JP2970591B2 - Redundant transmission monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system for monitoring the operation state of a monitored device communicating via a transmission line, and more particularly to a lower monitoring device for monitoring the operation of the monitored device at both ends of the transmission line. And a transmission redundant monitoring system provided with the same.

[0002]

2. Description of the Related Art As a technique for monitoring a transmission line, a lower monitoring device is installed at each end of a transmission line to improve monitoring reliability, and a higher monitoring device that monitors alarm information from each lower monitoring device is used. Double monitoring is provided.

In the dual monitoring as described above, when information indicating that a fault has occurred in one of the monitored devices is obtained from one of the monitored devices, the information is monitored by referring to the information from the other monitoring device. The status of the device and the transmission path itself can be monitored. When information indicating that a particular monitored device is faulty can be obtained from any of the lower monitoring devices, it can be assumed that the monitored device itself has failed, and the information can be identified only from one of the lower monitoring devices. When information indicating that the monitored device has a failure is obtained, it can be assumed that a failure has occurred in the transmission path.

In performing double monitoring, it is necessary to provide a switching unit for switching two transmission lines from each lower monitoring device in the upper monitoring device and to switch the lower monitoring device that receives information by a switching signal from the outside. Have been done.

Further, in the case of a communication system having no switching unit as described above and having a configuration in which alarm information is simultaneously sent from each lower-level monitoring device, it is determined whether the information is from one of the lower-level monitoring devices. It needs to be identified.

For a particular monitored device, both the address in the higher-level monitoring device and the address in each of the two lower-level monitoring devices must be the same. Each monitoring device attaches different address information to the address information of the device, and transmits it to the host device.

[0007]

Among the above-mentioned prior arts in which a switching unit is provided, the monitoring path is switched by the switching detection unit in response to an external switching signal. If a switching signal cannot be received from the outside, switching cannot be performed until the fault is recovered, and furthermore, if a fault occurs in the monitored transmission path, the transmission path cannot be monitored. There is a problem.

In a higher-level monitoring terminal having no switching mechanism, when one alarm occurs on a transmission line, the lower-level monitoring devices at both ends add respective addresses to the higher-level monitoring device. For reporting, the higher-level monitoring terminal recognizes that the alarm is different from the actual one, and displays the alarm on the display device as two alarms. As a result, there is a problem that it is confusing when the maintenance is performed by the host monitoring device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and uses a switching detection unit and an external switching signal in an upper monitoring terminal having a redundant monitoring path. Instead, the current alarm information can be accurately monitored and an alarm when a failure occurs in the monitored device can be reported as one alarm.
It is an object of the present invention to realize a redundant transmission monitoring system capable of displaying alarm information without requiring a switching operation even when a failure occurs in one of the monitoring paths.

[0010]

SUMMARY OF THE INVENTION A redundant transmission monitoring system according to the present invention is provided at both ends of a transmission line, monitors the operation state of monitored devices connected by the transmission line, and outputs alarm information. In a transmission redundant monitoring system including a device and a higher-level monitoring device that monitors the status of a monitored device or a transmission line based on alarm information from each lower-level monitoring device, each of the lower-level monitoring devices generates an alarm when outputting alarm information. The self-monitoring device assigns its own address to the address indicating the monitored device, and outputs the address.
When the address indicating the monitored device in the alarm information sent from each lower monitoring device matches, it is determined that a failure has occurred in the monitored device to which the address is assigned, and the alarm information is sent from each lower monitoring device. If the addresses indicating the monitored devices in the alarm information do not match, it is determined that the transmission path is faulty.

In this case, the higher-level monitoring device receives an address database that stores, for each monitored device, an address different for each lower-level monitoring device that has output the alarm information, and receives alarm information from each lower-level monitoring device. If the address indicating the monitored device matches with reference to the address database, it is determined that the monitored device to which the address is assigned is a fault, and the alarm information transmitted from each lower monitoring device is determined. When the addresses indicating the monitored devices do not match, an alarm determination processing task for determining that a transmission path failure has occurred and a display display task for displaying a determination result of the alarm determination processing task may be provided.

[Operation] In the present invention configured as described above, monitoring can be performed without providing a switching detection unit, and the address indicating the monitored device in the alarm information sent from each lower monitoring device is identical. In this case, it is determined that the monitored device to which the address has been assigned is a fault, so that the same number of alarm reports as the number of alarms actually occurring can be made in subsequent displays and the like.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the configuration and operation of an embodiment of the present invention. FIG. 1A is a block diagram showing the configuration of the apparatus, and FIG. FIG. 7 is a diagram for explaining addresses of monitored devices to be monitored.

In this embodiment, as shown in FIG.
It comprises a station, a station B, and a higher-level monitoring device 31 for monitoring the communication status between these stations. Station A
The first switching device 11 includes devices a to d as monitored devices accommodated in the first switching device 11 and a lower monitoring device SVa that monitors the devices a to d via the first switching device 11. Then, the station B monitors the second switch 21, the devices eh as the monitored devices accommodated in the second switch 21, and the devices eh through the second switch 21. Subordinate monitoring device SV
b.

A transmission line is formed between each of the devices a to d and each of the devices e to h. The devices a to h are monitored. Also, when sending the alarm of the device to the upper-level monitoring device 31, the lower-level monitoring devices SVa and SVb include an address (in this embodiment, “a”, “B”) is added and transmitted.
The method of monitoring the devices a to h and the transmission path by the lower monitoring devices SVa and SVb is performed by a generally known technique, and a description thereof will be omitted.

FIG. 2A shows the upper monitoring device 31 in FIG.
3 is a diagram showing a configuration of a higher-level monitoring terminal alarm processing unit 101 provided as a main part thereof. Alarm processing unit 101
As shown in the figure, an alarm determination processing task 44 and a display display processing task 45 include an alarm display processing unit 102 and an alarm reception processing unit 43.

The host monitoring device 31 has an address database (not shown) for registering the addresses of the devices a to h in addition to the above-described host monitoring terminal alarm processing unit 101. As shown in FIG. 1B, the addresses of the devices a to h are “aa”, “ab”,
.., And “ba”, “bb”, “bc”... With respect to the address via the lower-level monitoring device SVb. 2
Are registered one by one.

Next, a processing method from generation of an alarm to display of an alarm according to an embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 2A, when the “0001” alarm occurs in the device a (“000”
1 "indicates the content of the fault), and the lower-level monitoring device SVa and the lower-level monitoring device SVb that have received the alarm have alarm information" aa: 0 "added with an address indicating the path of the lower-level monitoring device.
"001" and "ba: 0001" are notified to the upper monitoring terminal 31.

In the upper monitoring terminal alarm processing section 101 in the upper monitoring terminal 31, first, the alarm information "aa: 0001" and "ba: 0001" notified from the lower monitoring apparatuses SVa and SVb by the alarm reception processing section 43. Is received and notified to the alarm display processing unit 102. In the alarm display processing unit 102, the content of the notified alarm information is determined by the alarm determination processing task 44.

The alarm determination task 44 refers to the contents stored in the address database described above, and notifies the notified alarm information "aa: 0001" and "ba: 000".
Since both the address information “aa” and “ba” included in “1” are registered for the device a,
It is determined that the alarm information of “a: 0001” and “ba: 0001” indicates that a failure of “0001” has occurred in the device a, and information indicating “a device: 0001 alarm” is used as information indicating that. A notification is given to the display task 45. In the display task 45 receiving the information, a display (not shown) such as shown in FIG.

Also, unlike the above case, when a failure occurs in the transmission line, the address given to the device in the alarm information notified from each of the lower monitoring devices SVa and SVb is different. From this, the alarm determination processing task 44 determines that a failure has occurred in the transmission path, gives information to that effect to the display display task 45, and displays on the display indicating the transmission path failure.

[0023]

Since the present invention is configured as described above, it has the following effects.

The current alarm information can be accurately monitored without using a switching detection unit and a switching signal from the outside, and an alarm when a failure occurs in the monitored device can be reported as one alarm. Even if a failure occurs in one of the monitoring paths, there is an effect that alarm information can be displayed without requiring a switching operation.

[0025]

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams showing the configuration and operation of an embodiment of the present invention, wherein FIG. 1A is a block diagram showing a device configuration, and FIG. 1B is a diagram for explaining addresses generated in the embodiment. .

2 (a) is provided in a higher-level monitoring device 31 shown in FIG. 1, and is a higher-level monitoring terminal alarm processor 101 which is a main part thereof.
(B) is a diagram showing the display contents according to the command at this time.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 1st switching device 21 2nd switching device 31 Upper monitoring terminal ah device SVa, SVb Lower monitoring device 43 Alarm reception processing part 44 Alarm judgment processing task 45 Display display processing part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04L 12/437

Claims (2)

(57) [Claims] 1. A lower monitoring device which is provided at both ends of a transmission line and monitors the operation state of a monitored device connected by the transmission line and outputs alarm information, and a lower monitoring device which receives alarm information from each lower monitoring device. In a redundant transmission monitoring system including a monitoring device or a higher-level monitoring device that monitors the status of a transmission path, each of the lower-level monitoring devices assigns its own address to an address indicating a monitored device where an alarm has occurred when outputting alarm information. If the address indicating the monitored device in the alarm information sent from each lower monitoring device matches, the higher-level monitoring device determines that the monitored device assigned the address has a fault. If the address indicating the monitored device in the alarm information sent from each lower monitoring device does not match, it is determined that the transmission line is faulty. Transmission redundant monitoring system for the butterflies. 2. The redundant transmission monitoring system according to claim 1, wherein the higher-level monitoring device stores, for each of the monitored devices, an address database that stores a different address for each lower-level monitoring device that has output the alarm information; When the alarm information is transmitted from the device, the address database is referred to, and if the address indicating the monitored device matches, it is determined that a failure has occurred in the monitored device to which the address is assigned, and An alarm judgment processing task for judging that a transmission path failure has occurred if the address indicating the monitored apparatus in the alarm information sent from the monitoring apparatus does not match; and a display display for displaying the judgment result of the alarm judgment processing task. A redundant transmission monitoring system having a task.