JP2503861B2 - Supervisory control method - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is used in a satellite communication earth station. INDUSTRIAL APPLICABILITY The present invention is used for supervisory control of a process in which a local unit of a satellite earth station transmits a state change to a supervisory controller located at a remote place. The present invention relates to a supervisory control system capable of transmitting a state change from each local device to a supervisory control device in a short time.

[0002]

2. Description of the Related Art Conventionally, this type of supervisory control system has been used to shorten the time until the information is reflected in the supervisory control device when the state of the local device changes. For example, Japanese Patent Application Laid-Open No. 61-87453 discloses a technique of collecting information by changing the polling format from the monitor control device to make only all measurement / monitor data and status changes into packets.

[0003]

In such a conventional supervisory control system, polling from the supervisory control device is provided with a type and the state change from the local device is detected according to the contents of the polling. On the other hand, a state change cannot be obtained unless polling is repeated.
Therefore, it takes time until the state change is displayed on the monitor control device. In addition, since all monitoring data that has changed state is put on the packet, if there are many state changes, the length of the packet to be sent becomes long,
There is the same problem as when collecting all monitoring data for each polling.

The present invention solves such a problem, and an object thereof is to provide a system capable of shortening the packet length and transmitting the state change of each local device to the supervisory control device in a short time. .

[0005]

According to the present invention, a plurality of local devices are connected to one supervisory control device, and the supervisory control device communicates with the local device via the communication control means. A monitoring packet processing means for processing the monitoring packet to be processed, and a communication control unit for communicating with the monitoring control device for each of the local devices; and the local device via the communication control unit. Second monitoring packet processing means for processing a monitoring packet transmitted and received , and the local unit from the monitoring device.
The local device, and the local device
Monitoring packets are monitored according to the paging of monitoring devices.
In a supervisory control method comprising means for mounting data and transmitting the data to the supervisory apparatus, the supervisory control apparatus associates a supervisory control item of the local apparatus with a status identifier set in a packet. A monitoring control table including a status table is provided, and each of the local devices is provided with a second status table that associates a monitoring control item with a status identifier set in a packet.
When the status change is occurring,
To create the packet, and
When the packet is polled from the
If no change has occurred, do not set the transmission flag,
Packet status when polling is received from the monitoring controller
It is characterized by including means for inserting NULL into the state identifier and transmitting it.

The first monitoring packet processing means includes a first buffer for temporarily holding a received packet, a packet analysis processing section for taking out a packet from the first buffer and performing an analysis process, and the analyzed information. A display control processing unit for performing display control of the state change by the display control unit, a display unit for displaying the state change under the control of the display control processing unit, and a first packet creation process for creating a packet based on the information from the display control processing unit. The second monitoring packet processing means includes a data processing unit that processes received data, a second buffer that temporarily holds the processed data, and the data processing that detects a state change. And a second packet creation processing unit that creates a packet in response to a request from the communication control unit,
It is preferable that the first packet creation processing unit includes a unit that refers to the monitoring control table and analyzes a state change notified from the local device to create and output a control command.

Furthermore, the packet which the second packet creation processing unit before Symbol creates desirably includes device identifier and status identifiers.

[0008]

The device identifier (ID) for recognizing the local device and all the states are registered in the state table in advance. This table is used to translate the identifier set in the packet into a form that is easy to analyze.

The packet creation is executed when the local device is polled by the supervisory controller. At this time, the transmission flag is checked to determine whether or not the state has changed. If it is "1", the status identifier is taken out from the buffer and set to an empty status. Next, a packet is created, the transmission flag is set to "0", and the packet is transmitted. When the transmission flag is "0", NULL is inserted in the packet and the packet is transmitted. If the local device detects a state change,
The status table is searched to convert the status change into a status identifier. Since there is a status change, the transmission flag is set to "1",
Write the state identifier to the buffer and have the next state change.

By thus analyzing the status change by the local device, the length of the transmission packet can be shortened and the time until the status change is displayed can be shortened.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a diagram showing an overall configuration according to an embodiment of the present invention, FIG. 2 is a block diagram showing a configuration of an embodiment of the present invention, and FIG. 3 is a block diagram showing a configuration of a local device in the embodiment of the present invention.

In the embodiment of the present invention, a supervisory control device 20 is provided in an earth station which communicates via a satellite, and a plurality of local devices (1) to (N) are connected to the supervisory control device 20 for supervisory control. The device 20 includes a communication control unit 16 and a first monitor packet processing unit 21 that processes a monitor packet transmitted / received to / from the local devices (1) to (N) via the communication control unit 16. Device (1) ~
Each of (N) processes a communication control unit 1 that communicates with the monitoring control device 20, and a monitoring packet that is transmitted / received to / from the local devices (1) to (N) via the communication control unit 1. Further, as a feature of the present invention, the monitoring control device 20 is provided with a second monitoring packet processing means 22, and monitoring control items of the local devices (1) to (N) and a status identifier (hereinafter, STATUS) set in the packet. Called ID)
A first state table 13 and a device ID that correspond to
A monitoring control table 12 including a table 14 is provided, and a second status table 17 that associates each of the local devices (1) to (N) with a monitoring control item and a STATUS ID set in the packet.

The first monitor packet processing means 21 includes a first buffer 15 for temporarily holding a received packet,
A packet analysis processing unit 10 that takes out a packet from the first buffer 15 and performs an analysis process, and a display control processing unit 9 that performs a display control of a state change according to the analyzed information.
And a first packet creation processing unit 11 that creates a packet based on information from the display control processing unit 9, and a second monitoring unit. The packet processing unit 22 includes a data processing unit 6 that processes received data, a second buffer 5 that temporarily holds the processed data, and a state change detection that detects a state change and notifies the data processing unit 6 of the state change. The circuit 7 and the second packet creation processing unit 4 that creates a packet in response to a request from the communication control unit 1 are provided.

Further, the first packet creation processing section 11 is provided with means for referring to the monitoring control table 12 to analyze the status change notified from the local devices (1) to (N) and create and output a control command. Including, the second packet creation processing unit 4 creates a packet by setting the transmission flag 2 when a status change occurs, and sends the packet when polling is received from the monitoring control device 20, When no change has occurred, the transmission flag 2 is not set, and the STAT of the packet when polling is received from the monitor control device 20.
Includes means for inserting NULL into the US ID and transmitting,
The packet created by the second packet creation processing unit 4 includes the device ID and the STATUS ID.

FIG. 4 is a diagram showing the structure of the monitoring control table in the embodiment of the present invention. This monitoring control table 12
Includes a device ID table 14 and a first status table 13. The first state table 13 is common, each local device (1) to (N) is owned, and STATUS of all local devices (1) to (N) is defined. The device ID of the device ID table 14 is
It is built in the communication control unit 1 of each of the local devices (1) to (N) in advance, and is judged when polling is received. 5 (A) and 5 (B) are diagrams showing the packet format in the embodiment of the present invention, and FIG. 5 (C) is a diagram showing the format in the conventional example.

The operation of setting the transmission flag 2 when the state change occurs in the local devices (1) to (N) according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is a flow chart showing the flow of the operation. Local device (1) ~
When a state change occurs, (N) notifies the data processing unit 6 of the state change by the state change detection circuit 7,
The data processing unit 6 determines which STATUS ID is to be used from the first state table 13, and the selected STATUS ID is the second packet creation processing unit 4.
And is stored in the second buffer 5. At this time, the data processing unit 6 informs the transmission flag 2 that a state change has occurred and sets the flag to "1".

Next, the operation when the local devices (1) to (N) receive polling from the monitoring control device 20 will be described with reference to FIGS. 2 and 7.

When the local devices (1) to (N) receive polling, the communication control unit 1 of the local devices (1) to (N) requests the second packet creation processing unit 4 to create a packet. Here, the second packet creation processing unit 4 judges whether the transmission flag 2 is "1", and if the transmission flag is "0", the STATUS I of the packet shown in FIG.
D is set to NULL to create a packet, and the packet is passed to the communication control unit 1 to transmit the packet.

When the communication flag 2 is "1" (when a state change occurs), the first packet creation processing unit 4 is requested by the communication control unit 1 to create a packet, and then STAT.
Refer to the second buffer 5 for the USID, and STA
After collecting the TUS ID, the second buffer 5 is cleared. A packet of the format shown in FIG. 5 is created by combining the STATUS ID and the device ID, and the packet is transmitted from the communication control unit 1 to the monitoring control device 20.

Next, the operation when the supervisory control device 20 receives a packet and the case of controlling the local devices (1) to (N) will be described with reference to FIGS. 2 and 8.

When the local devices (1) to (N) have a state change and a packet is received, the communication control means 16 writes the received packet in the first buffer 15 and a packet analysis process is performed to determine that the packet has been received. Tell Part 10. The packet analysis processing unit 10 takes out the packet from the first buffer 15 and searches the predefined monitor control table 12 for the device name and the STATUS having the state change. After the device name and STATUS are known, the information is transmitted to the display control processing unit 9 to display the status change. When a NULL packet is received, only the device ID is written in the first buffer 15, and the packet analysis processing unit 10
Confirms that the device has been linked.

Next, the case of performing control will be described.
Device name and status controlled by the display control processing unit 9
In response to the request, the first packet creation processing unit 11 creates a command (packet) including the device ID and the STATUS ID by referring to the monitoring control table 12. The created packet is transmitted by the communication control means 16 similarly to polling.

[0023]

As described above, according to the present invention, the length of a packet to be transmitted can be shortened, so that the transmission time can be shortened.
This has the effects of being able to shorten the transmission efficiency, improving the transmission efficiency, and determining whether or not the link with the local device has been established by the supervisory control device.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a local device according to an embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a monitoring control table in the embodiment of the present invention.

5A and 5B are diagrams showing a packet format in the embodiment of the present invention, and FIG. 5C is a diagram showing a packet format in a conventional example.

FIG. 6 is a flowchart showing an operation flow when a state change occurs in the local device in the embodiment of the present invention.

FIG. 7 is a flowchart showing an operation flow when the local device receives polling in the embodiment of the present invention.

FIG. 8 is a flowchart showing an operation flow when the monitoring control device according to the embodiment of the present invention receives a packet.

[Explanation of symbols]

 1 Communication Control Section 2 Transmission Flag 4 Second Packet Creation Processing Section 5 Second Buffer 6 Data Processing Section 7 State Change Detection Circuit 8 Display Section 9 Display Control Processing Section 10 Packet Analysis Processing Section 11 First Packet Creation Processing Section 12 supervisory control table 13 first state table 14 device ID table 15 first buffer 16 communication control means 17 second state table 20 supervisory control device 21 first supervisory packet processing means 22 second supervisory packet processing means ( 1) to (N) Local device

Claims (3)

(57) [Claims] 1. A plurality of local devices are connected to one monitoring control device, and the monitoring control device processes a communication control unit and a monitoring packet transmitted to and received from the local device via the communication control unit. A first supervisory packet processing means, and a communication control unit that communicates with the supervisory control device to each of the local devices; and a supervisory packet transmitted to and received from the local device via the communication control unit. a second monitoring packet processing means for processing, the polling to the local device from the monitoring device
And the local device is pinged by the monitoring devices.
The monitoring packet is loaded with monitoring data according to
In the supervisory control method, the supervisory control method includes: a first state table that associates the supervisory control device with a supervisory control item of the local device and a state identifier set in a packet. comprising a table, to each of the local device, comprising a second state table to associate the state identifier is set to the monitoring control the entry packet, the second packet creation processing section, it has occurred state change
When setting the transmission flag, create the packet and
When the polling is received from the supervisory control device, the packet
Flag is sent and the status flag has not changed, the send flag
Polled from the supervisory controller without standing up
When inserting NULL in the status identifier of the packet
A supervisory control system characterized by including means for controlling. 2. The first monitoring packet processing means includes a first buffer that temporarily holds a received packet, a packet analysis processing unit that extracts a packet from the first buffer and performs an analysis process, and an analysis process. A display control processing unit for performing display control of the state change according to the information, a display unit for displaying the state change under the control of the display control processing unit, and a first packet for creating a packet by the information from the display control processing unit. A second processing packet processing means for processing the received data; a second buffer for temporarily holding the processed data; A state change detection circuit for notifying a data processing unit; and a second packet creation processing unit for creating a packet in response to a request from the communication control unit. Packet creation processing unit of the monitoring control system of claim 1 further comprising a means for creating output the reference to the monitoring control table analyzes the state change the notified from the local device control command. 3. The second packet creation processing unit creates
The monitoring packet containing the device identifier and status identifier
No claim 1 monitor and control system as claimed.