JP2531286B2 - Remote control monitoring method - Google Patents

Description

The present invention relates to a remote control monitoring system, and more particularly to a remote control monitoring of a controlled monitoring device including a plurality of subsystems such as a communication device which constitutes a satellite communication earth station. Remote control monitoring system.

[Prior Art] For example, in a satellite communication small earth station, a communication device including a plurality of subsystems constituting the earth station is provided with one
One control and monitoring device is provided, and each subsystem of the communication device is controlled and monitored by this control and monitoring device. The control monitoring device is connected to each subsystem of the communication device that is a controlled monitoring device by multiple serial ports, sends control packets to each subsystem, and each subsystem returns in response to the control packet. It receives a packet, controls and monitors the controlled monitor device, and holds status information.

There is also a remote control monitoring system in which a remote control station is provided at a place distant from such an earth station, and the controlled monitoring device can also be controlled and monitored from this remote control station. In such a remote control monitoring system, it is economically unrealistic to connect the earth station and the remote control station with the same number of lines as the serial port that the control and monitoring device of the earth station has for the controlled and monitored device. Therefore, there is one serial data line connection between the earth station and the remote control station. Therefore, various data packets for control and monitoring, which the earth station transmits / receives to / from the remote control station via one serial data line, are transmitted / received to / from a plurality of serial ports of the controlled / monitored device of the control / monitoring device. It is necessary to manage the transfer of control right. In the conventional remote control monitoring method, all of this control management is processed by the control device.

[Problems to be Solved by the Invention]

By the way, there is a demand to provide a plurality of remote control stations and switch the stations that perform control monitoring during the day, morning and evening, and night. However, the above-described conventional remote control monitoring method has a drawback that the load of the control monitoring apparatus becomes excessive due to an increase in the control management processing for making a plurality of remote control stations.

It is an object of the present invention to provide a remote control monitoring system in which a plurality of remote control stations can be provided without increasing the load on the control monitoring device.

[Means for solving the problem]

The remote control monitoring system of the present invention is provided between a local station including a control monitoring device for controlling and monitoring a controlled monitoring device via a plurality of serial ports, and the control monitoring device installed apart from the local station. In a remote control monitoring system including a remote control station for remotely controlling and monitoring the controlled monitoring device by transferring control right, a plurality of the remote control stations and a control management device for managing the transfer of the control right. Is included.

The control management device included in the remote control monitoring system of the present invention may unconditionally pass the control right to the control monitoring device at the request of the control monitoring device.

Further, the control management device transmits the control command received from the remote control station having the control right to the control monitoring device and discards the control command received from the remote control station not having the control right. You may

Further, the control management device may receive the status information of the controlled monitoring device from the control monitoring device, hold it internally, and transmit it to the remote control station.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

 FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, reference numeral 4 denotes a small earth station, which communicates with a communication device 10 in a satellite communication system. 1-3
Is a remote control station that remotely controls and monitors the communication device 10 of the earth station 4.

The earth station 4 includes a communication device 10, a control monitoring device 20 connected by serial ports (SP) 11 to 18 and SP21 to 28 of the communication device 10, and SP29 and SP34 of the control monitoring device 20.
The control management device 30 and the control management device 30 connected by
Modulator / demodulator (MD) 41,4 connected to SP31,32,33
It is configured with 2,43 and.

The remote control stations 1, 2, and 3 are configured to include an MD 50 that communicates with the MDs 41, 42, and 43 included in the earth station 4 via a serial data line, and a terminal device 60 connected to the MD 50.

Control and monitoring device 20 of earth station 40 and remote control stations 1, 2, 3
Each of the terminal devices 60 has a function of controlling and monitoring the communication device 10, and the control management device 30 of the earth station 4 manages the transfer of the control right as to which of these four devices performs control monitoring. . The control and monitoring device 20 has priority over the request for the control right. Therefore, when the control monitoring device 20 requests the control right when any of the remote control stations 1, 2 and 3 has the control right, the control management device 30 transfers the control right to the control monitoring device 20.
Unconditionally transfer to.

The operation of each device of the embodiment shown in FIG. 1 will be described below.

The control and monitoring device 20 generates the required control packet by itself when it has the control right, and the generated control packet,
Alternatively, the control packet received via SP29 when not having control right is transmitted to the communication device via appropriate SP21-28.
10 to SP11-18, the communication device 10 receives the monitoring packet transmitted from SP11-18 via SP21-28, to control and monitor the communication device 10 and hold the status of the communication device 10. There is. The received monitor packet updates the held status and is also sent from SP29.

The control management device 30 determines the location of the control right as described above in response to a request for the control right from the control monitoring device 20 or the remote control stations 1 to 3, and the determined result is the control monitoring device 20. It also notifies the remote control stations 1 to 3 and holds it by itself. In addition, the status of the communication device 10 held by itself is always matched with the status held by the control and monitoring device 20 by updating with the monitoring packet received from the control and monitoring device 20 via SP34. The received monitoring packet is further transmitted from SP31-33. When the serial data line with remote control station 1, 2 or 3 is established, the status held is the SP corresponding to that line.
Sent from. Furthermore, when a control packet is received from the remote control station 1, 2 or 3 via the corresponding SP, it is judged whether or not the remote control station that has sent this control packet currently has the control right. Sends out the received control packet from SP34, and discards the received control packet if there is none.

The terminal device 60 of the remote control station 1, 2, 3 communicates with the control management device 30 via the MD50, serial data line, MD41, 42, 43, SP31, 32, 33, and the communication device as described below. Remotely monitor 10 and keep status.

Since the terminal device 60 has only one port on the side of the earth station 4 and cannot simultaneously input / output a plurality of data packets, it has a control / monitoring function equivalent to the control / monitoring device 20 except for this point. In this embodiment, it is realized by a personal computer.

When the remote control station 1, 2 or 3 is powered on and the corresponding serial data line with the earth station 4 is established, the status transmitted from the control management device 30 causes the terminal device 60 to hold its own status. The initial state of the control management device 30 is set and then updated by the monitoring packet sent from the control management device 30, so that the status managed by the control management device 30 is retained by the control management device 30 (this status is maintained by the control monitoring device 20 Match the status you want to). The terminal device 60 of the remote control station having the control right generates a required control packet, and this control packet is MD50, serial data line, MD41, 42 or 43.
Then, the communication device 10 is transferred to the control management device 30 via the control management device 30, and the communication device 10 is controlled via the control monitoring device 20 as already described.

Here, the control and monitoring device 20 in the embodiment shown in FIG.
Now, let's compare the load with the load of the control and monitoring device in the conventional example. The conventional control and monitoring apparatus exchanges various data packets for control and monitoring with one remote control station. The control and monitoring device 20 in this embodiment also has only one port SP29 on the remote control station side, and therefore the loads for sending and receiving various data packets to and from the remote control station side are substantially equal. However, in the conventional example, the control monitoring device itself performs the decision about whether the control right is on the control monitoring device side or the remote control station side and the processing related to this decision, whereas the control monitoring device itself performs the decision. Control management device
Have 30 done. Therefore, the load of the control and monitoring device 20 in this embodiment is smaller than the load of the control and monitoring device in the conventional example.

〔The invention's effect〕

As described above, the present invention increases the load on the control and monitoring device by providing the control and monitoring device provided in the local station and the control management device for managing the transfer of the control right between the plurality of remote control stations. Instead, the controlled monitoring apparatus can be remotely controlled and monitored from a plurality of remote control stations without reducing the number of remote control stations. Therefore, remote control and monitoring can be performed from a plurality of different locations.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 1-3 ... Remote control station, 4 ... Earth station, 10 ... Communication device, 11-18, 21-29, 31-34 ... Serial port, 20 ...
Control monitoring device, 30 ... Control management device, 41-43, 50 ... Modulation / demodulation device, 60 ... Terminal device.

Claims (4)

(57) [Claims] 1. A control right is provided between a local station including a control and monitoring device that controls and monitors a controlled monitoring device via a plurality of serial ports, and a control right between the local station and the control and monitoring device. In a remote control monitoring system comprising: a remote control station that delivers and remotely controls and monitors the controlled monitoring device,
A remote control monitoring system comprising: a plurality of the remote control stations; and a control management device that manages the transfer of the control right. 2. The remote control monitoring system according to claim 1, wherein the control management device unconditionally transfers the control right to the control monitoring device in response to a request from the control monitoring device. 3. The control management device transmits a control command received from the remote control station having the control right to the control monitoring device, and sends a control command received from the remote control station not having the control right. The remote control monitoring system according to claim 1 or 2, wherein the remote control monitoring system is discarded. 4. The control management device is adapted to receive status information of the controlled monitoring device from the control monitoring device, hold the status information internally, and transmit the status information to the remote control station. The remote control monitoring system according to claim 1, 2 or 3.