JP2007071573A - Optical fiber line automatic monitoring system and automatic monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber line automatic monitoring system capable of acquiring automatically obstacle generation information of an optical fiber in the optical fiber line, and performing an optical fiber test automatically. <P>SOLUTION: A network monitoring device 10 receives apparatus monitoring information of a light signal transmission device 4 from a monitor unit 5, determines an optical fiber line 1 and an optical fiber 3 wherein an obstacle is generated based on the apparatus monitoring information, and transmits obstacle generation information of the optical fiber 3 to the optical fiber line automatic monitoring system 20 as an alarm signal. In the optical fiber line automatic monitoring system 20, the optical fiber 3 which is a test object is selected (for example, by using an optical switch and a coupler filter) based on the obstacle generation information in the alarm signal received from the network monitoring device 10, and OTDR test is performed relative to the optical fiber 3 which is the test object, and an obstacle generation position in the optical fiber 3 is specified. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automatic optical fiber line monitoring system and an automatic monitoring method, which can greatly reduce the recovery time when a communication fault occurs in an optical fiber line.

  2. Description of the Related Art In recent years, with the spread of CATV (Cable Television) networks and the broadband use of the Internet, with the increase in communication speed and capacity, optical fiber line networks using optical fiber cables are becoming popular nationwide. For this reason, the importance of the monitoring system is increasing in order to maintain the reliability of the optical fiber line. Hereinafter, an example of a current optical fiber line monitoring system will be described.

  When a communication failure occurs in an optical fiber line network, an optical pulse test device is connected to the optical fiber line in which the failure has occurred from among optical repeater connection devices in which thousands of optical fibers are assembled, and OTDR (Optical By observing the waveform (Time Domain Reflector), the fault location and content of the optical fiber in the optical fiber line are searched (for example, refer to Patent Documents 1 and 2). In other words, the connection between the optical pulse test device and the optical fiber line to be monitored is made manually. However, since one OTDR measurement takes about 1 minute or more, it is necessary to shorten the time from the occurrence of the failure until the optical pulse test apparatus is connected to the optical fiber line in order to quickly deal with the failure. is there.

  Moreover, in the conventional optical fiber line monitoring system, the directional coupler connected to the optical fiber line and the test end of the OTDR are selectively connected by an automatic core switching device (mechanical optical switch). Has also been done.

  As an example, FIG. 6 shows a configuration example of an optical line monitoring system for monitoring a conventional optical fiber line. In the optical line monitoring system shown in FIG. 6, the management server 111 of the maintenance center 110 is connected to the optical line monitoring device 120 via the communication line 100 so that they can communicate with each other. The optical line monitoring device 120 is a device that automatically performs a test and a failure determination of the optical fiber 3 in the optical fiber line 1 to be tested. The optical line monitoring device 120 includes the entire optical line monitoring device 120. A controller 121 to be controlled, an OTDR test apparatus (including a light source) 122 that performs optical fiber loss measurement and failure and fault location detection using back-scattered light, and an optical switch (optical SW) that switches the optical fiber to be tested ) 123 and a coupler filter 124 for injecting a test light pulse for the OTDR test. Therefore, if the optical line monitoring device 120 shown in FIG. 6 is used, the time from the occurrence of a fault in the optical fiber line 1 to the search for the fault position of the optical fiber 3 is considerably shortened. It is desirable to shorten the time to start.

  On the other hand, broadband has a function of using a status monitoring device (network monitoring device) for monitoring the line status and outputting an automatic alarm when a communication failure occurs by constantly grasping the communication state. In addition, many CATV systems nationwide have HFC systems that use an optical fiber line as a trunk line and a coaxial cable as a part of a user terminal. Such a CATV system automatically generates an alarm signal from a status monitor device when a failure occurs.

For example, as shown in the configuration example of the CATV network in FIG. 7, the CATV network 210 includes an optical fiber line network 6 and a coaxial network 211, and an image signal transmitted from the broadcast wave transmission device 201 of the CATV center 200 is Through the head end 203, the light is delivered to each home 204 through the optical fiber line 1 in the optical fiber line network 6, the optical signal transmission device 4 such as a relay amplifier, and the coaxial network 211. Also, some (or all) of the optical signal transmission devices 4 are equipped with monitor units 5. The monitor unit 5, for example, the received signal level and the operating state in the optical signal transmission device 4 are measured and transmitted to the status monitor device 202 as device monitoring information. The status monitor device 202 displays an operation state of the optical signal transmission device 4 on a monitor screen of a display unit (not shown) and determines whether or not an abnormality has occurred in the optical fiber line 1. An alarm signal is automatically generated from the status monitor device 202 when a failure occurs in the optical fiber line 1.
JP 2000-321170 A Japanese Patent No. 3585680

As described above, in the conventional technology, the optical line monitoring device using OTDR for monitoring the optical fiber line and the status monitoring device used for monitoring the CATV network or the like are independent systems.
The status monitor device can monitor whether or not a communication failure has occurred on the optical fiber line between the CATV center station and the monitor unit, but the failure is caused by an optical signal transmission device (for example, a relay amplifier, an optical signal transmission relay device, Whether it is due to a power supply device or the like or an optical fiber line cannot be identified. On the other hand, in the optical line monitoring system, it is possible to find a failure occurring in the optical fiber of the optical fiber line, but there is a problem that it takes a certain amount of time to measure.

  The present invention has been made to solve such a problem, and an object of the present invention is to obtain information on the occurrence of a failure in an optical fiber line and test the optical fiber line to thereby provide an optical fiber in the optical fiber line. It is an object of the present invention to provide an optical fiber line automatic monitoring system and an automatic monitoring method that can quickly identify the position where a failure occurs.

In order to solve the above problems, an optical fiber line automatic monitoring system of the present invention selects an optical fiber in an optical fiber line, injects a test optical pulse into the selected optical fiber, and observes an OTDR waveform. An optical fiber line automatic monitoring system for determining a failure position by an alarm signal receiving unit for receiving information on a failed optical fiber as an alarm signal from a network monitoring device for detecting a communication error, and receiving the alarm signal A test target optical fiber selection unit that identifies an optical fiber in which an abnormality has occurred and selects a test target optical fiber based on the failure occurrence information included in the alarm signal received by the unit, and the test target optical fiber selection unit. An optical fiber test section for injecting a test optical pulse into the selected optical fiber and observing an OTDR waveform; Based on the test results by the optical fiber test portion, characterized in that it comprises a determining optical fiber failure location determination unit failure occurrence position of the optical fiber.
With such a configuration, the optical fiber line automatic monitoring system receives, as an alarm signal, failure occurrence information of the optical fiber (optical fiber core wire) of the optical fiber line from the network monitoring device. Then, based on the failure occurrence information included in the alarm signal, an optical fiber to be tested is selected (for example, an optical switch is used). Then, an OTDR test is performed on the optical fiber to be tested, and the failure occurrence position of the optical fiber is specified.
Thereby, the abnormality information of the optical fiber detected on the network monitoring device side can be used on the optical fiber line automatic monitoring system side, and the failure occurrence position of the optical fiber in which the failure has occurred can be quickly identified.

Further, in the optical fiber line automatic monitoring system of the present invention, the network monitoring device is installed in a predetermined optical signal transmission device in the optical fiber line network, and a monitor unit that monitors the device operation state in the optical signal transmission device, A monitor unit signal receiving unit for receiving device monitoring information of the optical signal transmission device, and an optical fiber line using, as an alarm signal, information on a communication network determined to be abnormal based on the device monitoring information received by the monitor unit signal receiving unit And an alarm signal transmitter for transmitting to the automatic monitoring system.
With such a configuration, a monitor unit is installed in an optical signal transmission apparatus (for example, a relay amplifier in a CATV network, a router in a TCP / IP network, etc.), and the signal reception level and operating state of the optical signal transmission apparatus are monitored. To do. The network monitoring device receives device monitoring information from the monitor unit, determines a faulty optical fiber based on the device monitoring information, and sends an alarm signal including the fault occurrence information of the optical fiber to the optical fiber line automatic monitoring system Send to.
Thereby, the abnormality information of the optical fiber detected on the network monitoring device side can be used on the optical fiber line automatic monitoring system side, and the failure occurrence position of the optical fiber in which the failure has occurred can be quickly identified.

In the optical fiber line automatic monitoring system of the present invention, the fault position is determined by selecting an optical fiber in the optical fiber line, injecting a test optical pulse into the selected optical fiber, and observing the OTDR waveform. An optical fiber line automatic monitoring system, which is installed in a predetermined optical signal transmission device in an optical fiber line network, and monitors equipment operation status in the optical signal transmission device, and device monitoring information of the optical signal transmission device The monitor unit signal receiving unit that receives the error, the optical fiber abnormality determining unit that determines the failed optical fiber based on the device monitoring information received by the monitor unit signal receiving unit, and the optical fiber abnormality determining unit A test target optical fiber selecting unit that selects the optical fiber determined as the test target optical fiber, and the test target optical fiber. An optical fiber test unit that injects a test optical pulse into the optical fiber selected by the Iber selection unit and observes the OTDR waveform, and the failure occurrence position of the optical fiber is determined based on the test result of the optical fiber test unit. And an optical fiber fault position determination unit.
With such a configuration, the signal reception level and equipment in the optical signal transmission apparatus can be obtained by the monitor unit installed in the optical signal transmission apparatus of the optical fiber line (for example, the relay amplifier of the CATV network or the router of the TCP / IP network). The operating state and the like are monitored, and device monitoring information from the monitor unit is received by the optical fiber line automatic monitoring system. In the optical fiber line automatic monitoring system, a faulty optical fiber is determined based on device monitoring information received from the monitor unit, and an optical fiber to be tested is selected (for example, using an optical switch). Then, an OTDR test is performed on the optical fiber to be tested, and the failure occurrence position of the optical fiber is specified.
Thereby, the device monitoring information of the monitor unit can be taken in by the optical fiber line automatic monitoring system itself, and the function of the network monitoring device can be realized by the optical fiber line automatic monitoring system. For this reason, the failure occurrence position of the optical fiber in which the failure has occurred can be quickly identified.

  The optical fiber line automatic monitoring system of the present invention is characterized by comprising a test result display unit for displaying the test result of the optical fiber on a monitor screen of the display unit. Thereby, when a failure occurs in the optical fiber, the failure occurrence status can be easily grasped by looking at the monitor screen.

  Further, the optical fiber line automatic monitoring system of the present invention comprises an abnormality occurrence position display unit for determining a failure position from the test result of the optical fiber and displaying the abnormality location on a monitor screen of the display unit. Features. As a result, when a failure occurs in the optical fiber, the failure occurrence status and the failure occurrence position can be easily grasped by looking at the monitor screen.

Further, the automatic monitoring method for an optical fiber line according to the present invention determines an obstacle position by selecting an optical fiber in the optical fiber line, injecting a test optical pulse into the selected optical fiber, and observing an OTDR waveform. An optical fiber line automatic monitoring method in an optical fiber line automatic monitoring system, comprising: a network monitoring device that detects a failure of an optical fiber in an optical fiber line by a control unit in the optical fiber line automatic monitoring system; An alarm signal receiving procedure for receiving information on an optical fiber in which a failure has occurred as an alarm signal, and identifying an optical fiber in which an abnormality has occurred based on the failure occurrence information included in the alarm signal received by the alarm signal receiving procedure, A test optical fiber selection procedure for selecting a test optical fiber, and the test optical fiber selection procedure An optical fiber test procedure for injecting a test optical pulse and observing an OTDR waveform to the optical fiber selected by the above, and an optical fiber for determining a failure occurrence position of the optical fiber based on the test result of the optical fiber test procedure A fault location determination procedure is performed.
By such a procedure, the optical fiber line automatic monitoring system receives, as an alarm signal, failure occurrence information of the optical fiber (optical fiber core wire) of the optical fiber line from the network monitoring device. Then, based on the failure occurrence information included in the alarm signal, an optical fiber to be tested is selected (for example, an optical switch is used). Then, an OTDR test is performed on the optical fiber to be tested, and the failure occurrence position of the optical fiber is specified.
Thereby, the abnormality information of the optical fiber detected on the network monitoring device side can be used on the optical fiber line automatic monitoring system side, and the failure occurrence position of the optical fiber in which the failure has occurred can be quickly identified.

In the present invention, the optical fiber line automatic monitoring system receives the failure occurrence information of the optical fiber detected on the network monitoring device side, and automatically tests the failed optical fiber. It is possible to quickly identify the position where an optical fiber failure occurs.
In addition, the function of the network monitoring device can be controlled by the optical fiber line automatic monitoring system itself taking in the failure occurrence information from the optical signal transmission device (for example, a CATV network relay amplifier, a TCP / IP network router). It can be realized by an automatic monitoring system.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a diagram for explaining an outline of an optical fiber line automatic monitoring system according to the present invention. In FIG. 1, an optical fiber line 1 is a communication path composed of one or a plurality of optical fiber cables 2, and a plurality of optical fibers (optical fiber cores) 3 are accommodated in the optical fiber cable 2. The optical fiber line 1 is connected to an optical signal transmission device 4 such as a relay amplifier in a CATV network or a router in a TCP / IP network, for example, and uses a CATV video signal or a digital packet signal as an optical signal. To transmit. The optical signal transmission device 4 is provided with a monitor unit 5 for monitoring the received signal level in the optical signal transmission device 4 and the operation state of the device.
Here, in the present invention, the optical fiber line means an optical communication path using one or more optical fiber cables, and the optical fiber means an optical fiber core wire in the optical fiber cable. The line network means an optical communication network composed of optical fiber lines.

  The measurement / monitoring signal in the monitor unit 5 is transmitted to the network monitoring apparatus 10 as device monitoring information. The network monitoring device 10 always determines whether or not a failure has occurred in the optical signal transmission device 4 and the optical fiber line 1 based on the device monitoring signal received from the monitor unit 5.

When a failure occurs in the optical fiber 3 of the optical fiber line 1, an abnormality occurs in the signal level of the optical signal transmission device 4, and this information is transmitted to the network monitoring device 10 through the monitor unit 5. The network monitoring device 10 detects a communication error and detects that a failure has occurred in the optical fiber 3 of the optical fiber line 1. Then, the fact that an abnormality has occurred in the optical fiber 3 is transmitted to the optical fiber line automatic monitoring system 20 as alarm information together with information for specifying the optical fiber 3 in which the abnormality has occurred.
When the alarm signal is transmitted from the network monitoring device 10 to the optical fiber line automatic monitoring system 20 via a TCP / IP network router, a trap (trap) of SNMP (Simple Network Management Protocol) is used. ) To send an alarm signal.

When receiving the alarm signal from the network monitoring device 10, the optical fiber line automatic monitoring system 20 selects the optical fiber 3 specified by the failure occurrence information in the alarm signal from the optical fiber cable 2, performs a test by OTDR, The failure occurrence position of the fiber 3 is determined. Test information of the optical fiber 3 by OTDR is displayed on the monitor screen of the display unit 22. In addition, the information on the location where the optical fiber has failed can be displayed on a map on the monitor screen.
In this way, in the optical fiber line automatic monitoring system 20 of the present invention, the alarm information (failure occurrence information) of the optical fiber line 1 and the optical fiber 3 detected by the network monitoring device 10 is transmitted to the optical fiber line automatic monitoring system 20 side. By automatically testing the optical fiber 3 in which a failure has occurred, it is possible to quickly identify the range in which the failure has occurred.

  In the example illustrated in FIG. 1, the network monitoring device 10 receives the device monitoring information from the monitor unit 5 of the optical signal transmission device 4 and determines the optical fiber 3 in which the failure has occurred. The optical fiber line automatic monitoring system 20 itself may receive device monitoring information from the monitor unit 5 and determine the optical fiber 3 in which a failure has occurred.

FIG. 2 is a diagram showing a configuration example of the optical fiber line automatic monitoring system according to the present invention, showing a configuration example of the optical fiber line automatic monitoring system 20 together with a configuration example of the network monitoring device 10, Moreover, only the part directly related to the present invention is shown.
In the configuration example shown in FIG. 2, the network monitoring apparatus 10 and the optical fiber line automatic monitoring system 20 are communicatively connected via a communication line (dedicated line, ISDN line, etc.) 7 and a router 8. Alarm information is transmitted from 10 to the optical fiber line automatic monitoring system 20.

  The network monitoring device 10 includes a control unit (including a CPU) 11 and a processing program unit 12 that collectively control the entire network monitoring device 10. The monitor unit signal receiving unit 13 in the network monitoring device 10 performs processing for receiving device monitoring information from the monitor unit 5 installed in the optical signal transmission device 4 in the optical fiber line network 6. The alarm signal transmission unit 15 uses the failure occurrence information of the communication network (for example, the optical fiber 3 in the optical fiber line 1) determined to be abnormal based on the device monitoring information received by the monitor unit signal reception unit 13 as an alarm signal. Processing to transmit to the fiber line automatic monitoring system.

  The optical fiber line automatic monitoring system 20 includes a control unit (including a CPU) 21 that performs overall control of the entire optical fiber line automatic monitoring system 20, a display unit 22, a processing program unit 30, and a database 40. Yes. The alarm signal receiving unit 31 in the processing program unit 30 performs a process of receiving, as an alarm signal, failure occurrence information of the optical fiber 3 in which an abnormality has occurred from the network monitoring device 10. When the alarm signal reception unit 31 receives an alarm signal, the test target optical fiber selection unit 32 selects the optical fiber 3 in which an abnormality has occurred as an optical fiber to be tested. For example, an optical switch (for example, see the optical switch 123 shown in FIG. 6) is controlled, and the optical fiber 3 to be tested is selected.

  The optical fiber test unit 33 performs a process for injecting a test optical pulse and observing the OTDR waveform to the optical fiber 3 selected by the test target optical fiber selection unit 32. The optical fiber fault position determination unit 34 determines the fault position of the optical fiber 3 based on the test result by the optical fiber test unit 33. The test result display unit 35 displays the OTDR test result for the optical fiber 3 on the monitor screen of the display unit 22. The abnormality occurrence position display unit 36 determines a failure occurrence position from the OTDR test result of the optical fiber 3 and displays a map of the position where the failure has occurred on the monitor screen of the display unit 22. For example, the route of the optical fiber line and the position where the failure has occurred are displayed on the map. Also, the current state photo information of the position can be displayed. In addition, the information on the position where the failure has occurred can be transmitted to another communication terminal (for example, a cellular phone of a maintenance worker).

  When the database 40 displays the optical fiber line management information such as the route information of the optical fiber line 1 in the optical fiber line network 6 and the path of the optical fiber line 1 and the failure occurrence position of the optical fiber 3 on the map on the monitor screen. The map information etc. used for is recorded.

  In the configuration example illustrated in FIG. 2, the network monitoring device 10 receives the device monitoring information from the monitor unit 5 of the optical signal transmission device 4 and determines the optical fiber 3 in which the failure has occurred. However, the function of the network monitoring device 10 is taken into the optical fiber line automatic monitoring system 20, and the optical fiber line automatic monitoring system 20 itself receives the device monitoring information from the monitor unit 5, and determines the optical fiber 3 in which the failure has occurred. You may make it do. A configuration example in this case will be described next.

  FIG. 3 is a diagram showing another example of the configuration of the optical fiber line automatic monitoring system 20, and incorporates the function of the network monitoring apparatus 10 shown in FIG. 2 into the processing program unit 30A in the optical fiber line automatic monitoring system 20A. An example configuration is shown.

  That is, the processing program unit 30A in the optical fiber line automatic monitoring system 20A shown in FIG. 3 has a configuration in which the monitor unit signal receiving unit 13 is added and the alarm signal receiving unit 31 (see FIG. 2) is removed. . The operation of each unit is the same as that of each processing unit indicated by the same reference numeral in FIG.

  FIG. 4 is a flowchart showing the flow of processing in the automatic optical fiber line monitoring system of the present invention, and shows the flow of processing in the automatic optical fiber line monitoring system 20 shown in FIG. Hereinafter, the flow of the process will be described with reference to FIG.

On the network monitoring device 10 side, device monitoring information of the optical signal transmission device 4 such as a relay amplifier or a relay connection device is received from each monitor unit 5 in the optical fiber line network 6 (step S11).
Then, based on the device monitoring information received from the monitor unit 5, the occurrence of a failure is detected (step S12), and information on the optical fiber 3 in which the failure has occurred is used as an alarm signal for the automatic optical fiber line monitoring system 20 (Step S15).

  On the other hand, on the optical fiber line automatic monitoring system 20 side, an alarm signal is received from the network monitoring device 10 (step S21). The alarm signal from the network monitoring device 10 may be received by making an alarm signal transmission request from the optical fiber line automatic monitoring system 20 to the network monitoring device 10.

  Then, based on the failure occurrence information included in the alarm signal, the failed optical fiber 3 is identified (step S22), the identified optical fiber 3 is selected as a test target (step S23), and a test (measurement) is performed using OTDR. (Step S24).

  Then, based on the test result by OTDR, the failure occurrence position in the optical fiber 3 is determined (step S25), and the test result is output (step S26). In addition to displaying the test result on the monitor screen of the display unit 22, the test result may be transmitted to another terminal (for example, a portable communication terminal held by a maintenance worker).

  FIG. 5 is a diagram showing a processing procedure of the optical fiber line automatic monitoring system 20A shown in FIG. 3, and a processing procedure on the network monitoring apparatus 10 side shown in FIG. 4 and a processing on the optical fiber line automatic monitoring system 20 side. It becomes a processing procedure that combines the procedure. Hereinafter, the flow of the processing will be described with reference to FIG.

In the optical fiber line automatic monitoring system 20A, the equipment monitoring information of the optical signal transmission device 4 is received from each monitor unit 5 in the optical fiber line network 6 (step S31).
Then, based on the device monitoring information received from the monitor unit 5, the occurrence of a failure is detected (step S32), and it is determined whether or not a failure has occurred in the optical fiber line 1 (step S33). If it is determined in step S33 that a failure has occurred in the optical fiber line 1, the optical fiber 3 in which the failure has occurred is determined (step S34). Then, the specified optical fiber 3 is selected as a test target (step S35), and a test (measurement) is performed by OTDR (step S36).

  Then, based on the test result by OTDR, the failure occurrence position is determined (step S37), and the test result is output (step S38). In addition to displaying the test result on the monitor screen of the display unit 22, the test result may be transmitted to another terminal (for example, a portable communication terminal held by a maintenance worker).

As mentioned above, although embodiment of this invention was described, the optical fiber line automatic monitoring system 20 by this invention has a computer system inside. A series of processes related to the above-described process is stored in a computer-readable recording medium in the form of a program, and the above-described process is performed by the computer reading and executing this program. That is, in the optical fiber line automatic monitoring system 20, each processing is performed by a central processing unit such as a CPU reading the above program into a main storage device such as a ROM or RAM, and processing information and executing processing. It is realized.
Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  As mentioned above, although embodiment of this invention was described, the optical fiber track | line automatic monitoring system of this invention is not limited only to the above-mentioned illustration example, In the range which does not deviate from the summary of this invention, various changes are carried out. Of course, it can be added.

  In the present invention, the failure occurrence information of an optical fiber is automatically identified by using the failure occurrence information of the optical fiber detected by the network monitoring device, and the failure occurrence position of the optical fiber is quickly identified. Therefore, the present invention is useful for an optical fiber line automatic monitoring system, an automatic monitoring method, and the like.

It is a figure for demonstrating the outline | summary of the optical fiber line automatic monitoring system by this invention. It is a figure which shows the structural example of the optical fiber line automatic monitoring system by this invention. It is a figure which shows the other structural example of the optical fiber line automatic monitoring system by this invention. It is a flowchart which shows the flow of a process in the optical fiber line automatic monitoring system shown in FIG. It is a flowchart which shows the flow of a process in the optical fiber line automatic monitoring system shown in FIG. It is a figure which shows the structural example of the optical line monitoring system which monitors the conventional optical fiber line. It is a figure which shows the structural example of a CATV network.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical fiber line, 2 ... Optical fiber cable, 3 ... Optical fiber, 4 ... Optical signal transmission apparatus, 5 ... Monitor unit, 6 ... Optical fiber line network, 7 ..Communication line, 8 ... router, 10 ... network monitoring device, 11 ... control unit, 12 ... processing program unit, 13 ... monitor unit signal receiving unit, 15 ... alarm signal Transmission unit 20, 20A ... optical fiber line automatic monitoring system, 21 ... control unit, 22 ... display unit, 30, 30A ... processing program unit, 31 ... alarm signal receiving unit, 32 ... optical fiber selection unit for test, 33 ... optical fiber test unit, 34 ... optical fiber fault position determination unit, 35 ... test result display unit, 36 ... abnormality occurrence position display unit, 40 ... Database, 100 ... Communication line 110 ... maintenance center, 111 ... management server, 120 ... optical line monitoring device, 121 ... controller, 122 ... OTDR test device, 123 ... optical switch, 124 ... Coupler filter, 200 ... CATV center, 201 ... broadcast wave transmission device, 202 ... status monitor device, 203 ... head end, 210 ... CATV network, 211 ... coaxial network

Claims (6)

An optical fiber line automatic monitoring system that selects an optical fiber (3) in the optical fiber line (1), injects a test optical pulse into the selected optical fiber, and observes an OTDR waveform to determine a fault location ( 20)
An alarm signal receiving unit (31) for receiving information on a failed optical fiber as an alarm signal from a network monitoring device (10) for detecting a communication error;
A test-target optical fiber selection unit (32) that identifies an optical fiber in which an abnormality has occurred and selects a test-target optical fiber based on failure occurrence information included in the alarm signal received by the alarm signal reception unit;
An optical fiber test unit (33) for injecting a test optical pulse into an optical fiber selected by the test optical fiber selection unit and observing an OTDR waveform;
An optical fiber line automatic monitoring system comprising: an optical fiber fault position determination unit (34) for determining a fault occurrence position of the optical fiber based on a test result by the optical fiber test unit. The network monitoring device
A monitor that receives equipment monitoring information of the optical signal transmission device from a monitor unit (5) that is installed in a predetermined optical signal transmission device (4) in the optical fiber line network and monitors the device operating state in the optical signal transmission device. A unit signal receiver (13);
An alarm signal transmission unit (15) for transmitting information on a communication network determined to be abnormal based on device monitoring information received by the monitor unit signal receiving unit to the optical fiber line automatic monitoring system as an alarm signal. The optical fiber line automatic monitoring system according to claim 1. An optical fiber line automatic monitoring system for selecting an optical fiber in an optical fiber line, injecting a test optical pulse into the selected optical fiber, and observing an OTDR waveform to determine a fault location,
A monitor unit signal receiving unit that receives equipment monitoring information of the optical signal transmission device from a monitor unit that is installed in a predetermined optical signal transmission device in the optical fiber line network and monitors the device operating state in the optical signal transmission device;
Based on the device monitoring information received by the monitor unit signal receiving unit, an optical fiber abnormality determining unit that determines an optical fiber in which a failure has occurred,
A test optical fiber selection unit that selects an optical fiber determined to be abnormal by the optical fiber abnormality determination unit as a test optical fiber;
An optical fiber test unit for injecting a test optical pulse and observing an OTDR waveform with respect to the optical fiber selected by the test optical fiber selection unit;
An optical fiber line automatic monitoring system comprising: an optical fiber fault position determination unit that determines a fault occurrence position of an optical fiber based on a test result by the optical fiber test unit. The optical fiber line automatic monitoring system according to any one of claims 1 to 3, further comprising a test result display unit (35) for displaying the test result of the optical fiber on a monitor screen of the display unit (22). . The abnormality occurrence position display unit (36) for determining a failure position from the test result of the optical fiber and displaying the abnormality location on a monitor screen of the display unit is provided. An optical fiber line automatic monitoring system according to claim 1. Automatic monitoring of an optical fiber line in an optical fiber line automatic monitoring system that selects an optical fiber in an optical fiber line, injects a test optical pulse into the selected optical fiber, and observes an OTDR waveform to determine a fault location A method,
By the control unit (21) in the optical fiber line automatic monitoring system,
An alarm signal receiving procedure for receiving information on an optical fiber in which an error has occurred as an alarm signal from a network monitoring device that detects the occurrence of an optical fiber failure in the optical fiber line;
Based on the failure occurrence information included in the alarm signal received by the alarm signal reception procedure, the optical fiber in which an abnormality has occurred is identified, and the test target optical fiber selection procedure for selecting the test target optical fiber;
An optical fiber test procedure for injecting a test optical pulse and observing an OTDR waveform for the optical fiber selected by the test optical fiber selection procedure;
An optical fiber line automatic monitoring method comprising: an optical fiber fault position determination procedure for determining a fault occurrence position of an optical fiber based on a test result obtained by the optical fiber test procedure.

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