JP4061153B2 - Loop type transmission line fault monitoring system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fault monitoring system for a loop transmission line such as a ring LAN.
[0002]
A technology that monitors the status of transmission devices and transmission lines that make up a loop transmission line with a multi-route configuration is known. Judgment of communication stoppage when a failure occurs in a transmission line or transmission device is determined. It is hoped to do.
[0003]
[Prior art]
FIG. 20 is an explanatory diagram of the first conventional example. This conventional example 1 relates to a communication failure determination method (Japanese Patent No. 3036989) for a multi-route configuration network. FIG. 20 shows a network model of a multi-route configuration, in which R1 to R7 are exchanges constituting an exchange network, a1 , A2, b1, b2, c1, and c2 are transmission path paths, respectively, and terminal A, terminal B, and terminal C are connected to the switching network, and terminals A to C are connected to A1 to A4, B1, B2, and C1, respectively. , C2 ports, and a plurality of routes are provided between terminals. For example, between the terminal A and the terminal B, an AB1 route (port A1, transmission line a1, exchange R1, exchange R3, transmission line path b1, port B1) and an AB2 route (port A2, transmission line) There are two routes: path a2, exchange R2, exchange R5, transmission path path b2, port B2) or (port A2, transmission path path a2, exchange R2, exchange R7, exchange R5, transmission path path b2, port B2). .
[0004]
These multi-route configurations are expanded in the memory, and path information corresponding to communication lines constituting each route and multi-route information corresponding to each route configuration are created. The status of the path is managed by the path management record. Under the management record, a relay record that links to the relay communication facility through which the path passes is provided, and a terminal that links information of multiple terminal systems under the relay record Record exists. For multi-route information, system records are created for the number of systems under the management record, and further, route records are created for the number of routes. The management record manages the status of the entire configuration, the system record manages the status of the entire system, the route record manages the status of the route, and manages the link information between the route and the path and the terminal system, and the switching destination route information.
[0005]
Using this information, when a failure occurs in a transmission path, the route that is affected by the link information of the path and is in a stopped state can be known. In addition, it is possible to determine whether or not a route has been stopped by using link information even when a switch or a switching path fails.
[0006]
FIG. 21 is an explanatory diagram of the second conventional example. This conventional example 2 relates to a failure management system for a multi-wave ring LAN (Japanese Patent No. 3133172). FIG. 21 shows a configuration of a multi-wave ring LAN, and a master station 81 is connected to a centralized management computer 80. The master station 81, the station 82, and the station 83 are connected in a ring shape from the ring 1 to the ring n. The central management computer 80 detects a failure of the ring 1 to ring n by the notification from the master station 81 and centrally manages the communication status of each ring 1 to ring n. The central management computer 80 also monitors the execution of backup processing that causes other rings to process the failed ring and the operation of each station. In order to detect a ring failure, a monitoring frame is periodically transmitted from the master station 81 to each station. When the monitoring frame is transmitted a certain number of times and there is no response from each station, the basic control unit checks the board that is connected to the link of each station on a one-to-one basis, and finds the maximum number of boards that are operating normally. Judge the few rings as faulty rings and notify the centralized computer. As a result, control is performed so that backup processing is performed so that data transmitted / received via the ring determined to be faulty is transmitted / received by a ring other than the ring determined to be faulty.
[0007]
[Problems to be solved by the invention]
In the above-described conventional example 1, a plurality of paths are set between the terminals. However, this path is a one-way path, and when a failure occurs in equipment on the path and between transmission apparatuses. When a transmission error or a reception error occurs, it is determined that the path has stopped. However, if a transmission device that constitutes a loop transmission line uses separate transmission lines for transmission and reception, and if transmission and reception are performed separately on separate transmission lines, it will pass through the equipment even if the equipment stops. Whether the path to be performed has a bypass function that does not stop or a loopback function that performs loopback communication when the equipment is stopped. Whether the terminal communication stops when a failure occurs in the determination method of Conventional Example 1 Cannot be accurately determined. This determination is called stop determination.
[0008]
The method of Conventional Example 2 employs a technique for transmitting a monitoring frame on the LAN for the purpose of accurately determining stoppage. However, in the configuration of a loop type transmission line with loopback and bypass, When you want to predict whether or not a communication failure will occur when a specific transmission device or transmission line stops (when you need to know by simulation how the failure will affect the failure) It cannot be predicted according to Conventional Example 2.
[0009]
The present invention relates to a fault monitoring system for a loop type transmission line that enables accurate stop determination with respect to a fault or stop of the transmission unit or transmission line with respect to a loop type transmission line having a plurality of transmission lines for sequentially connecting a plurality of transmission apparatuses. The purpose is to provide.
[0010]
[Means for Solving the Problems]
FIG. 1 is a diagram showing a principle configuration of the present invention. In the figure, 1 is a monitoring device having a communication function with each transmission device and status information collection device, 10 is a processing unit, 10a is connection information table creation means, 10b is current status management table creation means, 10c is fault judgment means, 11 is a storage unit, 11a is a connection information table, 11b is a current state management table, 11c is a pseudo state management table, 12 is an input means such as a keyboard and a mouse, 13 is an output means having a display and printing function, and 2 is a plurality. The transmission device 3 constituting the loop type transmission line is a status information collection device for collecting status information of a plurality of transmission devices.
[0011]
In the present invention, a bypass state and a loopback state are added as state information of each transmission apparatus constituting the loop transmission line, so that it is possible to accurately determine a stop even in the loop transmission line. In addition, by creating a simulated failure state in a transmission device or transmission line, the occurrence of a communication failure can be predicted assuming that a failure occurs in any transmission device or transmission line.
[0012]
The connection information table creation means 10a of the processing unit 10 is a conventional technique. When activated by an instruction from the input means 12 or a signal (not shown) generated at a fixed period, each transmission device 2 is assigned to each by the conventional technique. Information indicating the identification information and connection order (either clockwise or counterclockwise) of transmission devices connected to each transmission path (clockwise, counterclockwise) provided is acquired and set in the connection information table 11a. Thereafter, when the current state management table creating means 10b is activated by an instruction from the input means 12 or a signal (not shown) generated at a constant cycle, each transmission device 2 set in the connection information table 11a is notified. When the status information is requested from the transmission device 2 and the status information (including failure, bypass and loopback) is received from the respective transmission devices 2, each status information corresponding to each transmission device 2 set in the connection information table 11a is received. Set. When a failure occurs in the transmission device 2, or a bypass or loopback occurs, the transmission device 2 notifies the monitoring device 1 of the failure and related state information, and updates the current state management table 11b. , Information such as a failure corresponding to the corresponding transmission device is set. Thereafter, the failure is caused by an instruction from the input means 12, a signal (not shown) generated at a fixed period, or a signal (not shown) generated after a lapse of a certain time from the time when the status information is notified from the transmission device 2. When the determination unit 10c is activated, the bypass state and loopback state of each transmission device and transmission path are determined based on the current state management table 11b, and it is determined which communication device and communication between the transmission devices are stopped.
[0013]
In addition, when it is assumed that a bypass or a loopback is formed due to a failure in a specific transmission apparatus, a state such as a virtual failure in the pseudo state management table 11c having the same configuration as the current state management table 11b Set the information. Based on the contents of the pseudo-state management table 11c, the failure determination means 10c determines which transmission device communication is to be stopped. As a result, it is possible to accurately perform the stop determination including the assumption of the occurrence of the bypass and the loopback assuming the location where the failure has occurred.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 shows a configuration example of a monitoring system according to the present invention. Is a configuration example 1, B.1. Is a configuration example 2, C.I. Is Configuration Example 3. In the figure, 1 is a monitoring device, 12a is a keyboard, 12b is a mouse, 13a is a display device, 13b is a printing device, 2 is a transmission device, 3 is a status information collection device, and a portion surrounded by a dotted line is the monitoring device 1. This represents a monitoring system including the related input / output devices 12a to 13b.
[0015]
Each configuration example 1 to configuration example 3 in FIG. 2 is different in the configuration for collecting the status information from each transmission device 2. In the configuration example 1 shown in FIG. 4, the monitoring device 1 instructs each transmission device to request status information (the contents of the status information collection process will be described later), and the status information is sent to the monitoring device 1 in a response form. Send. B. In the configuration example 2 shown in FIG. 2, the state information collection device 3 collects the state information of each transmission device 2 instead of the monitoring device 1, and the state information collection device 3 autonomously collects the state information collected by the state information collection device 3. Alternatively, a transmission request is made from the monitoring device 1 at an arbitrary time to transmit to the monitoring device 1. With this configuration example 2, the load can be distributed as compared with the case where the monitoring device 1 collects the state information. C. The configuration example 3 shown in FIG. 5 is a combination of the configuration example 1 and the configuration example 2 described above. For the standard transmission device 2, the monitoring device 1 directly collects status information and the non-standard transmission device 2 Thus, the status information collection device 3 collects the status information and transmits the status information from the status information collection device 3 to the monitoring device 1.
[0016]
FIG. 3 shows an example of the data structure of the status information, in which the leading a is set to transmission device identification information, b is a node (transmission device) failure status, c is a loopback status, and d is a bypass status. Necessary information can be added in addition to b to d as the state information of the transmission apparatus (node).
[0017]
FIG. 4 shows a configuration example of a plurality of loop type transmission lines, in which 1 denotes a monitoring device, 4a denotes a clockwise loop type transmission line, 4b denotes a counterclockwise loop type transmission line, and A to E denote A transmission device (node) 2 is represented. FIG. 5 shows a configuration example of connection information to be collected, which is connection information sent from the transmission device in response to a connection information transfer instruction from the monitoring device 1 to the transmission device. Transmission device identification information (including the distinction between right-handed and left-handed).
[0018]
FIG. 6 is an example of the created connection information table, showing a clockwise connection information table created in the case of the configuration example of the loop transmission path shown in FIG. 4, and the counterclockwise connection information table is shown in FIG. This corresponds to a configuration in which the lower row of the table shown in FIG.
[0019]
FIG. 7 is a flowchart for creating a connection information table. This flowchart corresponds to the connection information table creating means 10a shown in FIG. 1, and is disclosed in Japanese Patent No. 2588942 (name: network configuration management DB automatic creation method). Using technology, collect connection information that represents the connection relationship of the transmission equipment, and create it based on that information.
[0020]
The transmission apparatus identification information of the connection destination of the own transmission apparatus is extracted from the connection information (information shown in the configuration example of FIG. 5) collected first (S1 of FIG. 7), and the clockwise transmission apparatus identification information is the node field. Is registered (S2). If not registered, it is determined whether the left-hand transmission device identification information is registered in the node field (S3). If not registered here, the identification information of the own transmission device is added to the first line (S4), the processing for the transmission device is terminated, and if registered, the own transmission device Is added to the next line of the registered clockwise transmission apparatus (S5), and the connection information processing of this transmission apparatus is terminated.
[0021]
If the right-hand transmission device identification information has been registered in the node field in S2, the own transmission device identification information is added to the previous line of the registered right-hand transmission device (S6), It is determined whether or not the transmission device identification information is registered in the node field (S7). If it is not registered, the processing for this transmission device is terminated. Is moved to the previous line of the own transmission device (S8), and the process is terminated. The flow of FIG. 7 is executed every time connection information is received from each connection destination transmission apparatus. In the case of the loop type transmission path configuration shown in FIG. 4, the connection information table (right side) shown in FIG. Around) is created.
[0022]
After the connection information table is created, the monitoring device 1 creates a current state management table (11b in FIG. 1).
[0023]
FIG. 8 is a flowchart for creating the current state management table, and this flowchart corresponds to the current state management table creating means 10b of FIG.
[0024]
First, the connection information table is read (S1 in FIG. 8). This is to read the connection information table having the structure shown in FIG. 6 created by the connection information table creation flowchart shown in FIG. Next, items of “node failure status”, clockwise and counterclockwise “loopback status”, and “bypass status” are added to the connection information table to create a current status management table (S2 in FIG. 8). The initial state of the current state management table created in this way is shown in FIG. 9 and shows node failure status (whether it has occurred), information indicating the clockwise loopback and bypass status, and counterclockwise loopback and bypass status. Is set.
[0025]
Next, a request for the latest state is given to the transmission device and the state information collecting device (in the case of B and C in FIG. 2) (S3 in FIG. 8), and the latest state is received from the transmission device and the state information collecting device. When a state corresponding to node failure, loopback, or bypass has occurred, the corresponding part of the current state management table is updated (S4 in FIG. 8).
[0026]
As described above, when the status of each transmission device of a loop transmission line having a plurality of nodes is set in the current status management table, it is constant from the time when the status information is notified from the transmission device at a fixed cycle or by an operator instruction. After a lapse of time, a failure determination is performed by the monitoring device (1 in FIG. 4).
[0027]
FIG. 10 is a flowchart of failure determination, and this flowchart corresponds to the failure determination means 10c of FIG. First, the “check order” is clockwise, and the “extraction position” is the starting node (S1 in FIG. 10). This “origin node” represents one transmission apparatus (node) of two transmission apparatuses that form a communication section for determining whether or not communication is possible. Next, the state of the node at the “takeout position” is taken out (S2 in FIG. 10), and it is determined whether the node is the origin node (S3). If the node is the origin node, the node failure is “1” (node failure occurs ) (S4), and if yes (node failure occurred), it is determined that communication has been interrupted (S8). If NO in step S4, it is determined whether the loopback is “1” (during loopback operation) (S5 in FIG. 10), and it is determined as YES (during loopback operation) by referring to the current state management table. Then, it is determined whether the check order is counterclockwise (S6), and if it is determined that the answer is yes, it is determined that the communication is interrupted. If it is found in this step S6 that the check order is not counterclockwise (clockwise), the check order is counterclockwise, the extraction position is set as the starting node (S7 in FIG. 10), and the process proceeds to step S2. If the loopback is not “1” in S5, the process proceeds to Step S15 described later.
[0028]
If it is determined in step S3 that the node is not the start node, it is determined whether the node is the end node (S9 in FIG. 10). If the node is the end node, it is determined whether the node failure is “1” (S10). If “1”, the process proceeds to step S6 described above, and the process is executed. If the node failure is not “1”, it is determined that the communication is performed without any problem (S11). If it is determined in step S9 that the node is not the end node, it is determined whether the loopback is “1” (S12 in FIG. 10). If “1”, the process proceeds to S6. Is “1” (S13). If “1”, it is determined whether the bypass is “1” (S14). If the bypass is not “1”, the process proceeds to S6 described above. If the bypass is “1”, the process proceeds to S13 in S13 where the node failure is not “1”. Is taken out, and the process proceeds to S9.
[0029]
FIG. 11 is an explanatory diagram of a transmission line failure example 1. A. of FIG. Indicates the location of the failure. In this example, as shown in the figure, the transmission path between the clockwise transmission apparatuses B to C (transmission path having the start point as B and the end point as C) and the counterclockwise transmission apparatuses E to D This is a case where a failure occurs in the transmission line.
[0030]
B. of FIG. Is a flowchart of the current state management table update, and shows an example in which a failure between the transmission apparatuses B to C occurs first. First, since it is notified that a clockwise loopback has occurred in the transmission apparatus B, “1” is set in the clockwise loopback state of the transmission apparatus B (S1 in FIG. 11B), and then Is notified that a counterclockwise loopback has occurred in the transmission apparatus E, and therefore, “1” is set in the counterclockwise loopback state of the transmission apparatus E (S2). As a result, as shown in FIG. As shown in the updated current state management table, the clockwise loopback state of node B and the counterclockwise loopback state of node E are set to “1”, respectively.
[0031]
In FIG. When the failure determination process shown in FIG. 10 is performed on the current state management table shown in FIG. 10, it is determined that the communication between the transmission apparatuses A to D has been interrupted. According to the method of the conventional example 1 (FIG. 20), when a transmission alarm is detected by the transmission apparatus B or the transmission apparatus C, it is determined that a failure has occurred in the transmission path between B and C. When a reception alarm is detected by D or the transmission device E, it is determined that a failure has occurred between D and E, and a determination result similar to the present invention is obtained.
[0032]
Next, FIG. 12 is an explanatory diagram of a transmission path failure example 2. A. of FIG. Indicates a location where a failure has occurred. In this example, a failure occurs in a transmission path between clockwise transmission apparatuses B to C and a transmission path between clockwise transmission apparatuses D to E. B. of FIG. Is a flowchart of the current state management table update, and shows an example in which a failure between the transmission apparatuses B to C occurs first, and it is notified that a clockwise loopback has occurred in the transmission apparatus B. Is set to “1” in the clockwise loopback state (S1 in FIG. 12B), and then it is notified that a clockwise loopback has occurred in the transmission device D. Is set to "1" (S2). As a result, as shown in FIG. As shown in the updated current state management table, the clockwise loopback states of the nodes B and D are respectively set to “1”.
[0033]
In FIG. When the failure determination shown in FIG. 10 is performed on the current state management table shown in FIG. 10, it is determined that the communication between the transmission apparatuses A to D (between the transmission apparatus A and the transmission apparatus D) is executed without any problem. In the conventional method, it is determined that the communication between A and D is interrupted.
[0034]
Next, FIG. 13 is an explanatory diagram of a failure occurrence example 1 of the transmission apparatus. A. of FIG. Indicates a location where a failure has occurred. In this example, a failure occurs in the transmission device C and the transmission device E, and it is assumed that the bypass function operates in the transmission device C and the bypass function does not operate in the transmission device E. . B. of FIG. Is a flowchart for updating the current state management table, showing an example in which the failure of the transmission device C has occurred first, and is notified that a node failure and bypass operation have occurred in the transmission device C. And “1” is set in the bypass state (S1 of B. of FIG. 13), and it is notified that a node failure has occurred in the transmission device E, so “1” is set in the node failure of the transmission device E ( (S2). Subsequently, since it is notified that a clockwise loopback has occurred in the transmission apparatus D, “1” is set in the clockwise loopback state of the transmission apparatus D (S3 in FIG. 13B), and the transmission apparatus Since A is notified that a counterclockwise loopback has occurred, “1” is set to the counterclockwise loopback state of transmission apparatus A (FIG. S4).
[0035]
In FIG. When the failure determination shown in FIG. 10 is performed on the current state management table shown in FIG. 10, it is determined that the communication between the transmission apparatuses A to D is executed without any problem. In the method of Conventional Example 1, it is erroneously determined that communication between A to D has been interrupted.
[0036]
FIG. 14 and FIG. 15 are explanatory diagrams (part 1) and (part 2) of Example 1 in which the transmission apparatus is stopped in a pseudo manner, and predict the influence when the transmission apparatus is stopped by work instead of failure. . When making a prediction, the pseudo state management table is used.
[0037]
A. of FIG. Indicates the part to be stopped. In this example, the case where the transmission apparatus E is stopped is predicted. Based on the connection information table (FIG. 6), B. of FIG. Set the initial state of the pseudo-state management table shown in. Next, in FIG. The pseudo state management table update flowchart shown in FIG. Since the transmission device E is first stopped, the node failure (in the pseudo state management table) of the transmission device E is set to “1” (S1 in C. of FIG. 15), and the clockwise loopback is caused in the transmission device D. Therefore, “1” is set in the clockwise loopback state of the transmission apparatus D (S2), and further, a counterclockwise loopback occurs in the transmission apparatus A. Therefore, the counterclockwise loopback of the transmission apparatus A is generated. The state is set to “1” (S3).
[0038]
As a result, B. of FIG. The pseudo-state management table shown in FIG. Thus, the updated pseudo-state management table is obtained. Whether or not communication between any transmission apparatuses can be executed in a state where such a transmission apparatus E has a node failure, a counterclockwise loopback occurs in node A, and a clockwise loopback occurs in node D. The determination of D. of FIG. 10 can be performed according to the flowchart shown in FIG.
[0039]
FIGS. 16 and 17 are explanatory diagrams (part 1) and (part 2) of the second example in which the transmission apparatus is artificially stopped. This is because the transmission apparatus E is in a state where a failure occurs in the transmission apparatus C. It is an example which estimates the influence at the time of stopping.
[0040]
In the prediction in this case, the current state management table and the pseudo state management table are used.
[0041]
A. of FIG. Indicates a state in which a failure has occurred in the transmission apparatus C. B. of FIG. Is A. The present state management table showing the state of is shown. At this time, it is assumed that the clockwise and counterclockwise transmission paths at node C are in a bypass operation state, and are set in the current state management table.
[0042]
Here, in FIG. Assuming that the transmission device E is stopped by work such as inspection as shown in FIG. 3, if the transmission device A generates a counterclockwise loopback and the transmission device D generates a clockwise loopback, 17 D.E. A pseudo state management table is set as shown in FIG. Next, based on the current state management table (B in FIG. 16) and the pseudo state management table (D in FIG. 17), the logical sum of the node state, the clockwise rotation and the counterclockwise loopback state / bypass state is obtained. Is updated to the pseudo state management table. The update result is shown in E of FIG.
[0043]
The determination as to whether or not communication can be performed between any transmission apparatuses is as follows. The pseudo state management table shown in FIG.
[0044]
FIG. 18 shows the result of failure determination according to the present invention. A. of FIG. And B. Is an example of outputting the determination result as a character string. Indicates an example displayed on the display device, and displays “between A and D: some abnormality”, “normally clockwise”, “stopped counterclockwise”. B. in FIG. Is the content of printing by the printing device, and the content is the same as that of the display device. C. of FIG. Represents the output of the determination result by a figure, and the dotted line indicates that the counterclockwise rotation between the transmission apparatuses E to D is stopped.
[0045]
FIG. 19 is an explanatory diagram of a method for updating the pseudo state management table. A. of FIG. Is a method to update the table directly, with the pseudo state management table displayed on the display device, and setting the node failure, clockwise (or counterclockwise) loopback, and bypass corresponding to the corresponding node . Further, B. of FIG. Is a method for designating a stop point in the transmission path configuration diagram, and in this case also, a method for designating a stop point in a state where the configuration of the transmission path is displayed on the display device as shown in the figure.
[0046]
(Supplementary note 1) A fault monitoring system for a loop type transmission path having a plurality of transmission paths for connecting a plurality of transmission apparatuses in order, wherein the fault monitoring system includes a monitoring apparatus having a communication function with each transmission apparatus and a plurality of tables. A storage device for storing, and the monitoring device acquires connection information table creation means for creating and storing a connection information table for managing connection information of each transmission device, and obtained in response to a request for status information for each transmission device A current state management table creating means for creating a current state management table storing state information including the presence / absence of a failure of each transmission device, and communication between two specific transmission devices can be normally performed with respect to the state of the current state management table. A fault monitoring system for a loop type transmission line, comprising fault judging means for judging whether or not.
[0047]
(Supplementary note 2) In Supplementary note 1, information indicating whether or not each transmission device is in a loopback operation state is set in the current state management table, and the determination means makes a determination in consideration of the loopback operation state. A fault monitoring system for loop transmission lines.
[0048]
(Supplementary note 3) In Supplementary note 1 or 2, information is set as to whether or not a bypass function that normally performs data transmission via the transmission device is in operation even if a failure occurs in the transmission device, and the determination A fault monitoring system for a loop transmission line, wherein a determination is made by taking into account a bypass function.
[0049]
(Supplementary note 4) The fault type monitoring system for a loop type transmission line according to supplementary note 1, wherein the plurality of loop type transmission lines are provided in a clockwise direction and a counterclockwise direction.
[0050]
(Supplementary note 5) In any one of Supplementary notes 1 to 4, the current state in which a plurality of transmission devices connected to the loop transmission line or a selected one or a plurality of transmission lines are set to a state where they are stopped or faulted A pseudo state management table having the same configuration as the state management table is provided, and the state set in the pseudo state management table is determined by the failure determination means whether or not communication can be normally performed between two specific transmission apparatuses. Then, a fault monitoring system for a loop type transmission line, characterized by determining the influence of a fault in a pseudo state.
[0051]
(Additional remark 6) In additional remark 5, the result obtained by ORing each item of the pseudo state set in the pseudo state management table and the current state management table is set in the pseudo state management table, Determining whether or not communication can be normally performed between two specific transmission apparatuses when the transmission apparatus or the transmission line is assumed to be stopped with respect to the current state by the failure determination means with respect to the contents of the pseudo-state management table A fault monitoring system for loop type transmission lines characterized by
[0052]
【The invention's effect】
According to the present invention, it is possible to automatically and accurately determine whether to stop a loop transmission line. Furthermore, it is possible to make a stop determination without transmitting a monitoring frame on the LAN.
[Brief description of the drawings]
FIG. 1 is a diagram showing a principle configuration of the present invention.
FIG. 2 is a diagram showing a configuration example of a monitoring system according to the present invention.
FIG. 3 is a diagram illustrating an example of a data configuration of state information.
FIG. 4 is a diagram illustrating a configuration example of a plurality of sets of loop transmission lines.
FIG. 5 is a diagram illustrating a configuration example of connection information to be collected.
FIG. 6 is a diagram illustrating an example of a created connection information table.
FIG. 7 is a diagram showing a flowchart for creating a connection information table.
FIG. 8 is a diagram illustrating a flowchart for creating a current state management table.
FIG. 9 is a diagram illustrating an initial state of a current state management table.
FIG. 10 is a diagram illustrating a flowchart of failure determination.
FIG. 11 is an explanatory diagram of a transmission path failure example 1. FIG.
FIG. 12 is an explanatory diagram of a failure occurrence example 2 of a transmission path;
FIG. 13 is an explanatory diagram of a failure occurrence example 1 of the transmission apparatus;
FIG. 14 is an explanatory diagram (part 1) of Example 1 in which a transmission apparatus is stopped in a pseudo manner;
FIG. 15 is an explanatory diagram (part 2) of the first example in which the transmission apparatus is artificially stopped;
FIG. 16 is an explanatory diagram (part 1) of Example 2 in which a transmission apparatus is stopped in a pseudo manner;
FIG. 17 is an explanatory diagram (part 2) of the second example in which the transmission apparatus is pseudo-stopped;
FIG. 18 is a diagram illustrating an output of a result of failure determination according to the present invention.
FIG. 19 is an explanatory diagram of a pseudo-state management table update method.
FIG. 20 is an explanatory diagram of Conventional Example 1;
FIG. 21 is an explanatory diagram of Conventional Example 2;
[Explanation of symbols]
1 Monitoring device
10 processing section
10a Connection information table creation means
10b Current state management table creation means
10c Failure determination means
11 Memory unit
11a Connection information table
11b Current state management table
11c pseudo state management table
12 Input means
13 Output means
2 Transmission equipment
3 Status information collection device

Claims (2)

A loop type transmission line fault monitoring system comprising a plurality of transmission lines for sequentially connecting a plurality of transmission devices,
Fault monitoring system comprising a monitoring device including a storage device for storing a plurality of tables containing connection information table and the current state management table containing the connection order of the transmission apparatus and the identification information with a communication function with the respective transmission device,
The monitoring device includes connection information table creation means for obtaining connection information and identification information of each transmission device and creating and storing a connection information table, and each transmission device obtained in response to a request for status information for each transmission device. Current state management table creation means for creating a current state management table that stores information including all of the connection order, identification information, transmission device failure, loopback and bypass states corresponding to each transmission path, and constant A fault determination unit that determines which transmission device communication is stopped based on the current state management table when activated by a cycle or an instruction from an input unit. Fault monitoring system. In claim 1,
A pseudo state management table having the same configuration as the current state management table for setting a state in which a plurality of transmission apparatuses connected to the loop type transmission line or one or more selected among the transmission lines are stopped or faulted are assumed. Provided
A loop type characterized by determining which transmission device communication is stopped based on the failure determination means for the state set in the pseudo state management table and determining the influence of the failure in the pseudo state Transmission line failure monitoring system.

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