CN115440096A - Aviation multi-mode converged communication system - Google Patents
Aviation multi-mode converged communication system Download PDFInfo
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Abstract
The invention discloses an aviation multi-mode converged communication system, which is oriented to the application requirements of high-precision positioning navigation, real-time guarantee communication, high-speed data transmission and intelligent decision command of airplanes, takes low cost, generalization, miniaturization and lightweight as design targets, and mutually fuses a satellite communication technology, a wireless ad hoc network technology, a differential high-precision positioning navigation technology, an aviation broadcast response technology, a 5G public network communication technology and the like. The invention includes: the system comprises an aviation multimode communication airborne terminal, aviation multimode ground control equipment and an air traffic control intelligent information decision software platform, wherein one piece of ground control equipment can simultaneously communicate with and control up to 32 airborne terminals so as to overcome the defects of low communication rate, long time delay, poor interconnection capacity and the like in the current aviation communication data transmission process and realize reasonable and effective planning, use and configuration of low-altitude network frequency resources; the integrated service of data communication, collection, sharing, analysis, decision making and the like is provided for the airplane.
Description
Technical Field
The invention relates to the technical field of aviation communication, in particular to an aviation multi-mode fusion communication system integrating a satellite, an unmanned aerial vehicle and a ground station, which can realize the fusion of various functional communication such as self-organizing private network communication, beidou short messages, ADS-B broadcasting, RTK high-precision positioning navigation, 5G public network and the like.
Background
The continuous progress of the communication technology promotes the vigorous development of the aviation communication field in China. In industrial application, the demand of unmanned aerial vehicles is increasing day by day, resulting in intensive interweaving of aerial signals and increasingly complex signal forms, ineffective transmission of aerial communication data and insufficient utilization of low-altitude network resources. In order to reasonably and effectively plan, use and configure frequency resources, a communication system with the characteristics of high speed, low time delay and wide connection becomes the mainstream of aviation communication development, and the construction of a space-air-ground integrated aviation communication network is more important.
The invention relates to an aviation multi-mode converged communication system which has multiple functions of self-organizing private network communication, beidou short message communication, ADS-B broadcast communication, RTK high-precision positioning navigation, 5G public network communication and the like. The invention constructs a three-dimensional integrated communication network of a satellite, an unmanned aerial vehicle and a ground station, provides a space-ground integrated aviation communication system scheme, provides a solution for high-precision positioning, real-time communication and high-speed transmission of the unmanned aerial vehicle, provides services such as unmanned aerial vehicle data communication, collection, sharing, analysis and display for industrial application, lays a foundation for constructing a universal, open, interconnected and comprehensive aviation communication network, and promotes the development of the aviation fusion communication field in China.
Disclosure of Invention
Aiming at the difficult problems of various communication links, inconsistent communication protocols, complex cabin equipment, limited working environment and the like in the field of aviation communication, the invention aims at the application requirements of high-precision positioning navigation, real-time guarantee communication, high-speed data transmission and intelligent decision command of airplanes, takes low cost, generalization, miniaturization and light weight as design targets, and fuses a satellite communication technology, a wireless ad hoc network technology, a differential high-precision positioning navigation technology, an aviation broadcast response technology, a 5G public network communication technology and the like.
In order to achieve the above object, the present invention provides an aviation multimode converged communication system, comprising: the system comprises an aviation multimode communication airborne terminal, aviation multimode ground control equipment and an air traffic control intelligent information decision software platform;
the aviation multimode communication airborne terminal integrates the technical advantages of self-organizing private network communication, high-precision navigation, satellite communication, 5G internet and aviation air traffic control technology, so that the airplane can accurately, real-timely and quickly realize data exchange with a ground control center and other airplanes in the air in the navigation process, and reliable data information service is provided for the airplane;
the aviation multimode ground control equipment adopts a TDMA mechanism, supports an aviation multimode communication airborne terminal to carry out communication control, has the functions of processing, analyzing, storing, controlling, displaying and forwarding received information, and can realize the functions of data storing and forwarding, ADS-B broadcast monitoring and remote-measuring remote-control health monitoring;
the air traffic control intelligent information decision software platform integrates a 4G/5G mobile communication overlay network technology, a standardized interface cloud platform management and service system and a big data analysis platform technology, and constructs a perfect airplane supervision system around airplane real-time positioning, cluster interconnection and intercommunication, life cycle health monitoring and key area prevention and control.
According to the aviation multimode converged communication system, one aviation multimode ground control device can be simultaneously communicated with and controlled by 32 aviation multimode communication airborne terminals.
The aviation multimode converged communication system comprises: the system comprises an image transmission/data transmission ad hoc network data chain, a 5G public network communication data chain, an RTK high-precision differential positioning navigation, a Beidou short message data chain and an ADS-B air broadcast communication data chain;
the graph transmission/data transmission ad hoc network data chain has the functions of transmitting images and videos from an airplane end to a ground end and telemetering downlink load data; the remote control system has the functions of remotely controlling the flight state of the unmanned aerial vehicle from the ground end to the airplane end and the uplink working state of airborne equipment; the system has the function that one ground station can simultaneously and bidirectionally communicate with up to 32 airborne terminal products;
the 5G public network communication data chain has the functions of transmitting images and videos from an airplane end to a ground end and telemetering downlink load data; the remote control system has the functions of remotely controlling the flight state of the unmanned aerial vehicle from the ground end to the airplane end and the uplink working state of airborne equipment;
the RTK high-precision differential positioning navigation provides a time service function; providing a differential high-precision navigation positioning function; providing speed and direction measuring functions; receiving a satellite: BDS and GPS;
the Beidou short message data link provides continuous short message service; providing emergency location reporting services; when an emergency occurs, sending alarm information according to a trigger instruction sent by an airplane control module;
the ADS-B over-the-air communication data link comprises: ADS-B IN and ADS-B OUT; ADS-B IN is specifically: the airborne ADS-B receives other broadcast ADS-B messages of other airplanes in real time, recombines the received various messages according to the application requirements of users, assembles the messages into a mode state MS report which accords with the RTCA/DO-260B standard and further processes the MS report for a flight control system; ADS-B OUT is specifically as follows: the airborne ADS-B receives navigation information containing longitude and latitude, height and speed contents from a flight control system, inserts an ME field in a DF18 format, assembles different types of ADS-B messages transmitted by 1090ES data chains, and transmits the ADS-B messages in a broadcasting mode through an omnidirectional antenna.
The aviation multimode converged communication system is characterized in that in the graph transmission/data transmission ad hoc network data link, image information is derived from an aircraft optical lens, and the photoelectric lens is connected with an airborne communication terminal through a network port: data information comes from the aircraft flight control platform, and the flight control platform is connected with airborne communication terminal through serial ports RS232 or RS 422: image and data information of the airplane are sent to a ground control terminal through an image transmission/data transmission ad hoc network data link, and the transmission mode is transparent transmission; the uplink information of the ground control instruction is sent to the airborne terminal through the data link of the image transmission/data transmission ad hoc network and is sent to the airplane flight control platform through the serial port RS232 or RS422 interface.
The aviation multimode converged communication system is characterized in that the 5G public network communication data link provides airplane and ground communication services according to the signal coverage range of a ground base station; simultaneously support 5G/4G/3G network system; the comprehensive coverage of various network systems of 4G/5G and LTE is supported; image information comes from aircraft optical lens, and photoelectric lens passes through the net gape with machine carries communication terminal and is connected: data information comes from the aircraft flight control platform, and the flight control platform is connected with airborne communication terminal through serial ports RS232 or RS 422: the image and data information of the airplane are sent to a ground control terminal through a 5G public network communication data link, and the transmission mode is transparent transmission; the ground control instruction uplink information is sent to the airborne terminal through a 5G public network communication data link and is sent to the airplane flight control platform through a serial port RS232 or RS422 interface.
According to the aviation multi-mode fusion communication system, the RTK high-precision differential positioning navigation receives navigation information sent by a GPS/Beidou satellite navigation system through the two differential antennas, and positioning, speed measurement and orientation data are sent to the flight control platform after demodulation and resolving, so that a high-precision navigation positioning function is provided.
In the aviation multi-mode converged communication system, in the big dipper short message data chain, big dipper downlink information comes from the airplane flight control platform and is a 78-byte fixed-length character string which is sent every 60 seconds; the flight control platform and the airborne communication terminal are communicated through RS232 and RS422 interfaces, and each interface can realize full duplex transmission of all data; the airborne communication terminal sends the Beidou downlink information to a Beidou satellite and sends the Beidou downlink information to the ground control equipment through the Beidou satellite; the ground control equipment sends the Beidou uplink information to the Beidou satellite and sends the Beidou uplink information to the airborne communication terminal through the Beidou satellite relay.
IN the aviation multimode converged communication system, IN the ADS-B air broadcast communication data link, ADS-B IN information and related warning messages received by an aviation multimode communication airborne terminal are downloaded to aviation multimode ground control equipment through a data transfer ad hoc network data link/5G public network communication data link/beidou short message data link, the ground control equipment provides a human-computer interface, the current air situation of the airplane is dynamically displayed IN the form of information or a map, and the human-computer interface provides an acoustic and optical warning function of the airplane IN abnormal flight state to remind the commander of responding IN time; the man-machine interface provides the fault warning function of the ADS-B equipment; displaying flight identification information by a human-computer interface; ADS-B OUT information is from an airplane flight control platform, the flight control platform is communicated with an airborne communication terminal through RS232 and RS422 interfaces, and all data full-duplex transmission can be achieved through each interface.
The aviation multimode converged communication system is characterized in that the working state of the system is divided into 3 stages: a ground sliding stage, a flight climbing/landing stage and a long-distance flight stage; the ground sliding stage comprises: a ground-to-machine communication distance <0.5KM; the flight climbing/landing stage is as follows: 0.5KM < ground-to-machine distance <10KM; the long-distance flight phase comprises the following steps: 10KM < communication distance to ground.
In the aviation multimode converged communication system, in the ground sliding stage, the communication distance between the aviation multimode communication airborne terminal and the aviation multimode ground control equipment is within 0.5KM, good public network base stations and RTK ground signals are arranged around the aviation multimode communication airborne terminal, and all communication modes can work normally;
in a flight climbing/landing stage, the height of the airplane is gradually increased, when the flight height exceeds the coverage range of a public network base station and an RTK foundation enhanced signal, the 5G public network communication data link stops working, the RTK high-precision differential positioning navigation only keeps a single-point positioning function, and the image transmission/data transmission ad-hoc network data link, the Beidou short message data link and the ADS-B air broadcast communication data link can normally work;
in the long-distance flight stage, when the aircraft exceeds the communication range of the map transmission/data transmission ad hoc network data chain, the map transmission/data transmission ad hoc network data chain and the 5G public network communication data chain are suspended, the RTK high-precision differential positioning navigation only keeps the single-point positioning function, and both the Beidou short message data chain and the ADS-B air broadcast communication data chain can normally work.
Compared with the prior art, the invention has the technical beneficial effects that:
(1) The aviation multimode communication system integrates a plurality of functions of self-organizing private network communication, beidou short message communication, ADS-B broadcast communication, RTK high-precision positioning navigation, 5G public network communication and the like, integrates communication functions, can not only perform data transmission and finger control communication through links such as private networks, public networks, beidou satellites and the like and ground terminals, but also can process, analyze, store, control, display and forward information such as ADS-B IN information, image information, position information, state and the like of airplanes, and provides a man-machine analysis decision basis for data generated by aviation communication.
(2) A dynamic communication system of starry-sky-ground integration is formed, smooth, efficient and reliable exchange of air information can be effectively guaranteed, and positioning, allocation, coordination and management of unmanned aerial vehicle resources by operators are facilitated.
Drawings
The invention provides an aviation multimode converged communication system, which is provided by the following embodiments and attached drawings.
Fig. 1 is a block diagram of an architecture of an aviation multimode converged communication system, which is composed of an aviation multimode communication airborne terminal, aviation multimode ground control equipment and an air traffic control intelligent information decision software platform.
Detailed Description
An airborne multi-mode converged communication system of the present invention is described in further detail below.
The invention provides an aviation multi-mode converged communication system, which integrates key technologies such as high-speed ad hoc network, high-precision positioning, mobile communication, information fusion of air traffic control broadcasting, product integration and the like; the airborne terminal product has the characteristics of low cost, high reliability, miniaturization, light weight and integration; the ground control terminal realizes high performance, high processing and one station with a plurality of machines; through a digitalized and intelligent air traffic control information processing platform, a satellite-air-ground integrated aviation communication system is formed, services such as data transmission, image transmission, remote measurement, remote control, beidou satellite message, broadcast monitoring, health monitoring and the like are provided, low-altitude network resources are reasonably optimized, and healthy navigation of an airplane is guaranteed.
The system integrates various communication functions such as a graph transmission/data transmission ad hoc network data chain, a 5G public network communication data chain, RTK high-precision differential positioning navigation, a Beidou short message data chain, an ADS-B air broadcasting communication data chain and the like, and is shown in the attached figure 1.
(1) Data chain of image transmission/data transmission ad hoc network
The system has the functions of transmitting image, video, remote measurement and other downlink load data (from an airplane end to a ground end);
the remote control function (from the ground end to the airplane end) of the flight state of the unmanned aerial vehicle and the uplink working state of airborne equipment is provided;
the function of one ground station for bidirectional communication with up to 32 onboard terminal products simultaneously;
the image information comes from an optical lens of the airplane, and the photoelectric lens is connected with the airborne communication terminal through a network port:
data information comes from the airplane flight control platform, and the flight control platform is connected with the airborne communication terminal through a serial port RS232 or RS 422:
sending the image and data information of the airplane to a ground control terminal through an image transmission/data transmission ad hoc network data link, wherein the transmission mode is transparent transmission;
and uplink information such as a ground control instruction and the like is sent to the airborne terminal through the graph transmission/data transmission ad hoc network data link and is sent to the airplane flight control platform through a serial port RS232 or RS422 interface.
(2) 5G public network communication data link
A function of transmitting downlink load data such as images, videos, and remote measurement (from an aircraft end to a ground end);
the remote control function (from the ground end to the airplane end) of the flight state of the unmanned aerial vehicle and the uplink working state of the airborne equipment is provided;
providing aircraft and ground communication services based on ground base station signal coverage;
simultaneously supporting a 5G/4G/3G network system;
operator: telecommunication, mobile, unicom;
support the comprehensive coverage of various network systems of 4G/5G and LTE;
the image information comes from an optical lens of the airplane, and the photoelectric lens is connected with the airborne communication terminal through a network port:
the data information comes from an airplane flight control platform, and the flight control platform is connected with the airborne communication terminal through a serial port RS232 or RS 422:
sending the image and data information of the airplane to a ground control terminal through a 5G public network communication data link, wherein the transmission mode is transparent transmission;
and uplink information such as ground control instructions and the like is sent to the airborne terminal through a 5G public network communication data link and is sent to the airplane flight control platform through a serial port RS232 or RS422 interface.
(3) RTK high-precision differential positioning navigation
Providing a time service function;
providing a differential high-precision navigation positioning function;
providing speed and direction measuring functions;
receiving the satellite: BDS, GPS, etc.;
navigation information sent by satellite navigation systems such as GPS/Beidou and the like is received through the two differential antennas, and positioning, speed measurement and orientation data are sent to the flight control platform after demodulation and calculation, so that a high-precision navigation positioning function is provided.
(4) Beidou short message data chain
Providing continuous short message service;
providing emergency location reporting services;
and when an emergency occurs, sending alarm information according to a trigger instruction given by the aircraft control module.
Beidou downlink information comes from an airplane flight control platform and is a 78-byte fixed-length character string which is sent every 60 seconds;
the flight control platform and the airborne communication terminal communicate through RS232 and RS422 interfaces, and each interface can realize full duplex transmission of all data;
the airborne communication terminal sends the Beidou downlink information to the Beidou satellite and sends the Beidou downlink information to the ground control equipment through the Beidou satellite;
and the ground control equipment sends the Beidou uplink information to the Beidou satellite and sends the Beidou uplink information to the airborne communication terminal through the Beidou satellite relay.
(5) ADS-B over-the-air communication data link
ADS-B IN: the airborne ADS-B receives other airplane broadcast ADS-B messages in real time, recombines the received various messages according to the application requirements of users, assembles the messages into a Mode State (MS) report which accords with the RTCA/DO-260B standard, and further processes the report for a flight control system;
ADS-B OUT: the airborne ADS-B receives navigation information containing longitude and latitude, height, speed and the like from a flight control system, inserts an ME field in a DF18 format, assembles different types of ADS-B messages transmitted by a plurality of 1090ES data chains, and transmits the ADS-B messages in a broadcasting mode through an omnidirectional antenna;
the ADS-B IN information and related warning messages received by the airborne terminal of the aviation multimode communication are downloaded to the aviation multimode ground control equipment through a data transmission ad hoc network data link/5G public network communication data link/Beidou short message data link, the ground control equipment provides a human-computer interface, the air situation of the current airplane is dynamically displayed IN the form of information or a map, and the human-computer interface provides an acoustic and optical warning function for the abnormity of the flight state of the airplane and reminds the director to respond IN time; the man-machine interface provides an ADS-B equipment fault warning function; the human-machine interface displays information such as flight identification information (flight number or call number).
ADS-B OUT information is from an airplane flight control platform, the flight control platform and an airborne communication terminal are communicated through RS232 and RS422 interfaces, and all data full-duplex transmission can be achieved through each interface.
The working state of the aviation multi-mode converged communication system is mainly divided into 3 stages: ground gliding phase, flight climbing/descending phase and long-distance flight phase.
(1) Ground sliding stage (communication distance between the machine and the ground <0.5 KM)
In the ground sliding stage, the communication distance between the aviation multimode communication airborne terminal and the aviation multimode ground control equipment is within 0.5KM, good public network base stations and RTK foundation signals are arranged around the terminal, and all communication modes can work normally.
(2) Flight climb/descent phase (0.5 KM < ground-to-machine communication distance <10 KM)
In the flight climbing/landing stage, the height of the airplane is gradually increased, when the flight height exceeds the coverage range of the public network base station and the RTK foundation enhanced signal, the 5G public network communication data link stops working, the RTK high-precision differential positioning navigation only keeps the single-point positioning function, and the image transmission/data transmission ad-hoc network data link, the Beidou short message data link and the ADS-B air broadcast communication data link can work normally.
(3) Long-distance flight phase (10 KM < distance of communication between machine and ground)
In the long-distance flight stage, when the aircraft exceeds the communication range of the map transmission/data transmission ad hoc network data chain, the map transmission/data transmission ad hoc network data chain and the 5G public network communication data chain are suspended, the RTK high-precision differential positioning navigation only keeps the single-point positioning function, and both the Beidou short message data chain and the ADS-B air broadcast communication data chain can normally work.
Claims (10)
1. An airborne multi-mode converged communication system, comprising: the system comprises an aviation multimode communication airborne terminal, aviation multimode ground control equipment and an air traffic control intelligent information decision software platform;
the aviation multimode communication airborne terminal integrates the technical advantages of self-organizing private network communication, high-precision navigation, satellite communication, 5G internet and aviation air traffic control technology, so that the airplane can accurately, real-timely and quickly realize data exchange with a ground control center and other airplanes in the air in the navigation process, and reliable data information service is provided for the airplane;
the aviation multimode ground control equipment adopts a TDMA mechanism, supports an aviation multimode communication airborne terminal to carry out communication control, has the functions of processing, analyzing, storing, controlling, displaying and forwarding received information, and can realize the functions of data storing and forwarding, ADS-B broadcast monitoring, remote measuring and remote control health monitoring by a user;
the air traffic control intelligent information decision software platform integrates a 4G/5G mobile communication overlay network technology, a standardized interface cloud platform management and service system and a big data analysis platform technology, and a complete aircraft supervision system is constructed around aircraft real-time positioning, cluster interconnection and intercommunication, life cycle health monitoring and key area prevention and control.
2. The system of claim 1, wherein one aeronautical multimode ground control device can simultaneously communicate with and control 32 aeronautical multimode communication airborne terminals.
3. An airborne multimodal fusion communication system as claimed in claim 2, characterized in that the system comprises: the system comprises an image transmission/data transmission ad hoc network data chain, a 5G public network communication data chain, an RTK high-precision differential positioning navigation, a Beidou short message data chain and an ADS-B air broadcast communication data chain;
the graph transmission/data transmission ad hoc network data chain has the functions of transmitting images and videos from an airplane end to a ground end and telemetering downlink load data; the remote control system has the functions of remotely controlling the flight state of the unmanned aerial vehicle from the ground end to the airplane end and the uplink working state of airborne equipment; the method has the function that one ground station simultaneously communicates with up to 32 airborne terminal products in two ways;
the 5G public network communication data chain has the functions of transmitting images and videos from an airplane end to a ground end and telemetering downlink load data; the remote control system has the functions of remotely controlling the flight state of the unmanned aerial vehicle from the ground end to the airplane end and the uplink working state of airborne equipment;
the RTK high-precision differential positioning navigation provides a time service function; providing a differential high-precision navigation positioning function; providing speed and direction measuring functions; receiving a satellite: BDS and GPS;
the Beidou short message data chain provides continuous short message service; providing emergency location reporting services; when an emergency occurs, sending alarm information according to a trigger instruction sent by an airplane control module;
the ADS-B over-the-air communication data link includes: ADS-B IN and ADS-B OUT; the ADS-BIN is specifically as follows: the airborne ADS-B receives other airplane broadcast ADS-B messages in real time, recombines the received various messages according to the application requirements of users, assembles the messages into a mode state MS report which accords with the RTCA/DO-260B standard, and further processes the MS report to a flight control system; ADS-B OUT is specifically as follows: the airborne ADS-B receives navigation information containing longitude and latitude, height and speed contents from a flight control system, inserts an ME field in a DF18 format, assembles different types of ADS-B messages transmitted by 1090ES data chains, and transmits the ADS-B messages in a broadcasting mode through an omnidirectional antenna.
4. The system as claimed in claim 3, wherein in the graph-transmission/data-transmission ad hoc network data link, the image information comes from the optical lens of the airplane, and the photoelectric lens is connected with the airborne communication terminal through the internet access: data information comes from the aircraft flight control platform, and the flight control platform is connected with airborne communication terminal through serial ports RS232 or RS 422: image and data information of the airplane are sent to a ground control terminal through an image transmission/data transmission ad hoc network data link, and the transmission mode is transparent transmission; the uplink information of the ground control instruction is sent to the airborne terminal through the data link of the image transmission/data transmission ad hoc network and is sent to the airplane flight control platform through a serial port RS232 or RS422 interface.
5. The system of claim 3, wherein the 5G public network communication data link provides aircraft-to-ground communication services based on ground base station signal coverage; simultaneously support 5G/4G/3G network system; the comprehensive coverage of various network systems of 4G/5G and LTE is supported; image information derives from aircraft optical lens, and photoelectric lens passes through the net gape with machine carries communication terminal and is connected: data information comes from the aircraft flight control platform, and the flight control platform is connected with airborne communication terminal through serial ports RS232 or RS 422: the image and data information of the airplane are sent to a ground control terminal through a 5G public network communication data link, and the transmission mode is transparent transmission; the ground control instruction uplink information is sent to the airborne terminal through a 5G public network communication data link and is sent to the airplane flight control platform through a serial port RS232 or RS422 interface.
6. The system of claim 3, wherein the RTK high-precision differential positioning navigation system receives navigation information sent by a GPS/Beidou satellite navigation system through two differential antennas, and sends positioning, speed measurement and orientation data to the flight control platform after demodulation and calculation, so as to provide a high-precision navigation positioning function.
7. The system as claimed in claim 3, wherein in the Beidou short message data chain, beidou downlink information is from an aircraft flight control platform and is a 78-byte fixed-length character string which is sent every 60 seconds; the flight control platform and the airborne communication terminal are communicated through RS232 and RS422 interfaces, and each interface can realize full-duplex transmission of all data; the airborne communication terminal sends the Beidou downlink information to a Beidou satellite and sends the Beidou downlink information to ground control equipment through the Beidou satellite; the ground control equipment sends the Beidou uplink information to the Beidou satellite and sends the Beidou uplink information to the airborne communication terminal through the Beidou satellite relay.
8. The system of claim 3, wherein IN the ADS-B air broadcast communication data link, ADS-B IN information and related warning messages received by an airborne multimode communication terminal are downloaded to an aviation multimode ground control device through a data transmission ad hoc network data link/5G public network communication data link/Beidou short message data link, the ground control device provides a human-computer interface to dynamically display the current air situation of the airplane IN the form of information or a map, and the human-computer interface provides an acoustic and optical warning function for the abnormity of the flight state of the airplane to remind the pilot personnel to respond IN time; the man-machine interface provides an ADS-B equipment fault warning function; the human-computer interface displays the flight identification information; ADS-B OUT information is from an airplane flight control platform, the flight control platform is communicated with an airborne communication terminal through RS232 and RS422 interfaces, and all data full-duplex transmission can be achieved through each interface.
9. The system of claim 1, wherein the system operating state is divided into 3 phases: a ground sliding stage, a flight climbing/landing stage and a long-distance flight stage; the ground sliding stage comprises: a ground-to-machine communication distance <0.5KM; the flight climbing/landing stage is as follows: 0.5KM < ground-to-machine distance <10KM; the long-distance flight phase comprises the following steps: 10KM < communication distance of the ground.
10. The system of claim 9, wherein during the ground taxiing phase, the communication distance between the airborne terminal of the multimode communication and the ground control equipment of the multimode communication is within 0.5KM, good public network base stations and RTK ground signals are located around the terminal, and all communication modes can work normally;
in a flight climbing/landing stage, the height of the airplane is gradually increased, when the flight height exceeds the coverage range of a public network base station and an RTK foundation enhanced signal, the 5G public network communication data link stops working, the RTK high-precision differential positioning navigation only keeps a single-point positioning function, and the image transmission/data transmission ad-hoc network data link, the Beidou short message data link and the ADS-B air broadcast communication data link can normally work;
in the long-distance flight stage, when the aircraft exceeds the communication range of the map transmission/data transmission ad hoc network data chain, the map transmission/data transmission ad hoc network data chain and the 5G public network communication data chain are suspended, the RTK high-precision differential positioning navigation only keeps the single-point positioning function, and both the Beidou short message data chain and the ADS-B air broadcast communication data chain can normally work.
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