Emergency communication system and emergency communication method based on multi-platform multi-network convergence

Abstract

The invention provides an emergency communication system and an emergency communication method based on multi-platform and multi-network convergence. The system comprises a first unmanned aerial vehicle platform, a second unmanned aerial vehicle platform, a satellite gateway station and a ground optical fiber, a first communication link is established between a ground satellite portable station and a satellite gateway station in the first unmanned aerial vehicle platform, and narrow-band ad hoc network equipment, broadband ad hoc network equipment and airborne satellite communication equipment are integrated on the second unmanned aerial vehicle platform; the airborne satellite equipment establishes a second communication link with the satellite gateway station; the fusion commanding and dispatching module switches the communication network when network switching conditions are met, and the network switching conditions comprise that the second unmanned aerial vehicle is not in the measurement and control range or the distance between the second unmanned aerial vehicle and the measurement and control link equipment exceeds the maximum communication distance of the current network equipment and the communication quality of the current network equipment does not meet the requirement; according to the invention, data link control and flexible link switching are provided for scenes within the visual range and beyond the visual range, the satellite bandwidth is saved, the communication link pressure is reduced, and the emergency rescue cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of emergency communication technology, and in particular to an emergency communication system and an emergency communication method based on multi-platform and multi-network integration. Background Art

[0002] Natural disasters such as earthquakes and floods are often accompanied by extreme situations such as power outages, network outages, and circuit breakages. Communications are greatly restricted, and the disaster situation cannot be effectively assessed and analyzed, which increases the risk of rescue and delays the timeliness of rescue. It is an urgent problem to quickly establish a reliable communication network system to achieve communication between rescue personnel, the command center, or the affected people. Traditional emergency communication systems use drones as the basis for communication, but drones have limited load capacity, small installation space, and are prone to interference during flight. During flight, changes in the heading of the drone will also cause changes in communication quality, increase bit errors and image distortion. When some emergency communication systems are flying beyond visual range, the collected video images and measurement and control links need to be provided by airborne satellite communications, but multi-channel video transmission can easily cause bandwidth pressure and affect signal transmission quality. Summary of the invention

[0003] The present invention provides an emergency communication system and an emergency communication method based on multi-platform and multi-network integration, so as to solve the defects in the traditional emergency communication system that unmanned aerial vehicles are easily disturbed during flight, the change of heading causes the change of communication quality, the change of aircraft coverage area affects the communication quality, and the multi-channel video transmission at beyond visual range easily causes bandwidth pressure and affects the signal transmission quality.

[0004] The present invention provides an emergency communication system based on multi-platform and multi-network integration, comprising: The first UAV platform, the second UAV platform, the satellite gateway station and the ground optical fiber; The first drone platform is based on the first drone, and integrates a public network base station device and a ground satellite portable station. The ground satellite portable station establishes a first communication link with the satellite gateway station. The first communication link is connected to the operator core network through the ground optical fiber. The first drone is connected to the public network base station device to provide public network services. The second UAV platform is based on the second UAV and integrates narrowband ad hoc networking equipment, broadband ad hoc networking equipment, airborne satellite communication equipment, measurement and control link equipment and a fusion command and dispatch module; The airborne satellite device establishes a second communication link with the satellite gateway station, and the second communication link is connected to the emergency command center network through the ground optical fiber; the narrowband ad hoc network device and the broadband ad hoc network device are used to interconnect various ground nodes in the mission area; the integrated command and dispatch module is used to switch the communication network when the network switching condition is met, and the network switching condition includes at least one of the following: The second UAV is not within the measurement and control range of the measurement and control link device; The distance between the second UAV and the measurement and control link device exceeds the maximum communication distance of the current network device; The current network device communication quality between the second UAV and the measurement and control link device does not meet the first preset requirement.

[0005] According to the emergency communication system based on multi-platform and multi-network integration provided by the present invention, the narrowband self-organizing network device includes: a narrowband self-organizing network host and a narrowband antenna. By configuring a narrowband communication channel, the narrowband self-organizing network host and the intercom device perform voice communication through the narrowband antenna.

[0006] According to the emergency communication system based on multi-platform and multi-network integration provided by the present invention, the broadband self-organizing network device includes: a broadband self-organizing network host and a broadband antenna. By constructing a broadband communication channel within a preset range, the broadband self-organizing network host conducts video communication with the wearable terminal device through the broadband antenna.

[0007] According to the emergency communication system based on multi-platform and multi-network integration provided by the present invention, the airborne satellite communication equipment integrates a modem, an antenna, a radio frequency, a frequency conversion, an inertial navigation and an antenna control unit.

[0008] The present invention also provides a multi-platform multi-network integrated emergency communication method, which is applied to the multi-platform multi-network integrated emergency communication system as described in any one of the above, comprising: Based on the first unmanned aerial vehicle, a public network base station device and a ground satellite portable station are integrated, the ground satellite portable station establishes a first communication link with the satellite gateway station, and a public network service is provided through the first communication link; Based on the second UAV, a narrowband ad hoc network device, a broadband ad hoc network device, and an airborne satellite communication device are integrated. The airborne satellite device establishes a second communication link with the satellite gateway station. The narrowband ad hoc network device or the broadband ad hoc network device provides an emergency network through the second communication link, and switches the communication network when a network switching condition is met. The network switching condition includes at least one of the following: The second UAV is not within the measurement and control range of the measurement and control link device; The distance between the second UAV and the measurement and control link device exceeds the maximum communication distance of the current network device; The current network device communication quality between the second UAV and the measurement and control link device does not meet the first preset requirement.

[0009] The multi-platform and multi-network integrated emergency communication method provided by the present invention also includes: When the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the measurement and control link device, and the maximum communication distance of the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, the video image is transmitted by the broadband self-organizing network device; the video image is transmitted to the wearable terminal device through the multi-hop technology of the broadband self-organizing network; the measurement and control position and distance and other information of the second UAV are provided by the measurement and control link device.

[0010] The multi-platform and multi-network integrated emergency communication method provided by the present invention also includes: When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the measurement and control link device, and the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, the video image is transmitted by the broadband self-organizing network device; the video image is transmitted to the wearable terminal device through the multi-hop technology of the broadband self-organizing network; the measurement and control information of the second UAV is transmitted by the measurement and control link, and the measurement and control link is established by a point-to-point connection between the airborne satellite equipment and the ground satellite portable station through the double-hop technology under the same beam coverage of the satellite.

[0011] The multi-platform and multi-network integrated emergency communication method provided by the present invention also includes: When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the measurement and control link device, and the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, but the broadband self-organizing network transmission quality does not meet the preset requirements, the video image and the measurement and control information of the UAV are transmitted by the measurement and control link, and the measurement and control link is established by the airborne satellite device and the ground satellite portable station through a point-to-point connection using a double-hop technology under the same satellite beam coverage; the airborne satellite device transmits the video image to the ground portable station, the ground portable station transmits the video image between the broadband self-organizing network devices, and the video image is passed to the wearable terminal device through the ground broadband networking multi-hop technology.

[0012] The multi-platform and multi-network integrated emergency communication method provided by the present invention also includes: When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the broadband self-organizing network device, and the maximum communication distance of the broadband self-organizing network device is greater than the maximum communication distance of the measurement and control link device, the video image and measurement and control information are transmitted by the point-to-point connection between the airborne satellite device and the ground satellite portable station. The airborne satellite device transmits the video image to the ground portable station system, and the ground portable station transmits the video image between the broadband self-organizing network devices. The video image is passed to the wearable terminal device through the ground broadband networking multi-hop technology; the video image is transmitted to the emergency command center via the airborne satellite device or transmitted back to the emergency command center via the public network service provided by the ground satellite portable station.

[0013] The multi-platform and multi-network integrated emergency communication method provided by the present invention also includes: when the communication quality of the narrowband self-organizing network device does not meet the second preset requirement, using a public network mobile phone terminal to access the public network service and transmit voice.

[0014] The present invention provides an emergency communication system and an emergency communication method based on multi-platform multi-network integration, and an emergency communication system based on multi-platform multi-network integration, including a first unmanned aerial vehicle platform, a second unmanned aerial vehicle platform, a satellite gateway station and a ground optical fiber; the first unmanned aerial vehicle platform is based on a first unmanned aerial vehicle, integrating a public network base station device and a ground satellite portable station, the ground satellite portable station and the satellite gateway station establish a first communication link, the first communication link is connected to the operator core network through the ground optical fiber, and the first unmanned aerial vehicle accesses the public network base station device to provide public network services; the second unmanned aerial vehicle platform is based on a second unmanned aerial vehicle, integrating a narrowband self-organizing network device, a broadband self-organizing network device, an airborne satellite communication device, a measurement and control link device and a fusion command and dispatch module; the airborne satellite device establishes a second communication link with the satellite gateway station, and the second communication link is connected to the emergency command center network through the ground optical fiber; the narrowband self-organizing network device and the broadband self-organizing network device are used to interconnect various ground nodes in the mission area; the fusion command and dispatch module is used to switch the communication network when the network switching condition is met, and the network switching condition includes that the second unmanned aerial vehicle is not within the measurement and control range of the measurement and control link device or the second unmanned aerial vehicle is connected to the The distance of the measurement and control link equipment exceeds the maximum communication distance of the current network equipment and the communication quality of the current network equipment does not meet the requirements. The present invention integrates broadband ad hoc network communication, narrowband ad hoc network communication, high-throughput satellite communication, and public network communication to build an integrated emergency communication network with full coverage of air, space, and ground, providing reliable communication link communication guarantees for emergency rescue. Based on the first UAV platform, the second UAV platform provides multiple communication links to avoid interference with a single platform, provide data link control for scenes within and beyond line of sight, and have a flexible multi-channel link switching mechanism to save satellite bandwidth while reducing communication link pressure, thereby reducing emergency rescue costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the architecture of an emergency communication system based on multi-platform and multi-network integration provided by an embodiment of the present invention; Figure 2It is a schematic diagram of a multi-communication network convergence switching process provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the communication process of the measurement and control link provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Figure 1 A structural diagram of an emergency communication system based on multi-platform and multi-network integration provided in an embodiment of the present invention, the emergency communication system based on multi-platform and multi-network integration includes: The first UAV platform, the second UAV platform, the satellite gateway station and the ground optical fiber; The first drone platform is based on the first drone, and integrates a public network base station device and a ground satellite portable station. The ground satellite portable station establishes a first communication link with the satellite gateway station. The first communication link is connected to the operator core network through the ground optical fiber. The first drone is connected to the public network base station device to provide public network services. The second UAV platform is based on the second UAV and integrates narrowband ad hoc networking equipment, broadband ad hoc networking equipment, airborne satellite communication equipment, measurement and control link equipment and a fusion command and dispatch module; The airborne satellite device establishes a second communication link with the satellite gateway station, and the second communication link is connected to the emergency command center network through the ground optical fiber; the narrowband ad hoc network device and the broadband ad hoc network device are used to interconnect various ground nodes in the mission area; the integrated command and dispatch module is used to switch the communication network when the network switching condition is met, and the network switching condition includes at least one of the following: The second UAV is not within the measurement and control range of the measurement and control link device; The distance between the second UAV and the measurement and control link device exceeds the maximum communication distance of the current network device; The current network device communication quality between the second UAV and the measurement and control link device does not meet the first preset requirement.

[0019] In the embodiment of the present invention, the first preset requirement for the communication quality of the network device is, for example, that the video image transmission delay is less than 500 ms.

[0020] Traditional emergency communication systems use a second drone as the basis for communication, but the second drone has limited load capacity and small installation space. Changes in the drone's heading during flight can also cause changes in communication quality, increase bit errors and image distortion. When the drone is flying beyond visual range, some emergency communication systems require airborne satellite communications to provide both the collected video images and the measurement and control links, but multi-channel video transmission can easily cause bandwidth pressure and affect signal transmission quality.

[0021] An emergency communication system based on multi-platform and multi-network integration provided by an embodiment of the present invention includes a first unmanned aerial vehicle platform, a second unmanned aerial vehicle platform, a satellite gateway station and a ground optical fiber; the first unmanned aerial vehicle platform is based on the first unmanned aerial vehicle, integrating a public network base station device and a ground satellite portable station, the ground satellite portable station establishes a first communication link with the satellite gateway station, the first communication link is connected to the operator core network through the ground optical fiber, and the first unmanned aerial vehicle accesses the public network base station device to provide public network services; the second unmanned aerial vehicle platform is based on the second unmanned aerial vehicle, integrating a narrowband self-organizing network device, a broadband self-organizing network device, an airborne satellite communication device, a measurement and control link device and a fusion command and dispatch module; the airborne satellite device establishes a second communication link with the satellite gateway station, and the second communication link is connected to the emergency command center network through the ground optical fiber; the narrowband self-organizing network device and the broadband self-organizing network device are used to interconnect the various ground nodes in the mission area; the fusion command and dispatch module is used to switch the communication network when the network switching condition is met, and the network switching condition includes that the second unmanned aerial vehicle is not within the measurement and control range of the measurement and control link device or the second The distance between the UAV and the measurement and control link device exceeds the maximum communication distance of the current network device and the communication quality of the current network device does not meet the requirements. The present invention integrates broadband ad hoc network communication, narrowband ad hoc network communication, high-throughput satellite communication, and public network communication to build an integrated emergency communication network with full coverage of air, space, and ground, providing reliable communication link communication guarantee for emergency rescue. Based on the first UAV platform, the second UAV platform provides measurement and control links and backup links to provide data link control for scenes within and beyond line of sight, and has a flexible multi-channel link switching mechanism, which saves satellite bandwidth and reduces the pressure on communication links, thereby reducing the cost of emergency rescue.

[0022] Based on any of the above embodiments, the first drone in the first drone platform needs to meet the communication reliability requirement, and the second drone in the second drone platform needs to meet the communication load requirement. The first drone is, for example, a tethered drone. A wired communication line is used between the tethered drone and the ground portable station, and the communication will not be interfered with or acquired, which is very suitable for sensitive communication needs. The second drone platform is, for example, a composite wing drone, which can carry a large load while maintaining a long flight, thereby meeting the needs of a variety of emergency communication scenarios.

[0023] The first drone platform integrates public network base station equipment, establishes a link with the satellite gateway station through a ground satellite portable station, and the satellite gateway station is connected to the operator's core network through ground optical fiber. The emergency command site uses the drone control platform to raise the public network base station to expand the signal coverage range, providing a guaranteed communication means for the emergency command center, the rescue command site and the rescue operation personnel. In some embodiments of the present invention, the first drone platform can also be a medium or small satellite base station communication vehicle platform, which improves the platform stability and increases the system standby time.

[0024] The second UAV platform integrates private network communication equipment, broadband self-organizing network equipment, airborne satellite communication equipment, measurement and control link equipment, image coding and compression equipment, switching equipment, optoelectronic pod equipment, etc. The optoelectronic pod is used to collect video images, and the image coding and compression equipment is used to compress and encode the video images.

[0025] The second UAV platform establishes a satellite link with the satellite gateway station through the airborne satellite equipment. The satellite gateway station is connected to the emergency command center network through ground optical fiber, and can transmit the collected video images back to the emergency command center to provide data support for the commander to analyze the on-site situation. The second UAV carries narrowband self-organizing network equipment and broadband self-organizing network equipment to fly over the mission area, interconnecting the various ground nodes in the mission area and realizing the signal relay function in the air, effectively reducing the terrain's obstruction to the signal and expanding the effective transmission distance of the signal.

[0026] In some embodiments of the present invention, the second UAV platform may also be a fixed-wing UAV platform, which can meet various communication load requirements while integrating public network communication equipment on the fixed-wing UAV, thereby expanding the public network coverage and enhancing the communication bandwidth rate.

[0027] In the embodiment of the present invention, the narrowband ad hoc network device includes: a narrowband ad hoc network host and a narrowband antenna. By configuring a narrowband communication channel, the narrowband ad hoc network host and the intercom device perform voice communication through the narrowband antenna.

[0028] The broadband ad hoc network device includes: a broadband ad hoc network host and a broadband antenna. By constructing a broadband communication channel within a preset range, the broadband ad hoc network host performs video communication with the wearable terminal device through the broadband antenna.

[0029] In the embodiment of the present invention, the wearable terminal device is, for example, a single-soldier backpack device.

[0030] The airborne satellite communication equipment integrates a modem, an antenna, a radio frequency, a frequency conversion, an inertial navigation system and an antenna control unit.

[0031] The airborne satellite communication equipment adopts a 0.35-meter-diameter parabolic three-axis moving communication. The equipment is highly integrated, integrating components such as the modem, antenna, radio frequency, frequency conversion, inertial navigation, and antenna control unit, and meets the payload requirements of the second UAV.

[0032] In an embodiment of the present invention, relay satellite communications use high-orbit satellites as relay satellites for forwarding, and may also use low-orbit Starlink satellites as relay satellites for forwarding, thereby reducing satellite delays, reducing space link losses, and increasing bandwidth transmission rates.

[0033] In the embodiment of the present invention, the ground portable station adopts a 0.6-meter-diameter Ka-type portable station. The portable station is composed of a Ka antenna, a transceiver, a modem, etc., and adopts an integrated design to achieve one-key communication, fast network access, and simple operation. The protection level and wind resistance meet the normal use in various harsh environments.

[0034] The second UAV platform further includes: a measurement and control link device, the measurement and control link device includes a measurement and control host and a measurement and control antenna, by constructing a measurement and control communication channel within a preset range, the measurement and control host establishes a point-to-point link communication with the ground measurement and control station through the measurement and control antenna, and remotely monitors the UAV in the second UAV platform; In the embodiment of the present invention, satellite communication equipment can be completely used to replace the original measurement and control equipment, thereby reducing the load of the second UAV, reducing economic costs, and reducing interference between the measurement and control L band and the satellite baseband.

[0035] like Figure 2 As shown, an embodiment of the present invention further provides a multi-platform multi-network integrated emergency communication method, which is applied to the multi-platform multi-network integrated emergency communication system as described in the above embodiment, including: Based on the first unmanned aerial vehicle, a public network base station device and a ground satellite portable station are integrated, the ground satellite portable station establishes a first communication link with the satellite gateway station, and a public network service is provided through the first communication link; Based on the second UAV, a narrowband self-organizing network device, a broadband self-organizing network device, and an airborne satellite communication device are integrated. The airborne satellite device establishes a second communication link with the satellite gateway station. The narrowband self-organizing network device or the broadband self-organizing network device provides an emergency network through the second communication link, and switches the communication network when the network switching condition is met. The network switching condition includes that the second UAV is not within the measurement and control range of the measurement and control link device or the distance between the second UAV and the measurement and control link device exceeds the maximum communication distance of the current network device and the communication quality of the current network device does not meet the requirements.

[0036] Specifically, when the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the measurement and control link device, and the maximum communication distance of the measurement and control link device is less than the maximum communication distance of the broadband ad hoc network device, the video image is transmitted by the broadband ad hoc network device; the video image is transmitted to the wearable terminal device through the multi-hop technology of the broadband ad hoc network; information such as the measurement and control position and distance of the second UAV is provided by the measurement and control link device.

[0037] When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the measurement and control link device, and the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, the video image is transmitted by the broadband self-organizing network device; the video image is transmitted to the wearable terminal device through the multi-hop technology of the broadband self-organizing network; the measurement and control information of the second UAV is transmitted by the measurement and control link, and the measurement and control link is established by a point-to-point connection between the airborne satellite equipment and the ground satellite portable station through the double-hop technology under the same beam coverage of the satellite.

[0038] When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the measurement and control link device, and the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, but the broadband self-organizing network transmission quality does not meet the preset requirements, the video image and the measurement and control information of the UAV are transmitted by the measurement and control link, and the measurement and control link is established by the airborne satellite device and the ground satellite portable station through a point-to-point connection using a double-hop technology under the same satellite beam coverage; the airborne satellite device transmits the video image to the ground portable station, the ground portable station transmits the video image between the broadband self-organizing network devices, and the video image is passed to the wearable terminal device through the ground broadband networking multi-hop technology.

[0039] When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the broadband self-organizing network device, and the maximum communication distance of the broadband self-organizing network device is greater than the maximum communication distance of the measurement and control link device, the video image and measurement and control information are transmitted by the point-to-point connection between the airborne satellite device and the ground satellite portable station. The airborne satellite device transmits the video image to the ground portable station system, and the ground portable station transmits the video image between the broadband self-organizing network devices. The video image is passed to the wearable terminal device through the ground broadband networking multi-hop technology; the video image is transmitted to the emergency command center via the airborne satellite device or transmitted back to the emergency command center via the public network service provided by the ground satellite portable station.

[0040] When the communication quality of the narrowband ad hoc network device does not meet the second preset requirement, a public network mobile phone terminal is used to access the public network service to transmit voice.

[0041] In an embodiment of the present invention, the second preset requirement is, for example, that the Mean Opinion Score (MOS) is not less than 3. The MOS score is an indicator for measuring the voice quality of a communication system, and is scored on a 5-point scale, where 5 points represent the best, 4 points represent good, 3 points represent fair, 2 points represent poor, and 1 point represents poor. When the MOS score of the narrowband ad hoc network device communication is less than 3, unclear voice will occur in the narrowband ad hoc network communication. At this time, it should be switched to using a public network mobile phone terminal to access the public network service to transmit voice.

[0042] When the satellite link is established between the airborne satellite communication equipment and the portable station, the measurement and control communication link of the second UAV is as follows: Figure 3 As shown in the figure, one link is to transmit telemetry data to the communication satellite through the airborne satellite communication equipment, and the communication satellite transmits the telemetry data to the ground portable measurement and control station through the satellite communication portable station; the other link is to transmit data to the communication satellite through the satellite gateway station, and the communication satellite transmits the data to the ground portable measurement and control station through the satellite communication portable station. The business system supported by the UAV mission payload is integrated with the measurement and control system of the UAV to provide a measurement and control link or a measurement and control backup link.

[0043] The present invention deeply integrates broadband and narrowband communications, public network communications, satellite communications, etc., gives full play to the functions of different network dimensions, breaks down the barriers to data sharing between independent network systems, and meets the future communication network's needs for full-time, full-domain, and full-space communications and network interconnection. It can serve as a basic guarantee for communication needs during sudden emergencies. It can ensure user access in an emergency, and the communication network can be quickly and efficiently restored and operated, providing important communication network support for rescue work. It is of great significance to shorten the "2-hour information blind window" of emergencies and compete for the "72 golden hours of life rescue."

[0044] The emergency communication system based on multi-platform and multi-network integration provided by the present invention solves the problem of terrain environment blocking the communication link, solves the problem that the load capacity of the second drone used in the existing invention is limited, and the installation space is small. When the airborne satellite signal is affected, it is easy to cause video stream congestion, image freeze, transmission distortion and other problems. It solves the problem that the change of the heading of the drone during flight will also cause the change of communication quality, causing the signal coverage area to keep changing and affecting the communication quality; solves the problems of bandwidth resource shortage and poor link quality caused by the measurement and control link and multi-channel video transmission during beyond-visual-range flight.

[0045] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0046] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An emergency communication system based on multi-platform and multi-network integration, characterized in that: include: The first UAV platform, the second UAV platform, the satellite gateway station and the ground optical fiber; The first drone platform is based on the first drone, and integrates a public network base station device and a ground satellite portable station. The ground satellite portable station establishes a first communication link with the satellite gateway station. The first communication link is connected to the operator core network through the ground optical fiber. The first drone is connected to the public network base station device to provide public network services. The second UAV platform is based on the second UAV and integrates narrowband ad hoc networking equipment, broadband ad hoc networking equipment, airborne satellite communication equipment, measurement and control link equipment and a fusion command and dispatch module; The airborne satellite device establishes a second communication link with the satellite gateway station, and the second communication link is connected to the emergency command center network through the ground optical fiber; The narrowband ad hoc network device and the broadband ad hoc network device are used to interconnect various ground nodes in the mission area; the integrated command and dispatch module is used to switch the communication network when the network switching condition is met, and the network switching condition includes at least one of the following: The second UAV is not within the measurement and control range of the measurement and control link device; The distance between the second UAV and the measurement and control link device exceeds the maximum communication distance of the current network device; The current network device communication quality between the second UAV and the measurement and control link device does not meet the first preset requirement.

2. The emergency communication system based on multi-platform and multi-network integration according to claim 1 is characterized in that: The narrowband ad hoc network device comprises: a narrowband ad hoc network host and a narrowband antenna. By configuring a narrowband communication channel, the narrowband ad hoc network host and the intercom device perform voice communication through the narrowband antenna.

3. The emergency communication system based on multi-platform and multi-network integration according to claim 1 is characterized in that: The broadband ad hoc network device includes: a broadband ad hoc network host and a broadband antenna. By constructing a broadband communication channel within a preset range, the broadband ad hoc network host performs video communication with the wearable terminal device through the broadband antenna.

4. The emergency communication system based on multi-platform and multi-network integration according to claim 1 is characterized in that: The airborne satellite communication equipment integrates a modem, an antenna, a radio frequency, a frequency conversion, an inertial navigation system and an antenna control unit.

5. A multi-platform and multi-network integrated emergency communication method, characterized in that: The emergency communication system based on multi-platform and multi-network integration as claimed in any one of claims 1 to 4 comprises: Based on the first unmanned aerial vehicle, a public network base station device and a ground satellite portable station are integrated, the ground satellite portable station establishes a first communication link with the satellite gateway station, and a public network service is provided through the first communication link; Based on the second UAV, a narrowband ad hoc network device, a broadband ad hoc network device, and an airborne satellite communication device are integrated. The airborne satellite device establishes a second communication link with the satellite gateway station. The narrowband ad hoc network device or the broadband ad hoc network device provides an emergency network through the second communication link, and switches the communication network when a network switching condition is met. The network switching condition includes at least one of the following: The second UAV is not within the measurement and control range of the measurement and control link device; The distance between the second UAV and the measurement and control link device exceeds the maximum communication distance of the current network device The current network device communication quality between the second UAV and the measurement and control link device does not meet the first preset requirement.

6. The multi-platform and multi-network integrated emergency communication method according to claim 5, characterized in that: Also includes: When the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the measurement and control link device, and the maximum communication distance of the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, the video image is transmitted by the broadband self-organizing network device; the video image is transmitted to the wearable terminal device through the multi-hop technology of the broadband self-organizing network; the measurement and control position and distance and other information of the second UAV are provided by the measurement and control link device.

7. The multi-platform and multi-network integrated emergency communication method according to claim 5, characterized in that: Also includes: When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the measurement and control link device, and the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the broadband self-organizing network device, the video image is transmitted by the broadband self-organizing network device; the video image is transmitted to the wearable terminal device through the multi-hop technology of the broadband self-organizing network; the measurement and control information of the second UAV is transmitted by the measurement and control link, and the measurement and control link is established by a point-to-point connection between the airborne satellite equipment and the ground satellite portable station through the double-hop technology under the same beam coverage of the satellite.

8. The multi-platform and multi-network integrated emergency communication method according to claim 5, characterized in that: Also includes: When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the measurement and control link device, and the distance between the second UAV and the measurement and control link device is less than the maximum communication distance of the broadband ad hoc network device, but the broadband ad hoc network transmission quality does not meet the preset requirements, the video image and the measurement and control information of the UAV are transmitted by the measurement and control link, and the measurement and control link is established by the airborne satellite device and the ground satellite portable station through a point-to-point connection using a double-hop technology under the same satellite beam coverage; The airborne satellite equipment transmits the video images to the ground portable station, and the ground portable station transmits the video images between broadband self-organizing network devices. The video images are passed to the wearable terminal device through the ground broadband networking multi-hop technology.

9. The multi-platform and multi-network integrated emergency communication method according to claim 5, characterized in that: Also includes: When the distance between the second UAV and the measurement and control link device is greater than the maximum communication distance of the broadband self-organizing network device, and the maximum communication distance of the broadband self-organizing network device is greater than the maximum communication distance of the measurement and control link device, the video image and measurement and control information are transmitted by the point-to-point connection between the airborne satellite device and the ground satellite portable station. The airborne satellite device transmits the video image to the ground portable station system, and the ground portable station transmits the video image between the broadband self-organizing network devices. The video image is passed to the wearable terminal device through the ground broadband networking multi-hop technology; the video image is transmitted to the emergency command center via the airborne satellite device or transmitted back to the emergency command center via the public network service provided by the ground satellite portable station.

10. The multi-platform and multi-network integrated emergency communication method according to claim 5, characterized in that: Also includes: When the communication quality of the narrowband ad hoc network device does not meet the second preset requirement, a public network mobile phone terminal is used to access the public network service to transmit voice.

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