JPH09233147A - Communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent malfunction by allowing a manager equipment having an asynchronous communication function to apply exclusive control of a command to an agent equipment having a synchronous communication function so as to eliminate a limit of the use by the operator. SOLUTION: A manager equipment 1 is provided with an asynchronous function circuit 11, an agent equipment 3 is provided with a synchronous function circuit 31, and an exclusive module 2 is provided with an asynchronous command circuit 21, a synchronous command circuit 22 and a storage buffer circuit 23. The exclusive module 2 arbitrates exclusively the communication between the equipments 1 and 3, the synchronous command circuit 22 sends a command to the equipment 3, receives reply information from the equipment 3 and informs the result to a processing circuit 21. The storage buffer circuit 23 identifies the command, discriminate the priority and stores a priority code. Through the constitution above, even when plural commands are sent asynchronously, they are stored in a command storage section and sent exclusively by the synchronous command processing to provide normally each command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, for example, in network management in which a manager (management system) and an agent (management target) are related,
It can be applied to exclusive control of commands from an manager having an asynchronous communication function to an agent having a synchronous communication function.

[0002]

2. Description of the Related Art Generally, in a system having a relationship between a manager and an agent, the agent responds to a command from the manager. There is also an autonomous notification from the agent to the manager. Of these, the sequence from the command from the manager to the completion of the response from the agent is defined as one sequence.

A manager having only an asynchronous communication function permits the issuance of the next sequence before the completion of one sequence. 1 for agents that only have a synchronous communication function
Do not accept the next sequence until the sequence is completed.

That is, a plurality of commands cannot be processed simultaneously. Conventionally, when a manager and an agent having different communication methods are connected and network management is performed, an HMI (Human Machine Inte) having a manager has an asynchronous communication function.
(rface) command exclusion is performed according to the use restriction by the operator who operates the circuit, and only the synchronous communication function is provided for network management.

[0005]

However, in the prior art, since it depends on the usage limitation of the operator,
When the operator's erroneous operation occurs, the agent accepts and rejects the command from the manager, which causes the manager process to stop and the request information to be discarded.

Further, there is a problem that the operational feeling of the manager on the premise of asynchronous communication of the manager is impaired because of the synchronous communication function.

For these reasons, the manager device having an asynchronous communication function is required to provide a communication system capable of efficiently performing exclusive control of commands to an agent device having a synchronous communication function with a simple structure.

[0008]

SUMMARY OF THE INVENTION Therefore, the present invention provides a communication system comprising a first communication device having an asynchronous communication function and a second communication device having a synchronous communication function, as follows. Then, the above-mentioned problems are solved.

That is, the communication system of the present invention is the above first
Command exclusive control interface means for enabling exclusive control of commands from the second communication device to the second communication device.

Specifically, the command exclusive control interface means asynchronously processes the command transmitted from the first communication device and notifies the first communication device of response information from the synchronous command processing section. An asynchronous command processing unit, a command storage unit that temporarily stores a command from the first communication device, and a command stored in the command storage unit to the second communication device, And a synchronous command processing unit for receiving response information from the second communication device and giving it to the asynchronous command processing unit.

By adopting such a configuration, even if a plurality of commands are asynchronously transmitted from the first communication device, these commands are stored in the command storage unit by the asynchronous command processing unit, and the first communication device having the synchronous communication function is provided. By exclusively transmitting to the second communication device by the synchronous command processing unit at an appropriate time, the command can be normally given to the second communication device having the synchronous communication function.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. According to the embodiment of the present invention, in a network management system composed of devices of different communication methods such as an asynchronous communication function and a synchronous communication function, it is not a use restriction of an operator, but a prevention of an erroneous operation between a manager and an agent, an operation. The command exclusion system of the asynchronous / synchronous communication system is configured so as to interpose (insert) a command exclusion module for improving the property.

FIG. 1 is a system configuration diagram of the network management system of the present embodiment. In this FIG.
The network management system comprises a manager device 1, an exclusive module 2, and an agent 3. The manager device 1 includes an asynchronous communication function circuit 11
Is provided. The agent device 3 includes a synchronous communication function circuit 31. The exclusive module 2 characteristic of the present embodiment is the asynchronous command circuit 21.
, The synchronous command processing circuit 22, and the storage buffer circuit 2
And 3.

The exclusive module 2 is interposed between the manager device 1 and the agent 3, and the manager device 1 having an asynchronous communication function and the agent 3 having a synchronous communication function are provided.
It exclusively arbitrates the communication with.

The asynchronous command processing circuit 21 includes an asynchronous command reception circuit 211 and a storage buffer storage circuit 212.
And an in-accumulation-buffer priority control circuit 213 and a command notification circuit 214.

The asynchronous command receiving circuit 211 receives an asynchronous command issued from the manager device 1. The storage buffer circuit 23 stores the received asynchronous command. The storage buffer storage circuit 212 stores the asynchronous command in the storage buffer circuit 23. The in-accumulation-buffer priority control circuit 213 performs priority control of commands in the accumulation buffer circuit 23. The command notification circuit 214 notifies the synchronous command processing circuit 22 of a command.

The synchronous command processing circuit 22 is composed of a notification receiving circuit 221, a command transmitting circuit 222, an information receiving circuit 223, and a storage buffer updating circuit 224, and transmits a command to the agent device 3 and an agent device. It receives the response information from the communication terminal 3 and notifies the asynchronous command processing circuit 21 of the response information.

The notification receiving circuit 221 receives a command notification from the asynchronous command processing circuit 21.
The command transmission circuit 222 transmits a command from the agent device 3. Information receiving circuit 223
Receives information from the agent device 3. The accumulation buffer update circuit 224 updates the command of the accumulation buffer circuit 23.

The accumulation buffer circuit 23 includes a command correspondence priority table circuit 41 and accumulates asynchronous commands. FIG. 2 is an explanatory diagram showing the contents of commands and the like accumulated in the accumulation buffer circuit 23. In FIG.
Command code 23 that identifies commands and determines priority
1i including command information 232i, command priority code 233i, priority number 234i indicating priority after priority control, and buffer area free / closed state 23
5i and are accumulated. Further, as a data for managing the storage buffer circuit 23, a write right flag 236 to the storage buffer circuit 23 and the number of stored commands 23 stored
7 and a transmission permission flag 238 for managing transmission to the agent device 3 are also stored.

The command correspondence priority table circuit 41 is a table for the asynchronous command processing circuit 21 to perform priority control, and as shown in FIG.
The priority code 42 is stored for each command for performing the priority control of the commands stored in No. 3.

(Operation of Network Management System):
The operation of the network management system of FIG. 1 will be described.
Therefore, FIG. 4 is a flowchart of the asynchronous command processing. The command issued from the manager device 1 is
Asynchronous command processing circuit 2 of command exclusion module 2
1, received by the asynchronous command reception circuit 211 (step S500) and passed to the storage buffer storage circuit 212 which is a storage circuit for the storage buffer circuit 23. The accumulation buffer storage circuit 212 determines whether the write right flag 236 to the accumulation buffer 23 can be written (step S
501). If the result of this determination is that writing is prohibited, the process waits until writing becomes possible. If it is writable, write permission is set to the write right flag 236 (step S502).

Thereafter, a free area of the accumulation buffer circuit 23 is detected (step S503), and the command and the priority code 42 of the command retrieved from the command correspondence priority table circuit 41 are stored in the free area (priority code 233i) ( Step S504), and the block area is set to the empty block state 235i (step S50).
5), the number of storage buffer management data storage commands 237
Is added (step S506).

Next, the number of storage commands 237 stored in the storage buffer circuit 23 is stored as the priority number 234i (step S507). The in-accumulation-buffer priority control circuit 213 repeats the following processing until the exchange of the priority number 234i does not occur, thereby performing priority control (step S508).

The priorities (priority code 233i) of the commands with the fewest priority numbers 234i are compared with each other (step S
509), and if the newly stored command has a higher priority, the priority number 234i is exchanged.

The command notification circuit 214 to the synchronous command processing circuit 22 determines the transmission propriety flag 238 (step S510). If the transmission propriety flag 238 is transmittable, the transmission propriety flag 238 is set to non-transmission ( After step S511), the synchronous command processing circuit 22 issues a notification that the command has been received (step S512), and the write permission flag 236 is set to writable (step S513).

The synchronous command processing circuit 22 waits for notification that a command has been received, or for receiving information from the agent device 3.

FIG. 5 is a flowchart for explaining the flow of synchronous command processing when the synchronous command processing circuit 22 receives a command. In FIG. 5, first, when the notification receiving circuit 221 receives the notification that the command is received (step S600), it is determined whether the write right flag 236 of the accumulation buffer circuit 23 is writable (step S601). If it is determined that writing is prohibited in this determination, the process waits until writing is possible. If it is determined that the write is possible, the write permission flag 236 is set to write-protected (step S60).
2).

Next, in the command transmission circuit 222 for transmitting a command to the agent device 3, the command whose priority number 234i of the command in the accumulation buffer circuit 23 is 1 is transmitted to the agent device 3 (step S603). . After the transmission, the accumulation buffer circuit 23 is controlled by the accumulation buffer update circuit 224 of the accumulation buffer circuit 23.
A free space is set in the buffer area 235i (step S604). Further, the number 237 of stored commands in the storage buffer management table is subtracted (step S6
05), the writable flag 236 is set to be writable (step S606). The above is the flow of the synchronous command processing when the synchronous command processing circuit 22 receives a command.

FIG. 6 is a flow chart for explaining the flow of synchronous command processing when the synchronous command processing circuit 22 receives information from the agent device 3. In FIG. 6, first, when the information receiving circuit 223 receives information from the agent device 3 (step S610), it is determined whether the received information is a response to the command (step S611).

When it is determined in this determination that the command is not a response to the command, the manager device 1 is notified as it is (step S612). That is, the non-command response information is notified. If it is determined to be a response to the command, the command response information is returned to the manager device 1 (step S613), the transmission permission flag 238 is set to transmission permission (step S614), and then the storage buffer management data storage command is issued. When the number 237 is 1 or more, the notification receiving circuit 221 is notified that the command has been received (step S616). The above is the flow of the synchronous command processing when the synchronous command processing circuit 22 receives information from the agent device 3.

In this way, exclusive control of commands that can be processed by the agent device 3 having only a synchronous communication function for asynchronous commands can be realized, and priority control of commands with high priority during exclusive control can be realized. You can do it.

(Effects of the embodiment of the present invention): According to the above-described embodiment of the network management system of the present invention, the command exclusion module 2 is provided between the manager device 1 and the agent device 3. The effect is that there is no restriction on the operator's use and erroneous operation is prevented.

As for the operational feeling in the manager device 1, the priority can be set for each command, and the sequence control is performed while being accumulated in the accumulation buffer circuit 23.
A command having a high priority has a high probability of being able to quickly respond to the operator, and has the effect of improving the operational feeling for the operator.

Specifically, it is possible to realize a network management system for efficiently performing exclusive control of commands from the manager device 1 having an asynchronous communication function to the agent device 3 having a synchronous communication function with a simple configuration. is there.

The asynchronous command processing circuit 21 is also provided.
Determines the priority of the command from the manager device 1, gives priority to the processing of the command having the higher priority, and the storage buffer circuit 23 also manages the priority of the storage command to give priority to the processing. It is possible to efficiently process the command to be executed.

(Other Embodiments): (1) In the above embodiment, an example applied to a network management system has been described, but only a system for issuing commands by asynchronous communication and a synchronous communication function are provided. It is also applicable to a connection with a system that processes a command in, that is, a system that cannot process a plurality of commands at the same time.

(2) Also, the command exclusion module 2
Is shown as an independent position between the manager device 1 and the agent device 3, but may be applied as a part of the function of the manager device 1 or a part of the function of the agent device 3.

(3) Further, as an application other than the network management system as described above, the manager device 1 may be used as a management system of the exchange system and the agent device 3 may be used as an exchange device.

(4) Furthermore, the agent device is provided with a plurality of packet switches and ATM (asynchronous transfer mode: A
Synchronous Transfer Mod
e) It may be a communication device, a transmission device, or the like.

(5) Further, the above-mentioned storage buffer circuit 23
In the above, the commands are stored in the order of priority, but it is also preferable to manage the importance and store the commands in the order of importance.

[0041]

As described above, the present invention is a communication system including a first communication device having an asynchronous communication function and a second communication device having a synchronous communication function, and the first communication device to the above A command exclusive control interface means for enabling exclusive control of a command to the second communication device, wherein the command exclusive control interface means asynchronously executes the command transmitted from the first communication device. An asynchronous command processing unit that processes and notifies the response information from the synchronous command processing unit to the first communication device; a command storage unit that temporarily stores a command from the first communication device; The command stored in the storage unit is transmitted to the second communication device, the response information from the second communication device is received, and the asynchronous command is transmitted. It gives the command processing section is obtained by a synchronization command processing unit.

By adopting such a configuration, the communication system of the present invention is a communication for efficiently performing exclusive control of commands from the manager device having the asynchronous communication function to the agent device having the synchronous communication function with a simple structure. The system can be realized.

Therefore, in the communication system of the present invention, for example, in the network management in which the manager (management system) and the agent (management target) have a relationship, the manager device having an asynchronous communication function sends a command to the agent device having a synchronous communication function. The exclusive control of can be efficiently performed with a simple configuration.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a network management system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing contents of commands and the like to be stored in a storage buffer circuit according to the embodiment.

FIG. 3 is an explanatory diagram of a command correspondence priority table circuit in the accumulation buffer circuit according to the embodiment.

FIG. 4 is a flowchart of asynchronous command processing according to the embodiment.

FIG. 5 is a flowchart of synchronous command processing when a command is received according to the embodiment.

FIG. 6 is a flowchart of synchronous command processing when information is received from the agent according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Manager device, 2 ... Exclusive module, 3 ... Agent device, 11 ... Asynchronous communication function circuit, 21 ... Asynchronous command processing circuit, 22 ... Synchronous command processing circuit, 23
... storage buffer circuit, 31 ... synchronous communication function circuit, 41 ...
Command correspondence priority table circuit, 211 ... Asynchronous command reception circuit, 212 ... Accumulation buffer storage circuit, 213 ...
Storage buffer priority control circuit, 214 ... Command notification circuit, 221 ... Notification reception circuit, 222 ... Command transmission circuit, 223 ... Information reception circuit, 224 ... Storage buffer update circuit.

Front page continuation (72) Inventor Hiroshi Nagai 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd.

Claims (3)

[Claims] 1. A communication system comprising a first communication device having an asynchronous communication function and a second communication device having a synchronous communication function, wherein a command from the first communication device to the second communication device is provided. Command exclusive control interface means for enabling the exclusive control of the command exclusive control interface means, the command exclusive control interface means asynchronously processes the command transmitted from the first communication device, and a synchronous command processing part. An asynchronous command processing unit for notifying the first communication device of response information from the first communication device, a command storage unit for temporarily storing the command from the first communication device, and a command stored in the command storage unit. To the second communication device, receives response information from the second communication device, and sends the response information to the asynchronous command processing unit. Communication system, comprising a synchronization command processor that. 2. The asynchronous command processing unit comprises the first
The priority or importance of the command from the communication device, the command of this priority or high priority is processed first, and the command storage unit also manages the priority or importance of the stored command. The communication system according to claim 1, wherein: 3. A system capable of performing network management, comprising the first communication device as a manager device and the second communication device as an agent device, to form an agent device to be managed by the manager device. The system management is carried out.
Or the communication system according to 2.