JPH08307482A - Method and system for state monitor of communication equipment - Google Patents

Abstract

PURPOSE: To reduce the load of communication processing and transmission in a second communication equipment by transmitting the state information between first communication equipments by multicast transmission and collectively acquiring the state information of all of first and second communication equipments by the second communication equipment. CONSTITUTION: First communication equipments 1 transmit their own state information 22 to each other by multicast transmission. Equipments 1 communicate with second communication equipments 2 in 1:1, and state information 22 to 24 of all communication equipments are transmitted from equipments 1 to equipments 2 by cast transmission. The equipment 2 transmits its own state information 22 to equipments 1 and equipments 2 by broadcast transmission 5. Consequently, the equipment 1 doesn't communicate with the equipment 2 when transmitting its own information 22, and therefore, not only the load of communication processing in the equipment 2 is reduced but also the equipment 1 can transmit its own state information 22 to equipments 1 at a high speed. Meanwhile, the equipment 2 can acquire information 22 to 24 of all communication equipments at a time by access to the equipment 1 to reduce the load of the equipment 2 and the transmission load of a network 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device status monitoring system, and is particularly suitable for being applied to a communication device status monitoring system in a communication network in which communication devices having different transmission rates are mixed.

[0002]

2. Description of the Related Art In a conventional communication device status monitoring method, each communication device forming a communication network monitors the status of each communication device by communicating status information between the communication devices. Was there. In this case, each communication device has a state information file that stores state information indicating the states of all the communication devices that make up the communication network, and the broadcast frame in which the state information of its own communication device is written is used for each communication device. State information was communicated by broadcasting from the device to all other communication devices. Then, each communication device that receives the status information rewrites the status information of the corresponding communication device in the status information file, and when the time interval for receiving the status information is monitored by the timer and the time is up, the corresponding communication device is Was regarded as an abnormal state and the state information file was updated.

[0003]

However, in the conventional communication device state monitoring method, the broadcast transmission is frequently performed to all the communication devices constituting the communication network, and the transmission load of the communication network is large. There was a problem that the transmission efficiency was low.

Further, when communication devices having low communication processing capacity are mixed in the communication network, there is a possibility that a broadcast frame transmitted at a high frequency may be missed, and the state monitoring function cannot be sufficiently fulfilled. There was a problem.

Therefore, a first object of the present invention is to provide a state monitoring system for a communication device capable of reducing the transmission load of the communication network. A second object of the present invention is to provide a state monitoring method for a communication device that can reliably perform state monitoring without sacrificing transmission efficiency when a communication device having low communication processing capability coexists in a communication network. Is to provide.

[0006]

In order to solve the above-mentioned problems, according to the invention of claim 1, a multicast for transmitting status information indicating the status of its own communication device between the first communication devices. A transmitting unit, a broadcast transmitting unit 5 for transmitting the state information indicating the state of its own communication device in the second communication device to the first and second communication devices, and the first and the second communication devices in the first communication device. A unicast transmission unit that transmits status information indicating the status of the second communication device to the second communication device.

According to the second aspect of the present invention, the predetermined first communication device among the first communication devices sequentially performs unicast transmission to each of the second communication devices. .

According to the third aspect of the invention, the first status information file of the first communication device is updated based on the status information transmitted from the multicast transmission means.
Of the first communication device or the second communication device based on the status information transmitted from the updating means and the broadcast transmitting means.
Second update means for updating the status information file of the second communication device, and all status information files in the second communication device are collectively updated based on the status information transmitted from the unicast transmission means. And a third updating means.

According to the invention of claim 4, the broadcast transmitting means transmits an instruction for performing unicast transmission with the designated first communication device together with the status information indicating the information of the own communication device. ing.

Further, according to the invention of claim 5, the broadcast transmitting means transmits the status information indicating the status of the communication apparatus of its own as a confirmation response indicating that the update of the status information is completed. There is.

Further, according to the invention of claim 6, it is provided with a timing means for timing the time interval for receiving the status information, and when the lapse of a predetermined time is detected by the timing means, the status information file is updated. ing.

According to the invention of claim 7, the first communication device has a higher communication processing capacity than the second communication device.

[0013]

According to the first aspect of the present invention, the state information is transmitted between the first communication devices by multicast transmission, and the second communication device transmits the state information by broadcast transmission. The first communication device is the first
And the state information of each device can be obtained from each of the second communication devices.

Therefore, the second communication device can be prevented from performing the multicast communication with the first communication device, and the load of the communication processing of the second communication device can be reduced.

On the other hand, the second communication device collectively acquires all the state information of the first and second communication devices acquired by the first communication device by unicast transmission from the first communication device. I am trying to do it.

Therefore, the second communication device can obtain all the state information of the first and second communication devices at a time by accessing the first communication device, and the communication network of the second communication device can be obtained. It is possible to reduce the transmission load.

Further, according to the invention of claim 2, a predetermined first communication device among the first communication devices sequentially performs unicast transmission to each of the second communication devices. The second communication device is the first communication device acquired by the first communication device.
And, all the status information of the second communication device can be collectively obtained.

Therefore, the unicast transmitting means may be provided only in a predetermined first communication device among the first communication devices, and the configuration of the first communication device can be simplified. According to the invention of claim 3, all the state information files in the second communication device are collectively updated by the third updating means, thereby reducing the load of communication processing in the second communication device. can do.

Further, according to the invention of claim 4, the broadcast transmitting means transmits an instruction for performing unicast transmission with the designated first communication device together with the state information indicating the state of the own communication device. The second communication device can acquire all the state information of the first and second communication devices and transmit the state information indicating the state of its own communication device at a time. Also, the load on the communication network can be reduced.

Further, according to the invention of claim 5, the broadcast transmitting means transmits the status information indicating the status of the communication apparatus of the broadcast transmitting means as a confirmation response indicating that the update of the status information is completed. The state of the communication device can be monitored.

Therefore, the amount of transmission from the second communication device can be reduced, and the load on the communication network can be reduced. Further, according to the invention of claim 6, the first updating means and the second updating means include a time measuring means for monitoring a time interval for receiving the status information, and the elapse of a predetermined time is detected by the time measuring means. In this case, the status of each communication device can be monitored at high speed by updating the status information file.

According to the invention of claim 7, when the first communication device has a higher communication processing capability than the second communication device, a communication device having a low communication processing capability is mixed in the communication network. Also in this case, the state of each communication device can be reliably monitored without sacrificing the transmission efficiency.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a communication network according to a first embodiment of the present invention will be described below with reference to the drawings. Figure 1
1 is a block diagram showing a schematic configuration of a communication network according to a first embodiment of the present invention, and FIG. 4 is a diagram showing a status information file of a communication device according to an embodiment of the present invention.

In FIG. 1, the first communication device 1 is connected to the second communication device 1.
The communication device 2 has a higher communication processing capacity than the communication device 2, and the first communication device 1 and the second communication device 2 are connected to the communication network 3. Then, each of the first communication device 1 and the second communication device is provided with a status information file 21 as shown in FIG. 4, and each status information file 21 includes a self information indicating the status of its own communication device. State information 22 of the communication device of the first, the first indicating the state of the first communication device 1
The communication device status information 23 and the second communication device status information 24 indicating the status of the second communication device 2 are stored.

The first communication device 1 transmits the status information 22 of its own communication device shown in FIG. 4 between the first communication devices 1 and the multicast transmission means 4 and the status information of all the communication devices shown in FIG. A unicast transmission unit 6 for transmitting 22, 23, 24 from the first communication device 1 to the second communication device 2 by one-to-one communication. In addition, the second communication device 2 transmits the status information 22 of its own communication device of FIG. 4 from the second communication device 2 to the first communication device 1 and the second communication device 2 by the broadcast transmission means 5. Is equipped with.

Next, the operation of the communication network according to the first embodiment of the present invention will be described. In FIG. 1, between the first communication devices 1, the status information 2 of their own communication devices of FIG.
2 is transmitted by multicast transmission. Also, the first
Communication device 1 performs one-to-one communication with the second communication device 2, and the status states 22, 23, 2 of all communication devices in FIG.
4 by unicast transmission from the first communication device 1 to the second communication device 1.
To the communication device 2. Furthermore, the second communication device 2
Transmits the status information 22 of its own communication device of FIG. 4 by the first communication device 1 and the second communication device 2 by broadcast transmission.

Therefore, when the first communication device 1 transmits the status information 22 of its own communication device, since it does not communicate with the second communication device 2, the load of the communication processing of the second communication device 2 is increased. And the status information 22 of its own communication device can be transmitted at high speed between the first communication devices 1.

On the other hand, since the second communication apparatus 2 transmits the status information 22 of its own communication apparatus by broadcast transmission, it is monitored by all the other first communication apparatus 1 and second communication apparatus 2. It becomes possible to do.

The second communication device 2 can obtain the status information 22, 23, 24 of all the communication devices at a time by accessing the first communication device, and the communication of the second communication device 2 can be performed. The processing load can be reduced and
The transmission load of the communication network 3 can be reduced.

Next, the configuration of the communication network according to the second embodiment of the present invention will be described with reference to the drawings. Figure 2
FIG. 8 is a block diagram showing a schematic configuration of a communication network according to a second embodiment of the present invention.

In FIG. 2, the predetermined first communication device 1a among the first communication devices 1a and 1b connected to the communication network 3 is the status information 22 of its own communication device of FIG.
Multicast communication means 4a for transmitting data between the first communication devices 1a and 1b, and status information 22, 23 and 24 of all the communication devices in FIG. 4 from the first communication device 1a to the second.
Unicast transmitting means 6 for transmitting to the communication devices 2a, 2b. In addition, the first communication device 1b is shown in FIG.
The status information 22 of its own communication device is stored in the first communication device 1
multicast transmission means 4b for transmitting between a and 1b
It has. Further, the second communication devices 2a and 2b are
Broadcasting means 5a, 5b for transmitting the status information 22 of its own communication device of FIG. 4 from the second communication device 2a, 2b to the first communication device 1a, 1b and the second communication device 2a, 2b is provided. There is.

Next, the operation of the communication network according to the second embodiment of the present invention will be described. In FIG. 2, a predetermined first communication device 1a among the first communication devices 1a and 1b
Performs unicast transmission sequentially to each of the second communication devices 2a and 2b, so that the second communication device 2a,
2b can collectively acquire the status information 22, 23, 24 of all the communication devices of FIG. 4 acquired by the first communication device 1a.

Therefore, the unicast transmission means 6 may be provided only in a predetermined first communication device 1a among the first communication devices 1a and 1b, and the configuration of the first communication device 1b can be simplified. You can

Next, the configuration of the communication network according to the third embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 9 is a block diagram showing a schematic configuration of a communication network according to a third embodiment of the present invention.

In FIG. 3, the first communication device 1 connected to the communication network 3 transmits the status information 22 of its own communication device of FIG. And the status information 22, 23, 24 of all communication devices in FIG. 4 from the first communication device 1 to the second
Based on the state information 23 of the first communication device of FIG. 4 transmitted from the unicast transmission means 6 for transmitting to the communication device 2 of the first communication device and the multicast transmission means 4 of the other first communication device 1. Based on the state information 24 of the second communication device of FIG. 4 transmitted from the first updating means 7 for updating the state information file 21 of the second communication device 1 and the broadcast transmitting means 5 of the second communication device 2. The first communication device 1
The second updating means 8 for updating the status information file 21 of FIG.

Further, the second communication device 2 obtains the status information 22 of its own communication device of FIG. 4 from the second communication device 2 to the first information.
Broadcast communication means 5 for transmitting to the second communication device 1 and the second communication device 2 and the second communication device status information 24 of FIG. 4 transmitted from the broadcast transmission means 5 of the other second communication device 2. Based on the second communication device 2
Second updating means 9 for updating the status information file 21 of
And the status information 22 of all the communication devices of FIG. 4 transmitted from the unicast transmission means 6 of the first communication device 1,
A third updating means 10 for collectively updating the state information 23 of the first communication device and the state information 24 of the second communication device in the state information file 21 of the second communication device 2 based on 23 and 24. It has and.

The first updating means 1 and the second updating means 2 are provided with time measuring means 11 and 12 for monitoring the time interval for receiving the status information, and the time measuring means 11 and 12 are provided when a predetermined time has elapsed.
12, the status information file 2 of FIG.
Update 1.

Next, the operation of the communication network according to the third embodiment of the present invention will be described. In FIG. 3, between the first communication devices 1, the status information 2 of their own communication devices of FIG.
2 is transmitted by multicast transmission. Then, the status information 23 of the first communication device of FIG. 4 transmitted from the other first communication device 1 is received, and the status information file 21 is received.
The state information 23 of the first communication device is updated by the first updating means 7. The timekeeping means 11 monitors the time interval for receiving the status information 23 of the first communication device, and when the elapse of a predetermined time is detected by the timekeeping means 11, the first updating means 7 causes the status of FIG. The information file 21 is updated.

Further, the first communication device 1 carries out one-to-one communication with the second communication device 2 and the state information 22, 23, 24 of all the communication devices of FIG. Status information 24 of the second communication device in FIG. 4 transmitted from the second communication device 2 to the second communication device 2 and transmitted from the second communication device 2 by broadcast transmission.
Is received, the state information 24 of the second communication device in the state information file 21 is updated by the second updating means 8. Then, the timekeeping means 11 monitors the time interval for receiving the status information 24 of the second communication device, and when the elapse of a predetermined time is detected by the timekeeping means 11, the second updating means 8 causes the status of FIG. The information file 21 is updated.

On the other hand, the second communication device 2 transmits the status information 22 of its own communication device shown in FIG. 4 to the first communication device 1 and the second communication device 2 by broadcast transmission, and at the same time as other communication devices. 4 transmitted from the communication device 2 of FIG.
The second communication device status information 24 is received, and the second communication device status information 24 of the status information file 21 is updated by the second updating means 9. Then, the time measuring means 12 monitors the time interval for receiving the status information 24 of the second communication device, and when the elapse of a predetermined time is detected by the time measuring means 12, the second updating means 9 causes the state of FIG. Information file 2
Update 1. Also, the status information 22, 23, 24 of all the communication devices of FIG. 4 transmitted by the unicast transmission from the first communication device 1 is received, and the third updating means 1 is received.
The status information 23 of the first communication device and the status information 24 of the second communication device in the status information file 21 are collectively updated by 0.

Next, a method for monitoring the state of the communication device according to the first embodiment of the present invention will be described. FIG. 5 is a diagram for explaining the state monitoring system of the communication device according to the first embodiment of the present invention.

First, as shown in FIG. 5A, for example,
The first communication device A1 transmits the status information 22 of its own communication device in FIG. 4 in the first communication device A1 to the first communication devices A3, A4, A9 by multicast transmission.

On the other hand, the first communication devices A3, A4, A9
Receives the state information 23 of the first communication device A1 transmitted from the first communication device A1, updates the state information 23 of the first communication device A1 in the state information file 21 of FIG. 4, and When the reception interval is monitored by a timer and the time is up, the corresponding first communication device A3, A4,
Assuming that A9 is in an abnormal state, the state information file 21 of FIG. 4 is updated.

At this time, the second communication devices B2, B5 and the first
Since communication with the second communication device A1 is not performed, information is frequently exchanged between the first communication devices A1, A3, A4, and A9 even when the communication processing capabilities of the second communication devices B2 and B5 are low. And the second communication device B
It is possible to prevent the load of the communication processing of 2 and B5 from increasing.

Next, as shown in FIG. 5B, for example,
The second communication device B2 broadcasts the status information 22 of its own communication device of FIG. 4 in the second communication device B2 to the first communication devices A1, A3, A4, A9 and the second communication device B5. To transmit.

On the other hand, the first communication devices A1, A3, A4,
A9 and the second communication device B5 receive the status information 24 of the second communication device B2 transmitted from the second communication device B2, and the second communication device B2 of the second communication device B2 in the status information file 21 of FIG. When the status information 24 is updated and the reception interval is time-monitored by a timer and the time is up, the corresponding first communication device A1, A3, A4, A9 or the second communication device B5 is considered to be in an abnormal state 4 update the status information file 21.

Next, as shown in FIG. 5C, for example,
The second communication device B2 transmits a read request frame to the first communication device A1 and waits for a response from the first communication device A1.

Next, as shown in FIG. 5 (d), the first receiving request frame from the second communication device B2 is received.
Communication device A1 performs one-to-one communication with the second communication device B2, and all the communication devices A1, A3 stored in the state information file 21 of FIG. 4 in the first communication device A1.
The state information 22, 23, 24 of A4, B5, A9 is transmitted to the second communication device B2.

Next, the second communication device B2 has all the communication devices A1 and A transmitted from the first communication device A1.
The state information file 21 in the second communication device B2 based on the state information 22, 23, 24 of 3, A4, B5, A9.
The state information 23 of the first communication devices A1, A3, A4, and A9 and the state information 24 of the second communication device B5 are updated at once.

Similarly, the second communication device B5
The status information file 21 in the second communication device B5 is updated. Next, the state monitoring method of the communication device according to the first exemplary embodiment of the present invention will be described in more detail. FIG. 9 is a diagram for explaining the state monitoring method of the communication device according to the first embodiment of the present invention.

In FIG. 9, the first communication devices A1, A
3, A4, and A9 implement the multicast transmission function on the FDDI 13. In addition, the second communication device B2
A function for handling a unicast address and a broadcast address is implemented on the FDDI 13.

First, the first communication devices A1, A3, A4,
A9 is a notification frame in which the status information 22 of the own communication device of FIG. 4 in the first communication devices A1, A3, A4, A9 is addressed to the multicast address of the first communication devices A1, A3, A4, A9. Thus, it is transmitted to the first communication devices A1, A3, A4, and A9 cyclically and frequently.

On the other hand, the first communication devices A1, A3, A4,
A9 receives the state information 23 of the first communication device transmitted from the other first communication devices A1, A3, A4, A9, and the state of the first communication device in the state information file 21 of FIG. The information 23 is stored in the first communication devices A1, A3, A4,
While updating every A9, the time is monitored by the reception interval of the notification frame (FIG. 9).

Next, the second communication device B2 receives the status information 22 of its own communication device of FIG. 4 in the second communication device B2.
Is transmitted by broadcast to the first communication device A1,
It is transmitted to A3, A4, and A9.

On the other hand, the first communication devices A1, A3, A4,
A9 receives the status information 24 of the second communication device B2 transmitted from the second communication device B2, and the status information 2 of the second communication device B2 in the status information file 21 of FIG.
4 is updated and time is monitored by the reception interval of the notification frame (FIG. 9).

Next, the second communication device B2 transmits a read request frame to the first communication device A1 (FIG. 9).
). Next, the first communication device A1 that has received the read request frame from the second communication device B2 receives all the communication devices A1 stored in the state information file 21 of FIG. 4 in the first communication device A1. , A3, A4, A9, the second communication device B2 based on the read command inserted in the read request frame.
Send to. Next, the second communication device B2 uses the write response command inserted in the response frame from the first communication device A1 to send the status information 22 of all the communication devices A1, A3, A4, A9 in the response frame, 23,
24 based on 24, the first communication devices A1, A3, A4, A in the state information file 21 in the second communication device B2.
The status information 23 of 9 is updated at once (FIG. 9).

Next, a status monitoring system of the communication device according to the second embodiment of the present invention will be described. FIG. 6 is a diagram for explaining the state monitoring system of the communication device according to the second embodiment of the present invention.

First, as shown in FIG. 6A, for example,
The first communication device A1 transmits the status information 22 of its own communication device in FIG. 4 in the first communication device A1 to the first communication devices A3, A4, A9 by multicast transmission.

On the other hand, the first communication devices A3, A4, A9
Receives the state information 23 of the first communication device A1 transmitted from the first communication device A1, updates the state information 23 of the first communication device A1 in the state information file 21 of FIG. 4, and When the reception interval is monitored by a timer and the time is up, the corresponding first communication device A3, A4,
Assuming that A9 is in an abnormal state, the state information file 21 of FIG. 4 is updated.

Next, as shown in FIG. 6B, for example,
The second communication device B2 broadcasts the status information 22 of its own communication device of FIG. 4 in the second communication device B2 to the first communication devices A1, A3, A4, A9 and the second communication device B5. To transmit.

On the other hand, the first communication devices A1, A3, A4,
A9 and the second communication device B5 receive the state information 24 of the second communication device B2 transmitted from the second communication device B2, and the second communication device B2 of the state information file 21 of FIG. When the status information 24 is updated and the reception interval is time-monitored by a timer and the time is up, the corresponding first communication device A1, A3, A4, A9 or the second communication device B5 is considered to be in an abnormal state 4 update the status information file 21.

Next, as shown in FIG. 6C, for example,
The first communication device A1 performs one-to-one communication with the second communication device B2, and all the communication devices A1, A stored in the state information file 21 of FIG. 4 in the first communication device A1.
The state information 22, 23, 24 of 3, A4, B5, A9 is transmitted to the second communication device B2.

Next, as shown in FIG. 6 (d), the second communication device B2 is in a state of all the communication devices A1, A3, A4, B5, A9 transmitted from the first communication device A1. Based on the information 22, 23, 24, the second communication device B2
First communication device A in status information file 21 in
The state information 23 of 1, A3, A4, A9 and the state information 24 of the second communication device B5 are updated at once. And the second
The communication device B2 of 1 transmits a confirmation response indicating that the update of the state information file 21 is completed to the first communication device A1.

Further, the first communication device A1 is shown in FIG.
Similarly, as shown in FIG.
Performs one-to-one communication to all communication devices A1, B2, A
The state information 22, 23, 24 of 3, A4, A9 is transmitted. Then, as shown in FIG. 6D, the second communication device B5 has the status information file 21 in the second communication device B5.
Is updated and a confirmation response is transmitted to the first communication device A1.

Next, the state monitoring system of the communication device according to the second embodiment of the present invention will be described in more detail. Figure 10
FIG. 8 is a diagram illustrating a state monitoring system for a communication device according to a second example of the present invention.

In FIG. 10, the first communication devices A1, A
3, A4 and A9 are equipped with a multicast transmission function on the FDDI 13. In addition, the second communication device B2
A function for handling a unicast address and a broadcast address is implemented on the FDDI 13.

First, the first communication devices A1, A3, A4,
A9 is a notification frame in which the status information 22 of the own communication device of FIG. 4 in the first communication devices A1, A3, A4, A9 is addressed to the multicast address of the first communication devices A1, A3, A4, A9. Thus, it is transmitted to the first communication devices A1, A3, A4, and A9 cyclically and frequently.

On the other hand, the first communication devices A1, A3, A4,
A9 receives the state information 23 of the first communication device transmitted from the first communication device A1, A3, A4, A9,
The state information 23 of the first communication device in the state information file 21 of FIG. 4 is stored in the first communication devices A1, A3, A4, A9.
It is updated every time and the time is monitored by the reception interval of the notification frame (FIG. 10).

Next, the second communication device B2 receives the status information 22 of its own communication device in FIG. 4 in the second communication device B2.
Is transmitted by broadcast to the first communication device A1,
It is transmitted to A3, A4, and A9.

On the other hand, the first communication devices A1, A3, A4,
A9 receives the status information 24 of the second communication device B2 transmitted from the second communication device B2, and the status information 2 of the second communication device B2 in the status information file 21 of FIG.
4 is updated and time is monitored by the reception interval of the notification frame (FIG. 10).

Next, the predetermined first communication device A1
The state information 22, 23, 24 of all the communication devices A1, A3, A4, A9 stored in the state information file 21 of FIG. 4 in the communication device A1 of FIG. 4 is transferred to the second communication device B2 by the write request frame. Send. Next, the second communication device B2 uses the write request command inserted in the write request frame, based on the state information 22, 23, 24 of all the communication devices A1, A3, A4, A9 in the write request frame. , The first communication device A1 in the state information file 21 in the second communication device B2,
The state information 23 of A3, A4, and A9 is updated at once (FIG. 10).

Next, the second communication device B2 sends a confirmation response indicating that the update of the status information file 21 is completed.
To the communication device A1 (FIG. 10). Next, a status monitoring system of the communication device according to the third embodiment of the present invention will be described. FIG. 7 is a diagram for explaining the state monitoring method of the communication device according to the third embodiment of the present invention.

First, as shown in FIG. 7A, for example,
The first communication device A1 transmits the status information 22 of its own communication device in FIG. 4 in the first communication device A1 to the first communication devices A3, A4, A9 by multicast transmission.

On the other hand, the first communication devices A3, A4, A9
Receives the state information 23 of the first communication device A1 transmitted from the first communication device A1, updates the state information 23 of the first communication device A1 in the state information file 21 of FIG. 4, and When the reception interval is monitored by a timer and the time is up, the corresponding first communication device A3, A4,
Assuming that A9 is in an abnormal state, the state information file 21 of FIG. 4 is updated.

Next, as shown in FIG. 7B, for example,
The second communication device B2 broadcast-transmits the status information 22 of its own communication device of FIG. 4 in the second communication device B2 and the read request command designating the first communication device A1 by the first communication device A1. , A3, A4, A9
And to the second communication device B5.

On the other hand, the first communication devices A1, A3, A4,
A9 and the second communication device B5 receive the status information 24 of the second communication device B2 transmitted from the second communication device B2, and the second communication device B2 of the second communication device B2 in the status information file 21 of FIG. When the status information 24 is updated and the reception interval is time-monitored by a timer and the time is up, the corresponding first communication device A1, A3, A4, A9 or the second communication device B5 is considered to be in an abnormal state 4 update the status information file 21.

Next, as shown in FIG. 7C, the first communication device A1 designated by the read request command from the second communication device B2 is in a one-to-one correspondence with the second communication device B2.
Communication of all the communication devices A1 stored in the state information file 21 of FIG. 4 in the first communication device A1,
The state information 22, 23, 24 of A3, A4, B5, A9 is transmitted to the second communication device B2. Then, the second communication device B2 performs the second communication based on the state information 22, 23, 24 of all the communication devices A1, A3, A4, B5, A9 transmitted from the first communication device A1. The first communication device A1, A in the status information file 21 in the device B2
3, A4, A9 status information 23 and the second communication device B5
The status information 24 of is updated at once.

Thereafter, similarly for the second communication device B5, the broadcast transmission shown in FIG.
The state information file 21 in the second communication device B5 is updated by the unicast communication shown in (c).

Next, the state monitoring system of the communication device according to the third embodiment of the present invention will be described in more detail. Figure 11
FIG. 9 is a diagram illustrating a state monitoring system of a communication device according to a third example of the present invention.

In FIG. 11, the first communication devices A1, A
3, A4 and A9 are equipped with a multicast transmission function on the FDDI 13. In addition, the second communication device B2
A function for handling a unicast address and a broadcast address is implemented on the FDDI 13.

First, the first communication devices A1, A3, A4,
A9 is a notification frame in which the status information 22 of the own communication device of FIG. 4 in the first communication devices A1, A3, A4, A9 is addressed to the multicast address of the first communication devices A1, A3, A4, A9. Thus, it is transmitted to the first communication devices A1, A3, A4, and A9 cyclically and frequently.

On the other hand, the first communication devices A1, A3, A4,
A9 receives the state information 23 of the first communication device transmitted from the first communication device A1, A3, A4, A9,
The state information 23 of the first communication device in the state information file 21 of FIG. 4 is stored in the first communication devices A1, A3, A4, A9.
It is updated every time and the time is monitored by the reception interval of the notification frame (FIG. 11).

Next, the second communication device B2 receives the status information 22 of its own communication device of FIG. 4 in the second communication device B2.
And a read request frame including a read request command designating the first communication device A1 is transmitted to the first communication devices A1, A3, A4, and A9 by broadcast transmission (FIG. 11).

Next, the first communication device A1 designated by the read request command from the second communication device B2
All the communication devices A1, A3, A4, A stored in the state information file 21 of FIG. 4 in the first communication device A1.
A response frame including the status information 22, 23, 24 of 9 and a write equivalent command for designating the second communication device B2 is transmitted to the second communication device B2. Then, the second communication device B2, based on the state information 22, 23, 24 of all the communication devices A1, A3, A4, A9 in the response frame, the state information file 2 in the second communication device B2.
The status information 23 of the first communication devices A1, A3, A4, A9 in No. 1 is updated at once (FIG. 11).

The first communication devices A1, A3, A4,
A9 receives the status information 24 of the second communication device B2 transmitted from the second communication device B2, and the status information 2 of the second communication device B2 in the status information file 21 of FIG.
4 is updated and the reception cycle of the read request frame is monitored (FIG. 11). Next, a state monitoring system of the communication device according to the fourth exemplary embodiment of the present invention will be described. FIG. 8 is a diagram for explaining the state monitoring system of the communication device according to the fourth embodiment of the present invention.

First, as shown in FIG. 8A, for example,
The first communication device A1 transmits the status information 22 of its own communication device in FIG. 4 in the first communication device A1 to the first communication devices A3, A4, A9 by multicast transmission.

On the other hand, the first communication devices A3, A4, A9
Receives the status information of the first communication device A1 transmitted from the first communication device A1, updates the status information 23 of the first communication device A1 in the status information file 21 of FIG. When the interval is monitored by a timer and the time is up, the corresponding first communication device A3, A4, A9
State information file 2 in FIG.
Update 1.

Next, as shown in FIG. 8B, for example,
The first communication device A1 performs one-to-one communication with the second communication device B2, and all the communication devices A1, A stored in the state information file 21 of FIG. 4 in the first communication device A1.
The state information 22, 23, 24 of 3, A4, B5, A9 is transmitted to the second communication device B2. Then, the second communication device B2 receives the status information 2 of all the communication devices A1, A3, A4, B5, A9 transmitted from the first communication device A1.
The first communication device A1, A in the state information file 21 in the second communication device B2 based on 2, 23, 24.
3, A4, A9 status information 23 and the second communication device B5
The status information 24 of is updated at once.

Next, as shown in FIG. 8C, the second communication device B2 to which the write request is issued from the first communication device A1 communicates with itself in the second communication device B2 of FIG. The device status information 22 is transmitted as a confirmation response to the first communication devices A1, A3, A4, A9 and the second communication device B5 by broadcast transmission.

On the other hand, the first communication devices A1, A3, A4,
A9 and the second communication device B5 receive the status information 24 of the second communication device B2 transmitted from the second communication device B2, and the second communication device B2 of the second communication device B2 in the status information file 21 of FIG. When the status information 24 is updated and the reception interval is time-monitored by a timer and the time is up, the corresponding first communication device A1, A3, A4, A9 or the second communication device B5 is considered to be in an abnormal state 4 update the status information file 21.

Thereafter, the first communication device A1 similarly performs the unicast transmission shown in FIG. 8 (b) to the second communication device B5 to obtain the status information in the second communication device B5. Update the file 21. Then, the second communication device B5
As shown in FIG. 7 (c), the status information 22 of its own communication device is transmitted as a confirmation response by broadcast transmission.

Next, the state monitoring system of the communication device according to the fourth embodiment of the present invention will be described in more detail. 12
FIG. 9 is a diagram illustrating a state monitoring system of a communication device according to a fourth example of the present invention.

In FIG. 12, the first communication devices A1, A
3, A4 and A9 are equipped with a multicast transmission function on the FDDI 13. In addition, the second communication device B2
A function for handling a unicast address and a broadcast address is implemented on the FDDI 13.

First, the first communication devices A1, A3, A4,
A9 is a notification frame in which the status information 22 of its own communication device of FIG. 4 in the first communication devices A1, A3, A4, A9 is addressed to the multicast address of the first communication devices A1, A3, A4, A9. Thus, it is transmitted to the first communication devices A1, A3, A4, and A9 cyclically and frequently.

On the other hand, the first communication devices A1, A3, A4,
A9 receives the state information 23 of the first communication device transmitted from the first communication device A1, A3, A4, A9,
The state information 23 of the first communication device in the state information file 21 of FIG. 4 is stored in the first communication devices A1, A3, A4, A9.
It is updated every time and the time is monitored by the reception interval of the notification frame (FIG. 12).

Next, the predetermined first communication device A1
The state information 22, 23, 24 of all the communication devices A1, A3, A4, A9 stored in the state information file 21 of FIG. 4 in the communication device A1 of FIG. 4 is transferred to the second communication device B2 by the write request frame. Send. Then, the second communication device B2 uses the write request command inserted in the write request frame, based on the state information 22, 23, 24 of all the communication devices A1, A3, A4, A9 in the write request frame, Second communication device B2
First communication device A in status information file 21 in
The state information 23 of 1, A3, A4, A9 is updated at once (FIG. 12).

Next, the second communication device B2 receives the status information 22 of its own communication device of FIG. 4 in the second communication device B2.
And an acknowledgment frame including an acknowledgment command that specifies the first communication device A1 is transmitted to the first communication devices A1, A3, A4, and A9 by broadcast transmission. Then, the first communication device A1, A3, A4, A9
Second communication device B2 transmitted from the second communication device B2
The status information file 21 of FIG.
The state information 24 of the second communication device B2 in step 2 is updated and the reception cycle of the acknowledgment frame is monitored (FIG. 12).

[0098]

As described above, according to the invention of claim 1, the state information of the first communication devices is transmitted by multicast transmission between the first communication devices, and
By collectively obtaining all the state information of the first communication device and the second communication device by the second communication device,
It is possible to reduce the load of communication processing by the communication device and the transmission load of the communication network.

Further, according to the invention of claim 2, a predetermined first communication device among the first communication devices performs unicast transmission to each of the second communication devices. The configuration of the communication device can be simplified.

According to the third aspect of the invention, the load of the communication processing of the second communication device can be reduced by collectively updating all the state information files in the second communication device. it can.

According to the invention of claim 4, the broadcast transmitting means transmits an instruction for performing unicast transmission with the designated first communication device together with the state information indicating the state of its own communication device. The second communication device can acquire all the state information of the first communication device and the second communication device and transmit the state information indicating the state of its own communication device at one time. It is possible to reduce the load on the communication device and the communication network.

According to the invention of claim 5, the broadcast transmitting means transmits the confirmation response indicating that the update of the state information is completed by the state information indicating the state of the own communication device, The amount of transmission from the second communication device can be reduced, and the load on the communication network can be reduced.

According to the invention of claim 7, a communication device having a lower communication processing capacity than that of the first communication device is used as the second communication device, so that a communication device having a low communication processing capacity is mixed in the communication network. Even in such a case, the state of each communication device can be reliably monitored without sacrificing the transmission efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a communication network according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a communication network according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a communication network according to a third embodiment of the present invention.

FIG. 4 is a diagram showing a status information file of a communication device according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating a state monitoring method of a communication device according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a state monitoring system of a communication device according to a second exemplary embodiment of the present invention.

FIG. 7 is a diagram illustrating a state monitoring system of a communication device according to a third exemplary embodiment of the present invention.

FIG. 8 is a diagram illustrating a state monitoring system of a communication device according to a fourth example of the present invention.

FIG. 9 is a diagram illustrating a state monitoring method of a communication device according to the first embodiment of the present invention.

FIG. 10 is a diagram illustrating a state monitoring system of a communication device according to a second example of the present invention.

FIG. 11 is a diagram illustrating a state monitoring system of a communication device according to a third example of the present invention.

FIG. 12 is a diagram illustrating a state monitoring system of a communication device according to a fourth example of the present invention.

[Explanation of symbols]

 1, 1a, 1b First communication device 2, 2a, 2b Second communication device 3 Communication network 4, 4a, 4b Multicast transmission means 5, 5a, 5b Broadcast transmission means 6 Unicast transmission means 7 First updating means 8, 9 Second updating means 10 Third updating means 11, 12 Timing means 13 FDDI 21 Status information file 22 Status information of own communication device 23 Status information of first communication device 24 Status of second communication device information

Claims (8)

[Claims] 1. A communication network in which a first communication device and a second communication device are connected to each other, and a state information file indicating a state of the first and second communication devices connected to the communication network is provided. In a communication device state monitoring method provided in each of the communication devices, a multicast transmitting unit that transmits state information indicating a state of the communication device of the communication device between the first communication devices; A broadcast transmitting unit that transmits status information indicating the status of its own communication device in the communication device to the first and second communication devices; and the first and second communication devices in the first communication device. A state monitoring system for a communication device, comprising: unicast transmitting means for transmitting state information indicating a state to the second communication device. 2. A predetermined first of the first communication devices
2. The communication device status monitoring method according to claim 1, wherein the communication device performs unicast transmission to each of the second communication devices in sequence. 3. A first updating unit that updates a state information file of a first communication device based on the state information transmitted from the multicast transmitting unit, and state information transmitted from the broadcast transmitting unit. A second updating unit for updating the state information file of the first or second communication device based on the above, and all of the second communication device based on the state information transmitted from the unicast transmitting unit. 3. The communication device status monitoring method according to claim 1, further comprising a third updating unit that collectively updates the status information file. 4. The broadcast transmitting means sends, to the first and second communication devices, an instruction that specifies a first communication device that performs unicast transmission and status information that indicates the status of its own communication device. The communication device status monitoring method according to claim 1, wherein the communication device status monitoring method is performed once. 5. The communication according to claim 3, wherein the broadcast transmitting unit transmits the status information indicating the status of the communication apparatus of its own as a confirmation response indicating that the update of the status information is completed. Device status monitoring method. 6. The first updating means and the second updating means are provided with timing means for timing a time interval for receiving the status information, and when the passage of a predetermined time is detected by the timing means, the status The communication device status monitoring method according to claim 1, wherein the information file is updated. 7. The state monitoring method for a communication device according to claim 1, wherein the first communication device has a higher communication processing capacity than the second communication device. . 8. A communication network in which a first communication device and a second communication device are connected, and a state information file indicating a state of the first and second communication devices connected to the communication network is provided. A method for monitoring the state of a communication device provided in each of the communication devices, comprising: multicast transmission means for transmitting state information indicating the state of the communication device of the communication device between the first communication devices; Broadcast transmitting means for transmitting to the first and second communication devices state information indicating the state of the own communication device in the first communication device, and first and second communication devices in the first communication device And a unicast transmitting means for transmitting the state information indicating the state of 1. to the second communication device.