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公开(公告)号：KR100737341B1
公开(公告)日：2007-07-09
申请号：KR1020050119228
申请日：2005-12-08
Applicant: 한국전자통신연구원
CPC classification number: H04L69/40 , H04L43/00 , H04L43/0823 , H04L69/22
Abstract: Provided is a method for measuring performance of a multi-protocol label switching label switched path (MPLS LSP), using a fast failure detection (FFD) packet among MPLS operation and management (OAM) packets recommended by International Telecommunication Union-Telecommunication standardization sector (ITU-T) Y.1711 to detect a packet error generated in the MPLS LSP and newly defining bytes not used in the FFD frame to use the bytes for parity check. An ingress node performs the steps of: calculating a parity value of an MPLS packet as byte interleaved parity (BIP)-8 before transmitting the MPLS packet; storing the calculated parity value of the MPLS packet in an MPLS OAM packet of an FFD structure; and transmitting the MPLS OAM packet whenever transmitting the MPLS packet. And an egress node performs the steps of: calculating a parity value of a received MPLS packet; comparing a parity value of an MPLS packet stored in the MPLS OAM packet with the parity value of the received MPLS packet; and when the two parity values are not identical, determining that an error has occurred in the MPLS packet and discarding the MPLS packet.
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公开(公告)号：KR100696196B1
公开(公告)日：2007-03-20
申请号：KR1020050120300
申请日：2005-12-09
Applicant: 한국전자통신연구원
IPC: H04L12/24
CPC classification number: H04L12/2856
Abstract: A maintenance signal propagating method in a VPWS(Virtual Private Wire Service) network using an SDH/SONET(Synchronous Digital Hierarchy/Synchronous Optical Network) is provided to allow each hierarchical maintenance signal to systematically interwork with each other when a physical defect is generated, thereby expanding a network maintenance function up to an MPLS(Multi Protocol Label Switching) network and an Ethernet layer. An ingress node(101) transmits Ethernet MAC(Media Access Control) signals(104,105) of subscriber devices(CE1,CE2) to a VPWS-VC(Virtual Circuit)(106) and a VPWS-tunnel(107), and connects the VPWS-tunnel(107) to the first SDH-VC(108). A transit node(102) extracts the VPWS-tunnel(107) from the first SDH-VC(108), and performs a label swapping function to generate an FDI(Forward Defect Indication) signal which is a maintenance signal of an MPLS layer as an AIS(Alarm Indication Signal) and an RDI(Remote Defect Indication) signal, then transmits the AIS and the RDI signal to the second SDH-VC(109). An egress node(103) performs a backward process of the ingress node(101), and delivers the AIS and FDI signal delivered from the transit node(102) to the ingress node(101).
Abstract translation: 提供了使用SDH / SONET（同步数字体系/同步光网络）的VPWS（虚拟专线服务）网络中的维护信号传播方法，以便在产生物理缺陷时允许每个分层维护信号彼此系统地互相交互工作， 从而将网络维护功能扩展到MPLS（多协议标签交换）网络和以太网层。 入口节点（101）将用户设备（CE1，CE2）的以太网MAC（媒体访问控制）信号（104,105）发送到VPWS-VC（虚拟电路）（106）和VPWS隧道（107），并将 VPWS隧道（107）到第一SDH-VC（108）。 传输节点（102）从第一SDH-VC（108）提取VPWS隧道（107），并执行标签交换功能，以生成作为MPLS层的维护信号的FDI（正向缺陷指示）信号 AIS（报警指示信号）和RDI（远程缺陷指示）信号，然后将AIS和RDI信号发送到第二SDH-VC（109）。 出口节点（103）执行入节点（101）的后向处理，并将从传输节点（102）传送的AIS和FDI信号传送到入节点（101）。
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公开(公告)号：KR1020040055290A
公开(公告)日：2004-06-26
申请号：KR1020020081929
申请日：2002-12-20
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/2581
CPC classification number: H04B10/0793 , H04B2210/071 , H04J14/02
Abstract: PURPOSE: A maintenance apparatus of an optical transmission system and a method therefor are provided to perform maintenance function in an optical channel section layer, optical multi-section layer and optical transmission section layer. CONSTITUTION: An OCH(Optical CHannel) layer(13) transfers a tributary signal inputted from a tributary signal processor to multiple channels according to each wavelength. An OMS(Optical Multiplex Section) layer(12) multiplexes an optical signal of several wavelengths. An OTS(Optical Transmission Section) layer(11) transmits multiplexed light to a relay WDM(Wavelength-Division Multiplexing) system(20) through one optical fiber. An end office maintenance signal processor(14) monitors a trouble generated from an optical fiber of each layer or between layers. A relay optical transmission section layer(21) amplifies an optical signal received from the OTS layer(11) and transmits it to network. A relay maintenance signal processor(22) monitors a trouble generated from an optical fiber of the relay transmission section layer(21) or between the OTS layer(11) and the relay transmission section layer(21).
Abstract translation: 目的：提供一种光传输系统的维护装置及其方法，用于在光通道部分层，光多段层和光传输部分层中执行维护功能。 构成：根据每个波长，OCH（光通道）层（13）将从支路信号处理器输入的支路信号传送到多个通道。 OMS（光复用部分）层（12）复用几个波长的光信号。 OTS（光传输部）层11通过一根光纤将多路复用光发射到中继WDM（波分复用）系统（20）。 终端维护信号处理器（14）监视从每个层的光纤或层之间产生的故障。 中继光传输部分层（21）放大从OTS层（11）接收的光信号并将其发送到网络。 继电器维护信号处理器（22）监视从中继传输部分层（21）的光纤或OTS层（11）和中继传输部分层（21）产生的故障。
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公开(公告)号：KR1020030094844A
公开(公告)日：2003-12-18
申请号：KR1020020032171
申请日：2002-06-08
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/03 , H04B10/2581
CPC classification number: H04J14/0272 , H04B10/03 , H04B10/29 , H04B10/503 , H04B10/60 , H04B2210/071
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）系统和报警发生抑制和激光切断方法，以通过使用维护信号来切断位于具有故障的光中继器中的光放大器的激光，从而抑制不必要的报警 产生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有故障。 当从信道检测到故障时，维护信号插入器（2372）将维护信号插入到下部光链路设备和上部光学链路设备中。 维护信号检测器（2382）检测来自上部或下部光学链路装置的维护信号。 响应于检测到的维护信号，报警抑制器（2386）使下部光链路设备中产生的故障报警失效。 激光截止单元（2376）响应于维护信号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。
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公开(公告)号：KR1020000032120A
公开(公告)日：2000-06-05
申请号：KR1019980048483
申请日：1998-11-12
IPC: H04L7/00
Abstract: PURPOSE: A device and a method for a synchronous clock signal are provided to abbreviate excess frequency deviation and restore the abbreviated information. CONSTITUTION: A first click receiver(301) and a second click receive(302) abstract synchronous clock signal from DS1E(Digital Signal Level-1Europe) and transmit the clock signal to a first and a second DP-PLL(Digital Processing-Phase Locked Loop)(306,311). The first and the second DP-PLL(306,311) detect the phase difference of the synchronous clock signals between the first and the second reference clock signal and a first and a second voltage control oscillator(310, 315). A clock defect detector(302,304) probes LOS(Loss of Signal), LOF(Loss of Frame), AIS(Alarm Indication Signal) or excess error and sends the result to a process(305). A phase error detector(307,312) generates the phase error by comparing the first and the second reference clock signal and synchronous clock signal of the voltage control oscillator(310,315). A low pass filter(309,314) filtrates and analyses the phase error and calculates frequency deviation. If the frequency deviation is satisfied a stipulation value, the deviation value generates voltage control value through D/A(Digital/Analogue) converter. If the frequency deviation defect is occurred, the defect is offered to the processor(305). The processor orders 2: 1 clock selector(316) to choose normal synchronous clock and the 2: 1 clock selector generates a synchronous clock signal.
Abstract translation: 目的：提供用于同步时钟信号的装置和方法，用于缩写多余的频率偏差并恢复缩写信息。 构成：来自DS1E（Digital Signal Level-1Europe）的第一次点击接收机（301）和第二次点击接收（302）抽象同步时钟信号，并将时钟信号发送到第一和第二DP-PLL（数字处理锁相 环）（306311）。 第一和第二DP-PLL（306,311）检测第一和第二参考时钟信号之间的同步时钟信号的相位差以及第一和第二压控振荡器（310,315）。 时钟缺陷检测器（302,304）探测LOS（丢失信号），LOF（丢帧），AIS（报警指示信号）或超出错误，并将结果发送到处理（305）。 相位误差检测器（307,312）通过比较压控振荡器（310,315）的第一和第二参考时钟信号和同步时钟信号来产生相位误差。 低通滤波器（309,314）对相位误差进行滤波和分析，并计算频偏。 如果频率偏差满足规定值，则偏差值通过D / A（数字/模拟）转换器产生电压控制值。 如果发生频率偏差缺陷，则向处理器（305）提供缺陷。 处理器命令2：1时钟选择器（316）选择正常同步时钟，2：1时钟选择器产生同步时钟信号。
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Patent Agency Ranking
公开(公告)号：KR1019980036224A
公开(公告)日：1998-08-05
申请号：KR1019960054744
申请日：1996-11-16
IPC: H04B7/155
Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
대국장애표시신호를 이용한 1+1 양방향 선로절체 제어방법.
2. 발명이 해결하려고 하는 기술적 과제
주 신호의 전송속도와 동일한 대국장애표시신호를 이용하여 운용 구간의 어느 한쪽 수신단에서 장애가 검출되면 대국장애표시신호를 반대 방향 링크를 통해 송신단으로 전송함으로써, 양단국의 수신단을 동시에 예비 구간으로 절체되도록 하고자 함.
3. 발명의 해결방법의 요지
운용 구간의 어느 한 수신단에서 장애가 검출되면 반대 방향 링크를 통해 대국장애표시신호를 삽입하여 송신한 후, 자신의 선택기를 제어하여 예비 구간으로 선로를 절체시키는 제 1 단계; 및 상기 제 1 단계 수행 후, 반대 방향 링크를 통해 대국장애표시신호를 검출하면 자신의 선택기를 제어하여 예비 구간으로 선로를 절체하는 제 2 단계를 포함하여 이루어짐.
4. 발명의 중요한 용도
장거리 전송 시스템에 이용됨.-
公开(公告)号：KR1019980030119A
公开(公告)日：1998-07-25
申请号：KR1019960049491
申请日：1996-10-29
IPC: H04B7/26
Abstract: 본 발명은 1+1 양방향 절체 제어 방법에 관한 것으로서, 장애를 검출하는 제 1 단계와, 상기 장애를 검출한 국에서 자신의 선택기를 제어하여 구간을 변경하는 제 2 단계와, 상대국으로 선택기 제어 신호를 보내는 제 3 단계와, 상기 선택기 제어 신호를 받은 상대국이 수신된 제어 신호에 따라 수신단을 선택하는 제 4 단계와, 상기 선택기 제어 신호를 받은 상대국이 장애 검출국으로 응답 신호를 송신하는 제 5 단계로 이루어져, 빠른 절체시간을 요하는 시스템, 즉 해저 광 케이블 시스템이나 위성통신 시스팀 등과 같이 초 장거리 시스템에서 절체처리 시간 지연으로 인한 정보의 손실을 방지할 수 있다.
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公开(公告)号：KR100129608B1
公开(公告)日：1998-04-14
申请号：KR1019940035749
申请日：1994-12-21
IPC: H04L12/00
CPC classification number: H04J3/08 , H04J2203/006
Abstract: A add-drop control apparatus where enables to adapt the system depending on the network construct of the transmission line and maintains the survivability of the system in accordance with the flexibility, reliability and self-healing because of enabling the line switch and the lop back, even if the interference of the line is generated. The said apparatus consist of a data input means(3,9), a frame phase arrangement means(7), a add data control means(6), a drop data control means(5), a output control means(2,18), a processor interface means(4) and an alarm interface signal insert controller.
Abstract translation: 一种分插控制装置，其能够根据传输线的网络结构来适应系统，并且由于使线路开关和波形恢复而根据灵活性，可靠性和自愈性维持系统的生存性， 即使产生线路的干扰。 所述装置包括数据输入装置（3,9），帧相位装置（7），加法数据控制装置（6），丢弃数据控制装置（5），输出控制装置 ），处理器接口装置（4）和报警接口信号插入控制器。
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公开(公告)号：KR1020170045110A
公开(公告)日：2017-04-26
申请号：KR1020160124603
申请日：2016-09-28
Applicant: 한국전자통신연구원
IPC: H04L12/939 , H04L12/703
Abstract: 본발명은선형보호절체도메인연결방법으로, 워킹상호연결노드가워킹경로 i, 워킹경로 i+1 및쌍을이루는보호상호연결노드와연결된연결경로 i의장애유무를감시하여그 결과를상기보호상호연결노드에전송하는단계와, 상기보호상호연결노드가상기연결경로 i, 보호경로 i 및보호경로 i+1의장애유무를감시하고, 워킹경로 i 및워킹경로 i+1의장애유무정보와보호경로 i 및보호경로 i+1의장애유무정보를근거로사용자트래픽송수신경로를결정하고, 사용자트래픽송수신경로정보및 보호경로의장애유무정보에따라워킹경로제어정보및 보호경로제어정보를생성하고, 상기워킹경로제어정보를상기워킹상호연결노드에전송하는단계와, 상기보호상호연결노드가상기보호경로제어정보에따라보호경로 i, 보호경로 i+1 및연결경로 i 중두 개의경로만을연결하는단계를포함한다.
Abstract translation: 本发明涉及一种线性保护切换域连接方法，其中工作互连节点监视连接到工作路径i，工作路径i + 1和一对保护互连节点的连接路径i的存在或不存在， （I + 1），保护路径i和保护路径i + 1的保护路径i + 1和保护路径i + 1， i和保护路径i + 1，根据用户业务发送/接收路径信息和保护路径的失效/不存在信息生成工作路径控制信息和保护路径控制信息， 将工作路径控制信息发送给工作互联节点，并根据保护路径控制信息将保护互联节点仅连接到保护路径i，保护路径i + 1和连接路径i 包容 的。
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