JPH0445697A - Polling system - Google Patents

Abstract

PURPOSE:To shorten required time to announce monitor items by providing a monitor station which simultaneously transmits a polling signal to stations to be monitored, and shifting little by little response time from each station to be monitored. CONSTITUTION:A monitor station 13 simultaneously transmits a signal 5 to announce only the existence of the state change of the monitor items, through a communication line to stations 14a-14c to be monitored. When this signal is received by the stations 14a-14c to be monitored, signals 6a-6c which indicate the existence of the state change of the monitor items are respectively transmitted to the monitor station 13 after the lapse of time prescribed preliminarily for each station. The monitor station 13 receives these signals one by one, and detects the station to be monitored which has the state change.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polling method, and particularly to a polling method in a monitoring system.

[Conventional technology]

Conventionally, in this type of polling method, a monitoring station cyclically sends a polling signal to each monitored station in sequence, and each monitored station that receives the polling signal immediately checks the current status of each monitored item. The status was sent to the monitoring station item by item.

[Problem to be solved by the invention]

In the conventional polling method described above, polling signals are sequentially sent to all monitored stations in a predetermined order, and in response, the monitored station immediately sends the status of each monitoring item to the monitoring station. Therefore, the time required to send polling signals to all monitored stations and have the status of monitored items sent to the monitoring stations in sequence increases as the number of monitored stations and monitored items increases. Even if a change in the status of a monitored item occurs at a monitored station, if the monitored station where the status change of the monitored item occurred has just been polled, it will be polled in the next cycle and check the details of the status change of the monitored item. When monitoring items are urgent and require a considerable amount of time to be sent to the monitoring station,
There was a problem in that a delay in reporting time could cause a serious failure in the system or device being monitored.

An object of the present invention is to provide polling technology that can quickly determine whether a monitored station is in a failure state and shorten the time it takes for the monitored station to notify the monitored station of a monitored item whose status has changed. The goal is to provide a method.

[Means to solve the problem]

In the polling method of the present invention, a monitoring station and at least one monitored station are connected via a communication line, and the monitoring station sends information indicating the status of monitoring items of the monitored station to the monitored station. In a polling method in which a polling signal is sent to a monitoring station to cause a notification, and a monitored station that has received the polling signal transmits information indicating the status of a monitored item to the monitoring station, the monitoring station: (A) A status change status notification polling signal sending means for sending a status change notification polling signal for causing the monitored station to report only the presence or absence of a status change of a monitoring item; a state change presence/absence notification signal receiving means for sequentially receiving state change presence/absence notification signals sent from the monitored stations after a specified period of time has elapsed, detects a monitored station with a state change, and outputs the detected state change presence/absence notification signals; (C) monitoring item status reporting polling signal sending means for sequentially sending out monitoring item status reporting polling signals for causing only the monitored stations that have undergone the state change to report the status of each monitoring item; (D) the monitored item status reporting polling signal sending means monitoring item status notification signal receiving means for receiving a monitoring item status notification signal from a monitoring station, the monitored station comprising: (E) status change presence/absence notification polling for receiving the status change presence/absence notification polling signal from the monitoring station; (F) After a predetermined time has elapsed since receiving the status change notification polling signal, the signal receiving means sends the status change notification signal indicating no status change of the monitoring item to the monitoring station; (G) A monitoring item status notification polling signal receiving unit that receives the monitoring item status notification polling signal; (H) A monitoring item status notification polling signal receiving unit that receives the monitoring item status notification polling signal; Monitoring item status notification signal sending means for sending out the monitoring item status notification signal for reporting the status of each monitoring item upon receiving the item status notification polling signal.

〔Example〕

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

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 1(a) is a block diagram of a monitoring device of a monitoring station, and FIG. 1(b) is a block diagram of a monitoring device of a monitoring station.
1 is a block diagram of a monitored device of a monitored station; FIG.

The monitoring device shown in FIG. 1(a) includes a status change notification polling signal sending means 1 for sending a status change notification polling signal 5 to the monitored station for reporting only the presence or absence of a status change of a monitored item; Status change notification signals 6a to 6c are sent from the monitored stations after a predetermined period of time has elapsed, each station being slightly shifted from the other, and the status change notification signals 6a to 6c are sequentially received, and the monitored stations whose status has changed are identified. A monitoring item status notification signal receiving means 2 that detects and outputs a status change notification signal, and a monitoring item status notification polling signal 7 that sequentially sends out a monitoring item status notification polling signal 7 to cause only the monitored station where a status change has occurred to report the status of each monitoring item. It is comprised of a polling signal sending means 3 and a monitoring item status reporting signal receiving means 4 for receiving monitoring item status reporting signals 8a to 8c from monitored stations.

The monitored device shown in FIG. 1(b) also includes a state change presence/absence notification polling signal receiving means 9 for receiving the state change presence/absence notification polling signal 5 from the monitoring station, and a state change presence/absence notification polling signal receiving means 9 which receives the status change presence/absence notification polling signal 5 and determines the state change presence/absence notification polling signal 5 in advance. After the specified time has elapsed, the status change status notification signal sending means 101 receives the monitoring item status notification polling signal 7 and sends the status change notification signal to the monitoring station to indicate the presence or absence of a status change of the monitoring item. When the monitoring item status notification polling signal receiving means 11 receives the monitoring item status notification polling signal 7, the monitoring item status notification polling signal receiving means 11 receives the monitoring item status notification polling signal 7 to report the status of each monitoring item. It is comprised of monitoring item status notification signal sending means 12 for sending out.

Next, the operation will be explained.

FIG. 2 is a configuration diagram of a monitoring system comprised of a monitoring station installed with the monitoring device shown in FIG. 1 and a monitored station installed with a monitored device.

The monitoring system shown in FIG.
A plurality of monitored stations 14 connected via communication lines to
It is composed of a to 14c.

The monitoring station 13 sends a status change status notification polling signal 5 to the monitored stations 14a to 14c from the status change status notification polling signal sending means 1 through the communication line to notify only the presence or absence of a status change of the monitored item. Send them all at once via

When each of the monitored stations 14a to 14c receives the status change notification polling signal 5 from the monitoring station 13 by the status change notification polling signal receiving means 9, the monitored stations 14a to 14c receive the status change notification polling signal 5 from the monitoring station 13. After the time has passed,
The state change presence/absence notification signal sending means 10 sends out to the monitoring station 13 state change presence/absence notification signals 6a to 6C, respectively, which indicate the presence or absence of a change in the status of the monitored item.

The monitoring station 13 uses the state change presence/absence notification signal receiving means 2 to sequentially detect that each of the monitored stations 14a to 14c sends the status change notification signals 6a to 6c after a predetermined time has elapsed. A monitored station whose status has changed due to reception is detected. At this time, each monitored station 1
The timing of sending signals from the monitoring stations 4a to 14c is such that each monitored station 14a to 14c sequentially sends out status change notification signals θa to 6c after a predetermined time. 13 is each monitored station 14a to 1
Settings are made so that the signals from 4c can be received sequentially within a predetermined time.

Now, for example, if a state change has occurred in the monitored station 14a and the monitored station 14b, then the monitoring item status is changed so that only the monitored station 14a whose state has changed will report the status of each monitoring item. A notification polling signal 7 is sent from the monitoring item status notification polling signal sending means 3. Then, the monitored station 14a which has received the monitoring item status notification polling signal 7 by the monitoring item status notification polling signal receiving means 11 sends the monitoring item status notification signal 8a for reporting the status of each monitoring item to the monitoring item status notification polling signal 7. The signal is sent from the signal sending means 12 to the monitoring station 13. The monitoring station 13 receives the sent monitoring item status notification signal 8a by the monitoring item status notification signal receiving means 4.

The monitoring station 13, which has collected the information on the status of the monitored items from the monitored station 14a, then sends out a monitoring item status report polling signal 7 to have only the monitored station 14b report the status of each monitored item, and then The monitored station 14b that has received the item status notification polling signal 7 sends a monitoring item status notification signal 8b to the monitoring station 13 for reporting the status of each monitoring item.

In this way, the monitoring station sends a polling signal to each monitored station at the same time, and with this polling signal, each monitored station receives information only about the presence or absence of a status change, and the response time is slightly different for each monitored station. and send them and receive them sequentially,
Next, by sequentially polling only the monitored stations where the status of the monitored item has changed and having them report the status of the monitored item,
It is immediately clear whether or not the monitored station is in a failure state.
It is possible to shorten the time required for a monitored station to report a monitored item whose status has changed to a monitoring station.

〔Effect of the invention〕

As explained above, in the present invention, a monitoring station simultaneously sends polling signals to monitored stations, sets the response time from the monitored stations to the polling signals to be slightly different for each monitored station, and As a response from the monitored station to the monitoring station, only the monitored station where the status of the monitored item has changed will report only the presence or absence of a status change to the monitoring station, and the monitoring station will first know whether there is a status change, Next, by sequentially polling only the monitored stations that have changed the status of a monitoring item and having them report the status of the monitoring item, it can be immediately determined whether the monitored station is in a failure state, and This has the effect of reducing the time required for the monitoring station to report a monitoring item whose status has changed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 1 is a configuration diagram of a monitoring system including a monitoring station installed with the monitoring device shown in the figure and a monitored station installed with a monitored device. 1... State change presence/absence notification polling signal sending means, 2... Status change presence/absence notification signal receiving means, 3
...Monitoring item status notification polling signal sending means, 4...Monitoring item status notification signal receiving means, 5.
...Polling signal for reporting status change, 6a to 6
c... Status change notification signal, 7...
Monitored item status update polling signal, 8a to 8C...
...Monitoring item status notification signal, θ...State change presence/absence notification polling signal receiving means, 10...State change presence/absence notification signal sending means, 11...Monitoring item status notification Polling signal receiving means, 12...Monitored item status notification signal sending means, 13...Monitoring station, 14a to 14c...Monitored station. Agent Patent Attorney Susumu Uchihara (α) (2%! Figure? 6c, Figure)

Claims (1)

[Scope of Claims] 1. A monitoring station and at least one monitored station are connected via a communication line, and the monitoring station transmits information indicating the status of monitoring items of the monitored station to the monitored station. In the polling method, the monitoring station transmits a polling signal to cause the monitoring station to report, and the monitored station that has received the polling signal transmits information indicating the status of the monitored item to the monitoring station. The monitored station transmits a status change notification polling signal all at once to report only the presence or absence of a status change of a monitored item, and after the monitored station receives the status change notification polling signal from the monitoring station, it transmits the status change notification polling signal in advance. After a predetermined period of time has elapsed for each item, a status change notification signal is sent to the monitoring station indicating whether or not the status of the monitored item has changed, and the monitoring station The monitored stations sequentially transmit the status change notification signal after a predetermined time has elapsed, detect the monitored station whose status has changed upon reception, and detect the status change. A monitoring item status reporting polling signal was sequentially sent to only the monitored stations that were present to report the status of each monitoring item, and each time the monitoring item status reporting polling signal was sent, the monitoring item status reporting polling signal was sent. A polling method characterized in that a monitoring item status notification signal for reporting the status of each monitoring item is received from the monitored station. 2. A monitoring station and at least one monitored station are connected via a communication line, and the monitoring station causes the monitored station to report information indicating the status of monitoring items of the monitored station to the monitoring station. In the polling method, the monitoring station sends out a polling signal for the purpose of monitoring, and the monitored station that has received the polling signal transmits information indicating the status of the monitored item to the monitoring station. A state change presence/absence notification polling signal sending means for sending out a status change presence/absence notification polling signal for reporting only the presence/absence of a status change of a monitoring item; (C) status change presence/absence notification signal receiving means for sequentially receiving status change notification signals sent from the monitored stations, detecting a monitored station with a status change, and outputting the status change notification signal; monitoring item status reporting polling signal sending means for sequentially sending out monitoring item status reporting polling signals for causing only monitored stations that have changed to report the status of each monitoring item; (D) monitoring item from the monitored station; monitoring item status notification signal receiving means for receiving a status notification signal, wherein the monitored station comprises: (E) status change presence/absence notification polling signal receiving means for receiving the status change presence/absence notification polling signal from the monitoring station; F) After a predetermined time has elapsed after receiving the state change presence/absence notification polling signal, transmitting to the monitoring station the state change presence/absence notification signal indicating the presence or absence of a change in the status of the monitored item to the monitoring station. (G) Monitoring item status reporting polling signal receiving means for receiving the monitoring item status reporting polling signal; (H) The monitoring item status reporting polling signal receiving unit receives the monitoring item status reporting polling signal. 1. A polling method comprising: monitoring item status notification signal sending means for sending out the monitoring item status notification signal for reporting the status of each monitoring item upon reception.