an optical signal.
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公开(公告)号：KR100264533B1
公开(公告)日：2000-09-01
申请号：KR1019970069666
申请日：1997-12-17
Applicant: 한국전자통신연구원
IPC: G02F1/00
CPC classification number: H04B10/299
Abstract: PURPOSE: An apparatus for enhancing an extinction ratio in an optical NRZ(non-return to zero)-to-RZ conversion system and an optical modulation system therefor are to enhance the extinction ratio by using an optical loop mirror together with an optical amplifier. CONSTITUTION: A variable coupling unit(30) receives external optical signals and splits them to respective terminals of a loop mirror with a predetermined coupling ratio. A variable optical delaying unit(31) delays phases of the optical signals split by the variable coupling unit. An optical amplification unit(32) amplifies an optical intensity and varies a refractive index. The optical amplification unit is positioned asymmetrically so as to cause a phase delay of a counterclockwise pulse with respect to a clockwise pulse. The phase delay is smaller than a bit time of an RZ signal pattern inputted slightly departed from a center of the loop mirror. A polarization adjusting unit(33) adjusts a polarization of optical signals splitted by the variable coupling unit. An optical band pass filter(34) removes noises from signals output from the loop mirror.
Abstract translation: 目的：一种用于增强光学NRZ（不归零）至RZ转换系统中的消光比的装置及其光调制系统，通过与光放大器一起使用光环路镜来增强消光比。 构成：可变耦合单元（30）接收外部光信号，并以预定的耦合比将它们分离到环形反射镜的各个端子。 可变光延迟单元（31）延迟由可变耦合单元分割的光信号的相位。 光放大单元（32）放大光强度并改变折射率。 光放大单元被非对称地定位成相对于顺时针脉冲引起逆时针脉冲的相位延迟。 相位延迟小于从环形镜的中心稍微偏离的RZ信号图案的位时间。 偏振调节单元（33）调节由可变耦合单元分离的光信号的偏振。 光学带通滤波器（34）从环形反射镜输出的信号中去除噪声。
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公开(公告)号：KR1020000032613A
公开(公告)日：2000-06-15
申请号：KR1019980049118
申请日：1998-11-16
Abstract: PURPOSE: A method for processing multimedia call in cellular system with hierarchical structure is provided to offer an excellent quality of a service by assigning a cell layer and a channel according to a velocity of a mobile station and a kind of call. CONSTITUTION: A call is received to a base station and a channel assignment is requested(501). The call is temporarily stored in an infinite buffer when the call is an audio mail or a paging(503). It is judged as to whether a channel remained in the base station is existed(504). A channel is assigned when the channel remained in the base station is existed(505). It is judged as to whether a channel remained in the base station is existed when the call is not the audio mail or the paging(506). It is judged as to whether the call is a new audio call or a new data call to be sensitive to a delay when the channel remained in the base station is not existed(507). The call is closed when the call is the new audio call or the new data call to be sensitive to a delay(508). It is judged as to whether the call is a hand-off audio signal(509). It is judged as to whether a storing space remained in a limited buffer is existed when the call is the hand-off audio signal(510). The hand-off data call is stored in the limited buffer when the storing space remained in the limited buffer is existed(511).
Abstract translation: 目的：提供一种在分层结构的蜂窝系统中处理多媒体呼叫的方法，通过根据移动台的速度和一种呼叫分配小区层和信道来提供优质的业务。 构成：向基站接收呼叫，并请求频道分配（501）。 当呼叫是音频邮件或寻呼（503）时，呼叫暂时存储在无限缓冲区中。 判断是否存在基站中的信道是否存在（504）。 当信道保留在基站中时，分配信道（505）。 当呼叫不是音频邮件或寻呼（506）时，判断是否存在基站中的信道是否存在。 当不存在基站中的信道时，判断该呼叫是新的音频呼叫还是新的数据呼叫对延迟敏感（507）。 当呼叫是新的音频呼叫或新的数据呼叫对延迟敏感时，呼叫被关闭（508）。 判断呼叫是否是越区切换音频信号（509）。 当呼叫是越区切换音频信号（510）时，判断是否存在在有限缓冲器中的存储空间。 当存在有限缓冲器中的存储空间时，越区切换数据呼叫被存储在有限缓冲器中（511）。
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公开(公告)号：KR100198936B1
公开(公告)日：1999-06-15
申请号：KR1019960055818
申请日：1996-11-20
Applicant: 한국전자통신연구원
IPC: H04B10/00
CPC classification number: H04Q11/0003 , H04Q11/0005 , H04Q2011/0035
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
자체광전효과소자를 이용한 다단구조의 광 패킷 스위칭장치.
2. 발명이 해결하려고 하는 기술적 과제
대칭형 자체광전효과소자 다수개를 이용하여 다단 구조로 형성함으로써, 입력된 광신호를 자기 복제 및 증폭한 후, 광 패킷의 헤더 부분에 대한 제어를 통해 자체 라우팅이 이루어지도록 하고자 함.
3. 발명의 해결방법의 요지
다수개의 대칭형 자체광전효과소자를 이용한 광 패킷 스위칭장치에 있어서,제1 및 제2 대칭형 자체광전효과소자를 상호 연결하여 전단부를 구성하고, 제3 및 제4 대칭형 자체광전효과소자를 상호 연결하여 후단부를 구성하며, 상기 전단부와 후단부를 포함하는 단위 스위칭모듈들을 상호 연결하여 1xN의 다단 구조로 형성하여 전단부는 자기복제 및 증폭을 수행하고, 후단부는 스위칭 동작을 수행하도록 함.
4. 발명의 중요한 용도
광 교환 분야에 이용됨.-
公开(公告)号：KR100170477B1
公开(公告)日：1999-05-01
申请号：KR1019950052644
申请日：1995-12-20
Applicant: 한국전자통신연구원
IPC: G02B26/00
CPC classification number: B82Y20/00 , G02F1/017 , G02F2201/346
Abstract: 본 발명은 두 개의 다른 파장 소자를 집적시켜 논리, 스위칭, 파장 변환 등의 역할이 가능한 광 소자에 관한 것으로, 제1도전형으로 도우핑된 반도체 기판(1)위에 상기 기판(1)에 대해 투명한 파장에서 동작하는 광 소자로서 제1도전형전극(2)과 광학적 활성층의 다중양자 우물구조층(3) 및 제2도전형전극(4)이 순차적으로 순차적으로 형성되는 제1광소자 구조를 구비하고, 상기 제1광소자 구조위에 상기 제1광소자 구조에서 사용되는 제1파장과 또 자른 제2파장에서 동시에 고반사율을 갖는 거울 구조(5)를 구비하며, 상기 거울 구조(5)위에 상기 제2파장에서 동작하는 제2도전형전극(6)과 광학적 활성층의 다중양자 우물구조층(7) 및 제2도전형 반도체 전극층(8)이 순차적으로 형성되는 제2광소자 구조를 구비하고, 상기 제1도전형 기반(1)과 제2도전형전극(6)에 대� �� 오믹전극(9)과, 상기 제2도전형전극(4)과 제2도전형 반도체 전극층(8)에 대한 오믹전극(10)과, 상기 제2광소자 구조에 대한 무반사막(11)과, 상기 제1광소자 구조에 대한 무반사막(12)이 구비되고 상기 제2도전형전극(4)과 제2도전형전극(6)을 연결하는 금속으로 구성되는이중 파장 DBR을 이용한 수직 구조형의 광변조기에 관한 것이다.
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