JP2022185517A - Radio relay system, flight body, management device, management method, and program - Google Patents

Abstract

To securely and quickly stop transmission of a radio wave from a radio relay device of a flight body when an anchoring wire is cut by any cause.SOLUTION: A radio relay system including a radio relay device 20 mounted on a flight body 60 that flies while being anchored by an anchoring wire 95 extending from the ground or the sea toward the sky, comprises: a tension detection unit 620 for detecting tension of the anchoring wire 95; and means 630 for stopping transmission of a radio wave from the radio relay device 20 when a detection result of the tension detection unit 620 satisfies a predetermined radio wave transmission stop condition.SELECTED DRAWING: Figure 2

Description

The present invention relates to a radio relay system, an aircraft, a management device, a management method and a program.

Conventionally, a wire-powered drone wireless relay system is known as this type of wireless relay system (see, for example, Non-Patent Document 1). In the wired power supply drone wireless relay system, a wireless relay device (relay station) is mounted on a drone (unmanned aerial vehicle) that can hover in the sky, and power is supplied to the ground via a power supply line that is regarded as a mooring line. Power is supplied from the device to the wireless relay device.

“Successful demonstration experiment of wired power supply drone wireless relay system”, [online], July 9, 2020, SoftBank Corp., news, press release 2020, [searched December 24, 2020], Internet <URL: https://www.softbank.jp/corp/news/press/sbkk/2020/20200709_01/>

A radio relay system in which a radio repeater is mounted on an aircraft that is moored by a mooring line that extends from the ground or sea into the sky is designed to stop transmitting radio waves when the mooring line is cut for some reason. Operation is permitted as a condition. Therefore, when the mooring line is cut for some reason, it is required to reliably and quickly stop the transmission of radio waves from the radio relay device of the flying object.

A radio relay system according to an aspect of the present invention is a radio relay system in which a radio relay device is mounted on an aircraft that flies while being moored by a mooring line extending from the ground or sea to the sky, wherein the mooring line A tension detection unit for detecting tension, and means for stopping transmission of radio waves from the wireless relay device when a detection result of the tension detection unit satisfies a predetermined condition for stopping radio wave transmission.
In the wireless relay system, the predetermined radio wave transmission stop condition may include a condition that the tension detected by the tension detector is below a predetermined value.
Further, in the wireless relay system, the means transmits a transmission control signal for stopping transmission of radio waves from the wireless relay device when the detection result of the tension detection unit satisfies a predetermined condition for stopping radio wave transmission. It may have a transmission control unit that transmits to the wireless relay device.
Further, in the radio relay system, the tension detection section and the transmission control section may be mounted on the aircraft.
Further, the wireless relay system may include a management device capable of wirelessly communicating with the flying object, and the tension detection section and the transmission control section may be mounted on the management device.

A flying object according to another aspect of the present invention is a flying object equipped with a wireless relay device and moored by a mooring line extending from the ground or the sea to the sky, wherein the tension of the mooring line is detected. and means for stopping transmission of radio waves from the wireless relay device when a detection result of the tension detection section satisfies a predetermined condition for stopping radio wave transmission.

A management device according to still another aspect of the present invention is a management device capable of wireless communication with an aircraft equipped with a wireless relay device that flies while being moored by a mooring line extending from the ground or sea to the sky. a tension detection unit for detecting the tension of the mooring line; and when the detection result of the tension detection unit satisfies a predetermined condition for stopping radio wave transmission, a transmission control signal is transmitted to the flying object, and the radio relay is performed. and means for stopping transmission of radio waves from the device.

A management method according to still another aspect of the present invention is a management method for a radio relay system in which a radio relay device is mounted on an aircraft that flies while being moored by a mooring line extending from the ground or sea to the sky, detecting the tension of the mooring line by a tension detection unit; and stopping transmission of radio waves from the wireless relay device when the detection result of the tension detection unit satisfies a predetermined condition for stopping radio wave transmission. include.

A program according to still another aspect of the present invention is a program for operating a computer of an aircraft equipped with a wireless relay device and moored by a mooring line extending from the ground or sea to the sky and flying, wherein the mooring line When the detection result of the tension detection unit that detects the tension of the wire satisfies a predetermined condition for stopping radio wave transmission, the computer functions as a means for stopping the transmission of radio waves from the wireless relay device.
Further, a program according to still another aspect of the present invention is a management device capable of wireless communication with an aircraft equipped with a wireless relay device that flies while moored by a mooring line extending from the ground or sea to the sky. wherein, when the detection result of the tension detection unit that detects the tension of the mooring line satisfies a predetermined condition for stopping radio wave transmission, a transmission control signal is transmitted to the flying object to cause the wireless relay The computer functions as means for stopping the transmission of radio waves from the device.

According to the present invention, when the mooring line is cut for some reason, it is possible to reliably and quickly stop the transmission of radio waves from the wireless relay device of the aircraft.

1 is an explanatory diagram showing an example of an overall configuration of a communication system including a drone radio relay system according to an embodiment; FIG. FIG. 2 is a block diagram showing a main configuration of an electrical component of a drone in the drone wireless relay system according to configuration example 1; FIG. 11 is a block diagram showing the main configuration of an electrical component of the drone in the drone wireless relay system according to configuration example 2; FIG. 11 is a block diagram showing the configuration of main parts of an electrical unit and a mooring device of a drone in the drone wireless relay system according to configuration example 3;

Embodiments of the present invention will be described below with reference to the drawings.
The system according to the embodiment described in this document is a wireless communication system in which a wireless communication device (communication relay station) is mounted on a flying object such as a drone (unmanned aerial vehicle) moored to a mooring device as a management device on the ground or at sea. It is a relay system. Such a radio relay system can be used, for example, when performing radio relay to an area outside the service area of a fixed base station at the time of a disaster or when searching for victims in mountains, forests, or the like. In particular, the wireless relay system of this embodiment is a drone wireless relay system that can reliably and quickly stop transmission of radio waves from the wireless relay device when the mooring line is cut for some reason.

FIG. 1 is an explanatory diagram showing an example of the overall configuration of a communication system including a drone radio relay system according to one embodiment of the present invention.
The drone wireless relay system of this embodiment may include a mooring device 90 and a mooring line 95 in addition to the slave unit 20 mounted on the drone 60 , and may also include the master unit 10 .

In FIG. 1, the drone wireless relay system according to the present embodiment includes a relay source wireless relay device (hereinafter referred to as “master device”) 10 located on the ground and a relay destination wireless relay device (hereinafter referred to as “child device”) located in the sky. ) 20. Base unit 10 and slave unit 20 are fixed base stations (hereinafter referred to as “base stations”) 30 such as eNodeB and gNodeB connected to the core network of mobile communication network 80 of a communication operator (communications carrier), and a communication operator. relays downlink and uplink wireless communications with mobile stations 40 as single or multiple terminal devices (user devices) located within the wireless relay area (cell 200A of handset 20).

Note that a plurality of downlink radio signals with different frequencies used by the same communication operator may be relayed, and a plurality of uplink radio signals with different frequencies used by the same communication operator may be relayed. . Further, the radio relay system of the present embodiment relays a plurality of radio signals of downlinks with different frequencies used by a plurality of communication operators, and relays a plurality of radio signals of uplinks with different frequencies used by the plurality of communication operators. Multiple radio signals may be relayed.

The mobile communication network 80 may be provided with a remote control device 81 (remote control source). The remote control device 81 can hold, for example, information about the master device 10 and the slave device 20 and transmit control information to at least one of the master device 10 and the slave device 20 . Further, remote control device 81 may function as an information transmission destination and receive information from at least one of parent device 10 and child device 20 . Note that the remote control device 81 may be provided outside the mobile communication network 80 as long as it can communicate with the parent device 10 and the child device 20 .

The mobile communication network 80 may be provided with a remote drone control device that remotely controls a drone 60 as a flying object on which the slave device 20 is mounted.

The remote control device 81 may be, for example, a server, a PC, or a tablet terminal capable of communicating with the slave device 20 via the master device 10 . Also, the remote drone control device may be a server, PC, or tablet terminal that can communicate with the control system of the drone 60 via the master device 10, for example.

Base unit 10 communicates with base station 30 via antenna 101 having directivity directed toward antenna 31 of base station 30 (antenna for base station) to relay target frequency (base station side frequency) f0d ( (downlink signal) and f0u (uplink signal) radio signals are transmitted and received. In addition, master device 10 transmits f1d (downlink signal) and f1u (uplink signal) of relay frequencies via antenna (antenna for slave device) 102 having directivity toward antenna 201 of slave device 20. Send and receive signals. Base unit 10 transmits and receives radio signals of f0d (downlink signal) and f0u (uplink signal) to and from base station 30, and repeater frequency f1d (downlink signal) and f0u (uplink signal) to and from handset 20. It has a frequency conversion function for converting f1u (uplink signal) radio signals.

Master device 10 can be moved to a target position on the ground by being mounted on automobile 50, which is a vehicle as a mobile object. Automobile 50 may be an electric vehicle, a hybrid vehicle, a fuel cell vehicle, or the like, which is equipped with a spare battery, a generator, or the like capable of supplying power to base device 10 for a long period of time. The automobile 50 may include a take-off/landing unit from which the drone 60 can take off and land. Further, the configuration example of FIG. 1 is an example in which the master device 10 is incorporated in an automobile 50, but the moving body in which the master device 10 is incorporated is a vehicle other than an automobile that travels on a road, or a vehicle that travels on a railroad track. It may be a railroad vehicle, an aircraft, or a ship on a river or sea.

Handset 20 transmits radio signals of f1d (downlink signal) and f1u (uplink signal) of relay frequencies via antenna (antenna for base unit) 201 having directivity toward antenna 102 of base unit 10. Send and receive. In addition, handset 20 transmits and receives radio signals of f0d (downlink signal) and f0u (uplink signal) of relay target frequency (mobile station side frequency) via antenna 202 for the mobile station. Handset 20 transmits and receives radio signals of relay frequencies f1d (downlink signal) and f1u (uplink signal) to and from base unit 10, and f0d (downlink signal) and f0d (downlink signal) to and from mobile station 40. It has a frequency conversion function that converts f0u (uplink signal) radio signals.

Note that the communication between the parent device 10 and the child device 20 may be performed by ROF (Radio on Fiber) using optical fiber.

The child device 20 is mounted on a drone 60 that can move in the sky by autonomous control or by external control. A drone 60 equipped with a slave device 20 is transported to a target position on the ground by an automobile (radio relay vehicle) 50 and controlled to stay above the ground at a predetermined altitude (eg, 100 to 150 m).

In the wireless relay system of the present embodiment, the drone flight driving unit including the cordless handset 20 that is the wireless relay device of the relay destination, the motor that drives the propeller of the drone 60 and its control device (flight controller), etc. includes the drone 60 Power is supplied from the battery installed in the

However, the power may be supplied from the mooring device 90 via the mooring line 95 . In this case, by supplying power to the flight drive unit of the drone 60 via the mooring line 95, the slave unit 20 can be kept in the sky for a long time, and the length of the slave unit 20, which is the core of the wireless relay system, can be increased. Time can be managed. Even in this case, if the mooring line 95 is cut for some reason, the drone flight driving section can be powered by the spare battery built into the radio relay system, allowing the drone 60 to land safely. Operation can be stopped safely. Note that the mooring device 90 in this case may be mounted on a ground automobile 50 or a sea vessel equipped with a battery and a generator.

[Configuration example 1]
FIG. 2 is a block diagram showing an example of the main configuration of the electrical unit 600 of the drone 60 in the drone wireless relay system according to the embodiment (this example is hereinafter referred to as “configuration example 1”).
In FIG. 2 , the electrical unit 600 of the drone 60 according to Configuration Example 1 includes a slave unit 20, a drone flight driving unit 610, a tension sensor 620 as a tension detection unit, a control unit 630 as a transmission control unit, a battery 650;

The drone flight drive unit 610 receives power from the battery 650 and causes the drone 60 to fly. The tension sensor 620 detects the tension of the mooring wire 95 and sends the detection result to the control section 630 . The control unit 630 receives power from the battery 650 and controls the entire drone 60 . The battery 650 supplies electric power to each component such as the child device 20 on the drone 60, the drone flight driving section 610, the control section 630, and the like.

When the tension (detection result) detected by the tension sensor 620 satisfies a predetermined condition for stopping radio wave transmission, the control unit 630 of this configuration example 1 sends a transmission OFF signal ( transmission control signal) to the transmission ON/OFF control terminal of the child device 20 . Upon receiving this transmission OFF signal, the handset 20 stops transmitting radio waves.

As a predetermined radio wave transmission stop condition, for example, there is a condition that the tension detected by the tension sensor 620 is below a predetermined value. If the mooring line 95 is not cut, a corresponding tension is acting on the mooring line 95. Therefore, when the tension sensor 620 detects a tension equal to or greater than a predetermined value, the mooring line 95 is cut. In this state, the tension acting on the mooring wire 95 is reduced, and the tension sensor 620 detects tension below a predetermined value. Therefore, by satisfying this condition, it is possible to reliably grasp that the mooring line 95 has been severed.

Note that the predetermined radio wave transmission stop condition is not limited to the above condition, and may be any condition under which it can be determined that the mooring wire 95 has been severed based on the tension detected by the tension sensor 620 . Therefore, for example, the condition may be that the tension detected by the tension sensor 620 is below a predetermined value for a predetermined period of time. Under this condition, even if the tension sensor 620 temporarily detects a low tension lower than a predetermined value for some reason while the mooring line 95 is not cut, it is possible to erroneously detect that the mooring line 95 has been cut. can be avoided.

Further, the predetermined radio wave transmission stop condition may be, for example, a condition for determining that the mooring wire 95 has been severed when the change in tension detected by the tension sensor 620 indicates a change over time. When the mooring wire 95 is cut (teared off), a large tension temporarily acts on the mooring wire 95, and then the tension of the mooring wire 95 greatly decreases. According to the above conditions, it is possible to determine that the mooring line 95 has been severed from such a change over time, so that it is possible to reliably grasp that the mooring line 95 has been severed.

Note that the predetermined radio wave transmission stop condition may be a condition combining a plurality of conditions.

Further, when the tension (detection result) detected by the tension sensor 620 satisfies a predetermined radio wave transmission stop condition, the control unit 630 causes the drone 60 to fly to a predetermined landing point (for example, the departure and arrival part of the automobile 50). Also, a descent/landing signal (go home signal) may be sent to the drone flight drive unit 610 . In this case, when the drone flight drive unit 610 receives this descent/landing signal, it executes a predetermined descent/landing program, and autonomously heads toward a predetermined landing point (for example, the take-off/landing part of the automobile 50). Start moving, descend and land.

As described above, the drone wireless relay system of Configuration Example 1 uses the tension sensor 620 to detect the tension of the mooring wire 95, which changes reliably and immediately when the mooring wire 95 is cut. Based on the result, transmission of radio waves from handset 20 is stopped. That is, in the configuration example 1, it is determined whether or not the mooring line 95 has been cut based on the parameter of the tension of the mooring line 95 which surely changes when the mooring line 95 is cut. Therefore, compared to a configuration that determines whether or not the mooring line 95 has been cut based on parameters other than the tension of the mooring line 95, when the mooring line 95 is cut, radio waves are reliably and quickly transmitted from the handset 20. can be stopped.

In addition, the handset 20 is provided with a function (transmission ON/OFF control terminal) capable of executing transmission ON/OFF control from the outside as one of commonly provided control and monitoring functions. In this configuration example 1, the system configuration is simple because the existing transmission ON/OFF control function can be used.

[Configuration example 2]
FIG. 3 is a block diagram showing another example of the main configuration of the electrical unit 600 of the drone 60 in the wireless relay system according to this embodiment (this example is hereinafter referred to as “configuration example 2”).
The wireless relay system according to Configuration Example 2 is a wired power supply type drone wireless relay in which a mooring device on the ground or on the sea is also used as a ground power supply device, and power is supplied to the flying object through a power supply line that is regarded as a mooring line. System. The wired power supply type drone wireless relay system can realize a reduction in the size and weight of the drone 60 compared to a configuration in which power is supplied from a battery mounted on the drone 60 as in configuration example 1 described above.

In FIG. 3, the electrical unit 600 of the drone 60 according to Configuration Example 2 includes a slave unit 20, a drone flight driving unit 610, a tension sensor 620, and a control unit 630, as in the configuration of FIG. It should be noted that configuration example 2 includes a power supply device 660 , a spare battery 670 , and a switch 680 instead of the battery 650 . Furthermore, the electrical unit 600 of the drone 60 includes a power supply path 663 for supplying power from the power supply device 660 to the slave unit 20, the drone flight drive unit 610, the tension sensor 620, and the control unit 630, and a voltage detection device 690. .

In configuration example 2, power is supplied to the power supply device 660 from a mooring device (ground power feeding device) 90 via a mooring line (power feeding line) 95 . A voltage detection device 690 and a switch 680 are provided between the power supply device 660 and the power supply target (child device 20, drone flight drive section 610, tension sensor 620 and control section 630). When the voltage detection device 690 detects that the output of the power supply device 660 has stopped or decreased, the voltage detection device 690 determines that an abnormality has occurred in the power supply, and stops the power supply from the power supply device 660 to the power supply object from the spare battery 670. A switching control signal for switching to power supply to the target is generated and output to the switch 680 .

Based on the switching control signal from the voltage detection device 690, the switch 680 switches the power supply from the power supply device 660 to the power supply target from the spare battery 670 to the power supply target. At this time, the drone flight drive unit 610 is supplied with power from the spare battery 670, so the drone 60 continues to fly. Further, since power is also supplied from the spare battery 670 to the child device 20, transmission of radio waves from the child device 20 is also continued. Therefore, even if an abnormality occurs in the power supply due to the disconnection of the mooring line (power supply line) 95, the drone 60 can continue flying as it is, and the transmission of radio waves from the slave unit 20 is also possible. It is possible to continue.

Here, as described above, a radio relay system in which a radio relay device is mounted on an aircraft that is moored by a mooring line extending from the ground or sea to the sky and flies does not transmit radio waves when the mooring line is cut. Operation is permitted on the condition that it is stopped. Therefore, when the mooring line is cut, it is required to reliably and quickly stop the transmission of radio waves from the radio relay device of the flying object.

Since the voltage detection device 690 can detect the stoppage or decrease of the output of the power supply device 660, it can detect that the mooring line (power supply line) 95 has been disconnected and that an abnormality has occurred in the power supply. It is possible. Therefore, when the voltage detection device 690 detects a stop or drop in the output of the power supply device 660, and outputs the detection signal (power stop signal or voltage drop signal) to the control unit 630, the control unit 630 causes the child device 20 to It is possible to stop the transmission of radio waves from

However, the cause of the output abnormality of the power supply device 660 is not limited to the disconnection of the mooring line (feeder line) 95 . Therefore, even when the output abnormality of the power supply device 660 occurs although the mooring line (power supply line) 95 is not cut, the detection signal (power supply stop signal or voltage drop signal) is output to the control unit 630. As a result, the control unit 630 may stop the transmission of radio waves from the child device 20 .

On the other hand, in configuration example 2, as in configuration example 1 described above, a tension sensor 620 that detects the tension of the mooring line (feeder line) 95 is provided. Sent. Then, when the tension (detection result) detected by the tension sensor 620 satisfies a predetermined condition for stopping radio wave transmission, the control unit 630 outputs a transmission OFF signal (a transmission control signal) for stopping the transmission of radio waves from the slave device 20. ) to the transmission ON/OFF control terminal of the child device 20 . As a result, the handset 20 that has received the transmission OFF signal stops transmitting radio waves.

As described above, in the configuration example 2, as in the configuration example 1 described above, the tension of the mooring line (feeding line) 95, which reliably changes when the mooring line (feeding line) 95 is cut, is set to the parameter of tension. Based on this, it is determined whether or not the mooring line (feeder line) 95 has been cut. Therefore, compared to a configuration that determines whether the mooring line (feeding line) 95 has been cut based on parameters other than the tension of the mooring line (feeding line) 95, when the mooring line (feeding line) 95 is cut, Transmission of radio waves from the slave device 20 can be stopped reliably and quickly.

In particular, in a wired power supply type drone wireless relay system in which power is supplied to the flying object via a power supply line regarded as a mooring line, as in Configuration Example 2, the detection result of the voltage detection device 690 is used to detect the mooring line. It is possible to determine whether the mooring line (feeder line) 95 has been cut more reliably and immediately than in the case of determining that the (feeder line) 95 has been cut.

In Configuration Example 2, the detection result of the voltage detection device 690 may also be used as the predetermined radio wave transmission stop condition. That is, the control unit 630 also receives the detection result from the voltage detection device 690, and together with the detection result of the tension sensor 620, determines whether or not the mooring line (power supply line) 95 is finally cut. good.

Also, in this configuration example 2, the system configuration is simple because the existing transmission ON/OFF control function can be used. In addition, even if the mooring line (feeding line) 95 is cut, since the power supply to the child device 20 is continued by the spare battery 670, even if the mooring line (feeding line) 95 is cut, the normal operation of the child device 20 Since it is the same as the transmission ON/OFF control of , it is possible to avoid device failure of the child device 20 .

[Configuration example 3]
FIG. 4 shows still another example of the main configuration of the electrical unit 600 of the drone 60 and the mooring device 90 as the management device in the wireless relay system according to the present embodiment (this example is hereinafter referred to as “configuration example 3”). 2 is a block diagram showing .
In FIG. 4, the electrical unit 600 of the drone 60 according to Configuration Example 3 includes a slave unit 20, a drone flight driving unit 610, a control unit 630, and a battery 650, as in the configuration of FIG. A tension sensor 620 is not provided. In addition, the electrical unit 600 of the drone 60 in Configuration Example 3 includes a wireless communication device (for example, a mobile communication module, which is a terminal device of a mobile communication system) 640 as a receiver.

The wireless communication device 640 transmits a transmission stop signal (transmission control signal) for stopping transmission of radio waves from the handset 20 from the mooring device 90 to which the mooring line 95 is connected, for example, via wireless communication of a mobile communication system. receive. When the control unit 630 receives the transmission stop signal from the wireless communication device 640 from the mooring device 90 that has detected the disconnection of the mooring line 95, the control unit 630 generates a transmission OFF signal for stopping the transmission of radio waves from the handset 20. output to the slave unit 20. Child device 20 stops transmission of radio waves from child device 20 based on the transmission control signal from control unit 630 .

The mooring device 90 includes a tension sensor 910 as a tension detector, a controller 920 as a transmission controller, and a wireless communication device (for example, a mobile communication module) 930 as a transmitter. The tension sensor 910 detects the tension of the mooring wire 95 and sends the detection result to the control section 920 . The control unit 920 controls the entire mooring device 90 .

When the tension (detection result) detected by the tension sensor 910 satisfies a predetermined condition for stopping radio wave transmission, the control unit 920 of Configuration Example 3 provides a transmission stop signal ( transmission control signal) to the wireless communication device 930 . The wireless communication device 930 transmits the transmission stop signal received from the control unit 920 to the wireless communication device 640 provided in the electrical unit 600 of the drone 60 via wireless communication of the mobile communication system, for example.

As described above, in the configuration example 3, as in the configuration examples 1 and 2 described above, the tension of the mooring line (feeder line) 95, which reliably changes when the mooring line 95 is cut, is a parameter. Based on this, it is determined whether the mooring line 95 has been severed. Therefore, compared to a configuration that determines whether or not the mooring line 95 has been cut based on parameters other than the tension of the mooring line 95, when the mooring line 95 is cut, radio waves are reliably and quickly transmitted from the handset 20. can be stopped.

Further, in the configuration example 3, since the tension sensor 910 provided in the mooring device 90 detects the tension of the mooring wire 95 , the drone 60 does not need to be equipped with the tension sensor 910 . Therefore, the size and weight of the drone 60 can be reduced.

Note that this configuration example 3 can also be provided to a wired power supply type drone wireless relay system in which power is supplied to the flying object via a power supply line regarded as the mooring line 95, as in the configuration example 2 described above.
Also, in this configuration example 3, the system configuration is simple because the existing transmission ON/OFF control function can be used.

In the above-described embodiments, the example in which the tension sensor 620 is mounted on the drone 60 (configuration examples 1 and 2) and the example in which the tension sensor 910 is provided in the mooring device 90 (configuration example 3) have been described. It is not limited to this. For example, the mooring wire 95 may be provided with a tension sensor as a tension detector.

Further, according to the present embodiment, the radio repeater system is a repeater type, and the handset 20 performs processing specific to the base stations (eNodeB, gNodeB) such as baseband signal encoding and decoding into baseband signals. Since there is no need to do this, the device configuration of the child device 20 becomes simple and lightweight.

It should be noted that the process steps and components of communication systems, including wireless relay systems, described herein may be implemented by various means. For example, these processes and components may be implemented in hardware, firmware, software, or any combination thereof.

For hardware implementation, means such as processing units used to implement the steps and components in an entity (e.g., various wireless communication devices, Node Bs, terminals, hard disk drives, or optical disk drives) are: One or more of an application specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processor (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor , controllers, microcontrollers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, computers, or combinations thereof.

Also, for firmware and/or software implementations, means such as processing units used to implement said components may be programs (e.g. procedures, functions, modules, instructions) that perform the functions described herein. , etc.). In general, any computer/processor readable medium tangibly embodying firmware and/or software code means, such as a processing unit, used to implement the steps and components described herein. may be used to implement For example, firmware and/or software code may be stored in memory and executed by a computer or processor, such as in a controller. The memory may be implemented within the computer or processor, or external to the processor. The firmware and/or software code may also be, for example, random access memory (RAM), read only memory (ROM), non-volatile random access memory (NVRAM), programmable read only memory (PROM), electrically erasable PROM (EEPROM). ), flash memory, floppy disk, compact disk (CD), digital versatile disk (DVD), magnetic or optical data storage devices, etc. good. The code may be executed by one or more computers or processors and may cause the computers or processors to perform certain aspects of the functionality described herein.

Also, the medium may be a non-temporary recording medium. Also, the code of the program is not limited to a specific format as long as it can be read and executed by a computer, processor, or other device or machine. For example, the program code may be source code, object code, or binary code, or may be a mixture of two or more of these codes.

Moreover, the description of the embodiments disclosed herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to other variations without departing from the spirit or scope of this disclosure. This disclosure, therefore, is not to be limited to the examples and designs described herein, but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

10: Parent device 20: Child device 30: Base station 40: Mobile station 50: Car 60: Drone 80: Mobile communication network 81: Remote control device 90: Mooring device 95: Mooring line 600: Electrical unit 610: Drone flight driving unit 620: tension sensor 630: control unit 640: wireless communication device 650: battery 660: power supply device 663: power supply path 670: spare battery 680: switch 690: voltage detection device 910: tension sensor 920: control unit 930: wireless communication device

Claims (10)

A radio relay system in which a radio relay device is mounted on an aircraft that flies while being moored by a mooring line extending from the ground or sea to the sky,
a tension detection unit that detects the tension of the mooring line;
and means for stopping the transmission of radio waves from the radio relay device when the detection result of the tension detection unit satisfies a predetermined radio wave transmission stop condition. In the radio relay system according to claim 1,
The radio relay system, wherein the predetermined condition for stopping radio wave transmission includes a condition that the tension detected by the tension detector is below a predetermined value. In the radio relay system according to claim 1 or 2,
The means performs transmission control for transmitting a transmission control signal for stopping transmission of radio waves from the radio relay device to the radio relay device when the detection result of the tension detection unit satisfies a predetermined radio wave transmission stop condition. A radio relay system characterized by having a section. In the radio relay system according to claim 3,
A wireless relay system, wherein the tension detector and the transmission controller are mounted on the aircraft. In the radio relay system according to claim 3,
A management device capable of wireless communication with the flying object,
The wireless relay system, wherein the tension detection unit and the transmission control unit are mounted on the management device. An aircraft equipped with a radio relay device and moored by a mooring line extending from the ground or sea to the sky,
a tension detection unit that detects the tension of the mooring line;
means for stopping the transmission of radio waves from the wireless relay device when the detection result of the tension detection unit satisfies a predetermined radio wave transmission stop condition. A management device capable of wireless communication with a flying object equipped with a wireless relay device that flies while being moored by a mooring line extending from the ground or sea to the sky,
a tension detection unit that detects the tension of the mooring line;
means for transmitting a transmission control signal to the flying object to stop transmission of radio waves from the wireless relay device when the detection result of the tension detection unit satisfies a predetermined condition for stopping radio wave transmission. A management device characterized by: A management method for a radio relay system in which a radio relay device is mounted on an aircraft moored by a mooring line extending from the ground or sea to the sky, comprising:
detecting the tension of the mooring line by a tension detector;
and stopping the transmission of radio waves from the wireless relay device when the detection result of the tension detection unit satisfies a predetermined radio wave transmission stop condition. A program for operating a computer of an aircraft equipped with a radio relay device and moored by a mooring line extending from the ground or sea to the sky,
The computer is caused to function as means for stopping transmission of radio waves from the wireless relay device when a detection result of a tension detection unit that detects the tension of the mooring line satisfies a predetermined condition for stopping radio wave transmission. program to do. A program for operating a computer of a management device capable of wireless communication with an aircraft equipped with a wireless relay device that flies while being moored by a mooring line extending from the ground or sea to the sky,
Means for transmitting a transmission control signal to the flying object to stop transmission of radio waves from the wireless relay device when the detection result of the tension detection unit for detecting the tension of the mooring line satisfies a predetermined condition for stopping radio wave transmission. A program characterized by causing the computer to function as

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