JP2011055381A - Fault monitoring control system - Google Patents

Fault monitoring control system Download PDF

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JP2011055381A
JP2011055381A JP2009204230A JP2009204230A JP2011055381A JP 2011055381 A JP2011055381 A JP 2011055381A JP 2009204230 A JP2009204230 A JP 2009204230A JP 2009204230 A JP2009204230 A JP 2009204230A JP 2011055381 A JP2011055381 A JP 2011055381A
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link disconnection
transmission device
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JP5107981B2 (en
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Koichi Igarashi
公一 五十嵐
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Fujitsu Telecom Networks Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fault monitoring control system for collecting the status information of transmission devices and transmission lines, the fault monitoring control system achieved in the quick detection of a spot where a link disconnection fault occurs. <P>SOLUTION: The fault monitoring control system collects the contact information of a transmission system by a monitoring device, the transmission system performing data transmission by sequentially connecting the plurality of transmission devices 3-8 via the transmission lines. The transmission device sends remote link disconnection information to a next-stage transmission device when detecting the occurrence of link disconnection with a pre-stage transmission device, performs link shut-down processing on the next-stage transmission device when receiving the remote link disconnection information from the pre-stage transmission device, sends link disconnection detection contact information to the monitoring device when detecting the occurrence of link disconnection from the pre-stage transmission device, and sends the remote link disconnection contact information to the monitoring device when receiving the remote link disconnection information from the pre-stage transmission device. The monitoring device collects contact information from the respective transmission devices, and when two transmission devices which have sent the link disconnection detection contact information are present between transmission devices which have sent remote link disconnection contact information, the monitoring device determines the occurrence of link disconnection between the two transmission devices. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、複数の伝送装置を伝送路により順次接続して、データを多段中継伝送する伝送システムに於けるリンク断等の障害情報を収集し、障害発生個所の特定を可能とする障害監視制御システムに関する。   The present invention collects failure information such as link breakage in a transmission system in which a plurality of transmission devices are sequentially connected by a transmission line and transmits data in a multistage relay transmission, and enables failure monitoring control to identify a failure occurrence location. About the system.

複数の伝送装置を伝送路により接続してデータ等を伝送する伝送システムに於いて、伝送装置間のリンク断障害が発生した場合、このリンク断障害発生個所を介して受信する予定の伝送装置は、クライアントロス検出等によりリンク断発生を検出すると、送信側の伝送装置に対してリンク断とすることにより、リンク断障害発生を通知するリンクパススルー機能を適用した制御構成が知られている。又複数の伝送装置を順次接続した伝送システムに於いても、リンクパススルー機能を適用して、リンク断障害発生を順次通知することができる。又複数の伝送装置のそれぞれの状態情報を監視装置により収集して、障害発生か否かを監視する監視システムが知られている。例えば、図４に示すように、ルータ１００，１０１間を、複数の伝送装置（ＷＤＭ−Ａ，ＷＤＭ−Ｂ）１０３〜１０８を配置して、順次伝送路により接続した伝送システムに於いて、Ａ局をルータ１０１と伝送装置（ＷＤＭ−Ａ）１０３、Ｂ局を伝送装置（ＷＤＭ−Ｂ）１０４，（ＷＤＭ−Ａ）１０５、Ｃ局を伝送装置（ＷＤＭ−Ｂ）１０６，（ＷＤＭ−Ａ）１０７、Ｄ局を伝送装置（ＷＤＭ−Ｂ）１０８とルータ１０２とによりそれぞれ構成し、監視装置２００により、各伝送装置１０３〜１０８のリンク断検出情報を含む各種の状態監視情報を直接的又は各種の図示を省略したネットワークを介して収集し、各部の状態監視を行う障害監視制御システムが知られている。この場合の各伝送装置１０３〜１０８は、ＷＤＭ（Ｗａｖｅｌｅｎｇｔｈ Ｄｉｖｉｓｉｏｎ Ｍｕｌｔｉｐｌｅｘｉｎｇ）を適用してデータ伝送し、局間では単一光伝送路により双方向の光波長多重化伝送を行い、局内では２本の光伝送路によりそれぞれ一方向の光波長多重伝送を行う構成の場合を示す。   In a transmission system in which a plurality of transmission devices are connected by a transmission line to transmit data and the like, when a link break failure occurs between the transmission devices, the transmission device scheduled to receive via the link break failure occurrence location is When a link loss occurrence is detected by detecting a client loss or the like, a control configuration is known that applies a link pass-through function for notifying the occurrence of a link break failure by causing the transmission apparatus on the transmission side to break the link. Further, even in a transmission system in which a plurality of transmission apparatuses are sequentially connected, it is possible to sequentially notify the occurrence of a link disconnection failure by applying a link pass-through function. There is also known a monitoring system that collects status information of a plurality of transmission devices by a monitoring device and monitors whether or not a failure has occurred. For example, as shown in FIG. 4, in a transmission system in which a plurality of transmission apparatuses (WDM-A, WDM-B) 103 to 108 are arranged between routers 100 and 101 and are sequentially connected by a transmission path, A The station is the router 101 and the transmission device (WDM-A) 103, the B station is the transmission device (WDM-B) 104, (WDM-A) 105, and the C station is the transmission device (WDM-B) 106, (WDM-A). 107, the D station is configured by the transmission device (WDM-B) 108 and the router 102, and the monitoring device 200 directly or variously monitors various status monitoring information including link disconnection detection information of the transmission devices 103 to 108. There is known a failure monitoring control system that collects data via a network (not shown) and monitors the status of each unit. In this case, each of the transmission apparatuses 103 to 108 performs data transmission by applying WDM (Wavelength Division Multiplexing), performs bidirectional optical wavelength division multiplexing transmission between the stations using a single optical transmission line, and includes two lines within the station. A case of a configuration in which optical wavelength division multiplexing transmission in one direction is performed by each optical transmission line is shown.

例えば、Ｂ局の伝送装置１０４から伝送装置１０５方向への伝送径路に、「断」として示すリンク断が発生すると、伝送装置１０５は、このリンク対応のクライアントロス検出等によりリンク断を検出し、伝送装置１０６方向への伝送径路の対応リンクを切断して、前段の伝送装置１０４はリンク断発生を検出し、且つ次段の伝送装置１０６に対してリンク断を通知する。この場合、Ｂ局の伝送装置１０５は、リンク断により、伝送装置１０４側からのクライアントロス（Ｃ−ＬＯＳ）検出の状態となり、伝送装置１０６は、リンクパススルーによりリンク断（Ｌｉｎｋｄｏｗｎ）検出の状態となる。他の伝送装置に於いても、リンクパススルーにより、同様の状態となり、ルータ１０１，１０２はリンク断発生を認識することができる。又このようなリンク断障害の発生により、状態情報としての接点情報は、「接点：ＣＬＮＴ−ＡＬＭ」として、監視装置２００へ伝送する。従って、監視装置２００に於いては、＜監視情報＞として示すように、Ａ局〜Ｄ局対応の「ＣＬＮＴ−ＡＬＭ発生」の同一の接点情報を収集することになる。   For example, when a link break indicated as “break” occurs in the transmission path from the transmission apparatus 104 of the station B to the transmission apparatus 105, the transmission apparatus 105 detects the link break by detecting a client loss corresponding to the link, and the like. The corresponding link of the transmission path in the direction of the transmission device 106 is disconnected, the transmission device 104 in the previous stage detects the occurrence of the link failure, and notifies the transmission device 106 in the next stage of the link failure. In this case, the transmission apparatus 105 of the station B is in a state of detecting a client loss (C-LOS) from the transmission apparatus 104 side due to the link disconnection, and the transmission apparatus 106 is in a state of detecting a link disconnection (Linkdown) due to link pass-through. Become. In other transmission apparatuses, the same state occurs due to the link pass-through, and the routers 101 and 102 can recognize the occurrence of the link disconnection. In addition, due to the occurrence of such a link disconnection failure, contact information as state information is transmitted to the monitoring apparatus 200 as “contact: CLNT-ALM”. Therefore, the monitoring device 200 collects the same contact information of “CLNT-ALM occurrence” corresponding to the A station to the D station, as shown as <monitoring information>.

しかし、収集した接点情報では、伝送装置１０４，１０５間の実際のリンク断障害発生を認識することはできない。なお、監視装置２００へ各伝送装置１０３〜１０８から送信する接点情報は、複数ビット構成とし、各ビットは、“０”又は“１”により監視点が正常か異常かを示し、又先頭からのビット配列位置と伝送装置内の監視点とを対応させる場合が一般的である。従って、リンク断か否かを示す接点情報は、先頭から所定のビット位置のビットを、例えば、正常時は“０”とし、リンク断検出により“１”とする。それにより、監視装置２００は、前回収集した接点情報と、今回収集した接点情報とを、先頭からのビット位置対応に照合することにより、各伝送装置対応の多数の監視点について、異常発生か否かを直ちに認識することができる。   However, the collected contact information cannot recognize an actual link disconnection failure between the transmission apparatuses 104 and 105. Note that the contact information transmitted from each transmission device 103 to 108 to the monitoring device 200 has a multi-bit configuration, and each bit indicates whether the monitoring point is normal or abnormal by “0” or “1”. In general, the bit arrangement position is associated with the monitoring point in the transmission apparatus. Accordingly, in the contact information indicating whether or not the link is broken, the bit at a predetermined bit position from the head is set to “0” when normal, for example, and “1” when the link is detected. As a result, the monitoring device 200 collates the contact information collected last time with the contact information collected this time in correspondence with the bit position from the head, thereby determining whether or not an abnormality has occurred at a large number of monitoring points corresponding to each transmission device. Can be recognized immediately.

又ＬＡＮ等の非同期伝送システムと、ＳＯＮＥＴ／ＳＤＨ等の同期伝送システムとの間で、伝送フォーマット変換を行って伝送するシステムに於いて、伝送装置間のリンク正常性確認プロトコルによるレスポンス受信の可否判定を相互に行い、レスポンス受信不可の場合にリンク断と判断し、リンク断検出情報を、例えば、ＳＤＨフレームのペイロードのパスオーバヘッドＰＯＨ等の所定位置のリンク断制御バイトによって通知する手段が提案されている（例えば、特許文献１参照）。又前述の場合と同様に、パケット伝送等の非同期伝送システムとＳＯＮＥＴ／ＳＤＨ等の同期伝送システムとの間で、伝送フォーマット変換を行って伝送し、非同期伝送システムの終端処理の１０ビット／８ビット変換時に、フロー情報ビットのリンク断検出信号が破棄され、従って、同期フレームには付加されない問題と、この問題により対向装置との間のフロー制御ができない問題と、同期フレームのペイロードにリンク断検出信号を付加した場合、他のチャネルの信号領域が狭くなる問題とがあることから、非同期フレームのフロー情報ビットからリンク断検出信号を抽出して、同期フレームのセクションオーバヘッドＳＯＨへ付加して伝送し、又同期フレームに付加されたリンク断検出信号を抽出して、非同期フレームのフロー情報ビットに付加して伝送する手段が提案されている（例えば、特許文献２参照）。   Also, in a system that performs transmission format conversion between an asynchronous transmission system such as a LAN and a synchronous transmission system such as SONET / SDH, whether or not a response can be received by a link normality confirmation protocol between transmission apparatuses. A means has been proposed in which a link disconnection is determined when a response cannot be received, and link disconnection detection information is notified by a link disconnection control byte at a predetermined position such as a path overhead POH of a payload of an SDH frame. (For example, refer to Patent Document 1). In the same way as described above, transmission format conversion is performed between an asynchronous transmission system such as packet transmission and a synchronous transmission system such as SONET / SDH, and 10 bits / 8 bits of termination processing of the asynchronous transmission system are performed. At the time of conversion, the link disconnection detection signal of the flow information bits is discarded, and therefore it is not added to the synchronization frame. When a signal is added, there is a problem that the signal area of other channels becomes narrow. Therefore, a link disconnection detection signal is extracted from the flow information bits of the asynchronous frame and added to the section overhead SOH of the synchronous frame and transmitted. In addition, by extracting the link break detection signal added to the synchronous frame, the flow information of the asynchronous frame In addition to Tsu preparative means for transmitting has been proposed (e.g., see Patent Document 2).

ＷＯ２００５／０１８１６７号公報WO2005 / 018167 特開２００６−５５０６号公報JP 2006-5506 A

対向接続された伝送装置の一方の伝送装置がリンク断検出を行った場合、他方の伝送装置に対してリンク断とすることにより、この他方の伝送装置はリンク断が発生したと判断して、一方の伝送装置に対する送信を停止する。このようなリンクパススルー機能については、既に知られている。しかし、図４に示すように、複数の伝送装置１０３〜１０８を伝送路により順次接続した伝送システムに於いて、リンクパススルー機能により、順次リンク断発生を通知し、各伝送装置対応の接点情報の「ＣＬＮＴ−ＡＬＭ」を監視装置２００が収集することになり、総て同一の接点情報であるから、監視装置２００に於いては、伝送装置１０４，１０５間のリンク断発生を判定することは不可能である。その為に、リンク断障害個所の修復が遅れて、データ伝送に於ける大きな障害となる。又前述の特許文献１，２に於いては、リンクパススルー方式に関する技術を示すとしても、監視装置に於いて収集した監視情報を基に、リンク断発生個所を特定する点に関する技術内容は示されていない。   When one transmission device of the oppositely connected transmission devices performs link disconnection detection, it is determined that the other transmission device has a link disconnection by setting the link disconnection to the other transmission device, Transmission to one transmission apparatus is stopped. Such a link pass-through function is already known. However, as shown in FIG. 4, in a transmission system in which a plurality of transmission apparatuses 103 to 108 are sequentially connected by a transmission path, the link pass-through function notifies the occurrence of sequential link disconnection and the contact information corresponding to each transmission apparatus. Since “CLNT-ALM” is collected by the monitoring device 200 and all the same contact information, it is impossible for the monitoring device 200 to determine the occurrence of a link break between the transmission devices 104 and 105. Is possible. For this reason, the repair of the broken link failure is delayed, which becomes a major obstacle in data transmission. Further, in the above-mentioned Patent Documents 1 and 2, the technical contents regarding the point of specifying the location where the link breakage occurs are shown based on the monitoring information collected by the monitoring device even though the technology related to the link pass-through method is shown. Not.

本発明は、前述の従来の問題点を解決することを目的とし、監視装置に於いて収集するリンク断検出情報と、このリンク断検出情報を基に順次転送するリンク断検出情報とを識別可能の構成として、障害発生個所を特定可能とするものである。   The present invention aims to solve the above-mentioned conventional problems, and can identify link break detection information collected by a monitoring device and link break detection information sequentially transferred based on the link break detection information. As a configuration, it is possible to specify the location where a failure has occurred.

本発明の障害監視制御システムは、複数の伝送装置を伝送路により順次接続してデータ伝送を行う伝送システムの前記各伝送装置の状態情報を接点情報として、監視装置により収集し、前記伝送システムの状態監視を行う障害監視制御システムであって、伝送装置は、前段の伝送装置との間のリンク断発生を検出した時に、次段の伝送装置に対してリモートリンク断情報を送出し、前段の伝送装置からリモートリンク断情報を受信した時に次段の伝送装置に対してリンクのシャットダウン処理を行う制御処理手段と、前段の伝送装置との間のリンク断発生を検出した時に、監視装置に対してリンク断検出接点情報を送出し、前段の伝送装置からのリモートリンク断情報を受信した時に、監視装置に対してリモートリンク断接点情報を送出する接点情報送出処理手段とを備え、監視装置は、各伝送装置からの接点情報を収集し、リモートリンク断接点情報を送出した伝送装置間に、リンク断検出接点情報を送出した２台の伝送装置が存在する時に、該２台の伝送装置間に於いてリンク断発生と判断する制御処理手段を備えている。   The fault monitoring and control system of the present invention collects status information of each transmission device of a transmission system that performs data transmission by sequentially connecting a plurality of transmission devices through a transmission line as contact information, and collects the information of the transmission system. A fault monitoring control system that performs state monitoring, and when a transmission device detects a link failure with a previous transmission device, the transmission device sends remote link disconnection information to the next transmission device, and When remote link disconnection information is received from a transmission device, the control device that performs link shutdown processing for the next-stage transmission device and the occurrence of link disconnection between the previous-stage transmission device and the monitoring device are detected. Link disconnection contact information is sent, and remote link disconnection information is sent to the monitoring device when remote link disconnection information is received from the previous transmission device. Point information transmission processing means, and the monitoring device collects contact information from each transmission device, and transmits two link disconnection detection contact information between the transmission devices that have transmitted the remote link disconnection contact information. Control processing means for determining that a link break has occurred between the two transmission apparatuses.

又前記伝送装置は、前段の伝送装置との間のリンク断発生を検出するリンク断検出機能部と、このリンク断検出機能部によるリンク断検出によりリモートリンク断情報を生成するリンク断情報生成部と、このリンク断情報生成部により生成したリモートリンク断情報を次段の伝送装置に送出するリンク断情報転送機能部と、前段の伝送装置からのリモートリンク断情報を受信処理するリンク断情報受信機能部と、このリンク断情報受信機能部によりリモートリンク断情報を受信して該当リンクをシャットダウンするシャットダウン制御機能部と、監視装置へ接点情報を送出する接点出力部と、リンク断検出機能部によるリンク断検出によりリンク断検出接点情報を、接点出力部から監視装置へ送出させ、又リンク断情報受信機能部によりリモートリンク断情報を受信した時に、接点出力部から監視装置へリモートリンク断接点情報を送出させる制御処理部とを備えている。   In addition, the transmission device includes a link failure detection function unit that detects occurrence of a link failure with the previous transmission device, and a link failure information generation unit that generates remote link failure information by detecting link failure by the link failure detection function unit. A link disconnection information transfer function unit for sending the remote link disconnection information generated by the link disconnection information generation unit to the next-stage transmission device, and a link disconnection information reception process for receiving the remote link disconnection information from the previous-stage transmission device. By the function unit, the shutdown control function unit that receives the remote link disconnection information by this link disconnection information reception function unit and shuts down the corresponding link, the contact output unit that transmits the contact information to the monitoring device, and the link disconnection detection function unit Link disconnection detection contact information is sent from the contact output unit to the monitoring device by link disconnection detection, and remote link is detected by the link disconnection information reception function unit. When receiving TRINC sectional information, and a control unit for sending a remote link disconnection contact information from the contact output unit to the monitoring device.

又前記伝送装置は、監視装置へリンク断検出によるリンク断検出情報を接点情報として送出し、前段の伝送装置からのリモートリンク断情報を受信した時に、監視装置に対してリンク断検出情報をマスクして、リモートリンク断情報のみを接点情報として送出する制御を行う制御処理部を備えている。   The transmission device sends link disconnection detection information based on link disconnection detection to the monitoring device as contact information, and masks the link disconnection detection information to the monitoring device when receiving remote link disconnection information from the previous transmission device. In addition, a control processing unit that performs control to send only remote link disconnection information as contact information is provided.

複数の伝送装置を順次接続してデータ伝送を行い、各伝送装置の状態情報を接点情報として監視装置により収集し、伝送システムの状態を監視する障害監視制御システムに於いて、監視装置により収集するリンク断検出情報と、このリンク断検出に伴うリモートリンク断情報とを利用することにより、監視装置に於いて、実際のリンク断発生の伝送装置を識別することが容易であるから、障害復旧の迅速化を図ることができる。   Data is transmitted by connecting a plurality of transmission devices in sequence, and the status information of each transmission device is collected by the monitoring device as contact information, and collected by the monitoring device in the fault monitoring control system that monitors the status of the transmission system By using the link disconnection detection information and the remote link disconnection information associated with this link disconnection detection, it is easy for the monitoring device to identify the transmission device in which the actual link disconnection has occurred. Speed can be achieved.

本発明の実施例１の要部説明図である。It is principal part explanatory drawing of Example 1 of this invention. 本発明の実施例１の障害監視制御の処理説明図である。It is processing explanatory drawing of the failure monitoring control of Example 1 of this invention. 本発明の実施例２の障害監視制御の処理説明図である。It is processing explanatory drawing of the failure monitoring control of Example 2 of this invention. 従来例の障害監視制御システムの説明図である。It is explanatory drawing of the failure monitoring control system of a prior art example.

本発明の障害監視制御システムは、図１を参照して説明すると、複数の伝送装置を伝送路により順次接続してデータ伝送を行う伝送システムの各伝送装置の状態情報を接点情報として、監視装置により収集し、複数の伝送装置を含む伝送システムの状態監視を行う障害監視制御システムであって、各伝送装置は、前段の伝送装置との間のクライアントロス等によりリンク断発生を検出した時に、次段の伝送装置に対してリモートリンク断情報を送出するリンク断情報転送機能部１３を含み、前段の伝送装置からリモートリンク断情報を受信した時に次段の伝送装置に対して該当リンクに対するシャットダウン処理を行うシャットダウン制御機能部１６，２６を含む制御処理手段と、前段の伝送装置との間のリンク断発生をリンク断検出機能部１６により検出した時に、監視装置に対してリンク断検出接点情報を送出し、前段の伝送装置からのリモートリンク断情報を受信した時に、監視装置に対してリモートリンク断接点情報を送出する接点出力部１５，２５及び制御処理部１４，２４を含む接点情報送出処理手段とを備え、監視装置は、各伝送装置からの収集した接点情報を基に、リモートリンク断接点情報を送出した伝送装置間に、リンク断検出接点情報を送出した２台の伝送装置が存在する時に、これら２台の伝送装置間に於いてリンク断発生と判断する制御処理手段を備えている。   The fault monitoring control system according to the present invention will be described with reference to FIG. 1. The monitoring apparatus uses the status information of each transmission device of a transmission system that performs data transmission by sequentially connecting a plurality of transmission devices via a transmission line as contact information. Is a failure monitoring and control system that monitors the status of a transmission system including a plurality of transmission devices, and when each transmission device detects the occurrence of a link breakage due to a client loss with the previous transmission device, It includes a link disconnection information transfer function unit 13 for sending remote link disconnection information to the next-stage transmission device, and when the remote link disconnection information is received from the previous-stage transmission device, the next-stage transmission device is shut down for the corresponding link. Link disconnection detection function unit for detecting the occurrence of a link disconnection between the control processing means including the shutdown control function units 16 and 26 for performing the processing and the transmission device in the previous stage 6 is output to the monitoring device when the link disconnection detection contact information is detected, and the remote link disconnection contact information is transmitted to the monitoring device when the remote link disconnection information is received from the previous transmission device. Contact information transmission processing means including control units 15 and 25 and control processing units 14 and 24, and the monitoring device transmits the remote link disconnection contact information based on the contact information collected from each transmission device. In addition, when there are two transmission apparatuses that send link disconnection detection contact information, a control processing means is provided for determining that a link disconnection has occurred between these two transmission apparatuses.

図１は、本発明の実施例１の要部説明図であり、Ａ局の伝送装置ＷＤＭ−ＡとＢ局の伝送装置ＷＤＭ−Ｂとの間のリンク断情報（リモートリンク断情報ＲＭＴ−ＬＮＫ）の送受信機能と監視装置に対する接点情報送出機能との要部のみを示す。同図に於いて、１１は送受信部、１２はリンク断情報生成機能部、１３はリンク断情報転送機能部、１４は制御処理部、１５は接点出力部、１６はリンク断検出機能部、２１は送受信部、２２はリンク断情報受信機能部、２３はリンク断情報出力機能部、２４は制御処理部、２５は接点出力部、２６はシャットダウン制御機能部を示す。又接点出力部１５，２５は、伝送装置内の各部の状態情報を接点情報として監視装置へ送出する機能を有するものであり、例えば、前述の図４に示す監視装置２００に対して各種の状態情報を接点情報として送出する。この接点情報の転送径路は図示を省略している。又リンク断情報転送機能部１３は、伝送装置ＷＤＭ−Ｂとの間で送受信処理する送受信部（図示を省略）に設け、同様に、リンク断情報受信機能部２２は、伝送装置ＷＤＭ−Ｂの伝送装置ＷＤＭ−Ａとの間で送受信処理する送受信部（図示を省略）に設け、それぞれの送受信部間は、１本の伝送路による双方向の光波長多重伝送を行う構成を有するものであり、伝送装置ＷＤＭ−Ａと伝送装置ＷＤＭ−Ｂとは、例えば、図４に於けるＢ局の伝送装置１０５（ＷＤＭ−Ａ）と、Ｃ局の伝送装置１０６（ＷＤＭ−Ｂ）とに対応する構成を有するものである。   FIG. 1 is an explanatory diagram of a main part of the first embodiment of the present invention, in which link disconnection information (remote link disconnection information RMT-LNK) between a transmission apparatus WDM-A at station A and a transmission apparatus WDM-B at station B is illustrated. Only the main parts of the transmission / reception function and the contact information transmission function for the monitoring device are shown. In the figure, 11 is a transmission / reception unit, 12 is a link disconnection information generation function unit, 13 is a link disconnection information transfer function unit, 14 is a control processing unit, 15 is a contact output unit, 16 is a link disconnection detection function unit, 21 Is a transmission / reception unit, 22 is a link disconnection information reception function unit, 23 is a link disconnection information output function unit, 24 is a control processing unit, 25 is a contact output unit, and 26 is a shutdown control function unit. The contact output units 15 and 25 have a function of sending status information of each part in the transmission device to the monitoring device as contact information. For example, the contact output units 15 and 25 have various states with respect to the monitoring device 200 shown in FIG. Information is sent as contact information. The contact information transfer path is not shown. The link disconnection information transfer function unit 13 is provided in a transmission / reception unit (not shown) that performs transmission / reception processing with the transmission device WDM-B. Similarly, the link disconnection information reception function unit 22 is connected to the transmission device WDM-B. A transmission / reception unit (not shown) that performs transmission / reception processing with the transmission device WDM-A has a configuration for performing bidirectional optical wavelength division multiplexing transmission using a single transmission path between the transmission / reception units. The transmission apparatus WDM-A and the transmission apparatus WDM-B correspond to, for example, the B station transmission apparatus 105 (WDM-A) and the C station transmission apparatus 106 (WDM-B) in FIG. It has a configuration.

又伝送装置ＷＤＭ−Ａの前段の伝送装置（図示を省略）との間は、２本の伝送路により接続し、同様に、伝送装置ＷＤＭ−Ｂの後段の伝送装置（図示を省略）との間は、２本の伝送路により接続した構成とし、光波長多重化信号の受信及び送信の制御処理を行う送受信部１１は、リンク断検出機能部１６を含み、このリンク断検出部１６により、前段の伝送装置（図示を省略）からのクライアント断（単一又は複数のリンク対応波長の光信号断）検出等によってリンク断を検出すると、リンク断情報生成機能部１２及び制御処理部１４へリンク断発生を通知する。制御処理部１４は、リンク断検出機能部１６からのリンク断発生通知により、リンク断発生のリンク情報を基に、前段の伝送装置（図示を省略）に対するリンクのシャットダウン処理を行うように送受信部１１に対する制御を行う。又リンク断情報生成機能部１２は、リンク断検出機能部１６からのリンク断の検出通知により、リモートリンク断情報を生成し、リンク断情報転送機能部１３へ転送する。このリンク断情報転送機能部１３は、制御処理部１４からの制御によって、リンク情報を含むリンク断情報（リモートリンク断情報）を伝送装置ＷＤＭ−Ｂへ転送する。又制御処理部１４は、接点出力部１５を制御して、図示を省略した監視装置に対してリンク断発生の接点情報を送出させる。   The transmission device WDM-A is connected to the previous transmission device (not shown) by two transmission lines, and similarly to the subsequent transmission device (not shown) of the transmission device WDM-B. The transmission / reception unit 11 that performs the control processing of the reception and transmission of the optical wavelength multiplexed signal includes a link disconnection detection function unit 16, and the link disconnection detection unit 16 When link disconnection is detected by detecting a client disconnection (optical signal disconnection of a single or a plurality of link-corresponding wavelengths) from a previous transmission apparatus (not shown), the link is made to the link disconnection information generation function unit 12 and the control processing unit 14 Notify the occurrence of disconnection. The control processing unit 14 receives and transmits a link disconnection from the link disconnection detection function unit 16, and performs transmission / reception processing so as to perform link shutdown processing for the transmission device (not shown) in the previous stage based on link information on the occurrence of link disconnection. 11 is controlled. The link disconnection information generation function unit 12 generates remote link disconnection information in response to a link disconnection detection notification from the link disconnection detection function unit 16 and transfers it to the link disconnection information transfer function unit 13. The link disconnection information transfer function unit 13 transfers link disconnection information (remote link disconnection information) including link information to the transmission device WDM-B under the control of the control processing unit 14. Further, the control processing unit 14 controls the contact output unit 15 to send the contact information on the occurrence of the link breakage to the monitoring device (not shown).

伝送装置ＷＤＭ−Ｂは、前段の伝送装置ＷＤＭ−Ａからのリンク断情報（リモートリンク断情報）を、リンク断情報受信機能部２２により受信し、リンク断情報出力機能部２３と、送受信部２１のシャットダウン制御機能部２６とに対してリンク断情報を転送する。リンク断情報出力機能部２３は、制御処理部２４に、受信したリンク断情報（リモートリンク断情報）を転送し、制御処理部２４は、接点出力部２５を制御して、図示を省略した監視装置に対してリンク断発生の接点情報を送出させる。又送受信部２１のシャットダウン制御機能部２６は、リンク断情報受信機能部２２からのリンク情報を含むリンク断情報と、制御処理部２４からの制御情報とに従って、対応リンクのシャットダウンの制御を行う。それによって、伝送装置ＷＤＭ−Ｂの図示を省略した次の伝送装置に対して、リンクパススルー方式に従ったリンク断情報を転送することになる。   The transmission device WDM-B receives the link disconnection information (remote link disconnection information) from the previous transmission device WDM-A by the link disconnection information reception function unit 22, and receives the link disconnection information output function unit 23 and the transmission / reception unit 21. The link disconnection information is transferred to the shutdown control function unit 26. The link disconnection information output function unit 23 transfers the received link disconnection information (remote link disconnection information) to the control processing unit 24, and the control processing unit 24 controls the contact output unit 25 to omit the illustration. Contact information about the occurrence of link breakage is sent to the device. The shutdown control function unit 26 of the transmission / reception unit 21 controls the shutdown of the corresponding link according to the link disconnection information including the link information from the link disconnection information reception function unit 22 and the control information from the control processing unit 24. As a result, the link disconnection information according to the link pass-through method is transferred to the next transmission apparatus, which is not illustrated in the transmission apparatus WDM-B.

図２は、本発明の実施例１の障害監視制御の処理説明図であり、ルータ１，２間に複数の伝送装置（ＷＤＭ−Ａ，ＷＤＭ−Ｂ）３〜８を接続した伝送システムを示し、図４に示す伝送システムと同様に、ルータ１と伝送装置３とによりＡ局を構成し、伝送装置４，５によりＢ局を構成し、伝送装置６，７によりＣ局を構成し、伝送装置８とルータ２とによりＤ局を構成し、各局Ａ，Ｂ，Ｃ，Ｄ間は、単一の送受信共通の光伝送路により接続し、各局内は送信用と受信用との２本の光伝送路により接続して、光波長多重伝送を行うシステムを示す。なお、監視装置は図示を省略している。又ルータ１，２及び伝送装置３〜８のそれぞれ下方に示すＬｉｎｋｄｏｗｎ、Ｃ−ＬＯＳ、ＲＭＴ−ＬＮＫと、それらの右側又は左側に付加した黒丸印とは、リンク断検出、クライアントロス検出、リモートリンク断検出を示すと共に、情報受信方向と情報送信方向と原因発生方向とを示す。又各伝送装置３〜８対応接点情報を示す。   FIG. 2 is an explanatory diagram of processing for fault monitoring control according to the first embodiment of the present invention, and shows a transmission system in which a plurality of transmission apparatuses (WDM-A, WDM-B) 3 to 8 are connected between routers 1 and 2. As in the transmission system shown in FIG. 4, the router 1 and the transmission device 3 constitute the A station, the transmission devices 4 and 5 constitute the B station, the transmission devices 6 and 7 constitute the C station, and transmission The station 8 is constituted by the device 8 and the router 2, and the stations A, B, C, and D are connected by a single transmission / reception common optical transmission line, and each station has two transmission and reception terminals. 1 shows a system that performs optical wavelength division multiplexing by connecting with an optical transmission line. Note that the monitoring device is not shown. The linkdown, C-LOS, and RMT-LNK shown below the routers 1 and 2 and the transmission devices 3 to 8 and the black circles added to the right or left side of them are link disconnection detection, client loss detection, and remote link. In addition to indicating disconnection detection, an information reception direction, an information transmission direction, and a cause occurrence direction are indicated. In addition, contact information corresponding to each of the transmission devices 3 to 8 is shown.

例えば、伝送装置５のＣ−ＬＯＳの左側の黒丸は、伝送装置５の左側の伝送装置４との間で発生したリンク断によるクライアントロス検出を示し、又伝送装置４のＬｉｎｋｄｏｗｎの右側の黒丸印は、伝送装置５のリンク断検出による対応リンクをシャットダウンしたことによるリンク断検出を示す。又伝送装置３のＲＭＴ−ＬＮＫの右側の黒丸は、伝送装置４のリンク断情報生成機能部１２（図１参照）からのリモートリンク断情報を示す。従って、この場合の伝送装置３からの接点情報は、「接点：ＣＬＮＴ−ＡＬＭ ＲＭＴ−ＬＮＫ」となる。又伝送装置４からの接点情報は、「接点：ＣＮＴ−ＡＬＭ」、又最初にリンク断検出を行った伝送装置５からの接点情報は、「接点：ＣＬＮＴ−ＡＬＭ」、伝送装置６からの接点情報は、「接点：ＣＬＮＴ−ＡＬＭ ＲＭＴ−ＬＮＫ」、伝送装置７からの接点情報は、「接点：ＣＬＮＴ−ＡＬＭ」、伝送装置８からの接点情報は、「接点：ＣＬＮＴ−ＡＬＭ ＲＭＴ−ＬＮＫ」となる。このような接点情報を監視装置に於いて収集することにより、リモートリンク断を示す接点情報ＲＭＴ−ＬＮＫを送出した伝送装置３，６間に位置する二つの伝送装置４，５間に於いてリンク断が発生したと判断し、リモートリンク断を示す接点情報ＲＭＴ−ＬＮＫを送出した伝送装置６，８間は、一つの伝送装置７が存在することから正常と判断する。即ち、監視装置は、各伝送装置３〜８からの接点情報を収集し、それらの接点情報の中のリモートリンク断の接点情報ＲＭＴ−ＬＮＫを送出しない伝送装置が隣り合っている場合に、その伝送装置間でリンク断発生と判断する。   For example, a black circle on the left side of the C-LOS of the transmission apparatus 5 indicates client loss detection due to a link disconnection with the transmission apparatus 4 on the left side of the transmission apparatus 5, and a black circle mark on the right side of the linkdown of the transmission apparatus 4 Indicates link disconnection detection by shutting down the corresponding link due to link disconnection detection of the transmission device 5. A black circle on the right side of RMT-LNK of the transmission apparatus 3 indicates remote link disconnection information from the link disconnection information generation function unit 12 (see FIG. 1) of the transmission apparatus 4. Accordingly, the contact information from the transmission device 3 in this case is “contact: CLNT-ALM RMT-LNK”. The contact information from the transmission device 4 is “contact: CNT-ALM”, and the contact information from the transmission device 5 that first detected the link break is “contact: CLNT-ALM”, the contact from the transmission device 6. The information is “contact: CLNT-ALM RMT-LNK”, the contact information from the transmission device 7 is “contact: CLNT-ALM”, and the contact information from the transmission device 8 is “contact: CLNT-ALM RMT-LNK”. It becomes. By collecting such contact information in the monitoring device, a link is established between the two transmission devices 4 and 5 located between the transmission devices 3 and 6 that have transmitted the contact information RMT-LNK indicating the remote link disconnection. It is determined that a disconnection has occurred and that there is one transmission device 7 between the transmission devices 6 and 8 that has transmitted the contact information RMT-LNK indicating remote link disconnection. That is, the monitoring device collects contact information from each of the transmission devices 3 to 8, and when the transmission devices that do not send the remote link disconnection contact information RMT-LNK are adjacent to each other, It is determined that a link break has occurred between transmission devices.

図３は、本発明の実施例２の障害監視制御の説明図であり、図２と同一符号は同一部分を示す。前述の場合と同様に伝送装置４，５間でリンク断発生の場合の各伝送装置３〜８からの接点情報は同一内容となるが、例えば、伝送装置３，６，８からの接点情報は、リモートリンク断の情報ＲＭＴ−ＬＮＫを含むので、この場合、リンク断情報ＣＬＮＴ−ＡＬＭをマスクし、接点情報は、「接点：ＲＭＴ−ＬＮＫ」として監視装置へ送出する。従って、監視装置では、収集した接点情報の「接点：ＲＭＴ−ＬＮＫ」によりリンク断障害発生と判断し、そのリンク断発生個所は、接点情報の「接点：ＲＭＴ−ＬＮＫ」を送出した伝送装置間に於いて、接点情報の「接点：ＣＬＮＴ−ＡＬＭ」を送出した伝送装置が隣り合っている場合に、その隣り合っている伝送装置間でリンク断発生と判断する。この場合、リモートリンク断情報ＲＭＴ−ＬＮＫを送出した伝送装置３，６，８に対して、リンク断情報ＣＬＮＴ−ＡＬＭを送出した伝送装置４，５，７が存在し、リモートリンク断情報ＲＭＴ−ＬＮＫを送出した伝送装置３，６間に、リンク断情報ＣＬＮＴ−ＡＬＭを送出した２台の伝送装置４，５が存在するから、この伝送装置４，５間にリンク断が発生したことを判断することができる。従って、伝送装置４，５間のリンク断発生個所に対して、迅速に回復処理を行うことが可能となる。   FIG. 3 is an explanatory diagram of failure monitoring control according to the second embodiment of the present invention, where the same reference numerals as those in FIG. 2 denote the same parts. As in the case described above, the contact information from each of the transmission devices 3 to 8 when the link breakage occurs between the transmission devices 4 and 5 has the same content. For example, the contact information from the transmission devices 3, 6, and 8 In this case, the link disconnection information CLNT-ALM is masked, and the contact information is sent to the monitoring device as “contact: RMT-LNK”. Therefore, the monitoring device determines that a link break failure has occurred based on the collected contact information “contact: RMT-LNK”, and the link break occurrence location is between the transmission devices that sent the contact information “contact: RMT-LNK”. In this case, when the transmission devices that send out the contact information “contact: CLNT-ALM” are adjacent to each other, it is determined that the link is broken between the adjacent transmission devices. In this case, there are transmission apparatuses 4, 5, and 7 that have transmitted link disconnection information CLNT-ALM to transmission apparatuses 3, 6, and 8 that have transmitted remote link disconnection information RMT-LNK, and remote link disconnection information RMT- Since there are two transmission apparatuses 4 and 5 that have transmitted link disconnection information CLNT-ALM between the transmission apparatuses 3 and 6 that have transmitted LNK, it is determined that a link disconnection has occurred between the transmission apparatuses 4 and 5. can do. Therefore, it is possible to quickly perform a recovery process on the location where the link break between the transmission apparatuses 4 and 5 occurs.

１，２ ルータ
３〜８ 伝送装置（ＷＤＭ−Ａ，ＷＤＭ−Ｂ）
１１ 送受信部
１２ リンク断情報生成機能部
１３ リンク断情報転送機能部
１４ 制御処理部
１５ 接点出力部
２１ 送受信部
２２ リンク断情報受信機能部
２３ リンク断情報接点出力機能部
２４ 制御処理部
２５ 接点出力部
ＷＤＭ−Ａ，ＷＤＭ−Ｂ 伝送装置 1, 2 routers 3-8 transmission equipment (WDM-A, WDM-B)
DESCRIPTION OF SYMBOLS 11 Transmission / reception part 12 Link disconnection information generation function part 13 Link disconnection information transfer function part 14 Control processing part 15 Contact output part 21 Transmission / reception part 22 Link disconnection information reception function part 23 Link disconnection information contact output function part 24 Control processing part 25 Contact output WDM-A, WDM-B transmission equipment

Claims (3)

複数の伝送装置を伝送路により順次接続してデータ伝送を行う伝送システムの前記各伝送装置の状態情報を接点情報として、監視装置により収集し、前記伝送システムの状態監視を行う障害監視制御システムに於いて、
前記伝送装置は、前段の伝送装置との間のリンク断発生を検出した時に、次段の伝送装置に対してリモートリンク断情報を送出し、前段の伝送装置からリモートリンク断情報を受信した時に次段の伝送装置に対してリンクのシャットダウン処理を行う制御処理手段と、前記リンク断発生を検出した時に、前記監視装置にリンク断検出接点情報を送出し、前段の伝送装置から前記リモートリンク断情報を受信した時に、前記監視装置にリモートリンク断接点情報を送出する接点情報送出処理手段とを備え、
前記監視装置は、前記伝送装置からの接点情報を収集し、前記リモートリンク断接点情報を送出した伝送装置間に、前記リンク断検出接点情報を送出した２台の伝送装置が存在する時に、該２台の伝送装置間に於いてリンク断発生と判断する制御処理手段を備えている
ことを特徴とする障害監視制御システム。 A failure monitoring control system that collects status information of each transmission device of a transmission system that sequentially transmits data by connecting a plurality of transmission devices through a transmission line as contact information and monitors the status of the transmission system. In
When the transmission device detects the occurrence of a link disconnection with the previous transmission device, it sends remote link disconnection information to the next transmission device, and receives the remote link disconnection information from the previous transmission device. Control processing means for performing a link shutdown process for the transmission device at the next stage, and when detecting the occurrence of the link breakage, sending link breakage detection contact information to the monitoring device, and sending the remote link breakage from the transmission device at the previous stage. Contact information transmission processing means for transmitting remote link disconnection contact information to the monitoring device when information is received,
The monitoring device collects contact information from the transmission device, and when there are two transmission devices that transmit the link disconnection detection contact information between the transmission devices that transmit the remote link disconnection contact information, A failure monitoring and control system comprising a control processing means for determining that a link break has occurred between two transmission devices. 前記伝送装置は、前段の伝送装置との間のリンク断発生を検出するリンク断検出機能部と、該リンク断検出機能部によるリンク断検出によりリモートリンク断情報を生成するリンク断情報生成部と、該リンク断情報生成部により生成したリモートリンク断情報を次段の伝送装置に送出するリンク断情報転送機能部と、前段の伝送装置からのリモートリンク断情報を受信処理するリンク断情報受信機能部と、該リンク断情報受信機能部によりリモートリンク断情報を受信して該当リンクをシャットダウンするシャットダウン制御機能部と、前記監視装置へ接点情報を送出する接点出力部と、前記リンク断検出機能部によるリンク断検出によりリンク断検出接点情報を前記接点出力部から前記監視装置へ送出させ、前記リンク断情報受信機能部により前記リモートリンク断情報を受信した時に、前記接点出力部から前記監視装置へリモートリンク断接点情報を送出させる制御処理部とを備えたことを特徴とする請求項１記載の障害監視制御システム。   The transmission device includes a link failure detection function unit that detects occurrence of a link failure with a previous transmission device, and a link failure information generation unit that generates remote link failure information by detecting link failure by the link failure detection function unit; A link disconnection information transfer function unit that sends the remote link disconnection information generated by the link disconnection information generation unit to the next-stage transmission device, and a link disconnection information reception function that receives and processes the remote link disconnection information from the previous-stage transmission device A shutdown control function unit that receives remote link disconnection information by the link disconnection information reception function unit and shuts down the corresponding link, a contact output unit that transmits contact information to the monitoring device, and the link disconnection detection function unit The link break detection contact information is sent from the contact output unit to the monitoring device by the link break detection by the link break information reception function unit. Wherein when receiving a remote link disconnection information, fault monitoring control system according to claim 1, characterized in that a control unit for sending a remote link disconnection contact information to the monitoring device from the contact output unit Ri. 前記伝送装置は、前記監視装置へリンク断検出によるリンク断検出情報を接点情報として送出し、前段の伝送装置からのリモートリンク断情報を受信した時に、前記監視装置に対してリンク断検出情報をマスクして、リモートリンク断情報のみを接点情報として送出する制御を行う制御処理部を備えたことを特徴とする請求項１又は２記載の障害監視制御システム。   The transmission device sends link disconnection detection information based on link disconnection detection to the monitoring device as contact information, and when remote link disconnection information is received from the previous transmission device, the link disconnection detection information is sent to the monitoring device. 3. The fault monitoring control system according to claim 1, further comprising a control processing unit that performs masking and performs control to send only remote link disconnection information as contact information.
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JPH0936827A (en) * 1995-07-19 1997-02-07 Nippon Telecom Kk Transmission line fault section decision processing system
JPH10242967A (en) * 1997-02-27 1998-09-11 Fujitsu Denso Ltd Fault monitoring system
JP2003110585A (en) * 2001-09-26 2003-04-11 Nec Corp Alert transfer system
JP2004320683A (en) * 2003-02-27 2004-11-11 Nec Corp Warning transfer method and broader-based ethernet screen
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