JP2014003551A - Alarm mask setting method for network management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for identifying an alarm caused by maintenance work, by setting a mask for alarms including a communication service alarm when maintenance work is performed in all routes in a network having a redundant route.SOLUTION: A method comprises: a step in which a mask generation unit generates a first alarm mask which is to be applied to a first route and includes an alarm for communication service and a second alarm mask which is to be applied to a second route and includes the alarm for the communication service on the basis of information on maintenance work for the first and second routes accepted by a work registration unit; a step in which a control unit determines a route where maintenance work is performed of the first and second routes; and a step in which a monitoring unit sets the first alarm mask to the first route and the second alarm mask to the second route when it is determined that the maintenance work is performed in both of the first and second routes.

Description

  The present invention relates to a method of setting an alarm mask by a device that manages a network having a redundant configuration, and a network management device thereof.

  In order to provide a communication service to an end user as usual even when one communication route cannot be used due to a failure or maintenance work, a communication carrier constructs a network having a redundant configuration. An exemplary network configuration diagram 100 of such a network is shown in FIG. In the example shown in FIG. 1, the communication devices are connected in a loop shape across a plurality of cities (Osaka 110, Nagoya 120, Shizuoka 130, Tokyo 140, Kanazawa 150, Nagano 160). A communication service 170 is provided between the communication device 111 installed in Osaka 110 and the communication device 145 installed in Tokyo 140. The communication service 170 includes the A route via each communication device shown in the upper part of FIG. 1 and installed in Nagoya 120 and Shizuoka 130, and each communication installed in the Kanazawa 150 and Nagano 160 shown in the lower part of FIG. And a redundant network having a B route via the device. In the specification of the present application, the communication service represents, for example, a communication service provided between the communication device 111 and the communication device 145 in the example of FIG.

  A telecommunications carrier manages a network as shown in FIG. 1 using a network management system (NMS). An exemplary functional block diagram of such an NMS 200 is shown in FIG. In the example illustrated in FIG. 2, the NMS 200 includes a configuration management unit 210 that manages a network configuration, a work management unit 220 that manages maintenance work performed by a communication carrier, and a monitor that monitors a failure that occurs in each communication device in the network. Unit 230 and a user interface 240 with a user such as a communication carrier.

  The configuration management unit 210 has a network configuration database 212 that stores information related to the network configuration. The work management unit 220 includes a work database 222 that stores information related to maintenance work, and an alarm mask database 224 that stores generated alarm masks. The monitoring unit 230 includes an alarm database 232 that stores information related to an alarm indicating a failure that has occurred in each communication device in the network, and an alarm mask database 234 that stores an alarm mask that is actually applied to the network. The alarm mask stored in the alarm mask database 234 is a copy of a part or all of the alarm mask stored in the alarm mask database 224.

  A case where maintenance work is performed in the network 100 as shown in FIG. 1 will be described in conjunction with the operation of the NMS 200 as shown in FIG. 2 with reference to FIG. FIG. 3 shows a time chart 300 of a conventional network maintenance method. The user registers the network configuration shown in FIG. 1 in the configuration management unit 210 of the NMS 200 in advance, and the registered information is stored in the network configuration database 212.

  At time T <b> 301 in FIG. 3, the user registers information related to the maintenance work for the A route (FIG. 1) in the work management unit 220. The information related to the maintenance work includes the start date and time and end date and time of the maintenance work, the communication device and equipment to be stopped, and the like. Information regarding the registered maintenance work is stored in the work database 222.

  The work management unit 220 generates an alarm mask to be applied to the A route based on the information regarding the maintenance work of the A route. While the maintenance work is being performed on the A route, the communication service 170 is provided between the communication apparatuses 111 and 145 via the B route as usual. That is, since the maintenance work performed on the A route does not affect the communication service 170 provided between the end and end, the alarm mask generated to be applied to the A route relates to the communication service 170. Does not include alarms.

  At time T302, the user registers information related to the maintenance work for the B route (FIG. 1) in the work management unit 220. The information related to the maintenance work includes the start date and time and end date and time of the maintenance work, the communication device and equipment to be stopped, and the like. Information regarding the registered maintenance work is stored in the work database 222.

  The work management unit 220 generates an alarm mask to be applied to the B route based on information regarding the maintenance work of the B route. While maintenance work is being performed on the B route, the communication service 170 is provided between the communication apparatuses 111 and 145 via the A route as usual. That is, since the maintenance work performed on the B route does not affect the communication service 170 provided between the end and end, the alarm mask generated to be applied to the B route is related to the communication service 170. Does not include alarms.

  The alarm masks generated at times T301 and T302 are stored in the alarm mask database 224.

  At time T303, the communication carrier starts maintenance work for the A route registered at time T301. For example, when a worker in Osaka 110 receives a notification that maintenance work will be started in Nagoya 120, the alarm to be applied to the A route generated at time T301 stored in the alarm mask database 224 by the NMS 200. The mask is copied to the alarm mask database 234 in the monitoring unit 230. As a result, the alarm mask generated at time T301 is applied to the A route.

  The alarm mask for route A applied at time T303 is valid until the maintenance work for route A ends at time T305. That is, at time T305, when a worker in Osaka 110 receives a notification that maintenance work has been completed in Nagoya 120, the alarm mask copied to the alarm mask database 234 at time T303 and applied to the route A at NMS200. Is deleted. By doing so, the alarm mask applied to the route A at time T303 is released.

  From time T303 to time T305, maintenance work is being performed on the A route, as indicated by a solid line in FIG. 3 as "A route work". During this time, when an alarm (alarm) indicating that a failure has occurred is notified from the communication device of the A route, the monitoring unit 230 checks whether the same alarm as the notified alarm is included in the alarm mask. When the same alarm is found, the monitoring unit 230 also displays that the alarm is due to maintenance work when displaying the alarm notified through the user interface 240.

  In FIG. 3, while the maintenance work is being performed on the A route, the maintenance work on the B route is also started at time T304. As in the case of the A route, the alarm mask to be applied to the B route generated at the time T302 stored in the alarm mask database 224 is copied to the alarm mask database 234 in the monitoring unit 230. By doing so, the alarm mask generated at time T302 is applied to the B route.

  The alarm mask for the B route applied at time T304 is valid until the maintenance work for the B route is completed at time T306. That is, at time T306, the alarm mask copied to the alarm mask database 234 at time T304 and applied to the B route is deleted. By doing so, the alarm mask applied to the B route at time T304 is released.

  From time T304 to time T306, maintenance work is being performed on the B route as indicated by a solid line in FIG. 3 as "B route work". During this time, when an alarm (warning) indicating that a failure has occurred is notified from the communication device of the B route, the monitoring unit 230 checks whether or not the same alarm as the notified alarm is included in the alarm mask. When the same alarm is found, the monitoring unit 230 also displays that the alarm is due to maintenance work when displaying the alarm notified through the user interface 240.

  FIG. 4 shows a flowchart of the conventional maintenance method described above. The method begins at step 402. In step 404, an alarm mask that does not include an alarm for the communication service is generated (corresponding to times T301 and T302 in FIG. 3). In step 406, maintenance work is started (corresponding to times T303 and T304 in FIG. 3). In step 408, the alarm mask generated in step 404 is applied to route A or route B (corresponding to times T303 and T304 in FIG. 3). In step 410, the maintenance work ends (corresponding to times T305 and T306 in FIG. 3). In step 412, the alarm mask applied in step 408 is canceled (corresponding to times T305 and T306 in FIG. 3).

  With reference to FIG. 5, the alarm mask produced | generated at the above-mentioned time T301, T302 is demonstrated. FIG. 5 shows an example of a network configuration diagram in which a conventional network maintenance method is used. FIG. 5 is a simplified diagram of the network configuration of FIG. A station 510 and B station 520 correspond to Osaka 110 and Tokyo 140 in FIG.

  Maintenance work is scheduled from 10:00 (start time) to 12:00 (end time) in the communication device 523 installed in the B station 520 and included in the A route. Due to this maintenance work, it is expected that the monitoring unit 230 of the NMS 200 is notified from the communication device 523 of an alarm indicating a transmission abnormality, a reception abnormality, a power supply abnormality, or the like. Although not shown, an alarm indicating a reception abnormality will be notified from the communication devices 522 and 513 adjacent to the communication device 523. Further, an alarm indicating that the A route is interrupted will be notified from the communication devices 522 and 512. These expected alarms are included in the alarm mask to be applied to the A route generated at the above-described time T301.

  On the other hand, in FIG. 5, the communication device 514 installed in the A station included in the B route is out of order at 11:00 to 11:30 during the maintenance work of the A route. Due to this failure, the monitoring unit 230 of the NMS 200 will be notified from the communication device 514 of an alarm indicating a transmission abnormality, a reception abnormality, a power supply abnormality, or the like. Although not shown, an alarm indicating reception abnormality will be notified from the communication devices 512 and 524 adjacent to the communication device 514. Further, an alarm indicating that the B route is disconnected will be notified from the communication devices 522 and 512. During the failure of the communication device 514, maintenance work is being performed on the A route. Therefore, the communication devices 511 and 521 at the end of the A and B routes notify the alarm indicating that the A and B routes are disconnected (both routes are disconnected). Will be done. These alarms due to the failure of the communication device 514 are not included in the alarm mask to be applied to the B route generated at the above-described time T302.

  The state of the network as shown in FIG. FIG. 6 shows a log display screen when the mask setting does not include a communication service alarm in the configuration of FIG. The log display screen is displayed on the monitor of the user interface 240 shown in FIG.

  Line number (#) 1 indicates that a power failure occurred at 10:00:00 on February 10, 2012, and the location where the failure occurred was the A route relay device for A station installed in B station (see FIG. 5). Communication device 523). “Operation” displayed in the column “M” indicates that the alarm displayed in the row number 1 is an alarm caused by the maintenance work. Line number 8 indicates that the failure indicated by line number 1 has been recovered.

  Line number (#) 2 indicates that a reception abnormality has occurred in the B route relay apparatus (communication apparatus 514 in FIG. 5) for B station installed in A station. The column “M” is blank and indicates that the alarm displayed in the row number 2 is not an alarm caused by maintenance work. Line number 5 indicates that the failure indicated by line number 2 has been recovered.

  Line numbers (#) 3 and 4 indicate alarms generated due to the failure of the B-route communication device 514 during maintenance of the A-route communication device 523. The column “M” is blank and indicates that the alarm displayed in the row numbers 3 and 4 is not an alarm caused by the maintenance work. Line numbers 6 and 7 indicate that the failure indicated by line numbers 3 and 4 has been recovered.

  In the conventional method, the alarm mask applied during the maintenance work does not include the alarm for the communication service. Therefore, when the maintenance work is performed in the communication device 514 in FIG. Is indistinguishable from an alarm caused by a failure.

  FIG. 7 shows a log display screen when an alarm mask including a communication service alarm is applied during maintenance work in the situation of FIG. 5 described above. The alarm of the communication service is masked, that is, “Production” is displayed as row numbers (#) 3, 4, 6, and 7 in FIG. 7, and is displayed as an alarm caused by maintenance work. In this case, although a failure has occurred in the B route, the NMS user mistakes that the alarm of the communication service is caused by the maintenance work.

JP 2009-152858 A

  The present invention relates to a method for identifying an alarm caused by maintenance work by setting an alarm mask including an alarm of a communication service when maintenance work is performed on all routes in a network having redundant routes. Providing the device.

A method in which a network management device sets an alarm mask,
The network management device manages a network having first and second routes for providing a communication service, and accepts information on maintenance work of the first and second routes from a user, a mask, a mask It has a generation unit, a control unit and a monitoring unit,
The method is
A first alarm mask applied to the first route and including an alarm of the communication service, based on the maintenance work information of the first and second routes received by the work registration unit; Generating a second alarm mask applied to the second route and including an alarm of the communication service;
The control unit determining a route on which maintenance work is being performed among the first and second routes;
When it is determined that maintenance work is being performed on both the first route and the second route, the monitoring unit sets the first alarm mask on the first route, and the second route. Setting the second alarm mask to
Having a method.

  The disclosed method has an effect that an alarm of a communication service caused by maintenance work can be distinguished from an alarm caused by a failure.

It is an example network block diagram. 1 is an exemplary functional block diagram of a network management system. The time chart of the conventional network maintenance method is shown. The flowchart of the conventional network maintenance method is shown. The example of the network block diagram in which the conventional network maintenance method is used is shown. 6 shows a log display screen when an alarm mask that does not include an alarm for a communication service is applied in the configuration of FIG. 6 shows a log display screen when an alarm mask including a communication service alarm is applied in the configuration of FIG. 2 shows a time chart of the network maintenance method according to the first embodiment of the present invention. 1 shows a flowchart of a network maintenance method according to a first embodiment of the present invention. 1 is an exemplary functional block diagram of a network management system according to a first embodiment of the present invention. FIG. 6 shows a time chart of a network maintenance method according to a second embodiment of the present invention. 6 shows a flowchart of a network maintenance method according to a second embodiment of the present invention. 10 shows an example of a change in a management table according to the second embodiment of the present invention. FIG. 4 is an exemplary functional block diagram of a network management system according to a second embodiment of the present invention. 1 shows an example of a network configuration diagram in which a network maintenance method according to a first embodiment of the present invention is used. 2 shows a log display screen according to the first embodiment of the present invention. 1 shows an example of a network configuration diagram in the case where a network maintenance method according to a first embodiment of the present invention is used in an apparatus. The log display screen in the case of FIG. 17 is shown. An example of a change in the management table in the case of FIG. 17 is shown. 2 shows an example of a network configuration diagram when the network maintenance method according to the first embodiment of the present invention is used in a line. FIG. The log display screen in the case of FIG. 20 is shown. An example of a change in the management table in the case of FIG. 20 is shown. 2 shows an example of a hardware block diagram of a network management system.

<First Embodiment>
The alarm mask setting method according to the first embodiment of the present invention will be described below. A case where maintenance work is performed in the network 100 as shown in FIG. 1 will be described. FIG. 8 shows a time chart of the network maintenance method according to the first embodiment of the present invention. The user registers the network configuration shown in FIG. The NMS 1000 will be described later.

  At time T801 in FIG. 8, the user registers information related to the maintenance work for the route A (FIG. 1) in the NMS. The information related to the maintenance work includes the start date and time and end date and time of the maintenance work, the communication device and equipment to be stopped, and the like. The NMS generates an alarm mask that does not include the alarm of the communication service to be applied to the A route and the alarm mask that includes the alarm of the communication service to be applied to the A route based on the information regarding the registered maintenance work and the network configuration. .

  At time T802, the user registers information related to the maintenance work for the B route (FIG. 1) in the NMS. The information related to the maintenance work includes the start date and time and end date and time of the maintenance work, the communication device and equipment to be stopped, and the like. The NMS generates an alarm mask that does not include the alarm of the communication service to be applied to the B route and the alarm mask that includes the alarm of the communication service to be applied to the B route based on the information regarding the registered maintenance work and the network configuration. .

  At time T803, the communication carrier starts maintenance work for the A route registered at time T801. At this time, the NMS checks whether maintenance work is also being performed on the B route. Whether or not the maintenance work is being performed may be determined based on the information regarding the maintenance work of the B route registered at time T802 or the input of the start or end of the maintenance work to the NMS by the worker.

  At time T803, maintenance work is performed only on the A route, and maintenance work is not performed on the B route. Therefore, even if the maintenance work is performed on the A route, the communication service is not affected at all. Therefore, the NMS applies the alarm mask that does not include the communication service alarm generated at the time T801 to the A route. The alarm mask may be applied manually by an operator through the NMS, for example. Alternatively, the NMS may automatically apply the alarm mask that does not include the communication service alarm generated at time T801 to the route A when the registered maintenance work start date and time comes.

  From time T803 to T804, an alarm mask that does not include an alarm for communication service is applied to the A route. During this time, when a failure occurs in the route B and an alarm of communication service is notified to the NMS, the NMS recognizes and displays this alarm as an alarm caused by the failure.

  At time T804, the communication carrier starts maintenance work for the B route registered at time T802. At this time, the NMS checks whether or not maintenance work is being performed in the A route. Whether or not the maintenance work is being performed is determined based on the information related to the maintenance work of the route A registered at time T801, for example, the start date and time and the end date and time of the maintenance work.

  At time T804, maintenance work has already been performed on the A route, and maintenance work is also started on the B route. Accordingly, a communication service alarm will be notified due to the maintenance work of the A and B routes. The NMS releases the alarm mask that does not include the communication service alarm applied to the A route at time T803, and applies the alarm mask that includes the communication service alarm generated at time T801 to the A route. Further, the NMS applies the alarm mask including the communication service alarm generated at time T802 to the B route.

  The alarm mask may be applied manually by an operator through the NMS, for example. Alternatively, the NMS may automatically cancel and apply the alarm mask when the registered maintenance work start date and time comes. That is, the NMS automatically cancels the alarm mask that does not include the communication service alarm, and cancels the alarm mask, and the communication service alarm to be applied to the A and B routes generated at time T801. May be applied to the A and B routes, respectively.

  From time T804 to T805, alarm masks including communication service alarms are applied to the A and B routes, respectively. During this time, maintenance work is performed simultaneously on the A and B routes, and when the communication service alarm is notified to the NMS, the NMS finds the same alarm in the applied alarm mask, and this alarm is attributed to the maintenance work. Recognize and display as an alarm.

  At time T805, the communication carrier ends the maintenance work for the A route registered at time T801. At this time, the NMS checks whether maintenance work is being performed on the B route. Whether or not the maintenance work is being performed is determined based on information related to the maintenance work of the B route registered at time T802, for example, the start date and time and the end date and time of the maintenance work.

  At time T805, the maintenance work for the A route is completed, and the maintenance work is continued for the B route. Therefore, even if maintenance work is performed on the B route, the communication service is provided as usual via the A route. The NMS cancels the alarm mask including the communication service alarm applied to the A and B routes at time T804, and applies the alarm mask not including the communication service alarm generated at time T802 only to the B route.

  From time T805 to T806, the alarm mask is not applied to the A route, and the alarm mask not including the communication service alarm is applied to the B route. During this time, when a failure occurs in the A route and an alarm of the communication service is notified to the NMS, the NMS recognizes and displays this alarm as an alarm caused by the failure because there is no alarm mask applied to the A route. .

  At time T806, the communication carrier ends the maintenance work for the B route registered at time T802. At this time, the NMS checks whether maintenance work is being performed on the A route. Whether or not the maintenance work is being performed is determined based on the information related to the maintenance work of the route A registered at time T801, for example, the start date and time and the end date and time of the maintenance work.

  At time T806, the maintenance work for the A route has already been completed, and the maintenance work for the B route is also finished. Therefore, the communication service is provided as usual via the A or B route. The NMS cancels the alarm mask that does not include the communication service alarm applied to the B route at time T806.

  Next, the method for applying the alarm mask described with reference to FIG. 8 will be described with reference to FIG. FIG. 9 shows a flowchart of the network maintenance method according to the first embodiment of the present invention. The method shown in FIG. 9 is executed by the NMS.

  In step 902, the NMS registers information regarding maintenance work input by the user.

  In step 904, the NMS generates an alarm mask including an alarm for a communication service to be applied to the route A and an alarm mask including an alarm for a communication service to be applied to the route B based on the information regarding the maintenance work registered in the step 902. Generate.

  In step 906, the NMS does not include the alarm mask that does not include the alarm of the communication service to be applied to the A route and the alarm of the communication service to be applied to the B route based on the information regarding the maintenance work registered in the step 902. Generate an alarm mask.

  Steps 902 to 906 correspond to operations at time T801 and time T802 in FIG.

  In step 908, maintenance work is initiated on one route.

  In step 910, it is determined whether maintenance work is being performed on another route.

  If it is determined in step 910 that maintenance work is not being performed on another route, the method proceeds to step 912. In step 912, the NMS applies an alarm mask that does not include the communication service alarm generated in step 906 to the route on which maintenance work is being performed or started.

  Steps 908 to 912 correspond to time T803 in FIG.

  If it is determined at step 910 that another route is also undergoing maintenance work, the method proceeds to step 914. In step 914, the NMS applies an alarm mask that includes the communication service alarm generated in step 904 to the route on which maintenance work is being performed or started, ie both A and B routes. Step 910 corresponds to time T804 in FIG.

  In step 916, the maintenance work for one route ends. Step 916 corresponds to time T805 in FIG.

  In step 918, it is determined whether maintenance work is being performed on another route.

  If step 918 determines that maintenance work is not being performed on another route, the method proceeds to step 920. In step 920, the NMS removes the alarm mask for all routes regardless of whether or not the communication service alarm is included.

  If it is determined in step 918 that maintenance work is being performed on another route, the method proceeds to step 922. In step 922, the NMS cancels the alarm mask that includes the communication service alarm in step 914 if it has been applied. Further, the NMS applies the alarm mask that does not include the communication service alarm generated in step 906 to the route on which the maintenance work is being performed. Further, the NMS cancels the alarm applied to the route for which the maintenance work has been completed. Step 922 corresponds to time T805 in FIG.

  At step 924, the method ends.

  The operation of the NMS according to the first embodiment of the present invention will be described with reference to FIG. FIG. 10 is an exemplary functional block diagram of an NMS according to the first embodiment of the present invention. The NMS 1000 includes a configuration management unit 1010 that manages a network configuration, a work management unit 1020 that manages maintenance work performed by a communication carrier, a monitoring unit 1030 that monitors a failure that occurs in each communication device in the network, a communication carrier, and the like. User interfaces 1013, 1027, 1028, 1034 with other users.

  The configuration management unit 1010 includes a network configuration registration unit 1011 that registers information related to the network configuration input from the user via the user interface 1013, and a network configuration database 1012 that stores information related to the registered network configuration.

  The work management unit 1020 includes a work registration unit 1021, a work database 1022, a mask generation unit 1023, an alarm mask (not including communication service) database 1024, an alarm mask (including communication service) database 1025, and a control unit 1026.

  The work registration unit 1021 registers information related to maintenance work input from the user via the user interface 1027. The work database 1022 stores information related to maintenance work registered in the work registration unit 1021. The operations of the work registration unit 1021 and the work database 1022 correspond to the registration of the maintenance work for the A and B routes at times T801 and T802 in FIG. 8 and step 902 in FIG.

  The mask generation unit 1023 generates an alarm mask based on information related to maintenance work stored in the work database 1022. The mask generation unit 1023 generates an alarm mask including a communication service alarm and an alarm mask not including a communication service alarm to be applied to each route (A route and B route in FIG. 1) of the network as illustrated in FIG. Generate. The mask generation unit 1023 generates each alarm mask at times T801 and T802 in FIG. 8 and steps 904 and 906 in FIG.

  The alarm mask (not including the communication service) database 1024 stores the alarm mask that is generated by the mask generation unit 1023 and does not include the communication service alarm. The alarm mask (not including the communication service) database 1024 stores an alarm mask that does not include the communication service alarm at the times T801 and T802 in FIG. 8 and the step 906 in FIG.

  The alarm mask (including communication service) database 1025 stores the alarm mask including the communication service alarm generated by the mask generation unit 1023. The alarm mask (including communication service) database 1025 stores alarm masks including communication service alarms at times T801 and T802 of FIG. 8 and step 904 of FIG.

  The control unit 1026 receives an instruction to start or end maintenance work from the user via the user interface 1028, and should apply either an alarm mask including a communication service alarm or an alarm mask not including a communication service alarm to each route. Decide what to do. The control unit 1026 applies the alarm mask by copying the determined alarm mask to the alarm mask database 1032 of the monitoring unit 1030. Or the control part 1026 may determine the alarm mask which should be applied to each route based on the information regarding the maintenance work stored in the work database 1022, and may apply the alarm mask.

  The control unit 1026 determines the start of the maintenance work based on the input from the user interface 1028 or the information related to the maintenance work stored in the work database 1022 at the times T803 and T804 in FIG. 8 and the step 908 in FIG.

  Further, the control unit 1026 performs the maintenance work on the other route based on the input from the user interface 1028 or the information on the maintenance work stored in the work database 1022 at the times T803 and T804 in FIG. 8 and the step 910 in FIG. Determine if it is done or will be started.

  If the control unit 1026 determines in step 910 in FIG. 9 that maintenance work is not performed or started on the other route, that is, maintenance work is performed only on one route, step 912 in FIG. 9 or FIG. At time T803, the alarm mask stored in the alarm mask (not including communication service) database 1024 is copied to the alarm mask database 1032 of the monitoring unit 1030.

  If the control unit 1026 determines in step 910 in FIG. 9 that maintenance work is being performed or started on the other route, that is, maintenance work is being performed on both routes, step 914 in FIG. 9 or FIG. At time T804, the alarm mask stored in the alarm mask (including communication service) database 1025 is copied to the alarm mask database 1032 of the monitoring unit 1030.

  The control unit 1026 determines the end of the maintenance work based on the input from the user interface 1028 or the information on the maintenance work stored in the work database 1022 at the times T805 and T806 in FIG. 8 and the step 916 in FIG.

  The control unit 1026 performs maintenance work on the other route based on information from the user interface 1028 or maintenance work stored in the work database 1022 at times T805 and T806 in FIG. 8 and step 918 in FIG. Or whether it is started.

  If the control unit 1026 determines in step 918 in FIG. 9 that maintenance work has not been performed or started on the other route, that is, maintenance work has not been performed on all routes, the monitoring unit 1026 in FIG. All the alarm masks copied to the alarm mask database 1032 of 1030 are deleted. As a result, all the alarm masks applied to all routes are canceled regardless of whether or not they include communication service alarms.

  If the control unit 1026 determines in step 918 in FIG. 9 that maintenance work is being performed or started on the other route, that is, maintenance work is being performed on one route, monitoring is performed in step 922 in FIG. Among the alarm masks copied to the alarm mask database 1032 of the unit 1030, the alarm mask applied to the route for which the maintenance work has been completed is deleted. As a result, the alarm mask applied to the route for which the maintenance work has been completed is canceled regardless of whether or not the communication service alarm is included.

  If the control unit 1026 determines that maintenance work is performed on one route, the control unit 1026 includes the communication service alarm copied to the alarm mask database 1032 for application to the route on which the maintenance work is performed. Delete the alarm mask. Further, the control unit 1026 applies the alarm mask that does not include the communication service alarm from the alarm mask (not including the communication service) database 1024 of the work management unit 1021 in order to apply to the route on which the maintenance work is performed. Copy to database 1032.

  As a result, when the maintenance work on both routes changes from the maintenance work on only one route, the alarm mask applied to the route on which the maintenance work is performed communicates. Changed from including service alarms to not including service alarms.

  The monitoring unit 1030 includes a communication interface 1031, an alarm mask database 1032, and an alarm database 1033.

  The communication interface 1031 receives alarms from various communication devices 1040 included in the network as shown in FIG. The alarm database 1033 stores information related to an alarm indicating a failure that has occurred in each communication device in the network. The alarm mask database 1032 stores an alarm mask that is actually applied to each route of the network. The alarm mask stored in the alarm mask database 1032 is a copy of a part or all of the alarm mask stored in the alarm mask (not including communication service) database 1024 and the alarm mask (including communication service) database 1025.

  Between time T803 to T804 and time T805 to T806 in FIG. 8, an alarm mask that does not include a communication service alarm is copied to the alarm mask database 1032 and applied to each route. When an alarm is notified to the communication interface 1031 from the communication device 1040 existing on the route on which the maintenance work is performed during this period, the monitoring unit 1030 displays an alarm mask to be applied to the route on which the maintenance work is being performed. It is checked whether or not the notified alarm is included in the alarm mask that does not include the communication service alarm copied to the database 1032. When a matching alarm is found, when the notified alarm is displayed via the user interface 1034, it is also displayed that the alarm is caused by maintenance work.

  On the other hand, if an alarm is notified to the communication interface 1031 from the communication device 1040 existing in the route where maintenance work is not performed during the period from time T803 to T804 and time T805 to T806 in FIG. Check if there is an alarm mask copied to apply to that route. In this example, there is no alarm mask to be applied to a route for which maintenance work is not performed. Therefore, when the notified alarm is displayed via the user interface 1034, the monitoring unit 1030 is an alarm caused by a failure. It also displays that there is. Alternatively, by not displaying that the alarm is caused by the maintenance work, the alarm can be distinguished from the alarm caused by the maintenance work.

  The user interfaces 1013, 1027, 1028, and 1034 are usually personal computers (PCs), but may be desktop PCs, notebook PCs, tablet PCs, general-purpose devices, dedicated devices, or the like. Although four user interfaces are shown in FIG. 10, these may be implemented by one or other number of devices.

  In summary, the NMS is based on information on maintenance work, alarm masks that do not include alarms for communication services that should be applied to the A and B routes, and alarms that include alarms for communication services that should be applied to the A and B routes, respectively. A total of four types of masks for masks are generated. When the maintenance work starts or ends on one route, the NMS determines whether the maintenance work is being performed on the other route. While the maintenance work is being performed only on one route, an alarm mask that does not include the communication service alarm is applied to the route on which the maintenance work is being performed. While maintenance work is being performed on both routes, an alarm mask including a communication service alarm is applied to both routes. When the maintenance work is completed on one route and the maintenance work is continued on the other route, the alarm of the route on which the maintenance work is continued is reset. That is, the alarm mask including the communication service alarm is canceled, and the alarm mask not including the communication service alarm is applied again.

  In the example of FIG. 8, the maintenance work is performed in the order of starting the maintenance work for the A route, starting the maintenance work for the B route, ending the maintenance work for the A route, and ending the maintenance work for the B route. In this embodiment, when maintenance work is started and completed simultaneously on a plurality of routes, maintenance work is performed in any order, such as when maintenance work of B route is started and finished during maintenance work of A route. It can be applied to other examples.

  In this way, the NMS selects and applies an alarm mask according to the maintenance work implementation status in each route, so that an appropriate alarm mask can be set even in the maintenance work of a network having a redundant configuration. As a result, the NMS can identify whether the alarm notified from the network is caused by maintenance work or failure.

<Second Embodiment>
Next, an alarm mask setting method according to the second embodiment of the present invention will be described. A case where maintenance work is performed in a network having N routes for providing one service will be described. N is a natural number of 2 or more. FIG. 11 shows a time chart of the network maintenance method according to the second embodiment of the present invention. The user registers the network configuration having N routes in the NMS 1400 in advance. The NMS 1400 will be described later.

  Between times T1101 and T1102 in FIG. 11, the user registers information related to maintenance work from the A route to the N route in the NMS. The information related to the maintenance work includes the start date and time and end date and time of the maintenance work, the communication device and equipment to be stopped, and the like. The NMS generates an alarm mask that does not include the alarm of the communication service to be applied to the A route and the alarm mask that includes the alarm of the communication service to be applied to the A route based on the information regarding the registered maintenance work and the network configuration. . Similarly, an alarm mask to be applied from the B route to the N route is also generated.

  Between times T1103 and T1106, the communication carrier starts maintenance work for the N route from the A route registered between times T1101 and T1102. At this time, the NMS stores, for example, a management table as to which route the maintenance work is being performed, and each time the maintenance work is started or terminated, the number of routes for which the maintenance work is being performed is calculated. Count. The information on the maintenance work from the A route to the N route registered between the times T1101 to T1102 or the start or end of the maintenance work to the NMS by the worker is based on which route and when the maintenance work is performed. The determination may be made based on the input.

  In the example of FIG. 11, it is assumed that the number of routes for which maintenance work is being performed is less than N from time T1103 to T1104. In this case, since the communication service is provided through any of the N routes that are not subjected to maintenance work, the NMS does not include the communication service alarm in the route where maintenance work is performed. Apply a mask.

  It is assumed that the number of routes for which maintenance work is being performed is equal to N from time T1104 to T1105. In this case, since maintenance work is performed in all routes, the communication service cannot be provided through any route, and an alarm of the communication service due to the maintenance work will be notified. Thus, the NMS applies an alarm mask that includes an alarm for communication services to all N routes.

  From time T1105 to T1106, it is assumed that maintenance work has been completed for some routes, and the number of routes for which maintenance work is being performed is less than N. In this case, the communication service is provided through any of the N routes that are not subjected to maintenance work, as in the above-described period from time T1103 to T1104. Release the alarm mask that includes the alarm, and reapply the alarm mask that does not include the communication service alarm to the route where maintenance work is being performed.

  At time T1106, the maintenance work for all routes ends. Therefore, the NMS releases the alarm mask for all routes.

  Next, the method for applying the alarm mask described with reference to FIG. 11 will be described with reference to FIG. FIG. 12 shows a flowchart of a network maintenance method according to the second embodiment of the present invention. The method shown in FIG. 12 is executed by the NMS.

  In step 1202, the NMS registers information related to maintenance work input by the user.

  In step 1204, the NMS generates an alarm mask that does not include a communication service alarm to be applied to each of the N routes and an alarm mask that includes a communication service alarm based on the information regarding the maintenance operation registered in step 1202. To do.

  Steps 1202 and 1204 correspond to operations at times T1101 to T1102 in FIG.

  In step 1206, the maintenance work registered in step 1202 is started.

  NMS indicates whether or not maintenance work is being performed on each route, the number of routes on which maintenance work is being performed (in the present specification, the number of alarm masks set and the number of alarm masks are also described), The number of routes for providing one communication service (also referred to as the number of routes in the present specification) is stored as a management table. Since maintenance work has been started on one route in step 1206, the NMS updates the management table in step 1210.

  In step 1212, the NMS compares the number of alarm masks with the number of routes. If the number of alarm masks is equal to or greater than the number of routes, maintenance work is being done on all routes and a communication service alarm will be notified. Accordingly, proceeding to step 1214, the NMS applies an alarm mask that includes communication service alarms to all routes undergoing maintenance work.

  Steps 1206 to 1214 correspond to times T1104 to T1105 in FIG.

  In step 1216, the maintenance work for any route ends.

  In step 1216, since the maintenance work has been completed for one route, in step 1220, the NMS updates the management table. Then, the process returns to step 1206 and is repeated from the start of maintenance work for another route.

  If the number of alarm masks is smaller than the number of routes in step 1212, communication service alarms due to maintenance work will not be notified because the communication service is provided via a route that has not undergone maintenance work or has been completed. . Accordingly, in step 1224, the NMS applies the alarm mask that does not include the communication service alarm to the route on which the maintenance work is performed, and releases the alarm mask set on the route on which the maintenance work has been completed. Then, the process returns to step 1206 and is repeated from the start of maintenance work for another route.

  Steps 1216 to 1220 and 1224 correspond to times T1105 to T1106 in FIG.

  Next, a management table according to the second embodiment of the present invention will be described with reference to FIG. FIG. 13 shows an example of changes in the management table according to the second embodiment of the present invention. As shown in FIG. 13, the management table stores the communication service, the number of routes, the number of alarm masks, and the presence / absence of work in each route.

  The column of the communication service is not essential. For example, “normal” is set when the communication service is provided as usual, and “working” is set when the communication service is not provided by maintenance work.

  In the column for the number of routes, the number of routes provided for providing one communication service is set. For example, in the example of FIG. 1, since the A route and the B route are provided to provide one communication service, the number of routes is two. In the example of FIG. 11, N routes are provided from the A route, so the number of routes is N.

  In the work column, whether or not maintenance work is being performed in each route is set. In FIG. 13A, the work column for route A is set to 1, indicating that maintenance work is being performed on route A. The work column for the B route and the N route is set to 0, indicating that maintenance work is not being performed on the B route and the N route.

  In the column for the number of alarm masks, the number of routes for which maintenance work is being performed, that is, the number of set alarm masks is set. The number of alarm masks is determined by counting the number of routes for which 1 is set in the work column.

  Referring to (a) of FIG. 13, it is understood that maintenance work is being performed only on the A route because work = 1 is set for the A route and work = 0 is set for the other routes. Therefore, the number of alarm masks = 1. The management table shown in FIG. 13A shows an example when the operation of the route A is started at time T1103 in FIG. At this time, since the number of alarm masks = 1 for the number of routes = N (N is a natural number equal to or greater than 2), the number of alarm masks ≧ the number of routes is false in step 1212 of FIG. 12, and the method proceeds to step 1224. In step 1224, the alarm mask that does not include the communication service alarm is applied to the route on which the maintenance work is performed, that is, the A route, and the alarm mask set to the route on which the maintenance work is completed is released. .

  Next, when the maintenance work is started for all N routes at time T1104 in FIG. 11, the management table shows routes A, B,..., N as shown in FIG. Work = 1 is set, and the number of alarm masks = N. At this time, since the number of routes = N (N is a natural number equal to or greater than 2), the number of alarm masks = N, the number of alarm masks ≧ the number of routes is true in step 1212 of FIG. 12, and the method proceeds to step 1214. In step 1214, an alarm mask including a communication service alarm is applied to all routes on which maintenance work is performed, that is, all routes A to N.

  Next, when the maintenance work for the A route is completed at time T1105 in FIG. 11, as shown in FIG. 13C, the management table shows the work for the A route = 0 and the work for the B to N routes = 1. Is set, and the number of alarm masks = N−1. At this time, since the number of routes = N (N is a natural number equal to or greater than 2), the number of alarm masks = N−1, the number of alarm masks ≧ the number of routes becomes false at step 1212 in FIG. 12, and the method proceeds to step 1224. In step 1224, an alarm mask that does not include an alarm for the communication service is applied from the B route to the N route in which maintenance work is performed, that is, from the B route to the N route. Is released. If an alarm mask that includes an alarm for a communication service is applied from the B route to the N route, the alarm mask that does not include the communication service is applied again after canceling these alarm masks.

  Next, when the maintenance work for all routes is completed at time T1106 in FIG. 11, as shown in (d) of FIG. 13, the management table sets work = 0 for all routes A to N, The number of alarm masks = 0. At this time, since the number of alarm masks = 0 for the number of routes = N (N is a natural number of 2 or more), the number of alarm masks ≧ the number of routes is false in step 1212 of FIG. 12, and the method proceeds to step 1224. In step 1212, the alarm mask set for the route for which the maintenance work has been completed is released.

  As described above, even in a network having N routes for providing one communication service, an alarm mask including a communication service alarm and a communication service alarm are not included depending on the maintenance work status of each route. Alarm mask can be selected and applied.

  The operation of the NMS according to the second embodiment of the present invention will be described with reference to FIG. FIG. 14 is an exemplary functional block diagram of an NMS according to the second embodiment of the present invention. The NMS 1400 has a management table 1429 in addition to the components of the NMS 1000 in FIG. Components similar to those in FIG. 10 operate in the same manner as in FIG. 10, so description thereof is omitted here.

  The management table 1429 is updated by the control unit 1426 as described above with reference to FIG. 13 every time maintenance work is started or finished in any one of the A route to the N route.

  The control unit 1426 compares the number of alarm masks in the management table 1429 with the number of routes. If the number of alarm masks ≧ the number of routes is true, the control unit 1426 applies an alarm mask including communication service alarms to all routes (FIG. 12). Stage 1212, 1214). In addition, when the number of alarm masks ≧ the number of routes is false, the control unit 1426 applies an alarm mask that does not include the communication service alarm to the route on which the maintenance work is performed, and alarms on the route on which the maintenance work has ended. The mask is released (steps 1212 and 1224 in FIG. 12).

  In the example of FIG. 11, the start of the maintenance work for the A route, the start of the maintenance work for the B route, ..., the start of the maintenance work for the N route, the end of the maintenance work for the A route, the end of the maintenance work for the B route, ..., maintenance work was performed in the order of completion of maintenance work on the N route. In the present embodiment, when maintenance work is started and ended at the same time on some or all of the N routes, the maintenance work of another route is started and ended during the maintenance work of one route. It can also be applied to an example in which maintenance operations are performed in any order.

<Example of alarm display when using the first embodiment>
A description will be given of how the NMS displays an alarm when using the first embodiment described above. FIG. 15 shows an example of a network configuration diagram in which the network maintenance method according to the first embodiment of the present invention is used. The network configuration shown in FIG. 15 is the same as the network configuration shown in FIG.

  In FIG. 15, maintenance work is performed between 10:00 and 12:00 on the communication device 8 installed in Shizuoka 1530 included in the A route. Due to the maintenance work of the A route, an alarm of reception abnormality is notified to the NMS from the communication devices 1, 6, 7, 9, 14 of the A route, and an alarm of disconnection of the A route is notified from the communication devices A, B. As expected, the alarm mask to be applied to the A route includes these alarms.

  In FIG. 15, maintenance work is performed between 11:00 and 13:00 on the communication device installed in Kanazawa 1550 included in the B route. Due to the maintenance work on the A route, the NMS is notified of an alarm for abnormal reception from the communication devices A, B, K, K, and B on the B route and an alarm for disconnection of the B route from the communication devices A and B. Therefore, the alarm mask to be applied to the B route includes these alarms.

  Between 10:00 and 10:59, maintenance work is performed only on the A route, and the communication service is normally provided via the B route. Therefore, an alarm mask that does not include the communication service alarm is provided on the A route. Applied.

  Between 11:00 and 12:00, maintenance work is performed on both the A and B routes, the communication service is not provided, and an alarm of the communication service is expected to occur. Therefore, the alarm mask that does not include the communication service alarm set in the A route is canceled, and the alarm mask that includes the communication service alarm is applied to both the A and B routes.

  Between 12:01 and 13:00, the maintenance work of the A route is completed, the maintenance work is performed only on the B route, and the communication service is provided as usual through the A route. Therefore, the alarm mask including the communication service alarm applied to the A and B routes is canceled, and the alarm mask not including the communication service alarm is applied to the B route again.

  After 13:01, the maintenance work for the B route ends, so the alarm mask that does not include the alarm for the communication service applied to the B route is canceled, and the communication service is provided as usual via the A or B route. The

  With reference to FIG. 16, how the alarm is displayed when the maintenance work is performed as shown in FIG. 15 will be described. FIG. 16 is displayed on one or more of the monitors of the user interfaces 1013, 1027, 1028, 1034 of the NMS 1000 shown in FIG. Although four user interfaces are shown in FIG. 10, these may be integrated as one user interface.

  Line numbers (#) 1 to 7 in FIG. 16 display alarms notified when the maintenance work for the A route is started at 10:00. Since these alarms are included in the alarm mask that does not include the alarm of the communication service applied to the A route between 10:00 and 10:59, the maintenance work is indicated in the “M” column of the line numbers 1 to 7. “Saku” is displayed to indicate that the alarm is caused by.

  Line numbers 8 to 14 display an alarm notified when the maintenance work of the B route is started at 11:00. Since these alarms are included in the alarm mask including the alarm of the communication service applied to the B route between 11:00 and 12:00, the “M” column in the line numbers 8 to 14 is used for maintenance work. “Saku” indicating that the alarm is caused is displayed.

  Line number 15 displays an alarm that is notified when the maintenance work is started on the B route in addition to the maintenance work on the A route at 11:00. Since this alarm is included in the alarm mask including the alarm of the communication service applied to the A and B routes between 11:00 and 12:00, the “M” column in line number 15 is caused by maintenance work. "Saku" indicating that the alarm is to be performed is displayed.

  Line number 16 indicates that the maintenance work has been continued on route B at 12:00, but the maintenance work has been completed on route A, so that the alarm on line number 15 has been recovered. This alarm recovery is included in the alarm mask including the alarm of the communication service applied to the A and B routes between 11:00 and 12:00. “Saku” is displayed to indicate that the alarm is caused by.

  Line numbers 17 to 19 indicate that the alarm of line numbers 11 to 3 has been recovered because the maintenance work for the A route was completed at 12:00. Since these alarms are included in the alarm mask including the alarm of the communication service applied to the A route between 11:00 and 12:00, the “M” column in the line numbers 17 to 19 indicates maintenance work. “Saku” indicating that the alarm is caused is displayed.

<When apparatus maintenance work is performed according to the first embodiment>
With reference to FIG. 17, an alarm expected when the maintenance work of the apparatus is performed according to the first embodiment will be described. FIG. 17 shows an example of a network configuration diagram when the network maintenance method according to the first embodiment of the present invention is used in the apparatus.

  In the example of FIG. 17, maintenance work is performed by the communication device 1723 of the A route between 10:00 and 12:00. Due to the maintenance work of the A route, it is expected that the communication apparatus 1723 will notify the transmission abnormality, reception abnormality, and power supply abnormality. Further, the communication devices 1722 and 1712 will notify the A route disconnection.

  Also, maintenance work is performed in the communication device 1714 on the B route between 11:00 and 13:00. Due to the maintenance work of the B route, it is expected that the communication device 1714 notifies a transmission abnormality, a reception abnormality, and a power supply abnormality. Further, the B route disconnection will be notified from the communication devices 1722 and 1712.

  Further, since maintenance work is performed on both the A route and the B route between 11:00 and 12:00, the communication devices 1711 and 1721 will notify the communication disconnection (both route disconnection).

  Therefore, an alarm mask including the above-described alarms is generated and applied to each route. Between 10:00 and 10:59, an alarm mask that does not include a communication service alarm is applied to the A route. Between 11: 00 and 11:30, alarm masks including communication service alarms are applied to both the A route and the B route. Between 11:31 and 12:00, an alarm mask that does not include an alarm for the communication service is applied to the B route.

  When the alarm mask is applied in this way, the alarm log display screen by the NMS is as shown in FIG. FIG. 18 is a diagram showing a log display screen in the case of FIG.

  Line number (#) 1 displays an alarm notified when the maintenance work of the communication device 1723 of the A route is started at 10:00. Since this alarm is included in the alarm mask that does not include the alarm of the communication service applied to the A route between 10:00 and 10:59, the “M” column in line number 1 is caused by maintenance work. “Saku” indicating an alarm is displayed.

  Line numbers (#) 2 to 4 display an alarm notified when the maintenance work of the communication device 1714 of the B route is started at 11:00. Since these alarms are included in an alarm mask including communication service alarms applied to the A route and the B route between 11: 00 and 11:30, the “M” column in the row numbers 2 to 4 includes “Operation” indicating that the alarm is caused by maintenance work is displayed.

  Line numbers (#) 5 to 7 indicate that the previously notified alarm is restored when the maintenance work of the communication device 1714 of the B route is completed at 11:30. Since these alarms are included in an alarm mask including alarms of communication services applied to the A route and the B route between 11: 00 and 11:30, the “M” column in the row numbers 5 to 7 “Operation” indicating that the alarm is caused by maintenance work is displayed.

  Line number (#) 8 indicates that the alarm notified previously has been recovered when the maintenance work of the communication device 1723 of the A route is completed at 12:00. Since this alarm is included in the alarm mask that does not include the alarm of the communication service applied to the A route between 11:31 and 12:00, the “M” column in line number 8 is caused by maintenance work. “Saku” indicating an alarm is displayed.

<When apparatus maintenance work is performed: Combination of first and second embodiments>
Furthermore, the case where the above-mentioned 2nd Embodiment is combined in the case of FIG. 17, FIG. 18 is demonstrated. FIG. 19 shows an example of changes in the management table in the case of FIG.

  Since the example shown in FIG. 17 has an A route and a B route, the number of routes is two. At time 9:00, since maintenance work is not performed on both the A and B routes, work = 0 and the number of alarm masks = 0, and the communication service is provided as usual.

  At time 10:00, since the maintenance work is performed on the A route, the work of the A route = 1, the work of the B route = 0, and the number of alarm masks = 1, and the communication service is normally provided via the B route. The

  At time 11:00, since maintenance work is performed on both the A route and the B route, the work of the A route = 1, the work of the B route = 1, and the number of alarm masks = 2, and the communication service is not provided (work) Inside).

  At time 11:30, the maintenance work for the B route is completed and the maintenance work is performed for the A route. Therefore, the work for the A route = 1, the work for the B route = 0, the number of alarm masks = 1, and the communication service is Provided as usual via the B route.

  At time 12:00, the maintenance work for the A route is also completed, so the A route work = 0, the B route work = 0, and the number of alarm masks = 0, and the communication service is provided as usual.

  Based on this management table, alarm masks to be applied to the A route and the B route are selected. As described above with reference to FIG. 12, when “number of alarm masks ≧ number of routes” is true, an alarm mask including communication service alarms is applied to all routes. In addition, when “number of alarm masks ≧ number of routes” is false, an alarm mask that does not include communication service alarms is applied to the route for which maintenance work is being performed, and the alarm mask that was applied to the route for which work has been completed Is released.

  In the example of FIG. 19, an alarm mask that does not include an alarm of communication service is applied to the A route at 10:00. At 11:00, the alarm mask that does not include the communication service alarm applied to the A route is canceled, and the alarm mask that includes the communication service alarm is applied to the A route and the B route. At 11:30, the alarm mask including the communication service alarm applied to the A route and the B route is released, and the alarm mask not including the communication service alarm is applied to the A route again. At 12:00, the alarm mask that does not include the alarm of the communication service applied to the route A is released.

<When Line Maintenance Work is Performed According to the First Embodiment>
With reference to FIG. 20, an alarm expected when a line maintenance work is performed according to the first embodiment will be described. FIG. 20 shows an example of a network configuration diagram when the network maintenance method according to the first embodiment of the present invention is used in a line.

  In the example of FIG. 20, maintenance work is performed on the A route line between 10:00 and 11:00. Due to the maintenance work of the A route line, it is expected that the communication devices 2012 and 2022 will notify the disconnection of the A route.

  Also, maintenance work is performed on the B route line between 12:00 and 13:00. Due to this B route line maintenance work, it is expected that the communication devices 2012 and 2022 will notify the B route disconnection.

  Therefore, an alarm mask including the above-described alarms is generated and applied to each route. Between 10:00 and 11:00, an alarm mask that does not include a communication service alarm is applied to the A route. Between 12:00 and 13:00, an alarm mask that does not include a communication service alarm is applied to the B route.

  When the alarm mask is applied in this way, the alarm log display screen by the NMS is as shown in FIG. FIG. 21 is a diagram showing a log display screen in the case of FIG.

  Line numbers (#) 1 to 2 display an alarm notified from the communication devices 2012 and 2022 when the maintenance work of the A route line is started at 10:00. Since this alarm is included in the alarm mask that does not include the alarm of the communication service applied to the route A between 10:00 and 11:00, the “M” column in the line numbers 1 and 2 is for maintenance work. “Saku” indicating that the alarm is caused is displayed.

  Line numbers (#) 3 to 4 indicate the alarm recovery notified from the communication devices 2012 and 2022 when the maintenance work for the A route line is completed at 11:00. Since this alarm is included in the alarm mask that does not include the alarm of the communication service applied to the A route between 10:00 and 11:00, the “M” column in the line numbers 3 to 4 indicates maintenance work. “Saku” indicating that the alarm is caused is displayed.

  Line numbers (#) 5 to 6 display an alarm notified from the communication devices 2012 and 2022 when the maintenance work of the B route line is started at 12:00. Since this alarm is included in the alarm mask that does not include the alarm of the communication service applied to the B route between 12:00 and 13:00, the “M” column in the line numbers 5 to 6 indicates maintenance work. “Saku” indicating that the alarm is caused is displayed.

  Line numbers (#) 7 to 8 indicate the recovery of the alarm notified from the communication devices 2012 and 2022 when the maintenance work for the B route line is completed at 13:00. Since this alarm is included in the alarm mask that does not include the alarm of the communication service applied to the B route between 12:00 and 13:00, the “M” column in the line numbers 7 to 8 indicates maintenance work. “Saku” indicating that the alarm is caused is displayed.

<When Line Maintenance Work is Performed: Combination of First and Second Embodiments>
Furthermore, the case where the above-mentioned 2nd Embodiment is combined in the case of FIG. 20, FIG. 21 is demonstrated. FIG. 22 shows an example of changes in the management table in the case of FIG.

  Since the example shown in FIG. 20 has an A route and a B route, the number of routes is two. At time 9:00, since maintenance work is not performed on both the A and B routes, work = 0 and the number of alarm masks = 0, and the communication service is provided as usual.

  At time 10:00, since the maintenance work is performed on the A route, the work of the A route = 1, the work of the B route = 0, and the number of alarm masks = 1, and the communication service is normally provided via the B route. The

  At time 11:00, since the maintenance work is completed on the A route, the work on the A route = 0, the work on the B route = 0, and the number of alarm masks = 0, and the communication service is provided as usual.

  At time 12:00, the maintenance work is performed on the B route, so the A route work = 0, the B route work = 1, and the number of alarm masks = 1, and the communication service is normally provided via the A route. The

  At time 13:00, since maintenance work is not performed on both the A and B routes, the A route work = 0, the B route work = 0, and the number of alarm masks = 0, and the communication service is provided as usual. Is done.

  Based on this management table, alarm masks to be applied to the A route and the B route are selected. As described above with reference to FIG. 12, when “number of alarm masks ≧ number of routes” is true, an alarm mask including communication service alarms is applied to all routes. Also, when “number of alarm masks ≧ number of routes” is false, an alarm mask that does not include communication service alarms is applied to the route for which maintenance work is being performed, and the alarm mask that was applied to the route for which work has been completed Is released.

  In the example of FIG. 23, an alarm mask that does not include an alarm of communication service is applied to the A route at 10:00. At 11:00, the alarm mask that does not include the alarm of the communication service applied to the A route is released. At 12:00, an alarm mask that does not include a communication service alarm is applied to the B route. At 13:00, the alarm mask that does not include the alarm of the communication service applied to the B route is released.

<HMS hardware configuration>
The hardware configuration of the NMS shown in FIGS. 10 and 14 will be described with reference to FIG. FIG. 23 shows an example of a hardware block diagram of the network management system. The NMS 2300 may be a personal computer such as a desktop type, a notebook type, or a tablet type, a general-purpose device, a dedicated device, or the like.

  As shown in FIG. 23, the NMS 2300 includes a CPU 2301, a memory 2302, a hard disk 2303, and a display / keyboard 2304. The CPU 2301 may implement the network registration unit, work registration unit, mask generation unit, control unit, and management table shown in FIGS. The display / keyboard 2304 provides the log display screen of FIGS.

  Further, the NMS 2300 includes a network configuration database 2305, a work database 2306, an alarm mask database 2307, and an alarm database 2308. These databases correspond to the databases shown in FIGS. These databases may be integrated or distributed in the hard disk 2303 or the memory 2302.

  Further, the NMS 2300 has a communication interface 2310. The communication interface 2310 corresponds to the communication interface of FIGS.

Regarding the above-described embodiment, the following additional notes are disclosed.
(Supplementary note 1) A method in which the network management device sets an alarm mask,
The network management device manages a network having first and second routes for providing a communication service, and accepts information on maintenance work of the first and second routes from a user, a mask, a mask It has a generation unit, a control unit and a monitoring unit,
The method is
A first alarm mask applied to the first route and including an alarm of the communication service, based on the maintenance work information of the first and second routes received by the work registration unit; Generating a second alarm mask applied to the second route and including an alarm of the communication service;
The control unit determining a route on which maintenance work is being performed among the first and second routes;
When it is determined that maintenance work is being performed on both the first route and the second route, the monitoring unit sets the first alarm mask on the first route, and the second route. Setting the second alarm mask to
Having a method.
(Supplementary Note 2) A third alarm mask that is applied to the first route and does not include an alarm of the communication service, based on the maintenance work information of the first and second routes, Generating a fourth alarm mask applied to two routes and not including an alarm of said communication service;
When it is determined that maintenance work is being performed on one of the first and second routes, the monitoring unit cancels if the first and second alarm masks are set, Setting the third or fourth alarm mask for one route on which the maintenance work is being performed;
The method according to appendix 1, further comprising:
(Supplementary Note 3) When it is determined that maintenance work is not performed on any of the first and second routes, the monitoring unit sets all the alarms set on the first and second routes. The stage of unmasking,
The method according to appendix 1 or 2, further comprising:
(Additional remark 4) When the alarm which arose in the said 1st or 2nd route is included in the alarm mask applied to the said 1st or 2nd route, respectively, the said monitoring part is a maintenance work. The method according to any one of appendices 1 to 3, wherein the cause is displayed to the user.
(Appendix 5) An apparatus for managing a network having first and second routes for providing a communication service,
A work registration unit that receives information on maintenance work of the first and second routes from a user;
A mask generation unit for generating an alarm mask, which includes an alarm of the communication service applied to the first route based on the maintenance work information of the first and second routes received by the work registration unit. A first alarm mask, a mask generation unit configured to generate a second alarm mask applied to the second route and including an alarm of the communication service;
A control unit for determining a route in which maintenance work is performed among the first and second routes;
A monitoring unit for setting an alarm mask, wherein when it is determined that maintenance work is being performed on both the first and second routes, the first alarm mask is set on the first route. A monitoring unit that sets the second alarm mask for the second route;
Having a device.
(Additional remark 6) The said mask production | generation part is based on the maintenance work information of the said 1st and 2nd route, The 3rd alarm mask which is applied to the said 1st route and does not contain the alarm of the said communication service, Generating a fourth alarm mask that is applied to two routes and does not include an alarm of said communication service;
When it is determined that maintenance work is being performed on one of the first and second routes, the monitoring unit cancels if the first and second alarm masks are set, Setting the third or fourth alarm mask on one route on which the maintenance work is being performed;
The apparatus according to appendix 5.
(Supplementary Note 7) When it is determined that maintenance work is not performed on any of the first and second routes, the monitoring unit sets all the alarms set on the first and second routes. Unmask,
The apparatus according to appendix 5 or 6.
(Supplementary Note 8) When the alarm generated in the first or second route is included in the alarm mask applied to the first or second route, the monitoring unit performs the maintenance operation. The apparatus according to any one of appendices 5 to 7, wherein the cause is displayed to a user through a display.
(Supplementary note 9) A method in which the network management device sets an alarm mask,
The network management device manages a network having N routes for providing one communication service, where N is a natural number, and a work registration unit that receives information on maintenance work of the N routes from a user, a mask It has a generation unit, a control unit and a monitoring unit,
The method is
The mask generation unit generates an alarm mask that is applied to each of the N routes and includes an alarm of the communication service, based on the maintenance work information of the N routes received by the work registration unit;
The control unit determining the number of routes on which maintenance work is being performed;
When it is determined that the number of routes on which the maintenance work is being performed is N, the monitoring unit sets an alarm mask including alarms of the communication service on all of the N routes;
Having a method.
(Supplementary Note 10) The mask generation unit generates an alarm mask that is applied to the N routes and does not include an alarm of the communication service, based on the maintenance work information of the N routes.
When it is determined that the number of routes on which the maintenance work is being performed is less than N, the monitoring unit releases the maintenance mask when an alarm mask including an alarm of the communication service is set, and the maintenance work A step of setting an alarm mask that does not include an alarm of the communication service in a route where
The method according to appendix 9, further comprising:
(Supplementary Note 11) When it is determined that maintenance work is not performed on any of the N routes, the monitoring unit releases all alarm masks set on the N routes,
The method according to appendix 9 or 10, further comprising:
(Supplementary Note 12) When the alarm generated in any one of the N routes is included in an alarm mask applied to the route, the monitoring unit may cause the alarm to be caused by maintenance work. The method according to any one of appendices 9 to 11, wherein the message is displayed to a user.

1000, 1400 NMS
1010, 1410 Configuration management unit 1011, 1411 Network configuration registration unit 1012, 1412 Network configuration database 1020, 1420 Work management unit 1021, 1421 Work registration unit 1022, 1422 Work database 1023, 1423 Mask generation unit 1024, 1424 Alarm mask (communication service Database 1025, 1425 Alarm mask (Not including communication service) Database 1026, 1426 Control unit 1013, 1027, 1028, 1034, 1413, 1427, 1428, 1434 User interface 1429 Management table 1030, 1430 Monitoring unit 1031, 1431 Communication interface 1032 and 1432 Alarm mask database 1033 and 1433 Alarm data Tabas

Claims (6)

A method in which a network management device sets an alarm mask,
The network management device manages a network having first and second routes for providing a communication service, and accepts information on maintenance work of the first and second routes from a user, a mask, a mask It has a generation unit, a control unit and a monitoring unit,
The method is
A first alarm mask applied to the first route and including an alarm of the communication service, based on the maintenance work information of the first and second routes received by the work registration unit; Generating a second alarm mask applied to the second route and including an alarm of the communication service;
The control unit determining a route on which maintenance work is being performed among the first and second routes;
When it is determined that maintenance work is being performed on both the first route and the second route, the monitoring unit sets the first alarm mask on the first route, and the second route. Setting the second alarm mask to
Having a method. The mask generation unit applies a third alarm mask that is applied to the first route and does not include an alarm of the communication service, based on the maintenance work information of the first and second routes, to the second route. Generating a fourth alarm mask that is applied and does not include an alarm of the communication service;
When it is determined that maintenance work is being performed on one of the first and second routes, the monitoring unit cancels if the first and second alarm masks are set, Setting the third or fourth alarm mask for one route on which the maintenance work is being performed;
The method of claim 1 further comprising: When it is determined that maintenance work is not performed on any of the first and second routes, the monitoring unit releases all alarm masks set on the first and second routes. Stage,
The method according to claim 1, further comprising:   When the alarm generated in the first or second route is included in the alarm mask applied to the first or second route, the monitoring unit determines that the alarm is caused by maintenance work. The method according to claim 1, wherein the method is displayed to a user. An apparatus for managing a network having first and second routes for providing a communication service,
A work registration unit that receives information on maintenance work of the first and second routes from a user;
A mask generation unit for generating an alarm mask, which includes an alarm of the communication service applied to the first route based on the maintenance work information of the first and second routes received by the work registration unit. A first alarm mask, a mask generation unit configured to generate a second alarm mask applied to the second route and including an alarm of the communication service;
A control unit for determining a route in which maintenance work is performed among the first and second routes;
A monitoring unit for setting an alarm mask, wherein when it is determined that maintenance work is being performed on both the first and second routes, the first alarm mask is set on the first route. A monitoring unit that sets the second alarm mask for the second route;
Having a device. A method in which a network management device sets an alarm mask,
The network management device manages a network having N routes for providing one communication service, where N is a natural number, and a work registration unit that receives information on maintenance work of the N routes from a user, a mask It has a generation unit, a control unit and a monitoring unit,
The method is
The mask generation unit generates an alarm mask that is applied to each of the N routes and includes an alarm of the communication service, based on the maintenance work information of the N routes received by the work registration unit;
The control unit determining the number of routes on which maintenance work is being performed;
When it is determined that the number of routes on which the maintenance work is being performed is N, the monitoring unit sets an alarm mask including alarms of the communication service on all of the N routes;
Having a method.

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