JP3492445B2 - How to guarantee execution completion time of remote control command - Google Patents

Description

Detailed Description of the Invention

[0001]

This invention relates to factory automation, process automation, power system control,
Or a method for guaranteeing the completion time of remote control commands in a distributed real-time system characterized by time-criticality (timeliness of executing remote control commands within the required time specified by an application) required in air traffic control systems, etc. Is.

[0002]

2. Description of the Related Art ISO (International Organization for Standardization) Standard 9506
The manufacturing message communication specification (hereinafter, referred to as MMS) defines a communication method for remotely operating the controller. FIG. 11 is a block diagram showing a network configuration of a conventional remote control system using such an MMS. In the figure, 1 is a network through which communication messages of this remote control system are transmitted, 2 is a controller connected to this network 1 as an operation target,
3n are nodes connected to the network 1 to remotely operate the controller 2.

FIG. 12 is a block diagram showing the internal structure of the controller 2 and the nodes 3A, 3B, ..., 3n. One node 3A, 3B ,. 3 is attached. In the figure,
Reference numeral 4 is a remote control application on the node 3 for executing remote control of the controller 2, and 5 is a communication control unit on the node 3 for sending and receiving communication messages to and from the network 1. . Reference numeral 6 denotes a communication control unit on the controller 2 for transmitting / receiving a communication message to / from the network 1, and 7 denotes this communication control unit 6
This is a communication condition negotiation unit that negotiates the maximum number of processing waits for a remote operation command based on the communication condition negotiation request received in. Reference numeral 8 is an instruction execution queue waiting for a remote operation instruction request received by the communication control section 6, and 9 is an instruction execution section for sequentially processing the remote operation instructions waiting in the instruction execution queue 8.

Next, the operation will be described. First, the negotiation operation of the communication condition regarding the remote operation command will be described.
The remote control application 4 of the node 3 requests the communication control section 5 to negotiate communication conditions in order to remotely control the controller 2. The communication control unit 5 transfers it as a communication message to the controller 2 via the network 1, and the communication control unit 6 of the controller 2 receiving this communication message sends a communication condition negotiation request to the communication condition negotiation unit 7. The communication condition negotiation unit 7 that has received the communication condition negotiation request negotiates the maximum number of waiting processing of the remote operation command, and responds to the communication control unit 6 with the negotiation value as the communication condition negotiation response. The communication control unit 6 of the controller 2 returns the communication condition negotiation response from the communication condition negotiation unit 7 to the node 3 via the network 1 as a communication message, and the communication control unit 5 of the node 3 receiving the communication message communicates. The condition negotiation response is sent to the remote control application 4.

Next, the procedure for executing the remote control command will be described. Upon receiving the communication condition negotiation response from the controller 2, the remote operation application 4 requests a remote operation command request for remotely operating the controller 2 to the communication control unit 5, and the communication control unit 5 uses the request as a communication message in the network 1 To the controller 2 via. The communication control unit 6 of the controller 2 which has received this communication message sends a remote operation command request to the command execution queue 8, and the remote operation command is added to the command execution queue 8 in the order of reception and waits. The instruction execution unit 9 executes the remote operation instructions waiting in the instruction execution queue 8 in the order in which they are added, and when the execution of one remote operation instruction is completed, the execution result of the remote operation instruction is remotely operated. It responds to the communication control unit 6 with a command response. The communication control unit 6 returns it as a communication message to the node 3 via the network 1, and the communication control unit 5 of the node 3 receiving this communication message sends a remote operation command response to the remote operation application 4
Send to. The remote control application 4 stores the number of processing waits for remote control commands, and requests the next remote control command so that the maximum number of processing waits for remote control commands is not exceeded.

FIG. 13 is a flow chart showing the flow of the communication condition negotiation processing in the communication condition negotiation unit 7 of the controller 2. When the communication condition negotiation unit 7 receives the communication condition negotiation request (step ST1), the sum of the maximum processing waiting numbers of the remote operation commands of the plurality of nodes 3 that are remotely operating the controller 2 and the communication condition negotiation request It is determined whether or not the sum of the maximum processing waiting number and the requested value is less than or equal to the maximum value of the instruction execution queue 8 (step ST
2). As a result, if the sum is less than or equal to the maximum value of the instruction execution queue 8, the communication condition negotiation unit 7 returns a communication condition negotiation response with the request value of the maximum number of waiting processing of the received remote operation command as a negotiation value (step ST3). ), Add the requested maximum number of processing waits to the sum of the maximum number of processing waits of remote control commands (step ST4). On the other hand, the sum is the instruction execution queue 8
If the maximum value of the command execution queue 8 is exceeded, the sum of the maximum number of processing waits for the remote control instructions does not exceed the maximum value of the instruction execution queue 8. Is used as a negotiation value and a communication condition negotiation response is returned (step ST5), and the sum of the maximum waiting numbers of remote operation commands is set to the maximum value of the command execution queue 8 (step S).
T6).

As described above, in the conventional remote control system, it is necessary to negotiate the communication condition of the maximum number of waiting processing of the remote control command for each node 3 which remotely controls the controller 2 and execute the remote control command. The number of instruction execution queues 8 is secured.

[0008]

Since the conventional remote control system is configured as described above, the number of instruction execution queues 8 required to execute a remote control instruction is the communication condition of the maximum waiting number. Secured by negotiating
Although the execution of the remote operation command is guaranteed, the maximum execution completion time of the remote operation command cannot be guaranteed, so that there is a problem that it is difficult to apply to the distributed real-time system.

The present invention has been made to solve the above problems. A first object of the present invention is to carry out a remote operation command requested by a remote operation application by a controller. (EN) A method of guaranteeing the execution completion time of a remote control instruction, which guarantees that the instruction is completed within the maximum execution completion time.

The second purpose is to stop the nodes and controllers connected on the network without stopping.
(EN) A method of guaranteeing the execution completion time of a remote operation command, which enables negotiation of communication conditions for guaranteeing the maximum execution completion time of a remote operation command.

[0011]

According to a first aspect of the present invention, there is provided a method for guaranteeing execution completion time of a remote operation command, wherein a maximum number of remote operation commands between a controller and a plurality of remote operation applications for remotely operating the controller are provided. The number of processing waits and the maximum execution completion time of remote control instructions are determined before the remote control application starts remote control, and the remote control application does not request the remote control instructions exceeding the maximum number of processing waits for remote control instructions. It was done like this. In addition, remote control application and controller
Requested value for the maximum number of processing of remote control commands between
When negotiating the required value of the maximum execution completion time of the instruction,
The remote control command of the remote control application has been completed.
Maximum number of commands to be processed and the maximum execution completion time of remote control commands
After guaranteeing the execution of the remote control command by the negotiation value of
Remote control of a remote control application that requested a negotiation
Maximum number of work commands waiting to be processed and maximum execution of remote control commands
It is designed to negotiate time.

According to a second aspect of the invention, there is provided a remote operation command execution completion time guarantee method, wherein a remote operation command response is returned from a controller to a remote operation application requesting a remote operation command, and the remote operation application executes this remote operation. Confirm the completion of execution of the requested remote control command by the command response, grasp the number of processing waits for remote control commands, and perform remote control until the current number of processing waits for remote control commands is less than the maximum number of waiting processing for remote control commands It is designed so as not to require an order.

According to a third aspect of the present invention, there is provided a remote operation command execution completion time guarantee method, which is premised on completion of execution of the remote operation command within a predetermined maximum execution completion time of the remote operation command. The remote control application keeps track of the number of remote control command processing waits and does not request remote control commands until the current number of remote control command processing waits is less than the maximum number of remote control command processing waits. is there.

In the remote operation command execution completion time guarantee method according to a fourth aspect of the present invention, the controller executes the remote operation commands in the order in which they are received from the remote operation application, and the maximum number of processing waits for the remote operation commands is reached. The maximum execution completion time of the remote operation command is determined for each remote operation application so as to guarantee the maximum execution completion time of the remote operation command.

According to a fifth aspect of the present invention, there is provided a method for guaranteeing execution completion time of a remote operation command, the remaining time until the execution completion time of the remote operation command waiting for execution and the execution completion time of a new remote operation command. Schedules remote operation commands so that shorter ones are executed first, and guarantees the maximum execution completion time of remote operation commands for each remote operation application.Maximum number of processing waits for remote operation commands and maximum execution completion of remote operation commands It decides the time.

According to a sixth aspect of the present invention, there is provided a remote operation command execution completion time guarantee method, wherein if there is a remote operation command being executed, the remote operation command is executed until the execution wait time of the remote operation command calculated for each remote operation application. Execution of the remote control command, the remote control command that has the shortest remaining time until the execution completion time of the remote control command is executed among the remote control commands for which the execution waiting time has elapsed, and if there is no remote control command being executed, the remote control command is executed. Schedule the remote operation command to be executed with the shortest remaining time until execution wait time, and determine the maximum number of processing waits and the maximum execution completion time that can guarantee the maximum execution completion time of the remote operation instruction for each remote operation application. However, the execution waiting time of the remote operation command that guarantees it is calculated for each remote operation application.

[0017]

According to a seventh aspect of the present invention, there is provided a remote operation command execution completion time guarantee method, wherein a controller is managed by a network management node, and communication conditions between the remote operation application and the controller are controlled by the remote operation application and the network management node. When negotiating between the two, the execution of the remote operation command is guaranteed according to the maximum number of remote operation command processing waits and the maximum execution completion time of the remote operation command between the remote operation application and the controller that have already completed the negotiation. In the above, the maximum number of processing waits for a remote control command between the new remote control application and the controller and the maximum execution completion time of the remote control command are negotiated.

[0019]

According to the first aspect of the present invention, there is provided a method for guaranteeing the execution completion time of a remote operation command, wherein the maximum number of waiting processing of the remote operation instruction between the remote operation application and the controller and the maximum execution completion time of the remote operation instruction are set remotely. Determine in advance based on the maximum execution completion time in the remote operation commands required by the operation application, and the remote operation application does not wait for the remote operation command to process more than the maximum number of remote operation commands to process. It is possible to guarantee the maximum execution completion time of the remote control command before starting the remote control by requesting a new remote control command after confirming the fact. Also requested from a remote control application
Maximum number of remote control commands to be processed and maximum number of remote control commands
If you negotiate the execution completion time, the negotiation has already completed.
Maximum of remote control commands for remote control application
Depending on the negotiation value between the number of processing waits and the maximum execution completion time of remote operation.
A new negotiation request after guaranteeing the execution of the remote control command
Of remote control commands for remote control applications
Negotiation between the number of processing waits and the maximum execution completion time of remote operation
By using the remote control application,
Other remote control without stopping the remote control
Application for remote control of the controller
A remote control application and control
Maximum number of remote control commands to be processed between rollers and remote control command
The maximum execution completion time of the command with the remote control application
Allows negotiation between controllers.

In the remote operation application according to the second aspect of the invention, when the remote operation command response is returned from the controller to the requested remote operation command, execution of the remote operation command requested by the remote operation command response is completed. Check the number of remote control command processing waits, confirm that the current number of remote control command processing waits is not more than the maximum number of remote control command processing waits, and then request a new remote control command. By performing the operation, the maximum execution completion time of the remote operation command in which the remote operation command response is returned is guaranteed before the remote operation is started.

The remote control application according to the third aspect of the present invention waits for processing of the remote control command on the assumption that the execution of the remote control command is completed by the predetermined maximum execution completion time of the remote control command. The remote control command response is returned by checking the number and confirming that the current number of remote control command processing waits is not more than the maximum number of remote control command processing waits and then requesting a new remote control command. Guarantee the maximum execution completion time of the remote control command not executed before starting the remote control.

The controller according to the fourth aspect of the present invention executes the remote operation commands in the order in which they are received from the remote operation application, and the maximum processing of the remote operation commands is performed so as to guarantee the maximum execution completion time of the remote operation commands. By determining the number of waits and the maximum execution completion time of the remote operation instruction for each remote operation application, the maximum execution completion time of the remote operation instruction is guaranteed before the remote operation is started.

In the controller according to the fifth aspect of the present invention, the shorter one is compared with the remaining time until the execution completion time of the remote operation command waiting for execution is compared with the execution completion time of the new remote operation command. Schedules the remote operation commands to be executed, and determines the maximum number of processing waits for the remote operation commands and the maximum execution time of the remote operation commands for each remote operation application to guarantee the maximum execution completion time of the remote operation commands. By doing so, the maximum execution completion time of the remote operation command is guaranteed before the remote operation is started.

When there is a remote operation command being executed, the controller according to the sixth aspect of the invention waits for the execution of the remote operation command until the execution wait time of the remote operation command calculated for each remote operation application, Among the remote operation commands for which the execution wait time of the remote operation command has elapsed, the remote operation command with the shortest remaining time until the execution completion time is executed,
If there is no remote operation command being executed, schedule the remote operation command with the shortest remaining time until the execution time of the remote operation command to be executed, and guarantee the maximum execution completion time of the remote operation command. In addition, the maximum waiting time for processing remote control instructions and the maximum execution completion time for remote control instructions are determined for each remote control application to guarantee the maximum execution completion time for the determined remote control instructions. Is calculated for each remote control application to guarantee the maximum execution completion time of the remote control command before starting the remote control.

[0025]

According to a seventh aspect of the present invention, there is provided a method for guaranteeing execution completion time of a remote operation command, in negotiating a communication condition between the remote operation application and the controller between the remote operation application and the network management node.
A new remote control application and controller are guaranteed after guaranteeing the execution of the remote control command according to the maximum number of waiting for remote control command processing and the maximum execution completion time of the remote control command between the remote control application and the controller that have already been negotiated. By negotiating the maximum number of processing waits for remote control commands and the maximum execution completion time of remote control commands,
It is possible to guarantee the maximum execution completion time of the remote control command before the remote control is started, and it is possible to add the remote control of the controller by another remote control application without stopping the remote control of the controller by the remote control application. The network management node that manages the controller negotiates with the remote operation application the maximum number of processing waits for remote operation commands between the remote operation application and the controller and the maximum execution completion time of the remote operation commands for deletion. To enable that.

[0027]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram showing an internal configuration of a controller and a node of a remote control system to which a method of guaranteeing an execution completion time of a remote control command according to a first embodiment of the present invention is applied. A plurality of nodes are represented by one. In the figure, 1 is a network, 2 is a controller, 3 is a node, 5 and 6 are communication control units, and 8 is an instruction execution queue, which are the same as or equivalent to those of the conventional one denoted by the same reference numeral in FIG. Therefore, detailed description is omitted.

Further, 10 requests the negotiation of the maximum number of remote operation command processing waits and the maximum execution completion time of the remote operation command, and the number of remote operation command processing waits of the controller 2 is the maximum number of remote operation command processing waits. It is a remote control application different from the conventional one indicated by reference numeral 4 in FIG. 12 in that it requests a remote control command request for remote control of the controller after confirming that the above is not the case. The reference numeral 11 indicates that the maximum processing time in the remote control command requested by the remote control application 10 is output to the communication condition negotiation unit 12 described below, and the command execution different from the conventional one denoted by reference numeral 9 in FIG. It is a department. 12 receives the maximum processing time from the command execution unit 11, and determines the maximum number of waiting remote processing commands requested by the remote operation application 10 and the maximum execution completion time of the remote operation commands as the maximum execution completion of the remote operation commands. This is a communication condition negotiating unit different from the conventional one designated by reference numeral 7 in FIG. 12 in that it negotiates so that time can be guaranteed.

Next, the operation will be described. Also in this case,
As in the conventional case, as shown in FIG.
And a plurality of nodes 3 that remotely control this controller 2.
A, 3B, ..., 3n are connected by a network 1, and their nodes 3A, 3B ,.
The remote control of the controller 2 is performed from a plurality of remote control applications 10 on 3n. Even when a plurality of controllers 2 are connected to the network 1, the individual controllers 2 operate similarly.

First, the operation of negotiating the communication conditions regarding the remote control command will be described. The remote control application 10 of the node 3 requests the communication control unit 5 to negotiate communication conditions in order to remotely control the controller 2. The communication control unit 5 transfers it as a communication message to the controller 2 via the network 1, and the communication control unit 6 of the controller 2 receiving this communication message sends a communication condition negotiation request to the communication condition negotiation unit 12. The communication condition negotiation unit 12 receives from the command execution unit 11 the maximum processing time in the remote operation commands requested by the remote operation application 10, and the maximum number of processing waits for the remote operation commands requested by the remote operation application 10 and the remote processing command. The maximum execution completion time of the operation command is negotiated so that the maximum execution completion time of the remote operation command is guaranteed, and the negotiation value is returned to the communication control unit 6 as a communication condition negotiation response. The communication control unit 6 returns the communication condition negotiation response from the communication condition negotiation unit 12 to the node 3 via the network 1 as a communication message,
The communication control unit 5 of the node 3 that receives this communication message sends a communication condition negotiation response to the remote control application 1
Send to 0. Here, regarding the negotiation of the communication conditions regarding the remote operation command, the communication conditions of all the remote operation applications have been negotiated at the time of system design, and the maximum waiting number of the remote operation commands and the remote operation commands determined at that time have been negotiated. The maximum execution completion time may be used for execution of a remote control command described later. Note that this also applies to other embodiments described below.

Next, the procedure of executing the remote control command will be described. Upon receiving the communication condition negotiation response from the controller 2, the remote operation application 10 of the node 3 confirms that the number of waiting processing of the remote operation command of the controller 2 is not more than the maximum processing waiting number of the remote operation command, and the remote operation command The number of processing waits is increased by one, and a remote operation command request for remotely operating the controller 2 is requested to the communication control unit 5. The communication control unit 5 transfers the remote operation command request as a communication message to the controller 2 via the network 1. The communication control unit 6 of the controller 2 which has received the command adds the remote operation command request to the command execution queue 8 in the order of reception, and the command execution unit 11 has the command execution queue 8
The remote control commands waiting for are executed in the order in which they can be added. When the execution of one remote operation command is completed, the remote operation command that does not need to return a response ends as it is. Also, the remote control command that needs to return a response is
The execution result of the remote operation command is returned to the communication control unit 6 by a remote operation command response. The communication control unit 6 returns it as a communication message to the node 3 via the network 1,
The communication control unit 5 of the node 3 receiving this communication message sends a remote control command response to the remote control application 10. When the remote control application 10 receives the remote control command response, the remote control application 10 reduces the number of processing of the remote control command by one.

For a remote operation command for which a response is not returned, the remote operation application 10 reduces the number of processing of the remote operation command by 1 when the maximum execution completion time of the remote operation command has elapsed. It manages the number of processing waits, and requests the next remote control command so that the maximum number of processing waits for remote control commands is not exceeded.

Here, FIG. 2 is a time chart showing the passage of time for the procedure of the remote control command. When the remote control application 10 transmits a remote control command request, the remote control application 10 sends the request to the controller 2 after the request delay time of the remote control command has elapsed.
It is received at, is added to the instruction execution queue 8 and enters a waiting state. The remote control command request waiting in the command execution queue 8 is executed by the command execution unit 11 when it comes to its own execution order. The remote operation command executed by the command execution unit 11 completes the remote operation command after the remote operation command processing time has elapsed, and the remote operation command that does not need to return a response ends as it is. On the other hand, a remote control command that needs to return a response returns a remote control command response to the remote control application 10. Remote control application 10
Receives this remote operation command response after the elapse of the remote operation command response delay time. The time until the controller 2 receives the remote operation command request and the execution of the remote operation command is completed is the remote operation command execution completion time.

Next, the maximum execution completion time guarantee algorithm for guaranteeing the execution completion time of the remote operation command in the above-mentioned remote operation command execution procedure will be described. FIG. 3 is a flowchart showing the flow of communication condition negotiation processing in the communication condition negotiation unit 12 of the controller 2. The communication condition negotiation unit 12 receives the communication condition negotiation request (step ST1).
1) and the guaranteed expression of the maximum execution completion time of the remote control command shown in the following expression (1) are checked to determine whether or not they are satisfied (step ST12).

Σ (N × Ta) ≦ Tb (1) Here, N is the maximum number of processing waits, Ta is the maximum processing time, and T is the maximum processing time.
b is the minimum value of all the maximum execution completion times including the negotiation request, and Σ () represents the sum of the remote control applications including the negotiation request in ().

As a result of the judgment, when the above-mentioned guarantee formula of the maximum execution completion time is satisfied, the communication condition negotiation section 12 returns the communication condition negotiation response with the request value from the remote operation application 10 as the negotiation value ( Step ST13). On the other hand, if the above-mentioned guarantee formula of the maximum execution completion time is not satisfied, the maximum execution completion time of the remote operation command and the maximum execution completion time of the remote operation command are calculated by Negotiation is performed so as to satisfy the calculation, and a negotiation value is calculated (step ST14), and the calculated negotiation value is returned as a communication condition negotiation response (step ST15).

Example 2. FIG. 4 is a block diagram showing an internal configuration of a controller and a node of a remote control system to which a method of guaranteeing execution completion time of a remote control instruction according to the second embodiment of the present invention is applied. The node is the same as that of the first embodiment. , A plurality of nodes are represented by one. In the figure, reference numeral 13 compares the remaining time until the execution completion time of the remote operation instruction waiting to be executed in the instruction execution queue 8 with the execution completion time of the new remote operation instruction, and the shorter one is executed first. Is a scheduling unit that schedules remote control commands. Reference numeral 1 in FIG. 1 denotes that the negotiation value 14 negotiated according to a request from the remote control application 10 is also transferred to the schedule unit 13.
The communication condition negotiation unit is different from that of the first embodiment shown by adding 2. The other parts are given the same reference numerals as the corresponding parts of the first embodiment shown in FIG. 1 and their explanations are omitted.

Next, the operation will be described. First, the negotiation operation of the communication condition regarding the remote operation command will be described.
The controller 2 and the node 3 for remotely controlling the controller 2 are connected by the network 1. The remote control application 10 of the node 3 requests the communication control unit 5 to negotiate communication conditions in order to remotely control the controller 2. The communication control unit 5 transfers it as a communication message to the controller 2 via the network 1, and the communication control unit 6 of the controller 2 receiving this communication message sends a communication condition negotiation request to the communication condition negotiation unit 14. The communication condition negotiation unit 14 receives from the command execution unit 11 the maximum processing time in the remote operation commands requested by the remote operation application 10, and determines the maximum number of processing waits for the remote operation commands requested by the remote operation application 10 and the remote processing command. The maximum execution completion time of the operation command is negotiated so that the maximum execution completion time of the remote operation command is guaranteed, and the negotiation value is returned to the communication control unit 6 as a communication condition negotiation response. At that time, the communication condition negotiation unit 14 also sends the maximum execution completion time of the negotiated remote operation command to the schedule unit 13.
The communication control unit 6 returns the communication condition negotiation response from the communication condition negotiation unit 14 to the node 3 via the network 1 as a communication message, and the communication control unit 5 of the node 3 receiving this communication message negotiates the communication condition. The response is sent to the remote control application 10.

Next, the procedure for executing the remote control command will be described. Upon receiving the communication condition negotiation response from the controller 2, the remote operation application 10 of the node 3 confirms that the number of waiting processing of the remote operation command of the controller 2 is not more than the maximum processing waiting number of the remote operation command, and the remote operation command The number of processing waits is increased by one, and a remote operation command request for remotely operating the controller 2 is requested to the communication control unit 5. The communication control unit 5 transfers the remote operation command request to the controller 2 via the network 1 as a communication message, and the communication control unit 6 of the controller 2 which receives the communication message requests the remote operation command request to the schedule unit 13. The schedule unit 13 compares the maximum execution completion time of the remote operation command received from the communication control unit 6 with the remaining time until the maximum execution completion time of the remote operation command waiting to be executed in the command execution queue 8. , Schedule the remote control command request so that the shorter one is executed first,
According to the order, the remote operation command request is added to the command execution queue 8.

The instruction execution unit 11 executes the remote control instructions waiting in the instruction execution queue 8 in the order in which they are added. When the execution of one remote operation command is completed, the remote operation command that does not need to return a response ends as it is. Further, the remote operation command that needs to return a response returns the execution result of the remote operation command to the communication control unit 6 as a remote operation command response. The communication control unit 6 returns it as a communication message to the node 3 via the network 1, and the communication control unit 5 of the node 3 receiving this communication message sends a remote operation command response to the remote operation application 10.

When the maximum execution completion time of the remote operation command has passed, the remote operation application 10 manages the number of remote operation command processing waits by reducing the number of remote operation command processing waits by one, The next remote control command is requested so that the maximum number of processing waits is not exceeded.

Next, the maximum execution completion time guarantee algorithm for guaranteeing the execution completion time of the remote operation command in the above-mentioned remote operation command execution procedure will be described. FIG. 5 is a flowchart showing the flow of communication condition negotiation processing in the communication condition negotiation unit 14 of the controller 2. The communication condition negotiation unit 14 receives the communication condition negotiation request (step ST2).
1) and the guaranteed expression of the maximum execution completion time of the remote operation command shown by the following expression (2) are examined to determine whether or not they are satisfied (step ST22).

Σ {(N × Ta) / (Tc−Td)} ≦ 1 (2) However, N is the maximum number of waiting processing, Ta is the maximum processing time, T
c is the maximum execution time, Td is the maximum value of all the maximum processing times including the negotiation request, and Σ {} represents the sum of the remote control applications including the negotiation request in {}.

As a result of the judgment, when the above-mentioned guarantee formula of the maximum execution completion time is satisfied, the communication condition negotiation section 14 returns the communication condition negotiation response with the request value from the remote control application 10 as the negotiation value ( Step ST23). On the other hand, if the above-mentioned guarantee formula of the maximum execution completion time is not satisfied, the maximum execution completion time of the remote operation command and the maximum execution completion time of the remote operation command are expressed by the guarantee formula of the maximum execution completion time by the formula (2). Negotiation is performed so as to satisfy the calculation, and a negotiation value is calculated (step ST24), and the calculated negotiation value is returned as a communication condition negotiation response (step ST25).

Example 3. FIG. 6 is a block diagram showing an internal configuration of a controller of a remote control system to which the execution completion time guarantee method for a remote control instruction according to the third embodiment of the present invention is applied. The node 3 is the same as in the first and second embodiments. , The illustration is omitted. In the figure, 15 is a remote control application 10 of the node 3 not shown.
The minimum processing time as well as the maximum processing time in the remote control command required by the communication condition negotiating unit 16 will be described below.
1 is an instruction execution unit different from that indicated by reference numeral 11 in FIGS. A remote control application 10 receives the maximum processing time and the minimum processing time of the remote operation command from the command execution unit 15, and the minimum request delay time and the minimum response delay time of the remote operation command from the communication control unit 6. The reference numeral 12 or 14 is added in FIGS. 1 and 4 in that the maximum number of processing waits for the remote operation command requested by the remote operation application 10 is negotiated with the maximum execution completion time of the remote operation command. Is a communication condition negotiation unit different from.

Reference numeral 17 denotes an execution waiting time queue in which a remote operation command request from the remote operation application 10 waits for the execution waiting time, and 18 monitors the execution waiting time queue 17 to execute a remote operation command whose execution waiting time has passed. The maximum execution completion time of the request is compared with the remaining time up to the maximum execution completion time of the remote operation instruction waiting to be executed in the instruction execution queue 8 so that the shorter one is executed first Is a waiting time monitoring unit for adding to the instruction execution queue 8. 19 receives the maximum execution completion time and execution waiting time of the remote operation command from the communication condition negotiation unit 16, and waits in the execution waiting time and execution waiting time queue 17 of the remote operation command request received by the communication control unit 6. The remote control command request is compared with the remaining execution wait time of the remote control command request, and the remote control command request is added to the execution waiting time queue 17 so that the shorter the waiting time is, the reference numeral 13 in FIG. This is a different schedule section from the one attached. The other parts are given the same reference numerals as the corresponding parts of the first embodiment shown in FIG. 1 and their explanations are omitted.

Next, the operation will be described. First, the negotiation operation of the communication condition regarding the remote operation command will be described.
Remote operation application 1 for node 3 (not shown)
0 requests the communication controller 5 to negotiate communication conditions in order to remotely operate the controller 2. The communication control unit 5 transfers it as a communication message to the controller 2 via the network 1, and the communication control unit 6 of the controller 2 receiving this communication message sends a communication condition negotiation request to the communication condition negotiation unit 16. The communication condition negotiation unit 16 is the command execution unit 1.
5, the maximum processing time and the minimum processing time of the remote operation command requested by the remote operation application 10 are received, and the minimum request delay time and the minimum response delay time of the remote operation command are received from the communication control unit 6. Then, the maximum number of waiting processing of the remote operation command requested by the remote operation application 10 and the maximum execution completion time of the remote operation command are
Negotiation is performed so that the maximum execution completion time of the remote control command can be guaranteed, and the negotiation value is returned to the communication control unit 6 as a communication condition negotiation response. At that time, the communication condition negotiation unit 16 calculates the execution waiting time of the remote operation command of each remote operation application 10 performing the remote operation, and calculates the execution wait time of the calculated remote operation command and the maximum execution completion of the negotiated remote operation command. The time is sent to the schedule section 19. The communication control unit 6 returns the communication condition negotiation response received from the communication condition negotiation unit 16 to the node 3 via the network 1 as a communication message, and the communication control unit 5 of the node 3 receiving this communication message determines the communication condition. The negotiation response is sent to the remote control application 10.

Next, the procedure for executing the remote control command will be described. Upon receiving the communication condition negotiation response from the controller 2, the remote operation application 10 of the node 3 confirms that the number of waiting processing of the remote operation command of the controller 2 is not more than the maximum processing waiting number of the remote operation command, and the remote operation command The number of processing waits is increased by one, and a remote operation command request for remotely operating the controller 2 is requested to the communication control unit 5. The communication control unit 5 transfers the remote operation command request as a communication message to the controller 2 via the network 1, and the communication control unit 6 of the controller 2 which receives the request sends a remote operation command request to the schedule unit 19. The schedule unit 19 compares the execution waiting time of the remote operation command request received from the communication control unit 6 with the remaining execution waiting time of the remote operation command request waiting in the execution waiting time queue 17, and the result is short. The remote operation command request is added to the execution waiting time queue 17 so that the execution waiting ends earlier.

The waiting time monitoring unit 18 monitors the execution waiting time queue 17 and determines the maximum execution completion time of the remote operation command request whose execution waiting time has passed and the execution waiting time in the instruction execution queue 8. The remote operation instruction request is scheduled so that the shorter one is executed first by comparing with the remaining time until the maximum execution completion time of the operation instruction, and the remote operation instruction is added to the instruction execution queue 8 according to the order. If there is a remote operation command request waiting in the command execution queue 8, the command execution unit 15 executes it in the order of addition, and if there is no remote operation command request waiting in the execution command queue 8, executes it. Remote operation command requests waiting in the waiting time queue 17 are sequentially executed.
When the execution of one remote operation command is completed, the remote operation command that does not need to return a response ends as it is. Further, the remote operation command that needs to return a response returns the execution result of the remote operation command to the communication control unit 6 as a remote operation command response. The communication control unit 6 returns it as a communication message to the node 3 via the network 1, and the communication control unit 5 of the node 3 receiving this communication message sends a remote operation command response to the remote operation application 10. When the remote control application 10 receives the remote control command response, the remote control application 10 reduces the number of processing of the remote control command by one.

For a remote operation command for which no response is returned, the remote operation application 10 reduces the number of remote operation command processing waits by one when the maximum execution completion time of the remote operation command has elapsed. It manages the number of processing waits, and requests the next remote control command so that the maximum number of processing waits for remote control commands is not exceeded.

Here, FIG. 7 is a time chart showing the passage of time for the procedure of the remote control command. When the remote control application 10 transmits a remote control command request, the remote control application 10 sends the request to the controller 2 after the request delay time of the remote control command has elapsed.
And is added to the execution waiting time queue 17. The remote operation instruction request added to the execution waiting time queue 17 is added to the instruction execution queue 8 by the waiting time monitoring unit 18 after the execution waiting time has elapsed, and the remote operation instruction request waiting in the instruction execution queue 8 is When it comes to its own execution order, it is executed by the instruction execution unit 15. The remote control command executed by the command execution unit 15 completes the remote control command after the remote control command processing time has elapsed,
The remote control command that does not need to return a response ends as it is. On the other hand, a remote control command that needs to return a response returns a remote control command response to the remote control application 10. The remote control application 10 receives this remote control command response after the remote control command response delay time has elapsed. The time until the controller 2 receives the remote operation command request and the execution of the remote operation command is completed is the remote operation command execution completion time.

Next, the maximum execution completion time guarantee algorithm for guaranteeing the execution completion time of the remote operation command will be described. FIG. 8 is a flowchart showing the flow of communication condition negotiation processing in the communication condition negotiation unit 16 of the controller 2. When the communication condition negotiation unit 16 receives the communication condition negotiation request (step ST31), the maximum number of waiting processing of remote operation commands of all the remote operation applications 10 including the remote operation application 10 requesting negotiation, the remote operation. From the maximum execution completion time of the instruction, the maximum processing time of the remote operation instruction, the minimum processing time of the remote operation instruction, the minimum required delay time of the remote operation instruction, and the minimum response delay time of the remote operation instruction, the above equation (2) is obtained. The guaranteed expression of the maximum execution completion time of the remote control command shown in the following expression (3) is examined to determine whether or not it is satisfied (step ST32).

Σ {(N × Ta) / (Te + Tf + Tg + Th-Ta-Td)} ≦ 1 (3) However, N is the maximum number of waiting processing, Ta is the maximum processing time, T
d is the maximum value of all the maximum processing times including the negotiation request, T
e is the maximum execution completion time, Tf is the minimum processing time, Tg is the minimum request delay time, and Th is the minimum response delay time.
Σ {} indicates the sum of the remote control applications including the negotiation request in {}.

As a result of the judgment, the above equations (2) and (3)
When the guaranteed expression of the maximum execution completion time by the above is satisfied, the communication condition negotiation unit 16 sets the request value of the maximum number of waiting processing of the remote operation command and the request value of the maximum execution completion time of the remote operation command as the negotiation values. A communication condition negotiation response is returned (step ST33). On the other hand, if the guaranteed expression for the maximum execution completion time is not satisfied, the maximum number of waiting processing of the remote operation command is set so as to satisfy the guaranteed expressions for the maximum execution completion time according to these expressions (2) and (3). The maximum execution completion time of the remote control command is negotiated to calculate a negotiation value (step ST34),
The calculated negotiation value is returned as a communication condition negotiation response (step ST35). It should be noted that the minimum processing time of the remote operation command, the minimum request delay time of the remote operation command, and the minimum response delay time of the remote operation command, which are included in the guarantee formula for guaranteeing the maximum execution completion time by the formula (3), cannot be obtained. In this case, "0" which is the physical minimum value is used.

Further, when the processing of step ST33 or step ST35 is completed, the maximum number of processing waits for remote operation commands, the maximum processing time of remote operation commands, the minimum processing time of remote operation commands of each remote operation application 10,
From the minimum request delay time of the remote operation command, the minimum response delay time of the remote operation command, and the maximum execution completion time of the remote operation command, the execution wait time of the remote operation command given by the following equations (4) and (5) is calculated. The execution waiting time of the remote operation command of each remote operation application 10 that satisfies the constraint expression is calculated (step ST36).

Σ {(N × Ta) / (Ti + Tf + Tg + Th)} ≦ 1 (4) However, N is the maximum number of waiting processing, Ta is the maximum processing time, T
f is the minimum processing time, Tg is the minimum request delay time, Th is the minimum response delay time, Ti is the execution waiting time, and Σ {} represents the total sum of the remote control applications in {}.

In all remote control applications, Ti ≦ Te-Ta-Td (5) where Ta is the maximum processing time, Td is the maximum of all the maximum processing times, Te is the maximum execution completion time, and Ti is the maximum execution completion time. Is the execution waiting time.

The schedule section 19 executes this step ST3.
The execution waiting time calculated in 6 is used to schedule the order of execution of the requested remote operation commands. The minimum processing time of the remote operation command, the minimum request delay time of the remote operation command, and the minimum response delay time of the remote operation command, which are included in the constraint expression of the execution wait time of the remote operation command according to the above formula (4), are obtained. If not, the physical minimum value "0" is used.

Example 4. FIG. 9 is a block diagram showing a network connection of a remote control system to which a method of guaranteeing execution completion time of a remote control command according to a fourth embodiment of the present invention is applied. In the figure, 1 is a network, 3A, 3
B, ..., 3n are nodes, which are equivalent to those denoted by the same reference numerals in FIG. Two
A, 2B, ..., 2m are nodes 3A, 3B ,.
A remote controller for 3n, which is equivalent to the one indicated by reference numeral 2 in FIG. 11, and in this case, a plurality (m) of controllers are connected to the network 1. Two
Reference numeral 0 is a network management node which is connected to the network 1 and manages the communication of the plurality of controllers 2A, 2B, ..., 2m.

FIG. 10 is a block diagram showing the internal configuration of the controller, node, and network management node of the remote control system to which the execution completion time guarantee method of the remote control instruction according to the fourth embodiment is applied. Are represented by one controller and one node, respectively. In the figure, 1 is a network, 2 is a controller, 3 is a node, 5 is a communication control unit of the node 3, 6 is a communication control unit of the controller 2, 8
Is an instruction execution queue, 10 is a remote control application, and these are denoted by the same reference numerals in FIG.
Since they are the same as or equivalent to those of the above, detailed description will be omitted.

Reference numeral 21 is a communication control unit on the network management node 20 for sending and receiving communication messages to and from the network 1. 22 is also on the network management node 20 and is used for the remote control application 10
A communication condition negotiation unit for negotiating the maximum number of waiting requests for remote operation commands and the maximum execution completion time of remote operation commands requested so that the maximum execution completion time of remote operation commands can be guaranteed. By having information on the processing time of the remote control instruction of the second instruction execution unit,
In order to obtain the maximum processing time in the remote control command requested by the remote control application 10, reference numeral 12 in FIG.
Is different from the communication condition negotiation unit on the controller 2 in the first embodiment. Reference numeral 23 denotes an instruction execution unit on the controller 2, which sequentially executes remote operation instructions waiting in the instruction execution queue 8.
Unlike the command execution unit of the first embodiment shown by attaching the reference numeral 11 to, the maximum processing time and the minimum processing time in the remote operation command requested by the remote operation application 10 are sent to the communication condition negotiation unit 22. There is no. As described above, in the fourth embodiment, the network management node 20 that manages the plurality of controllers 2 is connected to the network 1, and the communication condition negotiation unit disposed on the controller 2 is moved to this network management node 20. It is a thing.

Next, the operation will be described. First, the negotiation operation of the communication condition of the remote operation command by the network management node 20 will be described. The remote control application 10 of the node 3 requests the communication control unit 5 to negotiate communication conditions in order to remotely control the controller 2. The communication control unit 5 transfers it as a communication message to the network management node 20 via the network 1, and the communication control unit 21 of the network management node 20 receiving this communication message sends a communication condition negotiation request to the communication condition negotiation unit 22. send. The communication condition negotiation unit 22 obtains the maximum processing time of the remote operation command requested by the remote operation application 10 by having information on the processing time of the remote operation command of the command execution unit 23 of the controller 2, The maximum number of processing waits for the remote operation command requested by 10 and the maximum execution completion time of the remote operation command,
Negotiation is performed so that the maximum execution completion time of the remote control command can be guaranteed, and the negotiation value is returned to the communication control unit 21 as a communication condition negotiation response. The communication control unit 21 returns the communication condition negotiation response from the communication condition negotiation unit 22 to the node 3 via the network 1 as a communication message, and the communication control unit 5 of the node 3 receiving this communication message negotiates the communication condition. The response is sent to the remote control application 10.

Next, the procedure for executing the remote control command will be described. The remote control application 1 of the node 3 which receives the communication condition negotiation response from the network management node 20
0 confirms that the number of remote control command processing waits of the controller 2 is not more than the maximum number of remote control command processing waits,
The number of processing waits for the remote control command is increased by one, and a remote control command request for remotely controlling the controller 2 is requested to the communication control unit 5. The communication control unit 5 transfers the remote operation command request as a communication message to the controller 2 via the network 1. The communication control unit 6 of the controller 2 having received the request adds the remote operation command request to the command execution queue 8 in the order of reception, and the command execution unit 23 adds the remote operation command waiting in the command execution queue 8 to the command execution queue 8. Execute in the order given. When the execution of one remote operation command is completed, the remote operation command that does not need to return a response ends as it is. Further, the remote operation command that needs to return a response returns the execution result of the remote operation command to the communication control unit 6 as a remote operation command response. The communication control unit 6 returns it as a communication message to the node 3 via the network 1, and the communication control unit 5 of the node 3 receiving this communication message sends a remote operation command response to the remote operation application 10. When the remote control application 10 receives the remote control command response, the remote control application 10 reduces the number of processing of the remote control command by one.

For a remote operation command for which a response is not returned, the remote operation application 10 reduces the number of processing of the remote operation command by 1 when the maximum execution completion time of the remote operation command has elapsed. It manages the number of processing waits, and requests the next remote control command so that the maximum number of processing waits for remote control commands is not exceeded.

[0065]

As described above, according to the first aspect of the invention, the communication condition is negotiated based on the maximum processing time in the remote control command requested by the remote control application, and the communication is performed. The remote control application that received the condition negotiation response is configured to request a new remote control command after confirming that the number of remote control command processing waits is not greater than or equal to the maximum number of remote control command processing waits. , When the controller connected to the network is remotely operated from a plurality of remote operation applications on one or more nodes connected to the network, the maximum execution completion time of the remote operation command can be guaranteed before the remote operation is started. As a result, there is an effect that a method of guaranteeing the execution completion time of a remote operation command that facilitates the construction of a distributed real-time system can be obtained. In addition, the request value for the maximum number of waiting
Remotely negotiates the request value for the maximum execution completion time of remote control commands
When performing between the operation application and the controller,
The remote control application that has been negotiated with
Maximum number of remote operation commands waiting to be processed and remote operation maximum execution completion
Guaranteeing the execution of remote control commands based on the time negotiation value
Then, of the remote control application that made a new negotiation request.
Maximum number of remote command executions and maximum remote operation execution
Since it is configured to negotiate the end time,
Application to stop remote control of the controller
Controller by another remote control application without
It becomes possible to add or delete remote control of
Easy to change the configuration of real-time system
effective.

According to the second aspect of the invention, when the remote control command response is returned from the controller in response to the requested remote control command, the remote control application sends the remote control command requested from the remote control command response. After confirming the execution completion, grasp the number of remote operation command processing waits, and confirm that the current number of remote operation command processing waits is not more than the maximum number of remote operation command processing waits. Since it is configured to make a request, it is possible to limit the maximum waiting number of remote operation commands for which remote operation command responses are returned, and the execution of remote operation commands is completed within the maximum execution completion time of remote operation commands. There is an effect that can be made.

According to the third aspect of the invention, assuming that the execution of the remote control command is completed by the predetermined maximum execution completion time of the remote control command, the remote control application executes the remote control command. It is configured to request a new remote operation command after confirming that the number of processing waits for the current remote operation command is not greater than the maximum number of remote operation command processing waits. This makes it possible to limit the maximum number of processing waits for a remote control command for which a remote control command response is not returned, and the execution of the remote control command can be completed within the maximum execution completion time of the remote control command.

According to the fourth aspect of the present invention, the controller executes the remote operation commands in the order in which they are received from the remote operation application, and the maximum number of waiting processing of remote operation commands and the remote operation are performed for each remote operation application. Since the maximum execution completion time of the instruction is determined to guarantee the maximum execution completion time of the remote operation instruction, the maximum execution completion time of the remote operation instruction can be guaranteed before the remote operation is started. There is an effect that the execution of the remote operation command can be completed within the maximum execution completion time of the operation command.

According to the fifth aspect of the invention, the shorter the execution completion time of the new remote operation command is compared with the remaining time until the execution completion time of the waiting remote operation command is, the shorter the execution time is earlier. The remote operation application is scheduled so that the remote operation instruction is scheduled to be executed, and the maximum number of processing waits for the remote operation instruction and the maximum execution completion time of the remote operation instruction are guaranteed. Since it is configured to determine each time, it becomes possible to guarantee the maximum execution completion time of the remote operation command before the remote operation starts,
There is an effect that the execution of the remote operation command can be completed within the maximum execution completion time of the remote operation command.

According to the sixth aspect of the present invention, if there is a remote operation command being executed, the remote operation command is waited until the execution time of the remote operation command calculated for each remote operation application, and the remote operation command is executed. Among the remote control commands whose instruction execution wait time has elapsed, the remote control command with the shortest remaining time until the execution completion time is executed, and if there is no remote control command being executed, Schedule to execute the remote operation command with the shortest remaining time, and set the maximum number of waits for the remote operation command and the maximum execution completion time of the remote operation command to ensure the maximum execution completion time of the remote operation command. Determine for each operation application, calculate the execution waiting time of the remote operation instruction that guarantees the maximum execution completion time of the determined remote operation instruction for each remote operation application Since it is configured as described above, it is possible to guarantee the maximum execution completion time of the remote operation command before the remote operation is started, and it is possible to complete the execution of the remote operation command within the maximum execution completion time of the remote operation command. is there.

[0071]

According to the invention described in claim 7 , when the network management node manages the controller and the communication condition between the remote operation application and the controller is negotiated between the remote operation application and the network management node, the negotiation is already negotiated. Between the new remote control application and the controller after guaranteeing the execution of the remote control command according to the maximum number of processing waits for the remote control command and the maximum execution completion time of the remote control command between the remote control application and the controller It is configured to negotiate the maximum number of processing waits for remote control commands and the maximum execution completion time of remote control commands, so when the controller is remotely controlled from the remote control application on the node, the remote control is performed before the remote control starts. The maximum execution completion time of instructions can be guaranteed. It becomes possible to easily build a distributed real-time system, and it is possible to add or delete remote control of a controller by another remote control application without stopping the remote control of the controller by a remote control application. As a result, there is an effect that a method of guaranteeing the execution completion time of the remote operation command can be obtained, which can easily change the configuration of the distributed real-time system.

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal configuration of a controller and a node of a remote operation system to which an execution completion time guarantee method of a remote operation instruction according to a first embodiment of the present invention is applied.

FIG. 2 is a time chart showing a time course of a procedure of a remote control command in the above embodiment.

FIG. 3 is a flowchart showing a flow of negotiation processing of a communication condition negotiation unit in the above embodiment.

FIG. 4 is a block diagram showing an internal configuration of a controller and a node of a remote control system to which a method of guaranteeing execution completion time of a remote control instruction according to a second embodiment of the present invention is applied.

FIG. 5 is a flowchart showing a flow of negotiation processing of a communication condition negotiation unit in the above embodiment.

FIG. 6 is a block diagram showing an internal configuration of a controller of a remote operation system to which a method of guaranteeing execution completion time of a remote operation instruction according to a third embodiment of the present invention is applied.

FIG. 7 is a time chart showing the passage of procedure time of a remote control command in the above embodiment.

FIG. 8 is a flowchart showing a flow of negotiation processing of a communication condition negotiation unit in the above embodiment.

FIG. 9 is a block diagram showing a network configuration of a remote control system to which a method of guaranteeing execution completion time of a remote control command according to a fourth embodiment of the present invention is applied.

FIG. 10 is a block diagram showing internal configurations of a controller, a node, and a network management node in the above embodiment.

FIG. 11 is a block diagram showing a network configuration of a remote operation system to which the execution completion time guarantee method of the present invention and the conventional remote operation instruction is applied.

FIG. 12 is a block diagram showing an internal configuration of a controller and a node of a remote control system to which a conventional method of guaranteeing execution completion time of a remote control command is applied.

FIG. 13 is a flowchart showing a flow of negotiation processing in the communication condition negotiation unit.

[Explanation of symbols]

1 network, 2, 2A, 2B, ..., 2m
Controller, 3, 3A, 3B, ..., 3n node, 10 Remote control application.

Continuation of front page (56) References JP-A-61-49270 (JP, A) Kenji Suzuki, Manufacturing Message Specification (MMS) with time guarantee function added, 39th Annual Meeting of the System Control Information Society Conference Proceedings, System Control Information Society, May 17, 1995, pp. 217-218 Yusuke Tsuruno, MAP to break out towards the new manufacturing revolution! How MMS Meets the Expectations of Users Aiming at CIM (2), Computer & Network LAN, Ohmsha Co., Ltd., June 1, 1993, Vol. 11, No. 6, p. 100-109 (58) Fields surveyed (Int.Cl. ⁷ , DB name) G06F 9/46-9/54 G05B 19/00-19/46 G06F 13/00 G06F 15/00 G06F 15/16-15 / 177

Claims (7)

(57) [Claims] 1. A controller connected to a network
When, and a remote control application residing on one or more nodes connected to the network, the remote steering
Application remotely controls the controller
Before the remote control,
Send the remote control command request via the network,
The controller executes the operation according to the remote operation command request.
The remote operation is performed by using the executed result as a remote operation command response.
In the remote control system that responds to the application, the remote control application requests the controller
The execution of the remote operation instruction that, in the execution completion time guarantee method of a remote control instruction to ensure that completed within the maximum execution completion time of a remote operation command previously determined, the remote control application, the network
Via the remote-controlled controller
Requested value of the maximum number of waiting for remote control commands and remote control commands
The maximum execution completion time of the request is transmitted as a negotiation request, and the controller determines whether the remote operation application
When the above negotiation request is received, the negotiation has already been completed.
Maximum waiting time for remote control commands of remote control applications
Negotiation of the maximum value and the maximum execution completion time of remote control commands
Of remote control instructions, which guarantees the execution of remote control instructions by value
Of the maximum number of processing waits and the maximum execution completion time of remote control commands
Before sending a new negotiation request to satisfy the relational expression
The remote control command is exchanged with the remote control application.
Negotiation of the number of large processing waits and the maximum execution completion time of remote control instructions
And wait for the maximum processing of the remote control command determined by
Negotiation of the maximum value and the maximum execution completion time of remote control commands
In response to the value to the remote control application, the remote control application is the remote operation co
The remote control command from the negotiation response received from the controller
Value of the maximum number of queues to be processed and the maximum execution completion of remote operation commands
Once the negotiation time negotiation value is obtained, the
The number of processing waits for remote control commands is the maximum
If it is not more than the negotiated number of waiting numbers,
A method of guaranteeing the completion time of execution of a remote operation command, characterized by transmitting a new remote operation command request . 2. When the execution of the remote operation command is completed, the controller returns a remote operation command response to the remote operation application requesting the remote operation command, and the remote operation application requesting the remote operation command is By confirming the completion of execution of the requested remote operation command by receiving the remote operation command response, the number of processing waits for the remote operation command is known. The remote operation command execution completion time guarantee method according to claim 1, wherein a new remote operation command is requested after confirming that there is no remote operation command. 3. The remote control application that has requested a remote control command assumes that the requested remote control command has completed execution when the maximum execution completion time of the requested remote control command has elapsed after the remote control command was requested. The number of remote operation command processing waits is grasped, and it is confirmed that the current number of remote operation command processing waits is not more than the maximum number of remote operation command processing waits and a new remote operation command is requested. The method of guaranteeing execution completion time of a remote operation command according to claim 1. 4. The controller executes the remote control commands from the remote control application in the order in which they are received, and sets the maximum waiting number of the remote control commands that have already been negotiated.
The threshold value and the maximum execution completion time of remote control commands
Maximum processing of remote control commands, ensuring execution of remote control commands
The relational expression between the number of waits and the maximum execution completion time of remote control instructions
4. The remote operation command execution completion time guarantee method according to claim 2, wherein the maximum number of processing waits for the remote operation command and the maximum execution completion time are determined for each of the remote operation applications so as to be satisfied. . 5. The controller compares the remaining time until the execution completion time of the remote operation command waiting to be executed with the execution completion time of a new remote operation command, and the shorter one is executed first. And the maximum execution completion time of the remote operation instruction and the maximum execution completion time of the remote operation instruction for guaranteeing the maximum execution completion time of the remote operation instruction are determined for each of the remote operation applications. 4. The method of guaranteeing the execution completion time of a remote operation command according to claim 3, wherein. 6. The controller waits for execution of a remote operation command until the execution waiting time calculated for each remote operation application when there is a remote operation command being executed, and waits for execution of the remote operation command. Among the remote control commands that have passed the time, the remote control command that has the shortest remaining time until the execution completion time of the remote control command is executed, and if there is no remote control command that is being executed, the execution of the remote control command is awaited. The remote operation command is scheduled to be executed with the shortest remaining time up to the time, and the maximum number of processing waits for the remote operation command and the maximum number of remote operation commands that can guarantee the maximum execution completion time of the remote operation command against the schedule. Waiting for execution of a remote operation command that determines the execution completion time for each remote operation application and guarantees the maximum execution completion time of the determined remote operation command The method for guaranteeing the completion time of execution of a remote operation command according to claim 2 or 3, wherein the interval is calculated for each of the remote operation applications. 7. A controller connected to a network
When, and a remote control application residing on one or more nodes connected to the network, the remote steering
Application remotely controls the controller
Before the remote control,
Send the remote control command request via the network,
The controller executes the operation according to the remote operation command request.
The remote operation is performed by using the executed result as a remote operation command response.
In the remote control system that responds to the application, the remote control application requests the controller
The execution of the remote operation instruction has, in the execution completion time guarantee method of a remote control instruction to ensure that completed within pre maximum execution completion time of a remote operation instruction determined to have been connected to the management of the controller to the network In the network management node, the remote control application operates the network.
Via the remote controller,
Maximum number of processing waits for remote control commands and maximum number of remote control commands
Request for negotiation of line completion time to the network management node
And the network management node sends the remote control application.
When the negotiation request is received from the
Remote application that has completed negotiations with
Negotiation value of the maximum number of waiting for remote control commands and remote control
Of the remote operation command at the negotiation value of the maximum execution completion time of the operation command
Maximum number of waiting for remote control commands and remote control to guarantee execution
To satisfy the relational expression with the maximum execution completion time of the operation command
, A new negotiation request was sent with the controller.
The maximum number of remote control commands to / from the remote control application
Negotiation of the number of large processing waits and the maximum execution completion time of remote control instructions
And wait for the maximum processing of the remote control command determined by
Negotiation of the maximum value and the maximum execution completion time of remote control commands
In response to the value to the remote control application, the remote control application is the remote operation co
The remote control command from the negotiation response received from the controller
Value of the maximum number of queues to be processed and the maximum execution completion of remote operation commands
Once the negotiation time negotiation value is obtained, the
The number of processing waits for remote control commands is the maximum
If it is not more than the negotiated number of waiting numbers,
A method of guaranteeing the completion time of execution of a remote operation command, characterized by transmitting a new remote operation command request .