JPH0468897A - Polling monitoring system - Google Patents

Abstract

PURPOSE:To monitor a network even in a subordinate monitoring device by transmitting a response signal including monitoring information to a main monitoring device and other subordinate monitoring devices, and constituting a data base even in each subordinate monitoring device. CONSTITUTION:When a subordinate monitoring device 12-1 receives a polling signal specified by its own device, the response signal including the monitoring information is formed and transmitted to a main monitoring device 11 and a subordinate monitoring device 12-2 from a transmission and reception processing device 16-1 through a transmitting and receiving circuit 17-1. And in the subordinate monitoring device 12-2, the response signal is added to a transmission and reception processing device 16-2 and transferred to subordinate monitoring devices 12-3 and 12-4. Next in the subordinate monitoring devices 12-1 to 12-4, by the control of central processing units 15-1 to 15-4, the response signal corresponding to the polling signal is discriminated, and data bases 14-1 to 14-4 composed of the monitoring information corresponding to the subordinate monitoring devices 14-1 to 14-4 are formed on memories 13-1 to 13-4.

Description

[Detailed Description of the Invention] [Summary] Regarding the polling monitoring method that collects monitoring information by polling, the purpose of this method is to enable network monitoring by both the main monitoring device and the slave monitoring device. In a polling monitoring system in which the slave monitoring device has a slave monitoring device of A response signal is sent to the monitoring device and other slave monitoring devices, and each slave monitoring device associates the polling signal and the response signal to the same database as the database consisting of monitoring information in the main monitoring device. The goal is to build

[Industrial application field]

The present invention relates to a polling monitoring method for collecting monitoring information by polling.

Various monitoring methods have been proposed to monitor each part of information transmission systems, such as optical transmission systems, as they become networked. It is requested that the

[Prior Art] As a conventional monitoring method, for example, as shown in FIG. 17, a main monitoring device 70 having a database 71 sends a polling signal to slave monitoring devices 72-1 to 72-n. A response signal containing monitoring information is sent from the slave monitoring device specified by this polling signal, and the main monitoring device 70
A polling monitoring method is known in which a database 71 is constructed based on this response signal.

The slave monitoring devices 72-1 to 72-n are provided corresponding to each part of the information transmission network, such as a switch, so that the main monitoring device 70 can monitor each part of the information transmission network. Also, from the main monitoring device 70 to the slave monitoring device 7
A control command is sent to 2-1 to 72-n using a polling signal, and the main monitoring device 70 sends a control command to the secondary monitoring devices 72-1 to 72-n.
It is also possible to control the operation of 72-n.

[Problem to be solved by the invention]

As mentioned above, in the conventional polling monitoring system, only the main monitoring device 70 is equipped with the database 71 to centrally monitor each part of the information transmission network, and only the main monitoring device 70 Each slave monitoring device 1f72-1
~72-n. Therefore, a maintenance person dispatched to a subordinate monitoring device when a failure occurs cannot obtain the necessary monitoring information and cannot control other subordinate monitoring devices from that subordinate monitoring device. Therefore, the main monitoring device 70 must be contacted and processes must be carried out in accordance with instructions from the main monitoring device 70, making prompt maintenance impossible.

In addition, if a failure occurs in the main monitoring device 70, the slave monitoring device 7
Since monitoring information cannot be collected from 2-1 to 72-n, the contents of the database 71 become inaccurate. Therefore, at the time of failure recovery, monitoring information is sequentially collected by polling from all the slave monitoring devices 72-1 to 72-n to rebuild the database 71, which has the disadvantage that the time required for failure recovery is longer. there were.

An object of the present invention is to enable network monitoring not only by a main monitoring device but also by a sub-monitoring device.

[Means to solve the problem]

The polling monitoring method of the present invention transmits a response signal containing monitoring information to a main monitoring device and other slave monitoring devices,
A database is also constructed in each slave monitoring device, which will be explained with reference to FIG.

Polling includes a main monitoring device 1 and a plurality of subordinate monitoring devices 2-1 to 2-n, and sends out response signals from the subordinate monitoring devices 2-1 to 2-n based on a polling signal from the main monitoring device 1. In the monitoring system, a slave monitoring device designated by a polling signal sends a response signal to the main monitoring device 1 and other slave monitoring devices. Each slave monitoring device establishes a database 4 that is the same as the database 3 in the main monitoring device 1 by associating polling signals with response signals.

In addition, the slave monitoring device designated by the polling signal from the main monitoring device I sends a response signal with command request information added, and the main monitoring device I adds a command according to this command request information to the polling signal. and send it.

In addition, the slave monitoring device designated by the polling signal from the main monitoring device sends out a response signal with a command for other slave monitoring devices added, and the slave monitoring device designated by this response signal responds to that command. control can be performed accordingly.

In addition, a polling line for transmitting polling signals, an upstream response line and a downstream response line for transmitting response signals provide a secondary monitoring system for the main monitoring device 1! 2-1 to 2-n are connected, the response signal from the slave monitoring device is sent to the uplink response line and the downlink response line, and the response signal from the other slave monitoring device is received and processed. Relay transmission can be performed in a direction different from the direction in which the signal was sent.

Also, the slave monitors 2-1 to 2-n are connected to the main monitor 1 through uplinks and downlinks, and the slave monitors 2-1
~2-n relays a polling signal from the main monitoring device 1 via the downlink, and when a slave monitoring device is designated by this polling signal, a response signal is transmitted via the downlink to another subordinate monitoring device on the lower side. 1, and also sends it to another subordinate monitoring device on the upper side or the main monitoring device 1 via the uplink, and receives and processes the response signal of the other subordinate monitoring device via the uplink or downlink, and in a direction different from the direction in which it was received. Can be relayed to.

Further, the slave monitoring bags [2-1 to 2-n each send a polling signal from the main monitoring device 1 and a response signal from other slave monitoring devices in all directions except the receiving direction, It is also equipped with a transmitting/receiving circuit that sends out response signals from the autonomous monitoring device in all directions.

Also, when the main monitoring device 1 recovers from a failure, the monitoring information from the database 4 of the two slave monitoring devices is collected and compared, and if the comparison matches, the database 3 is reconstructed using the collected monitoring information, and if the comparison does not match, the database 3 is reconstructed. Further, the monitoring information from the database 4 of one other slave monitoring device is collected, and the database 3 is reconstructed by a majority vote of the monitoring information from the database 4 of the three slave monitoring devices.

Furthermore, when the slave monitoring device recovers from a failure, it sends a response signal to the polling signal with a request command for monitoring information from the database 3 of the main monitoring device 1, and the main monitoring device 1 sends out the monitoring information from the database 3. However, the slave monitoring device reconstructs the database 4 using this monitoring information.

[Operation] The polling signal from the main monitoring device 1 is sent to the sub monitoring device 2-1.
~2-n, and the slave monitoring device designated by the polling signal sends a response signal to the main monitoring device 1 and other slave monitoring devices. Therefore, the slave monitoring devices 2-1 to 2-n
In this case, similarly to the main monitoring device 1, a database 4 having the same contents as the database 3 of the main monitoring device 1 can be constructed using a polling signal and a corresponding response signal. As a result, monitoring information necessary for performing maintenance work on each slave monitoring device can be immediately obtained, so that maintenance can be performed quickly.

Also, when a slave monitoring device needs to control another slave monitoring device, by adding command request information to the response signal and sending it back to the main monitoring device 1, the main monitoring device 1 can receive this command request information. By sending a polling signal to which a command according to the following is added, each slave monitoring device can send a command to other slave monitoring devices via the main monitoring device 1.

In addition, the slave monitoring device sends out a response signal with a command for other monitoring devices added to it, and each slave monitoring device receives and processes the response signal and relays it, so the response signal is The slave monitoring device designated by the command can perform control according to the command.

In this case, commands can be sent directly to other slave monitoring devices when specified by the polling signal.

Also, by providing a polling line, an upstream response line, and a downstream response line, polling signals and response signals can be identified by the lines, so that response signals can be received and processed using the upstream and downstream response lines. The data base 4 is constructed by receiving a polling signal via a polling line, and it is determined whether or not a self-slave monitoring device is designated, and the data is relayed to the subordinate monitoring device on the lower side.

In addition, in a configuration in which the main monitoring device 1 and the slave monitoring devices 2-1 to 2-n are connected in series through the uplink and downlink, a polling signal is sent to the downlink and to the subordinate monitoring device on the lower side. Since the response signal to be sent is transmitted, the subordinate monitoring device on the lower side identifies and processes the polling signal and the response signal. Further, only the response signal from the lower side slave monitoring device to the upper side slave monitoring device or main monitoring device 1 is transmitted on the uplink. In each slave monitoring device, a database 4 is constructed based on the received and processed response signals.

The transmitter/receiver circuit is composed of a gate circuit, etc., which transmits the polling signal and the response signal in all directions except the direction in which they are received, and connects the slave monitor 2 in series with the main monitor 1. -1 is connected by a three-branch transmitting/receiving circuit, and in the slave monitoring device 2-2 at the branch point, a four-branching transmitting/receiving circuit connects the slave monitoring device 1-1, the self-slave monitoring device 2-2, and the slave monitoring device 2-2. The monitoring devices 2 to 2 are connected to the slave monitoring device 2-n side.

Further, when the main monitoring device 1 recovers from a failure, two slave monitoring devices in the monitoring system are selected, and monitoring information from the respective databases 4 is collected by sending a polling signal. If the monitoring information from the databases 4 of these two slave monitoring devices are compared and they match, each database of the slave monitoring devices in the monitoring system is assumed to be correct, and the database 3 is reconstructed using the collected monitoring information. In that case, if the comparison does not match, the monitoring information from the database 4 of one other slave monitoring device is further collected, and the majority decision result of the monitoring information in the database 4 of the three slave monitoring devices is used as the correct monitoring information, and the main monitoring device Rebuild database 3 of 1. In that case, the data header 4 of the slave monitoring device that holds monitoring information different from the majority decision result is corrected.

In addition, when the slave monitoring device recovers from a failure, the main monitoring device 1 adds the monitoring information request command to the response signal to the polling signal from the main monitoring device 1, so that the main monitoring device 1 can access the database 3.
Since the monitoring information from the slave monitoring device is added to the polling signal and sent out, the slave monitoring device can reconstruct the database 4.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention, and shows an embodiment in which four slave monitoring devices 12-1 to 12-4 are connected to the main monitoring device 11. A large number of slave monitoring devices are connected in series or branched into multiple devices. In the figure, 13.13-1 to 13-4 are memories (MEM), 14.14-1 to 14-4 are databases (DB), and 15.15-1 to 15-4 are central processing units ( 16. 16-1 to 16-4 are transmission/reception processing units (SRU), and 17-1 to 17-4 are transmission/reception circuits.

A polling signal is formed under the control of the central processing unit 15 of the main monitoring device 11 and is transmitted from the transmission/reception processing device 16 . This polling signal is applied to the transmission/reception processing device 16-1 via the transmission/reception circuit 17-1 of the slave monitoring device 12-1, and is also transferred to the slave monitoring device 12-2. In the slave monitoring device 122, the signal is added to the transmission/reception processing device 16-2 via the transmission/reception circuit 17-2, and is also transferred to the slave monitoring device 12-3, 12-4.

In the slave monitoring device 12-1, the central processing unit 15-1 determines whether the polling signal is designated by the device itself. In the case of specifying the own device, a response signal containing monitoring information is formed under the control of the central processing unit 15-1, and sent from the transmission/reception processing device 16-1 to the main monitoring device 11 and the slave monitoring device via the transmission/reception circuit 17-1. 12-2. In the slave monitoring device 12-2, the signal is added to the transmission/reception processing device 16-2 in the same manner as the polling signal, and is also transferred to the slave monitoring devices 12-3, 12-4.

In the main monitoring device 11, under the control of the central processing unit 15, based on the monitoring information added to the response signal to the polling signal, a database 14 consisting of monitoring information corresponding to the slave monitoring devices f12-1 to f12-4 is created. is formed on the memory 13. Further, in the slave monitoring devices 12-1 to 12-4, the response signal corresponding to the polling signal is identified under the control of the central processing units 15-1 to 15-4, and the slave monitoring device 12-4 identifies the response signal corresponding to the polling signal.
Database 14 consisting of monitoring information corresponding to 1 to 12-4
-1 to 14-4 are formed on the memories 13-1 to 134.

Database 14-1 of slave monitoring devices 12-1 to 12-4
~14-4 have the same contents as the database 14 of the main monitoring device 11, but each of the slave monitoring devices 12-1~
12-4 holds the monitoring information of the own device in another area of the memory 13-1-13-4 until it is specified by the polling signal and sends out the monitoring information by the response signal;
By sending out the monitoring information using a response signal,
The central processing unit 15- updates its own database 14-1 to 14-4 with the monitoring information and clears the monitoring information held in other areas of the memory 13-1 to 13-4. 1-154.

FIG. 3 is a logic circuit diagram of an embodiment of a three-branch transmitter/receiver circuit, where G1-G3 are OR circuits, for example, the slave monitoring device 12
-1, when applied to the transmitting/receiving circuit 17-1, the input terminal I
NI and output terminal T1 are connected to the transmission/reception processing device 16 of the main monitoring device 11, input terminal IN2 and output terminal T2 are connected to the transmission/reception circuit of the slave monitoring device 122, and input terminal IN3 is connected to the transmission/reception processing device 16 of the main monitoring device 11.
and output terminal T3 are connected to the transmission/reception processing device 16-1. Therefore, from input terminal INI to output terminal T2
．． To T3, from input terminal IN2 to output terminal Tl, to T3,
From input terminal IN3 to output terminal TI.

Since they can be output to T2 respectively, it is possible to transfer the polling signal and the response signal to all.

Also, the transmission/reception circuit 17-3 of the slave monitoring device 12-3.12-4
．． 17-4 is the transmission/reception processing device 16-3.16 of the own device
Since it is only connected to -4, there is no need for branching, and therefore it can be omitted, but when considering expansion, it is preferable to provide it as shown.

FIG. 4 is a logic circuit diagram of an embodiment of a four-branch transmitting/receiving circuit, and G11. G12-G41. G42 is an OR circuit. The signal from the input terminal INI is sent to the output terminal T2 via the OR circuit G21, and to the output terminal T2 via the OR circuit C3.
3, they are output to the output terminal T4 via the OR circuit G4. Also, the signal from the input terminal IN2 is sent to the OR circuit G.
12. OR circuit 032 to output terminal T1 via G11
OR circuit G42G41 to output terminal T3 via G31
are respectively output to the output terminal T4. Further, the signal from the input terminal INS is sent to the output terminal T1 via the OR circuit G11, and to the output terminal T1 via the OR circuit G22°G21.
2, they are outputted to the output terminal T4 via the OR circuits G42 and G41, respectively. Also, the signal from input terminal IN4 is
OR circuit G12 Gll to the output terminal T1, OR circuit G22,021 to the output terminal T2, OR circuit G32. Each signal is output to the output terminal T3 via G31. That is, the signal can be output to all output terminals in a direction different from the input side of the signal.

Therefore, for example, the transmitting/receiving circuit 17 of the slave monitoring device I2-2
-2, the input terminal rN1 and the output terminal TI are connected to the transmission/reception circuit 17-1 of the slave monitoring bag 212-1, and the input terminal IN2 and the output terminal T2 are connected to the transmission/reception circuit 17-4 of the slave monitoring device 12-4. Then, the input terminal INS and the output terminal T3 are connected to the transmission/reception circuit 17-3 of the slave monitoring device 12-3, and the input terminal I
By connecting N4 and output terminal T4 to the transmission/reception processing device 16-2, it is possible to transmit the polling signal and the response signal in a direction different from the receiving direction, and also to transmit the response signals from the own device. It can be sent in any direction.

When configuring a multi-branch transmitter/receiver circuit, the number of gate circuits may be further increased, or the configuration shown in FIG. 4 may be used to connect the input terminal INI and output terminal of one transmitter/receiver circuit By connecting T1, the output terminal T3 of the other transmitting/receiving circuit, and the input terminal IN3, a six-branch transmitting/receiving circuit can be constructed.

Figure 5 is the main monitoring bag! 11, and indicates the format of the polling signal sent from the command calling device address ADR.
c, response designation device address ADRr, correlation number TAG, command type CMD, and detailed designation data A
DATA, and the correlation number TAG is for clarifying the correspondence between the polling signal and the response signal. The command type CMD indicates the type of command such as a general data request, detailed data request, control request, or setting value change request, and the detailed specification data ADATA indicates the content of the control request command or setting value change request command. be.

FIG. 6 shows the format of the response signal, which includes the command calling device address ADRc, the response response device address ADRr, the correlation number TAG, the kickback CMDK of the received command, the response format FRM, and the summary data SMR. It includes detailed data DATA and a calling request REQ to the command calling device.

The correlation number TAG is the same number as the correlation number TAG of the polling signal to make the correspondence, the kickback CMDK of the command is to make it correspond to the command of the polling signal, and the response format FRM is , displays the presence or absence of a request, and sends a call request REQ.
This is used when it is necessary to remotely control other slave monitoring devices.

FIG. 7 is a flowchart showing the operation of the main monitoring device II according to the embodiment of the present invention.
5, a polling signal having the format shown in FIG. 5 is formed, and the polling signal is sent from the transmission/reception processing device 16.

The processing device 1 transmits and receives a response signal in the format shown in FIG. 6 from the slave monitoring device specified by this polling signal.
6, the general data header and detailed data header of the database 14 are updated under the control of the central processing unit 15, and it is determined whether or not there are requests R and EQ in the response signal. At the time, it is determined whether detailed data is necessary or not. If not, the process ends and the process waits until the timing of sending the next polling signal.

Also, if there is a request REQ, a polling signal containing the request command is created and sent.

That is, a command according to a request from the slave monitoring device is added to a polling signal for the designated slave monitoring device and sent. Also, if detailed data is required, create and send a polling signal containing a detailed data request command.
.

FIG. 8 is a flowchart showing the operation of the slave monitoring device according to the embodiment of the present invention.
The central processing units 15-1 to 15-4 determine whether the received and processed signal is a polling signal or a response signal [phase], and if it is a polling signal, the own device uses the response designation address ADRr Determine whether or not the command is specified. If the own device is specified, determine if there is no command. If there is no request, create a response signal containing summary data SMR in response to the polling signal.■
, ■ sent from the transmission/reception processing devices 16-1 to 16-4.

By sending out the summary data SMR or detailed data DATA in response to the response signal from the own device, the database of the own device is updated as described above.

If the own device is not specified in the polling signal, the destination is recognized by the response specifying device address ADRr of the polling signal, and the device waits to receive a response signal [phase]. If the received signal is a response signal, it is identified by the correlation number TAG, etc. whether it is a response signal to the previous polling signal, and according to the summary data SMR and detailed data DATA of the response signal, the databases 14-1 to 14-
Update 4 ■.

Also, if a command is added to the polling signal,
It performs actions according to the command, for example,
For detailed data request command, detailed data DATA
■Create a response signal containing ■ and send that response signal■
.

In addition, if a failure occurs and it is necessary to control settings such as changing settings in another slave monitoring device from the own device, a request will be made in step ①, so a response including the request REQ will be sent. ■ Create a signal [phase] and send a response signal.

When the main monitoring device 11 receives this response signal, it sends out a polling signal containing the request command in step (3) in FIG. The slave monitoring device designated by the polling signal containing this request command will operate according to the command type CMD and detailed designation data ADATA.

Further, when there is a request from the own device to another slave monitoring device, it is possible to directly specify the other slave monitoring device and send a command without going through the main monitoring device 11 as described above. That is, since the response signal is also transmitted to all other slave monitoring devices, when specified by the polling signal, a response signal containing the address of the other slave monitoring device and a control command is sent, The slave monitoring device specified by the address can perform control according to the control command. According to this embodiment, a control command can be sent to the slave monitoring device before the slave monitoring device is designated by the next polling signal, so that quick control is possible.

Note that when transmitting and receiving control commands between slave monitors without going through the main monitor 11, each slave monitor 12
-1 to 12-4 can be freely issued when specified by a polling signal, so the main monitoring device 1
1 means that the final control state of each slave monitoring device 12-1 to 12-4 cannot be recognized. Therefore, it is necessary to provide status information or the like so that the final control state of the slave monitoring device 12-1-12-4 can be recognized.

FIG. 9 is an explanatory diagram of correlation numbers, and the polling signal is
L, the response signal is LP, and the correlation number TAG is 4 digits #1
This correlation number TAG is indicated by 000 to #9999 and is incremented every time the polling signal PL is sent. Note that the correlation numbers TAG #0000 to #OO09 are used for, for example, the -simultaneous command.

When the polling signal PL#1000 is sent from the main monitoring device, a response signal LP#1000 from the slave monitoring device designated by the polling signal is sent to the main monitoring device and other slave monitoring devices. Therefore, in the main monitoring device and the slave monitoring device, the polling signal and the response signal are associated with each other using the correlation number #1000, and the database is updated using the summary data SMR or detailed data DATA added to the response signal. be able to. The next polling signal PL becomes #1001 because the correlation number TAG is incremented, and the correlation number T of the response signal thereto is #1001.
AG will also be #1001. Similarly, polling signal PL
Since the response signal LP#9999 from the slave monitoring device specified by #9999 is sent to the main monitoring device and other slave monitoring devices, the polling signal and the response signal are correlated by correlation number #9999, The database can be updated.

FIG. 10 is an explanatory diagram of transmission/reception control according to an embodiment of the present invention, showing the main monitoring device 21, the slave monitoring devices 221.22-2.
...and the polling line 23 and the uplink response line 2
4a and the down response line 24b are connected in series, 25-1°25-2. ... is a central processing unit, and A1-A3 are synthesis circuits.

The polling signal from the main monitoring device 21 is sent via the polling line 23 to the slave monitoring devices 22-122-2.
... and is transferred to the central processing unit 251 25-2.
A response signal is created by determining whether or not the own device is specified in . For example, when the response signal is sent from the slave monitoring device 22-1, it is sent to the main monitoring device 21 via the uplink response line 24a via the synthesis circuit A1, and is sent to the downlink response line 24b via the synthesis circuit A2. It is sent to the subordinate monitoring device 22-2 on the lower side.

In this slave monitoring device 22-2, the database is updated by processing in the central processing unit 25-2 via the synthesis circuit A3, and the database is sent to the subordinate monitoring device on the lower side via the synthesis circuit A2 and the down response line 24b. be done.

When a response signal is sent from the slave monitoring device 22-2, it is sent to the slave monitoring device 22-1 on the upper side via the upstream response line 24a via the synthesis circuit A1, and is also transmitted to the slave monitoring device 22-1 on the upper side via the synthesis circuit A1.
It is sent to the subordinate monitoring device on the lower side via the downlink response line 24b. At this time, in the slave monitoring device 22-1 that received the response signal through the upstream response line 24a, the combining circuit A3
The data will be processed by the central processing unit 25-1 via the CPU 25-1 to update the database, and will be sent to the main monitoring device 21 via the uplink response line 24a via the synthesis circuit A1.
Like the main monitoring device, each slave monitoring device can update the database by associating polling signals from the polling line 23 with response signals from the upstream response line 24a and the downstream response line 24b.

FIG. 11 shows a block diagram of the main parts of the slave monitoring device in the above-mentioned embodiment, where 25 is the central processing unit (CPU), 26 is the receiving circuit, 27 is the transmitting circuit, and 2829 is the above-mentioned combining circuit At, A2. 30 is a reception synthesis circuit corresponding to the above-mentioned synthesis circuit A3, 31 is a transmission circuit connected to the upstream response line 24a for the subordinate monitoring device on the upper side (main monitoring device side), and 32 is the lower A transmitting circuit connected to the down response line 24b for the slave monitoring device on the side (opposite to the main monitoring device); 33 a receiving circuit connected to the down response line 24b for receiving from the slave monitoring device on the upper side; 34; is the uplink response line 24 for receiving from the subordinate monitoring device on the lower side.
This is a receiving circuit connected to a.

The central processing unit 25 can process the signal received by the receiving circuit 26 as a polling signal, and the signal received by the receiving circuits 33 and 34 as a response signal, and the polling signal is specified by its own device by the response specifying device address ADRr. If the own device is designated, it performs command reception processing, creates a own device response signal, and sends it to the transmission synthesis circuit 28.29 and from the transmission circuit 31.32 to the upstream response line 24a and the downstream response line. Send to 24b and
Update the database.

The central processing unit 25 also processes the received other device response signal and updates the database. The response signal received by the reception circuit 34 from the subordinate monitoring device on the lower side via the uplink response line 24a is sent from the transmission synthesis circuit 28 to the transmission circuit 31.
and is sent to the subordinate monitoring device or the main monitoring device on the upper side through the upstream response line 24a. Further, a response signal received by the receiving circuit 33 from the subordinate monitoring device on the upper side via the downlink response line 24b is applied from the transmission combining circuit 29 to the transmitting circuit 32, and is sent to the subordinate monitoring device on the lower side via the downlink response line 24b. be done.

In this embodiment, since the polling signal and the response signal are transmitted through separate lines, it is easy to identify them, and it is also possible to shorten the polling cycle.

FIG. 12 is an explanatory diagram of transmission/reception control in another embodiment of the present invention, showing the main monitoring device 41, the slave monitoring devices 421.41-2.
42-3. ...down line 43 and up line 4
4 is connected in series with 45-1.
45-2, 45-3... is a central processing unit, A4. A5
is a synthetic circuit.

When a polling signal is sent from the main monitoring device 41 through the downlink 43, in the slave monitoring device 42-1, the central processing unit 45-1 determines whether or not it is designated as its own device. Further, the polling signal is sent to the downlink 43 via the combining circuit A4.

When the central processing unit 45-1 determines that the polling signal is designated by the own device, a response signal is formed, and the response signal is sent to the uplink 44 via the synthesis circuit A5, and It is sent to the downlink 43 via the combining circuit A4. Since polling signals and response signals are transmitted to the subordinate monitoring device 42-2 on the lower side in a time-division manner via the downlink 43, the central processing unit 452 transmits the polling signal and the response signal to the subordinate monitoring device 42-2 on the upper side. 1 through the downlink 43, it is determined whether the signal is a polling signal or a response signal.

Further, the polling signal and the response signal are transmitted to the subordinate monitoring device 42-3 on the lower side via the downlink line 43 via the combining circuit A4.

Further, the slave monitoring device 42-2 is designated by the polling signal, and a response signal formed by the central processing unit 45-2 is transferred to the upper side slave monitoring device 42-1 via the upstream line 44 via the synthesis circuit A5. Then, the central processing unit 45-1
At the same time, a response signal is sent to the uplink 44 via the synthesis circuit A5 and transferred to the main monitoring device 41.

FIG. 13 is a block diagram of the main parts of the slave monitoring device in the above-mentioned transmission and reception control, in which 45 is a central processing unit (CPU);
6 is a receiving circuit, 47 is a transmitting circuit, and 4849 is the above-mentioned combining circuit A4. A combining circuit corresponding to A5, 50 a transmitting circuit,
51 is a receiving circuit.

When received by the receiving circuit 46 via the downlink 43, it is directly added to the transmitting circuit 47 via the combining circuit 48.
The signal is sent to the subordinate monitoring device on the lower side via the downlink 43, and the central processing unit 454 identifies whether it is a polling signal or a response signal, and if it is a polling signal, it is determined whether or not it is designated by the own device. If the device itself is designated, a response signal is created and transmission control is performed. That is, the created response signal is sent from the synthesis circuit 48 to the downlink 43 via the transmission circuit 47, and is also sent from the transmission circuit 50 to the uplink 44 via the synthesis circuit 49, and is added to the response signal. The database of the own device is updated according to the monitored information. Further, in the case of a response signal from another slave monitoring device, the central processing unit 45 performs a database update process.

Furthermore, when the reception circuit 51 receives the signal via the uplink 44, it is a response signal from the subordinate monitoring device on the lower side, so the central processing unit 45 performs database update processing, and the response signal is , from the combining circuit 49 to the transmitting circuit 5
The data is sent out via the uplink 44 via 0.

In this embodiment, the polling signal and the downstream response signal are transmitted in a time-division manner over the downlink 43, so two lines can be used to connect the main monitoring device and the slave monitoring device. I can do it.

FIG. 14 is an explanatory diagram of a monitoring system according to an embodiment of the present invention.
-10 are connected, respectively database 63.64-
1 to 6l-1o constitute a monitoring system.

Further, the slave monitoring device 62-1.62-2.62-4 is branched and connected, and the slave monitoring device 62-1.62=2 is connected in the same manner as the slave monitoring device 12-2 in FIG. Transmission/reception circuit 17
-2, and the slave monitoring device 62-4
is the adjacent slave monitoring device 62-3.62-5.62-9
．． 62-10, for example, by providing two transmitting/receiving circuits having the configuration shown in FIG. 4, it is possible to realize a five-branch configuration including the transmitting/receiving configuration of the own device. Then, the polling signal is sent to the subordinate monitoring device on the lower side as seen from the main monitoring device 61, and the response signal is sent in all other directions different from the receiving direction. As a result, the polling signal and the response signal are made to correspond to each other, and a database 6 of monitoring information corresponding to the slave monitoring device is created.
3.641 to 64-10 can be configured.

FIG. 15 is a failure recovery flowchart of the main monitoring device according to the embodiment of the present invention. When a failure occurs in the main monitoring device, the polling signal is not sent out, so the response signal in response to it is also not sent out, and each slave The database of the monitoring device retains the contents of the main monitoring device immediately before the failure occurred.

In other words, the monitoring information of each slave monitoring device is held until it is sent by a response signal, and the contents of the database are not updated until it is sent by a response signal. It becomes the content. However, if a failure occurs in the main monitoring device or the line immediately after sending out the response signal, the database of the slave monitoring device that could not receive the response signal and the main monitoring device, and the database of the slave monitoring device that sent out the response signal. There may be cases where the content differs from the database.

Upon failure recovery, the main monitoring device sends out a polling signal that designates any one slave monitoring device (1), and requests the contents of the database of that slave monitoring device using a command. Next, a polling signal designating another slave monitoring device is sent out (2), and the contents of the database of that slave monitoring device are requested by a command.

The main monitoring device compares the data collected by polling (3), and if the comparison matches, it rebuilds the database using the collected data (6). Also, if the comparison does not match,
Furthermore, it sends out a polling signal specifying another slave monitoring device (4), and requests the contents of the database using a command. As a result, data from the three slave monitoring devices has been collected, and the data are compared with each other and a majority decision process is performed. In this case, restart processing is performed on the database of the abnormal slave monitoring device that holds data different from the majority decision result (5). That is, after the database of the main monitoring device is rebuilt, the database is downloaded to the abnormal slave monitoring device.

If there is a match in the data comparison of the two databases (3), or if the data in the three databases match by majority vote processing, the database immediately before the failure occurs will be reconstructed (6), and the changes after the failure will be collected by polling. and updates the database (7). That is, each slave monitoring device holds the monitoring information until it sends out the monitoring information by a response signal, and since the database is not updated, the held monitoring information is collected by polling. In this case, the database is updated by collecting only the monitoring information that has changed after a failure occurs, so even if there are a large number of slave monitoring devices, the amount of data to be collected is small and the time is relatively short. You can update the database in no time.

Also, each axis monitoring device can update its respective database in accordance with response signals from other slave monitoring devices.

FIG. 16 is a failure recovery flowchart of the slave monitoring device according to the embodiment of the present invention. When the failure of the slave monitoring device is recovered, a response signal including a download request is sent out at the time specified by the polling signal (11). The main monitoring device recognizes the download request added to the response signal, and downloads the database of the main monitoring device to the slave monitoring device by polling. Thereby, the slave monitoring device that has recovered from the failure rebuilds the database 02).

Therefore, the failure recovery slave monitoring device can reconstruct a database with the same contents as the databases of other slave monitoring devices.

The present invention is not limited to the above-described embodiments, and can be modified in various ways.

〔Effect of the invention〕

As explained above, the present invention connects the main monitoring device 1 and a plurality of slave monitoring devices 2-1 to 2-n, and connects the database 3 of the main monitoring device 1 to each of the slave monitoring devices 2-1 to 2-n. - n database 4 to have the same contents, thereby controlling the distributed slave monitoring devices 2 -
1 to 2 n5 It becomes possible to immediately obtain the information necessary for maintenance work, and quick maintenance becomes possible.

It also sends a response signal to the polling signal to the main monitoring device 1 as well as to other slave monitoring devices.
By associating the polling signal with the response signal using the correlation number TAG, etc., and updating the database 3.4, the contents of each database 3, 4 can always be kept the same.

Further, the slave monitoring device designated by the polling signal sends out a response signal to which command request information for other slave monitoring devices is added, and the main monitoring device 1 sends out a polling signal containing the command according to the command request information. By doing so, it is possible to send commands such as changing the setting values of other slave monitoring devices via the main monitoring device 1, so it is possible to send commands such as changing the setting values of other slave monitoring devices during maintenance work on the slave monitoring device. This has the advantage that it is easy to specify the location of the failure, etc.

In addition, since the response signal to the polling signal is also transmitted to all the slave monitoring devices, the command can be sent directly to other slave monitoring devices by specifying the response signal number without going through the main monitoring device 1. You can also do that. In this case, the command can be sent without waiting until the next polling specifies another slave monitoring device, which facilitates quick maintenance work.

In addition, when the main monitoring device 1 and the slave monitoring devices 2-1 to 2n are connected by a polling line that transmits polling signals, and an uplink response line and a downlink response line that transmit response signals, the polling signal and the input port are connected. Since the response signal can be distinguished from the response signal, the transmission control of the response signal and the update control of the database 4 are facilitated.

In addition, when the main monitoring device 1 and the slave monitoring devices 2-1 to 2-n are connected via uplink and downlink, polling signals and response signals are transmitted to the downlink, and response signals are transmitted to the uplink. The polling signal and the response signal in each direction can be transmitted using two lines.

Furthermore, by providing a transmitting/receiving circuit that transmits in all directions different from the receiving direction, it is possible to transmit the polling signal and the response signal even to the branch-connected slave monitoring devices. Therefore, it is possible to collect monitoring information by constructing a tree-like network with many branch points.

In addition, when the failure of the main monitoring device 1 is recovered, when the contents of the databases of the two slave monitoring devices match, or by a majority vote of the contents of the databases of the three slave monitoring devices, the database 3 of the main monitoring device 1 is restarted. Therefore, even if there are a large number of slave monitoring devices 2 to 1 to 2-n, the database 3 of the main monitoring device 1 can be rebuilt in a relatively short time. In addition, when the slave monitoring device recovers from a failure, the database 4 will be rebuilt by downloading it from the main monitoring device 1. Therefore, the failure recovery process of the monitoring system can be completed in a short time, so information transmission is reduced. The reliability of network monitoring can be improved.

[Brief explanation of drawings]

FIG. 1 is a diagram explaining the principle of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a logic circuit diagram of a transmitting/receiving circuit according to an embodiment of the present invention, and FIG. 4 is a diagram explaining the principles of the present invention. 5 is a diagram explaining the format of the polling signal, FIG. 6 is a diagram explaining the format of the response signal, and FIG. 7 is a flowchart of the main monitoring device according to the embodiment of the present invention.
FIG. 8 is a flowchart of the slave monitoring device according to the embodiment of the present invention, FIG. 9 is an explanatory diagram of correlation numbers according to the embodiment of the present invention, and FIG.
Figure 11 is an explanatory diagram of transmission/reception control according to an embodiment of the present invention, Fig. 11 is a block diagram of main parts of a slave monitoring device according to an embodiment of the invention, and Fig. 12 is an explanatory diagram of transmission/reception control according to another embodiment of the invention. FIG. 13 is a block diagram of main parts of a sub-monitoring device according to another embodiment of the present invention, FIG. 14 is an explanatory diagram of a monitoring system according to an embodiment of the present invention, and FIG. FIG. 16 is a failure recovery flowchart for the main monitoring device, FIG. 16 is a failure recovery flowchart for the slave monitoring device according to the embodiment of the present invention, and FIG. 17 is an explanatory diagram of a conventional example. 2 is a main monitoring device, 2-1 to 2-k to 2-n are slave monitoring devices, and 3.4 is a database.

Claims (8)

[Claims] (1), main monitoring device (1) and multiple subordinate monitoring devices (2-1)
-2-n), and in which a response signal is sent from the slave monitoring devices (2-1 to 2-n) based on a polling signal from the main monitoring device (1), The slave monitoring device designated by the polling signal sends a response signal to the main monitoring device (1) and other slave monitoring devices, and each slave monitoring device (2-1 to 2-n) responds to the polling signal. A polling monitoring method characterized in that a database (4) identical to a database (3) consisting of monitoring information in the main monitoring device (1) is constructed by associating the data and response signals with each other. (2) The slave monitoring device designated by the polling signal from the main monitoring device (1) sends a response signal with command request information added, and the main monitoring device (1) sends out the command request information. 2. The polling monitoring system according to claim 1, wherein a command according to the following is added to a polling signal and transmitted. (3) The slave monitoring device specified by the polling signal from the main monitoring device (1) sends out a response signal with a command directed to another slave monitoring device, and 2. The polling monitoring system according to claim 1, wherein the device performs control according to a command added to the response signal. (4) The main monitoring device (1) is connected to the slave monitoring device (2-1 to 2-2) by a polling line that transmits the polling signal, and an uplink response line and a downlink response line that transmit the response signal. -n), transmits the response signal from the slave monitoring device to the uplink response line and the downlink response line, and receives and processes the response signal from the other slave monitoring device, as well as the direction in which it was received. 2. The polling monitoring system according to claim 1, wherein the polling monitoring system performs relay transmission in different directions. (5) Connect the slave monitoring devices (2-1 to 2-n) to the main monitoring device (1) via uplink and downlink, and connect the slave monitoring devices (2-1 to 2-n) to the main monitoring device (1). n) relays a polling signal from the main monitoring device (1) via the downlink, and when a slave monitoring device is designated by the polling signal, transmits a response signal to other lower-order devices via the downlink. At the same time as transmitting data to the slave monitoring device, the data is sent to another slave monitoring device on the upper side or the main monitoring device (1) via the uplink.
2. The polling monitoring system according to claim 1, wherein the polling monitoring system receives and processes response signals from other slave monitoring devices via the downlink and uplink, respectively, and relays them in a direction different from the direction in which they are received. (6) The slave monitoring devices (2-1 to 2-n) receive the polling signal from the main monitoring device (1) and the response signal from the other slave monitoring devices in a direction other than the receiving direction. Claim 1 further comprising a transmitting/receiving circuit that transmits all signals and transmits response signals from the autonomous monitoring device in all directions.
Polling monitoring method described. (7) When the main monitoring device (1) recovers from a failure, the monitoring information from the database (4) of the two slave monitoring devices is collected and compared, and if there is a match, the collected monitoring information is used to collect the monitoring information from the database (4). ), and if there is a mismatch, the monitoring information from the database (4) of another slave monitoring device is collected, and the database (4) of the three slave monitoring devices is reconstructed.
2. The polling monitoring method according to claim 1, wherein the database (3) is reconstructed by a majority vote of the monitoring information from ). (8) When the slave monitoring device recovers from a failure, a request command for monitoring information of the database (3) of the main monitoring device (1) is added to a response signal to the polling signal, and sent to the main monitoring device. (1) receives the monitoring information from the database (3), and the autonomous monitoring device database (
4) The polling monitoring system according to claim 1, wherein the polling monitoring system reconstructs the polling monitoring system.