JPH03179826A - Alarm restoration monitoring system - Google Patents

Abstract

PURPOSE:To monitor alarm information at the point of time of polling by storing the content of reply of a replying means with respect to a preceding polling, alarm information fed subsequent the preceding polling and alarm information of a monitored device at the point of time of polling. CONSTITUTION:A monitoring device 12 monitors the alarm information of a monitored device 11 such as a multilexer and an optical repeater, stores required information to discriminate the generation and restoration of the alarm information. When the alarm information is outputted from the monitored device 11, the accumulating alarm buffer 17 of a storage section 14 of the monitoring device 12 latches the information up to a succeeding polling and a preceding alarm information buffer 18 latches the information replied with the polling. Moreover, a current alarm information buffer 19 latches the alarm information outputted from the monitored device 11 as current alarm information while updating it sequentially. Thus, the occurrence state of the alarm at the point of times is replied with the polling from a central supervisory equipment 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an alarm recovery monitoring system, and more particularly to an alarm recovery monitoring system that determines recovery of alarm information over two or more cycles and responds to a central monitoring device.

[Conventional technology]

For example, in the case of communication using optical fibers, various devices such as multiplex converters and optical repeaters are arranged, and signals are processed according to each device.

In order to maintain and provide stable and good communication services using these devices, failures such as disconnection of optical fiber cables and power failures are generally monitored for early detection and early recovery. This monitoring is performed centrally on various devices by a central monitoring device.

In other words, if a failure occurs in a monitored device such as a repeater,
The monitored device is configured to generate an alarm. A monitoring device placed for each monitored device monitors this alarm. The central monitoring device performs intensive monitoring by sequentially polling these monitoring devices for the presence or absence of alarms.

In such a monitoring device, if the central monitoring device responds to the presence or absence of an alarm at the time of polling, it is not possible to monitor an alarm that temporarily occurs during polling and then recovers. Therefore, conventional monitoring devices hold alarms output from monitored devices in an accumulated alarm buffer as accumulated alarm information until the next polling occurs.

Then, during polling, the monitoring device compares the previous alarm information that responded to the previous polling with the accumulated alarm information, and responds to the central monitoring device regarding the occurrence of an alarm based on the change.

FIG. 4 shows the timing at which such an alarm monitoring device transfers information that the alarm has been restored in response to polling from the central monitoring device.

FIG. 4a shows the generation and recovery of alarm information output from the monitored device. It is now assumed that alarm information is output from time t1 to time t2. In this case, accumulated alarm information is accumulated in the accumulated alarm buffer of the monitoring device from time t, as shown in the figure, until time t3, when the first polling after time t2 occurs.

FIG. 4C shows the timing of polling from the central monitoring device. Figure d shows the timing and content of the response from the monitoring device to the central monitoring device. As for the response from the monitoring device, a low level signal indicates "no alarm" and a high level signal indicates "alarm present".

Assuming that the monitoring device now responds to polling CL with no alarm, this response will be sent to the next polling C.
This information is retained as pre-alarm information in 2. In response to polling C2, the monitoring device determines that alarm information has occurred between polling CI and polling C2 and responds with an alarm since the previous alarm information indicates no alarm and the accumulated alarm information indicates alarm. d).

For polling c3 and c4, since both the previous alarm information and the accumulated alarm information indicate that there is an alarm, a response indicating that there is an alarm is sent to the central monitoring device.

In response to polling c5, the monitoring device determines that the alarm has been restored and responds that there is no alarm, since the response to polling C4 is that there is an alarm, but the accumulated alarm information has changed to a low level. .

[Problem to be solved by the invention]

In this way, it is possible to monitor alarms that have temporarily occurred and recovered within the polling cycle using the accumulated alarm information and previous alarm information. However, when the alarm information generated before and after polling is restored, a recovery response is sent to the central monitoring device with a delay of I polling. In other words, as shown in FIG. 4a, even though the alarm has actually recovered at time t2, there is no recovery response at the first poll c4 after time t, and the poll is delayed by one poll. A recovery response is sent in C5. Therefore, when there are many central monitoring devices, the status of the monitored devices cannot be accurately monitored due to the delay of one polling.
Recovery will also be delayed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an alarm recovery monitoring system that can respond to polling from a central monitoring device with the current state of alarm occurrence.

[Means to solve the problem]

The alarm recovery monitoring system of the present invention includes (i) a monitored device that detects occurrence of a failure and outputs alarm information;
ii) a central monitoring device that monitors the occurrence of a failure in the monitored device by regular polling; and (iii) a response means that responds to the polling from the central monitoring device with the presence or absence of alarm information of the monitored device. , <iv) a first storage means for storing the presence or absence of alarm information of the monitored device at the time of polling from the central monitoring device;
) a second storage means for storing the content of the response of the response means to the previous polling from the central monitoring device;
and third storage means for storing alarm information supplied since the last polling from the central monitoring device.

That is, the alarm recovery monitoring system of the present invention stores not only the content of the response of the response means to the previous polling and the alarm information supplied after the previous polling, but also the alarm information of the monitored device at the time of polling. This is what I did.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 shows the configuration of an alarm recovery monitoring system according to an embodiment of the present invention.

The alarm recovery monitoring system includes monitored devices 11 such as multiplexers and optical repeaters. The monitored device 11 detects various failures such as power outage and outputs alarm information. The monitoring device 12 includes a CPU (central processing unit) and a storage unit (not shown), and monitors the alarm information of the monitored bag ff1ll, stores necessary information, and determines whether alarm information occurs or is restored. Based on this determination, the monitoring device 12 responds to periodic polling from the central monitoring device 13 with an alarm or no alarm.

FIG. 2 shows the configuration of the storage section of such a monitoring device.

The storage unit 16 of the monitoring device 12 includes an accumulated alarm buffer 1
7 and a pre-alarm information buffer 18. The accumulated alarm buffer 17 is a buffer that holds alarm information outputted from the monitored device 11 until the next polling. The pre-alarm information buffer 18 is a buffer that holds information in response to polling as pre-alarm information until the next polling.

The storage unit 16 of the monitoring device 12 further includes a current alarm information buffer 19. The current alarm information buffer 19 is a buffer that holds alarm information output from the monitored device 11 while updating it as current alarm information one after another.

Next, the operation of the alarm recovery and monitoring system configured as described above will be explained.

FIG. 3 shows the timing at which the monitoring device transfers information that the alarm has been restored in response to polling from the central monitoring device. 3A to 3C are the same as those in FIG. 3, and are given the same reference numerals and description thereof will be omitted as appropriate.

FIG. 3d shows the timing and content of the response from the monitoring device to the central monitoring device.

As for the response from the monitoring device 12, a low level signal indicates "no alarm", and a high level signal indicates "alarm present".

The responses to polling cl and polling C2 are similar to the conventional responses explained in FIG. 4.

For polling C3, the monitoring device 12 compares the accumulated alarm information in the accumulated alarm buffer 17 and the previous alarm information in the previous alarm information buffer 18. Both have alarms, and before and after the previous polling C2, that is, 2
Since the alarm information is output from the monitored device 11 over a periodic period (FIG. 3a), the monitoring device 12 further refers to the current alarm information. Here, the alarm information is output before and after the previous polling C2. The purpose of determining whether or not the alarm information is present is to distinguish it from a case in which alarm information that occurs and recovers during each polling cycle occurs continuously.At the time of polling C3, alarm information is output from the monitored device 11. Therefore, current alarm information with an alarm is held in the current alarm information buffer 19.

Therefore, the monitoring device 12 responds to polling C3 with an alarm.

Similarly, the monitoring device 12 refers to the current alarm information buffer 19 because the image information held in the accumulated alarm buffer 17 and the previous alarm information buffer 18 indicates an alarm for polling C4. Since alarm information is not output from the monitored device 11 at the time of polling C4 (see figure a), the current alarm information without an alarm is held in the current alarm information buffer 19. Therefore, the monitoring is performed for polling C4. Device 12 determines that the monitored device has been restored and responds to the central monitoring device with no alarm.

For polling c5 and C6, since the accumulated alarm buffer 17 and the previous alarm information buffer 18 both hold the information that there is no alarm, the monitoring device 12 responds to the central monitoring device that there is no alarm.

According to the embodiment described above, it is possible to respond to the central monitoring device 977 minutes earlier than before to determine whether or not the alarm information output before and after the previous polling has been restored. . Therefore, it is possible to quickly restore the monitored device, and stable services can be provided.

〔Effect of the invention〕

As described above, according to the present invention, not only the contents of the response of the response means to the previous polling and the alarm information supplied after the previous polling, but also the alarm information of the monitored device at the time of polling are stored. Therefore, it is possible to monitor alarm information at the time of polling.

[Brief explanation of drawings]

1 to 3 are for explaining one embodiment of the present invention, of which FIG. 1 is a configuration diagram of an alarm recovery monitoring system, FIG. 2 is a configuration diagram of a storage section of a monitoring device, Figure 3 is a timing diagram showing the alarm generation status, polling, alarm generation, and recovery timing.
FIG. 4 is a timing diagram showing the conventional alarm generation state and the timing of transferring polling, alarm generation, and recovery. 11...Central monitoring device, 12...Monitoring device, 13...Monitored device, 14...
Storage section, 17... Accumulation alarm buffer, 18
...Previous alarm buffer, 19...Current alarm buffer.

Claims (1)

[Claims] A monitored device that detects the occurrence of a failure and outputs alarm information; a central monitoring device that monitors the occurrence of a failure in the monitored device by regular polling; a response unit that responds to polling with the presence or absence of alarm information of the monitored device; a first storage unit that stores the presence or absence of alarm information of the monitored device at the time of polling from the central monitoring device; a second storage means for storing the content of the response of the response means to the previous polling from the monitoring device; and a third storage means for storing alarm information supplied after the previous polling from the central monitoring device. An alarm recovery monitoring system comprising: