JP2013187816A - Monitoring and control system, monitoring and control apparatus, and polling control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the conventional monitoring and control systems in which: with the increased number of transmission devices, the number of polling operations that a monitoring and control apparatus need to perform increases in order to ensure reliable monitoring, which leads to increased network load and server processing load for monitoring the transmission devices.SOLUTION: In a monitoring and control system comprising a plurality of transmission devices connected to a network and a monitoring and control apparatus for monitoring and controlling the plurality of transmission devices, the monitoring and control apparatus includes polling means that changes the number of polling operations per unit time for each of the plurality of transmission devices depending on its level of importance.

Description

  The present invention relates to a polling control technique used in a monitoring control system including a plurality of transmission apparatuses that form a redundant network between user terminals and a monitoring control apparatus that monitors and controls these transmission apparatuses. .

  In general, a plurality of transmission apparatuses constituting a relay / transmission network of the Internet or a leased line network are often configured by a ring network, and signal routes are made redundant in order to improve system reliability.

  For example, in the case of FIG. 11, the user terminal 901 and the user terminal 902 are connected via six transmission apparatuses 904. Then, the user terminal 901 is connected to the transmission device 904_1, the user terminal 902 is connected to the transmission device 904_6, and the six transmission devices 904 from the transmission device 904_1 to the transmission device 904_6 constitute the ring network 903. It is made redundant. In addition, when the description common to 6 units from the transmission apparatus 904_1 to the transmission apparatus 904_6 is performed, (_number) at the end of the code is omitted and described as the transmission apparatus 904, and when referring to a specific transmission apparatus 904, the end of the code (_Number) is added to, for example, a transmission device 904_1.

  In the example of the monitoring control system 900 shown in FIG. 12, the monitoring control device (server) 911 for monitoring and controlling the six transmission devices 904 is connected to each transmission device 904 via the monitoring control network 913 indicated by a dotted line. It is connected to the. Here, the same reference numerals as those in FIG. 11 denote the same components. In FIG. 12, since six transmission apparatuses 904 are arranged at physically separated locations, a server 911 is arranged as an operation system for integrating and monitoring them, and a control terminal (connected to the server 911 ( A client) 912 is operated by an operator to manage the monitoring control system 900.

  In this way, each transmission apparatus 904 is monitored by polling periodically transmitted from the server 911 connected via the monitoring control network 913 indicated by a dotted line (see, for example, Patent Documents 1 and 2). .

Japanese Patent Application No. 2003-529706 JP 2007-282153 A

  Conventionally, the number of transmission apparatuses 904 that must be monitored and controlled by the server 911 that is a monitoring control apparatus is about several hundreds. However, the number of installation positions of the server 911 due to physical restrictions is reduced, and different networks are integrated. The number of transmission apparatuses 904 that must be monitored and controlled by a single server 911 has increased to several thousand.

  In order to maintain the same reliability as in the past with respect to the increase in the number of transmission apparatuses 904 that have to be monitored and controlled, one monitoring control apparatus (server 911) that monitors the transmission apparatus 904 has to This increases the total number of polls that must be performed. For this reason, problems such as an increase in the load on the monitoring control network 913 for monitoring the transmission apparatus 904 and an increase in the processing load on the server 911 arise.

  In view of the above problems, an object of the present invention is to provide a monitoring control system capable of reducing the load on the monitoring control network and the processing load on the server by reducing the total number of polling operations while maintaining the reliability of network monitoring. And a monitoring control device and a polling control method.

  The supervisory control system according to the present invention is a supervisory control system comprising a plurality of transmission devices that connect user terminals with redundant routes, and a supervisory control device that monitors and controls the plurality of transmission devices. The supervisory control device sets the number of polls per unit time according to the importance of the plurality of transmission devices.

  In particular, the redundant route is composed of an active route and a standby route, and the monitoring and control device sets the standby route more than the number of polls for each of the transmission devices arranged in the active route. The polling frequency for each of the arranged transmission apparatuses is set to be small.

  Further, the supervisory control device weights a first value for the transmission device in the active route and a second value for the transmission device in the standby route, respectively, An addition value of the first value and the second value is obtained every time, and the larger the addition value, the more the number of polling of the transmission apparatus is set.

  In particular, the monitoring and control apparatus obtains a relative value based on the maximum value of the plurality of addition values for each transmission apparatus, and performs polling per unit time set in advance necessary for maintaining network reliability. A value obtained by multiplying the number of times by the relative value is set as the number of polling times of the transmission apparatus.

  Further, the monitoring control device, when the transmission route of the main signal is switched from the active route to the standby route, the number of polling for the transmission device arranged in the active route, the standby route And resetting the number of polling for the transmission apparatus arranged in the network.

  A monitoring control device according to the present invention is a monitoring control device that monitors and controls a plurality of transmission devices that connect user terminals with a redundant route. In accordance with the importance of the plurality of transmission devices, the monitoring control device per unit time A polling control unit for setting the number of polling is provided.

  In particular, the redundant route is composed of an active route and a standby route, and the polling control unit sets the standby route more than the number of polls for each transmission device arranged in the active route. The polling frequency for each of the arranged transmission apparatuses is set to be small.

  Further, the polling control unit weights a first value for the transmission device in the active route and a second value for the transmission device in the standby route, and transmits the transmission device to the transmission device. An addition value of the first value and the second value is obtained every time, and the larger the addition value, the more the number of polling of the transmission apparatus is set.

  In particular, the polling control unit obtains a relative value based on a maximum value of a plurality of the added values for each of the transmission devices, and performs polling per preset unit time necessary for maintaining network reliability. A value obtained by multiplying the number of times by the relative value is set as the number of polling times of the transmission apparatus.

  Further, the polling control unit, when the transmission route of the main signal is switched from the active route to the standby route, the number of polling for the transmission device arranged in the active route, and the standby route And resetting the number of polling for the transmission apparatus arranged in the network.

  The polling control method according to the present invention is a polling control system comprising a plurality of transmission devices that connect user terminals with redundant routes, and a monitoring control device that monitors and controls the plurality of transmission devices. In the control method, the number of polls per unit time is set according to the importance of the plurality of transmission apparatuses.

  In particular, the network is made redundant into an active route and a standby route, and the number of polls for the transmission device arranged in the standby route rather than the number of polls for the transmission device arranged in the active route. It is characterized by reducing.

  Further, when the transmission route of the main signal is switched from the active route to the standby route by switching between the active route and the standby route, the number of polls to the transmission device arranged in the active route And the number of polls for the transmission device arranged in the standby route are switched.

  In particular, the first value is weighted for the transmission device in the active route, the second weight is given to the transmission device in the standby route, and the first value is assigned to each transmission device. An addition value of the value and the second value is obtained, and the number of times of polling is determined according to the addition value.

  In addition, a value obtained by multiplying the relative value by a preset number of polling per unit time necessary for maintaining the reliability of the network, by obtaining a relative value based on the maximum added value for each transmission device. Is the number of polling times of the transmission apparatus.

  The monitoring control system, the monitoring control apparatus, and the polling control method according to the present invention reduce the number of polls from the monitoring control apparatus to the transmission apparatus by changing the number of polling according to the importance of the route in which the transmission apparatus is arranged. It is possible to reduce the monitoring network load and the server processing load. And, by changing the importance of the transmission device in conjunction with route switching and maintaining the optimal number of polls, the load on the network and server processing load can be reduced without degrading the reliability of network monitoring. can do.

1 is a diagram illustrating a configuration example of a monitoring control system 100. FIG. 3 is a diagram illustrating a configuration example of a server 111 and a transmission apparatus 104. FIG. It is a figure which shows an example of an active system route and a standby system route. It is a figure which shows the example of weighting. It is a figure which shows an example of the frequency | count of polling per unit time. It is a figure which shows the other example of weighting. It is a figure which shows an example of route switching. It is a figure which shows the example of weighting after route switching. It is a figure which shows an example of the frequency | count of polling per unit time after route switching. It is a flowchart of a polling process. It is a figure which shows the example of a network made redundant. 2 is a diagram illustrating a configuration example of a monitoring control system 900. FIG.

  Hereinafter, embodiments of a monitoring control system, a monitoring control apparatus, and a polling control method according to the present invention will be described in detail.

  FIG. 1 is a diagram illustrating a configuration example of a monitoring control system 100 according to the present embodiment. In FIG. 1, a monitoring control system 100 includes six transmission apparatuses 104 and six transmission apparatuses 104 that form a ring network 103 (user signal route indicated by a solid line) between a user terminal 101 and a user terminal 102. And a monitoring control device (server 111) that transmits and receives monitoring control signals via a monitoring control network 113 (monitoring control route indicated by a dotted line) connected to the network. In the example of FIG. 1, for the sake of easy understanding, a simple configuration in which two user terminals 101 and 102 are simply connected by six transmission devices 104 is shown. Absent.

  Here, similarly to FIG. 11 and FIG. 12 described in the related art, when description common to six units from the transmission device 104_1 to the transmission device 104_6 is performed, (_number) at the end of the code is omitted and the transmission device 104 is omitted. When a specific transmission device 104 is indicated, (_number) is added to the end of the code, for example, the transmission device 104_1.

  In FIG. 1, the server 111 periodically transmits a polling signal for confirming the operation state of each transmission apparatus 104 via the monitoring control network 113, and operates according to the response signal returned from each transmission apparatus 104. To monitor. For this reason, when the number of transmission apparatuses 104 that must be managed increases, the server 111 increases the processing load for executing polling and frequently transmits and receives polling signals and response signals. The load on the control network 113 also increases. In general, since the monitoring control network 113 uses the ring network 103 in-band, there are problems such as a narrow communication path and a delay in transmission / reception of other control signals such as alarms. And in order to reduce these loads, when the number of polling is simply reduced, there arises a problem that the reliability of network monitoring is lowered.

  Therefore, in the monitoring control system 100 according to the present embodiment, importance is assigned to the subordinate transmission apparatus 104, and weighting is performed according to the importance. Then, by determining the number of polls per unit time in accordance with the weighting, the conventional number of polls is executed for the transmission device 104 with high importance, and the number of polls for the transmission device 104 with low importance. Reduce. As a result, it is possible to reduce the load on the network and the processing load on the server for monitoring while maintaining the reliability of the network monitoring.

  Next, configuration examples of the server 111 and the transmission apparatus 104 will be described with reference to FIG. The blocks with the same reference numerals as those in FIG.

  In FIG. 2, the server 111 includes a control unit 201, a monitoring communication unit 202, and a client IF 203. In addition, the transmission apparatus 104 includes a control unit 301, a monitoring communication unit 302, and a data communication unit 303. Note that the configurations of the server 111 and the transmission apparatus 104 in FIG. 2 only describe portions necessary for the description of the present embodiment, and blocks necessary for the operation of transmitting and receiving user data are omitted.

  The control unit 201 of the server 111 is connected to the client (control terminal) 112 via the client IF 203. Then, the operator monitors and manages the operation state of each transmission apparatus 104 with the client 112, transmits a control command as necessary, and changes the setting and operation state of the transmission apparatus 104. In particular, in the monitoring control system 100 according to the present embodiment, the server 111 periodically transmits a polling signal to each transmission device 104 via the monitoring communication unit 202, and a response signal returned from each transmission device 104. Thus, the operating state of the transmission apparatus 104 is monitored. Further, the server 111 receives an alarm signal from the transmission device 104 via the monitoring communication unit 202, and causes a failure of the transmission device 104 or a change in the communication route of the data communication unit 302 (switching from the active system to the standby system). ) And other information.

  On the other hand, the transmission device 104 outputs a polling signal received from the server 111 via the monitoring communication unit 302 to the control unit 301, and the control unit 301 sends a response signal including information indicating the state of the own device to the monitoring communication unit. It returns to the server 111 via 302. The control unit 301 of the transmission device 104 transmits an alarm signal to the server 111 via the monitoring communication unit 302 when an abnormality occurs in the communication state of the data communication unit 302 or the state of the own device. For example, the control unit 301 automatically switches to the standby communication route when an abnormality occurs in the active communication route of the data communication unit 302. At this time, the control unit 301 notifies the server 111 that the operation system has switched to the standby system. Notice. Alternatively, the operator manually transmits a route switching command from the active system to the standby system from the control terminal of the client 112 connected to the server 111, and the control unit 301 of the transmission apparatus 104 that receives the command transmits the route switching command of the data communication unit 302. Switch the communication route from active to standby.

  In this way, the communication route of the transmission apparatus 104 can be switched from the active system to the standby system, and when the failure of the active system is resolved, the standby system can be returned to the active system.

  FIG. 3 is a diagram similar to the monitoring control system 100 of FIG. 1, and shows an example of a connection route from the user terminal 101 to the user terminal 102, and the route A and the route B are made redundant. In FIG. 3, a route A indicated by a thick solid arrow indicates a main signal path for transmitting / receiving user data, and the user passes through the transmission device 104_1, the transmission device 104_2, the transmission device 104_3, and the transmission device 104_6. This is a path for performing communication between the terminal 101 and the user terminal 102. On the other hand, a route B indicated by a thick dotted arrow indicates a standby path of a main signal for transmitting and receiving user data, and is connected to the user terminal 101 via the transmission device 104_1, the transmission device 104_4, the transmission device 104_5, and the transmission device 104_6. This is a path for communicating with the user terminal 102.

  Here, the control unit 201 of the server 111 determines the number of polls per unit time for each transmission apparatus 104. FIG. 4 shows an example of relative values that are assigned weighted addition values according to the importance of the six transmission devices 104 from the transmission device 104_1 to the transmission device 104_6 and normalized by the maximum weighted addition value. It is assumed that the weighted addition value of each transmission device 103 is set in advance in the server 111 and held in the internal memory of the control unit 201 or the like.

  For example, the setting method of the weighted addition value in the case of the monitoring control system 100 of FIG. 3 is performed as follows. In FIG. 3, the transmission device 104_1 and the transmission device 104_6 are connected to the user terminal 101 and the user terminal 102, respectively, and are used in both the route A and the route B. In the example of FIG. 3, since route A is the active system and route B is the standby system, the active transmission device 104_2 and the transmission device 104_3 are assigned a higher importance level: 2 than the standby transmission device 104. Further, the standby transmission device 104_4 and the transmission device 104_5 of the route B are assigned the lowest importance level: 1.

FIG. 4 shows an example in which weighted addition values are assigned to the six transmission apparatuses 104 in FIG. 3 in this way. Further, in FIG. 4, since the maximum value of the weighted addition value among the six transmission devices 104 is 3 (transmission device 104_1 and transmission device 104_6), each weighted addition value is normalized by the maximum value of 3 to obtain a relative value. . The relative value of each transmission device 104 can be obtained by the following (Equation 1).
Relative value = (weighted addition value of each transmission device) / (maximum weighted addition value) (Equation 1)
In the example of FIG. 4, since the relative value of the transmission device 104_1 and the transmission device 104_6 is 1, and the relative value of the transmission device 104_2 and the transmission device 104_3 is 2/3, the relative value of the transmission device 104_4 and the transmission device 104_5 is approximately 0.67. Since it is 1/3, it becomes about 0.33.

And the control part 201 of the server 111 calculates the frequency | count of polling which should be performed per unit time (1 hour) from the relative value of each transmission apparatus 104 calculated | required in FIG. Here, if the number of polling times per unit time sufficient to maintain the reliability of the network is N times, the number of polling times of each transmission device 104 can be obtained by (Equation 2).
Polling count = N × (relative value of each transmission device) (Expression 2)
In the monitoring control system 100 according to the present embodiment, for example, 60 polling times are required per unit time (1 hour) to maintain the reliability of the network. Is calculated as follows. Note that the number of polling times required to maintain the reliability of the network is, for example, network design information (information such as the arrangement of the transmission apparatus 104, the connection positions of the user terminals 101 and 102, route settings of the active system and the standby system, etc.) And past statistical information (information such as the frequency of failure occurrence).

  FIG. 5 shows an example in which the number of polling of each transmission device 104 is obtained by (Equation 2) using N = 60 and the relative value obtained in FIG. In FIG. 5, the number of polling per unit time of the transmission device 104_1 and the transmission device 104_6 having a relative value of 1 is 60 times, and the unit time of the transmission device 104_2 and the transmission device 104_3 having a relative value of 0.67 (2/3). Is 40 times, and the polling times per unit time of the transmission device 104_4 and the transmission device 104_5 having a relative value of 0.33 (1/3) are 20.

  In this way, by varying the number of polls per unit time according to the importance of the transmission device 104, the transmission device 104 with a high degree of importance performs polling with the number of polling times that can maintain the reliability of the network. By reducing the number of polling times of the transmission apparatus 104 having a low degree, the total number of polling times in the entire monitoring control system 100 can be greatly reduced.

  For example, in the conventional system, since the number of polling times per unit time for six transmission devices 104 is 60 times, polling of 60 × 6 = 360 times is necessary for the entire system. In the monitoring control system 100, the number of polling can be reduced to 2/3 of 60 + 40 + 40 + 20 + 20 + 60 = 240 times.

  In the above example, the maximum weighted addition value is assigned to the transmission apparatus 104_1 and the transmission apparatus 104_6 at the edge connected to the user terminal 101 and the user terminal 102. However, as shown in FIG. The weighted addition value: 2 may be assigned to the transmission device 104_1, the transmission device 104_2, the transmission device 104_3, and the transmission device 104_6, and the weighted addition value: 1 may be assigned to the transmission device 104_4 and the transmission device 104_5 of the standby system only. In this case, the relative value of the transmission device 104_4 and the transmission device 104_5 is 0.5, and the number of polling times is reduced to half. In the above example, the difference between the weighted addition values of the active and standby transmission apparatuses 104 is 1. However, the difference may be 2 or more. In any case, the effect of reducing the total number of polling is obtained.

[Operation when switching routes]
Next, the operation of the polling process when switching to the standby route when a failure occurs in the active route will be described. FIG. 7 is a diagram of the supervisory control system 100 corresponding to FIG. Note that the same reference numerals as those in FIG.

  FIG. 7 is a diagram illustrating a state after a failure occurs in the active route A in FIG. 3 and the transmission device 104_1 and the transmission device 104_6 perform route switching. The route switching may be automatically performed by the transmission device 104 when a failure occurs, or the route switching may be controlled from the monitoring control device (server) 111 side.

  In FIG. 7, on the contrary to the case of FIG. 3, a route B indicated by a thick solid line arrow indicates an operation path of a main signal for transmitting and receiving user data. The transmission device 104_1, the transmission device 104_4, and the transmission device 104_5 And a path for performing communication between the user terminal 101 and the user terminal 102 via the transmission device 104_6. On the other hand, a route A indicated by a thick dotted arrow indicates a standby path of a main signal for transmitting and receiving user data, and is connected to the user terminal 101 via the transmission device 104_1, the transmission device 104_2, the transmission device 104_3, and the transmission device 104_6. This is a path for communicating with the user terminal 102.

  Here, the control unit 201 of the server 111 is notified, for example, as an alarm signal from the transmission device 104_1 and the transmission device 104_6 that the active system is changed from the route A to the route B and the standby system is switched from the route B to the route A. . Alternatively, an alarm signal notifying only the occurrence of a failure in the active route may be transmitted from the active transmission device 104 to the server 111, and the server 111 may perform control to switch the active route and the standby route. Instead, the operator may issue a control command from the client 112 to the transmission apparatus 104 to manually switch the operation system and standby system routes. In any case, the control unit 201 of the server 111 recognizes that route switching has occurred, reviews the importance for each transmission device 104, and resets the number of polls per unit time.

  FIG. 8 is a diagram corresponding to FIG. 4, in which weighted addition values are assigned according to the importance of the six transmission apparatuses 104 from the transmission apparatus 104_1 to the transmission apparatus 104_6, and normalized relative to the maximum weighted addition value. An example is shown. In the example of FIG. 8, the transmission device 104_1 and the transmission device 104_6 are connected to the user terminal 101 and the user terminal 102, respectively, and are used in both the route A and the route B, so the importance level remains at 3. Since the route A is switched to the standby system and the route B is switched to the active system, the importance of the transmission device 104_4 and the transmission device 104_5 of the new active system route B is increased from 1 to 2 in FIG. Similarly, the importance of the transmission device 104_2 and the transmission device 104_3 of the route A that has become a standby system is lowered from 2 to 1 in FIG.

  Furthermore, the relative value calculated | required by (Formula 1) demonstrated previously is changed with the change of a weighted addition value. In the example of FIG. 8, the relative value of the transmission device 104_1 and the transmission device 104_6 does not change with 1, the relative value of the transmission device 104_2 and the transmission device 104_3 becomes 1/3 and is reduced to about 0.33, and the transmission device 104_4 and The relative value of the transmission device 104_5 becomes 2/3 and increases to about 0.67.

  Then, similarly to FIG. 5, the control unit 201 of the server 111 obtains the number of polls to be executed per unit time from the relative value of each transmission device 104 obtained in FIG. Here, the polling count N per unit time sufficient to maintain the reliability of the network is 60.

As a result, as shown in FIG. 9, the number of polling per unit time of the transmission device 104_1 and the transmission device 104_6 having a relative value of 1 remains 60 times, and transmission of the relative value: 0.33 (1/3). The number of polling times per unit time of the device 104_2 and the transmission device 104_3 is decreased from 40 times to 20 times, and the number of polling times per unit time of the transmission device 104_4 and the transmission device 104_5 of relative value: 0.67 (2/3) is Increase from 20 to 40 times.
[Polling process flow]
Next, the flow of the polling process will be described using the flowchart of FIG. Note that the flowchart of FIG. 10 is a process executed mainly by the control unit 201 of the server 111 that is a monitoring control device. Steps S101 to S103 are initial processes executed when the system is started. During operation, the processes from step S104 to step S108 are repeatedly executed. Here, in the flowchart of FIG. 10, each process is drawn in a continuous flowchart format, but in actuality, when a polling is executed by a timer interrupt or a route switching interrupt occurs, steps S106 to S108 are executed. It is a mechanism to be done.

  Hereinafter, it demonstrates in order according to the flowchart of FIG.

  (Step S <b> 101) The control unit 201 calculates a weighted addition value according to the importance of the plurality of transmission apparatuses 104 accommodated under the control. Note that the weighted addition value may be stored in advance in the internal memory of the control unit 201 as a table, or from the network configuration of the monitoring control system 100 (such as the operation route, the standby route, and the arrangement of the transmission device 104). The importance may be determined and calculated.

  (Step S <b> 102) The control unit 201 calculates a relative value for each transmission device 104 as described with reference to FIG. 4.

  (Step S103) As described with reference to FIG. 5, the control unit 201 calculates the number of polls per unit time of each transmission apparatus 104 and sets a polling number table.

  (Step S <b> 104) The control unit 201 refers to the polling frequency table and performs polling by timer interruption or the like so that the number of polling times per unit time set for each transmission apparatus 104 is reached.

  (Step S105) The control unit 201 determines whether route switching has occurred. If route switching has occurred, the control unit 201 proceeds to step S106. If route switching has not occurred, the control unit 201 returns to step S104 and performs each polling number table according to the polling count table. The process of polling the transmission apparatus 104 is repeated. Note that the process of step S105 may be performed by an interrupt process using a route switching alarm signal or the like.

  (Step S106) The control unit 201 calculates a weighted addition value according to the importance of each transmission apparatus 104, as in step S101. Here, as described with reference to FIG. 8, the importance of each transmission apparatus 104 is changed according to route switching.

  (Step S107) The control unit 201 calculates the relative value of each transmission device 104 in the same manner as in step S102.

  (Step S108) As in step S103, the control unit 201 calculates the number of polls according to the relative value of each transmission apparatus 104, and updates the polling number table.

  As described above, the monitoring control system 100 according to the present embodiment sets the number of polls per unit time according to the importance of the transmission device 104 even when the route is switched from the active system to the standby system or from the standby system to the active system. By changing the variable, the transmission device 104 with high importance can perform polling with the number of polling times that can maintain the reliability of the network, and by reducing the number of polling of the transmission device 104 with low importance, the monitoring control system The total number of polls in the entire 100 can be greatly reduced.

  As described above, the monitoring control system 100 according to the present embodiment changes the polling frequency according to the importance of the route in which the transmission apparatus is arranged, thereby total polling from the monitoring control apparatus to the transmission apparatus. The number of times can be reduced, and the monitoring network load and the server processing load can be reduced. Then, by changing the importance of the transmission device in conjunction with the route switching, it is possible to reduce the monitoring network load and the server processing load without reducing the reliability of network monitoring.

  Although the monitoring control system, the monitoring control apparatus, and the polling control method according to the present invention have been described with reference to the respective embodiments, the monitoring control system, the monitoring control apparatus, and the polling control method are implemented in various other forms without departing from the spirit or main features thereof. be able to. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The present invention is defined by the claims, and the present invention is not limited to the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

100, 900 ... supervisory control systems 101, 102, 901, 902 ... user terminals 103, 903 ... ring network 104, 904 ... transmission devices 110, 910 ... supervisory control devices 111, 911, .. Servers 112, 912 ... Clients 113, 913 ... Monitoring control network 201 ... Control unit 202 ... Monitoring communication unit 203 ... Client IF
301 ... Control unit 302 ... Monitoring communication unit 303 ... Data communication unit

Claims (15)

In a monitoring control system comprising a plurality of transmission devices that connect user terminals with a redundant route, and a monitoring control device that monitors and controls the plurality of transmission devices,
The monitoring and control apparatus sets the number of polling per unit time according to the importance of the plurality of transmission apparatuses. In the supervisory control system according to claim 1,
The redundant route is composed of an active route and a standby route,
The monitoring control device sets the number of polling for each transmission device arranged in the standby route less than the number of polling for each transmission device arranged in the active route. Control system. In the monitoring control system according to claim 2,
The supervisory control device weights a first value for the transmission device in the active route and a second value for the transmission device in the standby route, and sets the weight for each transmission device. A monitoring control system characterized in that an addition value of the first value and the second value is obtained, and the polling number of the transmission apparatus is set to be larger as the addition value is larger. In the supervisory control system according to claim 3,
The monitoring and control apparatus obtains a relative value based on the maximum value of the plurality of addition values for each of the transmission apparatuses, and sets a predetermined number of polling per unit time necessary for maintaining the reliability of the network. A value obtained by multiplying the relative value is set as the number of polling times of the transmission apparatus. In the supervisory control system according to any one of claims 2 to 4,
The monitoring and control device, when the transmission path of the main signal is switched from the active route to the standby route, the number of polling for the transmission device arranged in the active route, and placed in the standby route And resetting the number of times of polling the transmission apparatus. In a monitoring control device that monitors and controls a plurality of transmission devices that connect user terminals with a redundant route,
A monitoring control apparatus, comprising: a polling control unit that sets the number of polling per unit time according to the importance of the plurality of transmission apparatuses. In the monitoring control device according to claim 6,
The redundant route is composed of an active route and a standby route,
The polling control unit sets the polling frequency for each transmission device arranged in the standby route less than the polling frequency for each transmission device arranged in the active route. Control device. In the monitoring control device according to claim 7,
The polling control unit weights a first value for the transmission device in the active route, and a second value for the transmission device in the standby route, for each transmission device. The monitoring control device, wherein an addition value of the first value and the second value is obtained, and the polling number of the transmission device is set to be larger as the addition value is larger. In the monitoring control device according to claim 8,
The polling control unit obtains a relative value based on the maximum value of the plurality of addition values for each transmission device, and sets a predetermined number of polling per unit time necessary for maintaining the reliability of the network. A value obtained by multiplying the relative value is set as the number of polling times of the transmission apparatus. In the monitoring control device according to any one of claims 7 to 9,
When the main signal transmission path is switched from the active route to the standby route, the polling control unit is arranged in the standby route and the number of polls for the transmission device placed in the active route. And resetting the number of polling for the transmission apparatus. In a polling control method of a monitoring control system comprising a plurality of transmission devices that connect user terminals with a redundant route, and a monitoring control device that monitors and controls the plurality of transmission devices,
A polling control method, wherein the number of polls per unit time is set according to the importance of the plurality of transmission apparatuses. In the polling control method according to claim 11,
The network is made redundant to an active route and a standby route, and the polling frequency for the transmission device arranged in the standby route is less than the polling frequency for the transmission device arranged in the active route. A polling control method characterized by: In the polling control method according to claim 12,
When the transmission route of the main signal is switched from the active route to the standby route by switching between the active route and the standby route, the number of polling for the transmission device arranged in the active route and the A polling control method, wherein the polling frequency for the transmission device arranged in the standby route is switched. In the polling control method according to claim 13,
A weight is assigned to the first value for the transmission device in the active route, a second weight is assigned to the transmission device in the standby route, and the first value is determined for each transmission device. A polling control method, comprising: obtaining an added value of the second value; and determining the number of times of polling according to the added value. In the polling control method according to claim 14,
A relative value based on the maximum added value is obtained for each transmission device, and a value obtained by multiplying the preset number of polling per unit time necessary for maintaining the reliability of the network by the relative value is A polling control method characterized in that the polling frequency of a transmission device is used.

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