JP7500375B2 - Remote Control System - Google Patents

Description

The present invention relates to a remote control system that remotely monitors each piece of equipment in a broadcasting system, and in particular to a remote control system that provides multiple individual remote control systems between the same locations, allowing them to complement each other in the event of an abnormality, continue monitoring and controlling the equipment, and improve convenience and the reliability of the entire system.

Broadcasting systems are equipped with a remote control system that remotely monitors and controls various equipment such as FPUs (Field Pickup Units). Examples of remote control systems include FPU remote control systems and transmitting station remote control systems.

The FPU remote control system is a remote control system that remotely monitors the FPU base station, which serves as a relay point for transmitting live video captured at the live broadcast site to the head office.
The transmitting station remote control system is a remote control system that remotely monitors a transmitting station system that transmits radio waves that can be viewed on a television and are sent from the head office.

Each remote control system has a remote control operation terminal (monitoring terminal) for that system at least in the head office, which manages and monitors the status of the entire system.
Therefore, each remote control system generally has a control terminal station at the head office and a controlled terminal station at the transmitting station or base station.Each remote control terminal station remotely controls the related system equipment located within its station building, consolidates information, and transmits that information to the head office where the operating terminal is located via inter-site lines such as IP, serial, and voice.

[Example of remote control system configuration: Figure 7]
An example of the configuration of a typical remote control system will be described with reference to Fig. 7. Fig. 7 is an explanatory diagram showing an example of the configuration of a typical remote control system.
As shown in FIG. 7, the remote control system comprises a remote control terminal A (10a), a remote control terminal B (10b) (sometimes referred to as remote control terminal 10 when there is no need to distinguish between the two), an operation terminal 11a, an operation terminal 11b (sometimes referred to as operation terminal 11), and a database 12a, a database 12b (sometimes referred to as database 12).

Of these, the remote control terminal A (10a), the operation terminal 11a, and the database 12a are provided at the location A, while the remote control terminal B (10b), the operation terminal 11b, and the database 12b are provided at the location B.
Site A and site B are connected by an inter-site line.

The inter-site lines are configured redundantly using various lines such as LAN, serial, and voice lines, and in the example of FIG. 7, include an IP line 13 equipped with a HUB 14 and a four-wire telephone line 15 equipped with a modem 16.
As a result, the remote control terminals 10a and 10b share information by transmitting and receiving the information they have acquired using the IP line 13 or the four-wire telephone line (4W line) 15. In other words, within the same remote control system, each remote control terminal 10 can also acquire information acquired by remote control terminals installed at different locations (at least one of the remote control terminals aggregates information from both locations).

The operation terminal 11a acquires information from the remote control terminal 10a, stores it in a database 12a, displays it as necessary, and controls each piece of equipment in the system.
Similarly, the operation terminal 11b acquires information from the remote control terminal 10b, stores it in a database 12b, displays it, and controls the system equipment.
By acquiring information from the remote control terminal 10 at the same location, the operation terminal 11 can also acquire information at other locations within the system without communication between the locations.

When the operation terminal 11 controls system equipment, if the equipment is located at a transmitting station or a base station, the control signal is transmitted via an inter-site line.
Depending on the importance of the system, the operation terminal 11 may also be provided at the transmitting station or base station.
In order for the information managed by the operation terminal 11 at the head office to be referenced by the operation terminals 11 at the transmitting station or base station, the system equipment information aggregated at the control terminal station at the head office is transmitted to the remote control terminal station 10 at the transmitting station or base station via an inter-site line.

[When multiple remote control systems are installed]
In addition, there are cases where a plurality of different types of remote control systems are installed, that is, a plurality of remote control systems are provided between the head office and the base.
The type and transmission method of monitoring information often differ depending on the type of remote control system. Here, each type of remote control system is referred to as an individual remote control system.

For example, in the FPU remote control system, which is one type of individual remote control system, the angle information of the rotating antenna device installed in the FPU is continuously and efficiently communicated by separating the antenna angle and the reception state of the receiver connected to the antenna individually and sending only that part.

Also, each individual remote control system has a slightly different importance depending on its type.
In particular, the transmitter remote control that controls the broadcast wave output to ordinary households requires high stability and reliability, so the system equipment is often configured to be more reliable than other broadcasting systems.

For these reasons, even when various individual remote control systems are configured to connect the same locations, the remote control terminal equipment, its communication method, the inter-location lines for remote control, and the monitoring and control equipment are often independent.
This is for reasons such as preventing a malfunction of one system from affecting another system, and for efficient communication by taking advantage of the individual characteristics of each remote control system.

[Related Technology]
Incidentally, a conventional technique relating to a remote control system is disclosed in Japanese Patent Laid-Open Publication No. 2004-32440 entitled "FPU Remote Control System" (Patent Document 1).
Patent Document 1 describes measuring the propagation state of received radio waves in the receiving equipment of an FPU, and displaying the measured data as a waveform of an OFDM delayed wave on the screen of an automatic control device.

JP 2004-32440 A

However, as mentioned above, conventional remote control systems have the problem that even if multiple individual remote control systems are installed between the same locations, each system is independent and cannot complement each other when an abnormality occurs, which is inconvenient.

Note that Patent Documents 1 and 2 do not mention the provision of multiple individual remote control systems between the same locations to complement each other in communications in the event of an abnormality and continue to monitor and control the equipment.

The present invention has been made in consideration of the above situation, and aims to provide a remote control system that can provide multiple individual remote control systems between the same locations, mutually complement each other in communications in the event of an abnormality, and continue to monitor and control equipment, thereby improving convenience and the reliability of the entire system.

The present invention, which aims to solve the problems of the above-mentioned conventional examples, provides a remote control system having a remote control terminal for remotely controlling a video signal transmission device, comprising a first system in which a first remote control terminal and a second remote control terminal are connected by a first communication method, and a second system in which a third remote control terminal and a fourth remote control terminal are connected by a second communication method, the first remote control terminal and the third remote control terminal are connected by a third communication method, and the second remote control terminal and the fourth remote control terminal are connected by a fourth communication method, and the third communication method and the fourth communication method are used when the first communication method or the second communication method is abnormal , and when the first remote control terminal receives data addressed to the fourth remote control terminal from the third remote control terminal via the third communication method but does not receive data addressed to the third remote control terminal from the second remote control terminal via the first communication method, it is characterized in that it determines that an abnormality has occurred in the fourth remote control terminal .

The present invention is also characterized in that, in the above remote control system, when the second communication method becomes abnormal, the third remote control terminal transmits data addressed to the fourth remote control terminal to the first remote control terminal using the third communication method, the first remote control terminal transmits data to the second remote control terminal using the first communication method, the second remote control terminal transmits data to the fourth remote control terminal via the fourth communication method, the fourth remote control terminal transmits data addressed to the third remote control terminal to the second remote control terminal via the fourth communication method, the second remote control terminal transmits data to the first remote control terminal via the first communication method, and the first remote control terminal transmits data to the third remote control terminal via the third communication method.

The present invention is also characterized in that, in the above remote control system, when the remote control terminal uses the third or fourth communication method, the remote control terminal includes information indicating an abnormality in the transmission data and transmits a smaller amount of data than normal.

The present invention is also characterized in that the remote control system includes a monitoring terminal connected to the first or second communication method, and when an abnormality occurs in either remote control terminal or in either communication method, the abnormality is displayed on the monitoring terminal.

According to the present invention, a remote control system having a remote control terminal for remotely controlling a video signal transmission device is provided, comprising: a first system in which a first remote control terminal and a second remote control terminal are connected by a first communication method; and a second system in which a third remote control terminal and a fourth remote control terminal are connected by a second communication method, the first remote control terminal and the third remote control terminal are connected by the third communication method, and the second remote control terminal and the fourth remote control terminal are connected by the fourth communication method, the third communication method and the fourth communication method are used when the first communication method or the second communication method is abnormal , and the first remote control terminal receives data addressed to the fourth remote control terminal from the third remote control terminal via the third communication method, This remote control system determines that an abnormality has occurred in the fourth remote control terminal if data addressed to the third remote control terminal is not received from the second remote control terminal via the first communication method.Therefore, when an abnormality occurs in the first communication method or the second communication method, which is the inter-base line of the first or second system, the communication in the system in which the abnormality has occurred can be supplemented by using the inter-base line of the normal system and the third and fourth communication methods.The equipment of the system in which the abnormality has occurred can also be continuously monitored and controlled by the operation terminal, improving convenience and reliability of the entire system.It is also possible to detect an abnormality in a remote control terminal in another system and distinguish it from a line abnormality, which has the effect of enabling recovery work to be carried out quickly .

In addition, according to the present invention, when the remote control terminal uses the third or fourth communication method, the remote control system transmits data containing information indicating an abnormality and transmits a smaller amount of data than normal, so that the other system in which no abnormality is occurring can be notified of the occurrence of an abnormality, and communication can be performed without straining the communication of the other system.

FIG. 1 is an explanatory diagram showing a schematic configuration of the remote control system. FIG. 11 is an explanatory diagram showing communication using an extended interface. FIG. 13 is an explanatory diagram showing a display example in a tunneling mode. FIG. 11 is an explanatory diagram showing a display example in an emergency communication mode. 11 is an explanatory diagram showing the operation when detecting an abnormality in a remote control terminal of another system. FIG. FIG. 1 is an explanatory diagram showing an application example of the present remote control system. FIG. 1 is an explanatory diagram showing an example of the configuration of a typical remote control system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
[Outline of the embodiment]
A remote control system according to an embodiment of the present invention (this remote control system) comprises a first individual remote control system in which a first remote control terminal station and a second remote control terminal station are connected by a first inter-site line between the same bases, and a second individual remote control system in which a third remote control terminal station and a fourth remote control terminal station are connected by a second inter-site line, the first remote control terminal station and the third remote control terminal station in one base are connected by a third communication line, and the second remote control terminal station and the fourth remote control terminal station in the other base are connected by a fourth communication line, and the third communication line and the fourth communication line are used as a remote control system when an abnormality occurs in the first inter-site line or the second inter-site line. When an abnormality occurs in the inter-site line of one individual remote control system, the inter-site line of the other individual remote control system and the third and fourth communication lines using an extended interface can be used to continue monitoring and control of the equipment of the individual remote control system in which an abnormality has occurred via the other individual remote control system at the operation terminal of the head office, thereby improving convenience and the reliability of the entire system.

[Configuration of a remote control system according to an embodiment: FIG. 1]
The schematic configuration of this remote control system will be described with reference to Fig. 1. Fig. 1 is an explanatory diagram showing the schematic configuration of this remote control system.
As shown in FIG. 1, the present remote control system includes an individual remote control system (1) and an individual remote control system (2) between a site A and a site B.

The individual remote control system (1) connects remote control terminal station 1A (1a) (hereinafter referred to as remote control terminal station 1a) at site A and remote control terminal station 1B (1b) (remote control terminal station 1b) at site B via an inter-site line (IP line) 3, and HUBs 4a and 4b are provided on the inter-site line 3. The inter-site line 3 corresponds to the first communication method described in the claims.

The individual remote control system (2) connects remote control terminal station 2A (2a) (hereinafter referred to as remote control terminal station 2a) at site A and remote control terminal station 2B (2b) (remote control terminal station 2b) at site B with an inter-site line (4W line) 5 via modem 6. The inter-site line 5 corresponds to the second communication method described in the claims.

And usually (normally), individual remote control system (1) and individual remote control system (2) operate independently without any interaction with each other, and each remote control terminal monitors the status of the equipment, shares information within the same individual remote control system, and controls the equipment.

In FIG. 1, for the sake of simplicity, the individual remote control system (1) is provided with only an inter-site line (IP line) 3, and the individual remote control system (2) is provided with only an inter-site line (4W line) 5; however, the individual remote control system (1) may be provided with an additional inter-site line via a 4W line, and the individual remote control system (2) may be provided with an inter-site line via an IP line.
Although the operation terminal is also omitted, an operation terminal may be provided for each individual remote control system at each base.

A feature of this remote control system is that each remote control terminal is equipped with an extended communication interface (extended interface), and remote control terminals within the same location are connected by extended interface lines.

That is, in this remote control system, the remote control terminal station 1a and the remote control terminal station 2a at site A are connected by an extended interface line 7, and the remote control terminal station 1b and the remote control terminal station 2b at site B are connected by an extended interface line 8. The extended interface lines 7 and 8 respectively correspond to the third and fourth communication methods described in the claims.
Each remote control terminal stores information about the remote control terminal connected via the extended interface line 7 or 8 in advance.

The extended interface line 7 has extended interface lines 71 and 72 and performs bidirectional communication; similarly, the extended interface line 8 performs bidirectional communication using extended interface lines 81 and 82.

As described above, under normal circumstances, remote control system (1) communicates with remote control terminal stations 1a and 1b via inter-site line 3, and remote control system (2) communicates with remote control terminal stations 2a and 2b via inter-site line 5. Therefore, extension interface lines 7 and 8 are not used and no signals flow.

[Communication using the extended interface: Figure 2]
Next, communication using the extended interface will be described with reference to Fig. 2. Fig. 2 is an explanatory diagram showing communication using the extended interface.
In this remote control system, if an abnormality occurs in the inter-site line of a remote control system and communication between the remote control terminal stations becomes impossible, communication can be continued via the extended interface lines 7 and 8 and the inter-site line of another remote control system located between the same sites.

As shown in FIG. 2, for example, if an abnormality occurs in all inter-site lines (inter-site line 5 in this case) in the remote control system (2) and communication between remote control terminal station 2a and remote control terminal station 2b becomes impossible, remote control terminal station 2a transmits data addressed to remote control terminal station 2b to remote control terminal station 1a via extended interface line 71. The destination information includes information indicating the site and remote control terminal station.

The remote control terminal 1a at site A receives data addressed to remote control terminal 2b from remote control terminal 2a via the extended interface line 71, and when it recognizes that the data is addressed to site B, it transmits the data to remote control terminal 1b via the inter-site line 3 (tunneling communication).

When the remote control terminal 1b at site B receives the data via the inter-site line 3, it transmits the data to the remote control terminal 2b via the extended interface line 81.
The remote control terminal 2 b receives the data via the extended interface line 81 .

Similarly, data from remote control terminal station 2b to remote control terminal station 2a is transmitted to remote control terminal station 2a via extended interface line 82, inter-site line 3, and extended interface line 72.

As a result, even if an abnormality occurs in the inter-site line 5 of the individual remote control system (2), communication between the remote control terminal stations 2a and 2b of the individual remote control system (2) can be realized using the extended interface lines 7 and 8 and the inter-site line 3 of the individual remote control system (1). In the event of a line abnormality, it is possible to compensate with another system, improving the reliability of the entire system.

In this example, we have used a case where an abnormality occurs in the inter-site line 5 of the individual remote control system (2), but the same applies when an abnormality occurs in the inter-site line 3 of the individual remote control system (1).
Specifically, data addressed to remote control terminal station 1b from remote control terminal station 1a is received by remote control terminal station 1b via extended interface line 72, remote control terminal station 2a, inter-site line 5, remote control terminal station 2b, and extended interface line 82, and data addressed to remote control terminal station 1a from remote control terminal station 1b is received by remote control terminal station 1a via extended interface line 81, remote control terminal station 2b, inter-site line 5, remote control terminal station 2b, and extended interface line 71.

[Amount of data transmitted via tunneling]
The amount of data transmitted using an inter-site line of another remote control system will be described.
When a problem occurs in the inter-site line 5, the communication of the individual remote control system (2) is carried out by tunneling, which transmits information using the gaps in the communication of the individual remote control system (1). Therefore, it is desirable to transmit only the minimum amount of information so as not to affect the operation of the individual remote control system (1).

For example, a remote control terminal 2a, 2b that detects an abnormality in its own inter-base line may reduce the amount of data transmitted by transmitting only the results of regular monitoring at a fixed interval as equipment monitoring data, and not transmitting when a change is detected, by setting a longer interval between commands than usual, or by transmitting only important data portions extracted by commands, etc.
This allows the amount of data to be reduced compared to normal communication.

[Format of data transmitted by tunneling]
In addition, the data of the individual remote control system (2) transmitted by tunneling must be distinguishable from normal data of the individual remote control system (1).
Therefore, the data can be made identifiable as being for tunneling by, for example, setting a flag in a position different from that of normal data. The data that can be made identifiable as being for tunneling corresponds to the information indicating anomaly described in the claims.
This makes it possible for a remote control terminal station of a normal individual remote control system which receives the data to easily determine that the other party is in an abnormal state and to recognize this fact.

[Tunneling mode and emergency communication mode]
The remote control terminal stations 1a, 1b, 2a, and 2b at each base of this remote control system have, as operating modes, a normal mode that does not involve other individual remote control systems, as in the conventional case, as well as a tunneling mode and an emergency communication mode in which they operate in mutual interaction with other remote control systems.
Each of the remote control terminals 1a, 1b, 2a, and 2b monitors the state of its own inter-site lines and the data it receives, and switches to a tunneling mode or an emergency communication mode to carry out its operation.

[Tunneling mode]
The remote control terminal stations 1a, 1b, 2a, and 2b of this remote control system transition to tunneling mode when the inter-site line of its own individual remote control system (or any of them, if there are multiple) is in a normal state and the station-to-station line of another individual remote control system is received via the extended interface line 7 or 8.
In the example shown in FIG. 2, the remote control terminals 1a and 1b of the individual remote control system (1) in which the inter-site lines are operating normally are in the tunneling mode.

In this case, due to a malfunction of the inter-site line 5 of the individual remote control system (2), the remote control terminal stations 1a and 1b receive data from the remote control terminal stations 2a and 2b of the individual remote control system (2) at the same site using the extended interfaces 7 and 8, respectively, and transmit the data to another site using their own inter-site line 3.

[Display example in tunneling mode: Figure 3]
Next, a display example on an operating terminal in an individual remote control system operating in tunneling mode will be described with reference to Fig. 3. Fig. 3 is an explanatory diagram showing a display example in tunneling mode. Here, a case where the remote control terminal 1a of the individual remote control system (1) operates in tunneling mode in the state of Fig. 2 will be described as an example.

As shown in Figure 3, the operation terminal installed in the individual remote control system (1) displays the status display and operation screen of each piece of equipment in its own individual remote control system (individual remote control system (1)), as well as "Tunnel line in use," which indicates that tunneling communication is being performed by another individual remote control system (individual remote control system (2) in this case).

Furthermore, since the remote control terminals 1a and 1b receive data from the extension interface 7 or 8 even though their own lines are normal, they recognize that a line abnormality has occurred in the individual remote control system (2) and report this to the operation terminal.
As a result, the operation terminal displays "System 2 Line Abnormality" as shown in FIG.

Furthermore, the remote control terminals 1a and 1b can display the time during which tunnel communication was performed, determine the amount of data in the tunnel communication, and, together with the amount of data transmitted by the terminals themselves, display the total amount of data per second, "total data (Mbps)", or display "total data (Mbps) (tunnel (Mbps))" by adding the amount of data in the tunnel communication per second.
Furthermore, in the operation terminal in the tunneling mode, the system status of the recognized partner system (individual remote control system (2)) may be displayed on the operation screen of the own system.

[Emergency communication mode]
When the remote control terminal stations 1a, 1b, 2a, and 2b of this remote control system detect that all of the inter-site lines of its own individual remote control system are abnormal, it switches to an emergency communication mode and operates.
In the emergency communication mode, the remote control terminals 1a, 1b, 2a, and 2b use the extended interface lines to perform tunneling communication via a remote control terminal of another remote control system at the same site that has been previously set.

In this case, the remote control terminal that has entered the emergency communication mode controls the amount of data transmitted to be reduced, as described above, and transmits the data including information (such as a flag) indicating that the data is for tunneling during emergency communication.

[Display example in emergency communication mode: Figure 4]
A display example in the emergency communication mode will be described with reference to Fig. 4. Fig. 4 is an explanatory diagram showing a display example in the emergency communication mode.
The emergency communication mode is a state in which all inter-site lines of the individual remote control system are abnormal and the remote control terminal station is receiving packets via the extended interface line. In the example of Figure 2 described above, the remote control terminal stations 2a and 2b of the individual remote control system (2) are in the emergency communication mode.

For example, when the remote control terminal 2a detects that the inter-site line 5 has become abnormal, the remote control terminal 2a outputs a message to that effect to the operation terminal, and the operation terminal of site A first outputs an alarm display of "line abnormality" on the status display/operation screen of its own individual remote control system (remote control system (2)), as shown in FIG. 4.
This allows the worker operating the operation terminal to be notified that an abnormality has occurred in his/her own inter-site line 4, enabling a quick response.

As explained in FIG. 2, since the inter-site line 5 of the remote control terminal stations 2a and 2b has become abnormal, the remote control terminal stations 2a and 2b transmit and receive data via the extended interface lines 7 and 8 and the remote control terminal stations 1a and 1b at the same site.
When the remote control terminals 2a, 2b are able to normally transmit and receive data of their own individual remote control systems via the extended interface lines 7, 8 and share the status of the equipment, they recognize that the communication via the detouring route is normal and notify the operation terminal accordingly, and the operation terminal displays "emergency line normal."

If there is no response from the remote control terminal at the other end, the remote control terminals 2a and 2b determine that there is also a problem with the emergency detour route using the extended interface lines 7 and 8, and notify the operation terminal of this fact, causing the operation terminal to display "emergency line abnormality."

Furthermore, if the remote control terminal of the other party is transmitting data in a normal data format even though the own party is operating in emergency communication mode, the other party will determine that the remote control terminal does not recognize the line abnormality, and the operation terminal will display "Terminal status mismatch."
In this case, the problem may not be a line abnormality but a malfunction of the device itself.

[Detection of anomaly in a remote control terminal of another system: Figure 5]
Next, the operation of the remote control end station to detect an abnormality in a remote control end station of another system will be described with reference to Fig. 5. Fig. 5 is an explanatory diagram showing the operation when detecting an abnormality in a remote control end station of another system.
For example, as shown in FIG. 5, if the remote control terminal 2b is abnormal, data is not sent from the remote control terminal 2a even if the inter-site line 5 is normal.
Since the remote control terminal station 2a does not receive data from the remote control terminal station 2b, it determines that an abnormality has occurred in the inter-site line 5, and shifts to an emergency communication mode.

Remote control terminal station 1a receives tunneling communication data from remote control terminal station 2a via extended interface line 71, and transmits the data to remote control terminal station 1b using inter-site line 3, and the data is then transmitted to remote control terminal station 2b via remote control terminal station 1b and extended interface line 81.

However, the remote control terminal 2b is abnormal and is therefore unable to transmit a response.
The remote control terminal 1a detects that there is tunneling communication from the extended interface line 71 to the inter-site line 3, but no tunneling communication from the inter-site line 3 to the extended interface line 72, and detects the possibility of an equipment abnormality in the remote control terminal 2b.
Then, the operation terminal of the individual remote control system (1) is notified of this fact, and an alert indicating an abnormality in the device of the remote control terminal 2b can be displayed on the operation terminal.

In this way, this remote control system allows individual remote control systems to perform operations in conjunction with each other, making it possible to detect abnormalities in the equipment of the other system and respond quickly.

[Example of application of this remote control system: Figure 6]
Next, an application example of this remote control system will be described with reference to Fig. 6. Fig. 6 is an explanatory diagram showing an application example of this remote control system.
As shown in FIG. 6, an application example of this remote control system (application example system) is configured to aggregate information from individual remote control system (1) and individual remote control system (2) similar to those described above at a headquarters or the like, and to monitor the status of both individual remote control systems in an integrated manner.

In the system of the application example, the inter-site lines of the individual remote control system (1) and the individual remote control system (2) are connected to a cloud network 90, and an operation terminal 91 and a server 92 are provided at a head office or the like via the cloud network 90. The server 92 is provided with a database for storing information.

In addition, the individual remote control system (1) has remote control terminal stations 1a and 1b, and the individual remote control system (2) has remote control terminal stations 2a and 2b, and the remote control terminal stations 1a and 1b, and the remote control terminal stations 2a and 2b are connected by extended interface lines 7 and 8, respectively.
The remote control terminals 1b and 2b may be provided in a transmitting station or a base station.

The server 92 receives and stores the monitoring information of the individual remote control system (1) and the individual remote control system (2) via the cloud network 90, and makes it possible to view the monitoring data of any individual remote control system in response to a request from the operation terminal 91 or an operation terminal installed at each base, etc.
In addition, each individual remote control system can be controlled from the operation terminal 91 .
The head office system (head office cloud system) is equipped with a GUI (Graphical User Interface) to improve operability and facilitate integrated monitoring and control.

In the application example system, even if a malfunction occurs in the inter-site line of any of the individual remote control systems, information about the malfunction can be notified to the head office cloud system using the inter-site line of the normal individual remote control system and displayed on the operation terminal 91, allowing for a quicker response and early recovery of the system, thereby improving the reliability of the entire system.
That is, in the system of the application example, the abnormality detection in the separate individual remote control system described with reference to FIG. 5 can be utilized more effectively.

[Effects of the embodiment]
According to this remote control system, an individual remote control system (1) in which a remote control terminal station 1a and a remote control terminal station 1b are connected by an inter-site line 3, and an individual remote control system (2) in which a remote control terminal station 2a and a remote control terminal station 2b are connected by an inter-site line 5 are provided between the same bases. The remote control terminal station 1a and the remote control terminal station 2a in one base are connected by an extended interface line 7, and the remote control terminal station 1b and the remote control terminal station 2b in the other base are connected by an extended interface line 8. The extended interface line 7 and the extended interface line 8 are remote control systems used when the inter-site line 3 or the inter-site line 5 is abnormal. Therefore, when the inter-site line of one individual remote control system is abnormal, the communication is complemented using the inter-site line of the other individual remote control system and the extended interface lines 7 and 8, and the equipment of the individual remote control system in which the abnormality has occurred can be monitored and controlled by the operation terminal of the head office continuously via the other individual remote control system, which has the effect of improving convenience and the reliability of the entire system.

The present invention is suitable for a remote control system in which multiple individual remote control systems are set up between the same locations, and communication is mutually complementary in the event of an abnormality, allowing equipment monitoring and control to continue, improving convenience and the reliability of the entire system.

1a, 1b, 2a, 2b, 10, 10a, 10b, ... remote control terminal, 3, 5, 13, 15 ... inter-site line, 4, 14 ... HUB, 6, 16 ... modem, 7, 8, 71, 72, 81, 82 ... extended interface line, 11, 11a, 11b, 91 ... operation terminal, 12, 12a, 12b ... database, 90 ... cloud network, 92 ... server

Claims (4)

A remote control system including a remote control terminal that remotely controls a transmission device of a video signal,
a first system in which a first remote control terminal and a second remote control terminal are connected by a first communication method;
a second system in which a third remote control terminal and a fourth remote control terminal are connected by a second communication method;
the first remote control terminal and the third remote control terminal are connected by a third communication method;
the second remote control terminal and the fourth remote control terminal are connected by a fourth communication method;
the third communication method and the fourth communication method are used when the first communication method or the second communication method is abnormal;
A remote control system characterized in that when the first remote control terminal receives data addressed to the fourth remote control terminal from the third remote control terminal via the third communication method, but does not receive data addressed to the third remote control terminal from the second remote control terminal via the first communication method, it determines that an abnormality has occurred in the fourth remote control terminal . When the second communication method becomes abnormal,
a third remote control terminal transmits data addressed to a fourth remote control terminal to a first remote control terminal using a third communication method, the first remote control terminal transmits the data to a second remote control terminal using a first communication method, and the second remote control terminal transmits the data to the fourth remote control terminal via a fourth communication method;
A remote control system as described in claim 1, characterized in that the fourth remote control terminal transmits data addressed to the third remote control terminal to the second remote control terminal via the fourth communication method, the second remote control terminal transmits the data to the first remote control terminal via the first communication method, and the first remote control terminal transmits the data to the third remote control terminal via the third communication method. The remote control system according to claim 1 or 2, characterized in that when the remote control terminal uses the third communication method or the fourth communication method, the transmission data includes information indicating an abnormality, and transmits a smaller amount of data than normal. A monitoring terminal connected to the first or second communication method,
4. The remote control system according to claim 1 , wherein, when an abnormality occurs in any of the remote control terminals or in any of the communication systems, the abnormality is displayed on a monitoring terminal.