Comprehensive modular civil aviation radio monitoring system architecture

Abstract

The invention relates to the field of aviation radio monitoring system design, in particular to a civil aircraft integrated monitoring system, and discloses an integrated modular civil aviation radio monitoring system architecture which comprises a plurality of aperture units, a receiving channel, a transmitting channel, a service processing unit and an interface management unit. The aperture unit is used for receiving and transmitting radio-frequency signals; the aperture unit is connected with the service processing unit through a receiving channel and a transmitting channel; the receiving channel and the transmitting channel respectively process received data and transmitted data; the service processing unit is used for executing different service functions and generating or analyzing data of corresponding communication protocols according to different communication protocols; and the system management unit is used for performing interface management, radio frequency management, configuration management, health management, redundancy management and interface management.

Description

Technical Field

[0001] The present invention relates to the field of aviation radio surveillance system design, and in particular to an integrated modular civil aviation radio surveillance system architecture. Background Art

[0002] Aviation communications, navigation and surveillance (CNS) includes a series of technologies and equipment designed to achieve aircraft communication, navigation and surveillance. Communication refers to the exchange of information between aircraft and ground control centers, other aircraft and operators; navigation refers to determining the aircraft's exact location, flight route and navigation points to ensure the safety and effectiveness of the flight path; surveillance is the tracking and monitoring of aircraft through sensors and communication technologies to ensure flight safety.

[0003] The main function of the civil aviation radio surveillance system is to monitor aircraft through radio detection and data link communication technology, generally through automatic dependent surveillance (ADS-B OUT), air traffic control (ATC) and airborne collision avoidance system (TCAS) and other technical mechanisms. Compared with the traditional ground-based radar system that tracks the position and track of aircraft, this monitoring technology mechanism has greatly improved in coverage, accuracy and real-time performance, especially realizing monitoring functions in remote areas such as oceans.

[0004] The traditional civil aviation navigation and surveillance system adopts a discrete architecture, that is, different radio detection and data link communication functions are realized through independent antenna apertures, transceiver channels and signal / information processing equipment. This architecture has a large number of apertures, high installation difficulty, poor environmental adaptability, and poor installation factors (weight, volume, power consumption). At present, large avionics integration with IMA as the core and large flight control integration with flight control computers as the core have become the mainstream development trends. The comprehensive modular civil aviation radio surveillance system has brought about the optimization of installation factors (weight, volume, power consumption) and the improvement of radio resource (aperture, signal processing, computing resources) utilization. Scientific and efficient system architecture design has become the key to the success of the comprehensive modular civil aviation radio surveillance system. Summary of the invention

[0005] The purpose of the present invention is to propose a comprehensive modular civil aviation radio surveillance system architecture. The modularized surveillance system is easier to maintain, and the fault can be isolated and solved by replacing specific modules without interfering with the entire system, thereby reducing maintenance costs and the risk of system failure; the system supports the upgrade of a single module, and the usability and reusability are also improved, thereby saving development resources and realizing the rapid deployment of the system on different vehicle platforms; the different needs of different vehicle platforms can be met by adding or replacing a single module without rebuilding the entire system, and the scalability is guaranteed.

[0006] The technical solution of the present invention:

[0007] An integrated modular civil aviation radio surveillance system architecture, comprising: a plurality of aperture units, a receiving channel, a transmitting channel, a service processing unit, and an interface management unit;

[0008] The aperture unit is used to send and receive radio frequency signals;

[0009] The aperture unit is connected to the service processing unit through a receiving channel and a transmitting channel; the receiving channel and the transmitting channel process the receiving data and the transmitting data respectively;

[0010] The business processing unit is used to execute different business functions and generate or parse data of corresponding communication protocols according to different communication protocols;

[0011] System management unit: The system management unit is used for interface management, radio frequency management, configuration management, health management, redundancy management and interface management.

[0012] Furthermore, the aperture unit includes: a TCAS omnidirectional antenna, a TCAS directional antenna, a first CNS omnidirectional antenna, and a second CNS omnidirectional antenna. The TCAS omnidirectional antenna and the TCAS directional antenna are used together, which reduces the difficulty of antenna aperture layout and installation elements without affecting the TCAS warning performance; the first CNS omnidirectional antenna and the second CNS omnidirectional antenna are designed in a unified manner, and can be installed on the upper and lower parts of the aircraft to achieve better coverage of the 4π space around the aircraft.

[0013] Furthermore, the receiving channel includes a receiving preprocessing unit and a receiving signal processing unit; the transmitting channel includes a transmitting preprocessing unit and a transmitting signal processing unit; the step-by-step implementation of the preprocessing and signal processing of the transmitting and receiving channels facilitates the isolation of high and low frequencies and improves reliability; at the same time, the step-by-step design provides a basis for sharing preprocessing for different business functions.

[0014] The receiving preprocessing unit and the transmitting preprocessing unit are both implemented by the antenna interface unit, and the receiving signal processing unit and the transmitting signal processing unit are both implemented by the signal processing module.

[0015] Furthermore, the antenna interface unit includes: a TCAS interface unit, a first ATC / ADS-B OUT interface unit, and a second ATC / ADS-B OUT interface unit; the design of the type II three antenna interface units has the best multiplexing rate while ensuring reliability and safety.

[0016] The signal processing module includes: a TCAS signal processing module, a first ATC signal processing module, a first ATC / ADS-BOUT signal processing module, a second ATC signal processing module, and a second ATC / ADS-B OUT signal processing module;

[0017] One end of the TCAS interface unit is connected to the TCAS omnidirectional antenna and the TCAS directional antenna; the other end is connected to the TCAS signal processing module;

[0018] The first ATC / ADS-B OUT interface unit and the second ATC / ADS-B OUT interface unit are connected to the first CNS omnidirectional antenna and the second CNS omnidirectional antenna;

[0019] The first ATC / ADS-B OUT interface unit is connected to the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module;

[0020] The second ATC / ADS-B OUT interface unit is connected to the second ATC signal processing module and the second ATC / ADS-B OUT signal processing module.

[0021] Furthermore, the service processing unit is implemented by a TCAS signal processing module, a first ATC signal processing module, a first ATC / ADS-B OUT signal processing module, a second ATC signal processing module, and a second ATC / ADS-B OUT signal processing module. Different service functions are implemented by different signal processing modules, which can achieve functional isolation and ensure safety.

[0022] Further, the system management unit includes: a first CNS system management module and a second CNS system management module;

[0023] The first CNS system management module is connected to the TCAS signal processing module, the first ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module;

[0024] The second CNS system management module is connected to the TCAS signal processing module, the second ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module.

[0025] Further, the first ATC / ADS-B OUT interface unit and the second ATC / ADS-B OUT interface unit are connected to the first CNS omnidirectional antenna and the second CNS omnidirectional antenna via an antenna switching distribution box;

[0026] The second CNS system management module is also connected to the antenna switching distribution box and controls the switching of the first CNS omnidirectional antenna and the second CNS omnidirectional antenna.

[0027] Furthermore, the business functions include: implementing the automatic dependent surveillance function ADS-B on the airborne platform side in accordance with the DO-260B standard, implementing the air traffic control response function ATC in accordance with the DO-181E standard, and implementing the airborne platform side collision avoidance system TCAS in accordance with the DO-185B standard.

[0028] Furthermore, each business function operates according to the following process:

[0029] The system management unit receives the business data and control instructions, parses them and transmits them to the business processing unit;

[0030] The service processing unit analyzes the service data according to the protocol and processes the service data according to the control instructions, generating a digital signal and transmitting it to the transmission channel;

[0031] The transmitting channel processes the digital signal to generate a radio frequency signal, which is transmitted through the aperture unit;

[0032] The aperture unit receives the RF signal and transmits it to the receiving channel;

[0033] The receiving channel processes the radio frequency signal to generate a digital signal and transmits it to the service processing unit;

[0034] The service processing unit analyzes the digital signal according to the protocol to obtain the analyzed service data;

[0035] The system management unit receives the parsed business data and transmits the business data to the demander outside the system.

[0036] Furthermore, the combination of the first CNS system management module and the TCAS signal processing module, the first ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module and the combination of the second CNS system management module and the TCAS signal processing module, the second ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module are mutually backed up. The dual-redundancy backup design can meet the mandatory requirements in the ATC business function and ADS-B OUT business function standards.

[0037] Beneficial effects of the present invention:

[0038] The present invention discloses a comprehensive modular civil aviation radio surveillance system architecture. The modularized surveillance system is easier to maintain, reducing maintenance costs and system failure risks; the system supports single-module upgrades, ensuring ease of use, reusability, and scalability; the system adopts an integrated design, which greatly simplifies installation elements and can meet layout restrictions in various complex scenarios; at the same time, it realizes redundancy design and implements unified design ideas, ensuring high reliability and high safety of the system. The comprehensive modular civil aviation radio surveillance system architecture design disclosed in the present invention is designed to meet the needs of independently developed large-scale civil transport aircraft as a platform, and has good practical significance and broad application prospects for improving the comprehensive capabilities of aircraft systems and the level of localization. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Comprehensive CNS system business function flow chart;

[0040] Figure 2 Comprehensive CNS system business function flow chart;

[0041] Figure 3 Comprehensive CNS system management function flow chart;

[0042] Figure 4 Comprehensive CNS system logical architecture diagram;

[0043] Figure 5 Comprehensive CNS system physical architecture diagram;

[0044] Figure 6 ATC / ADS-B OUT interface unit schematic. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0046] The present invention provides a comprehensive modular civil aviation radio surveillance system architecture. The system architecture is the organization method of each component of the system. The system form composition and system functional characteristic activities are affected by the organization (interrelationship) of the system. The comprehensive modular civil aviation radio surveillance system integrates a series of radio surveillance technologies and equipment, and its system architecture plays a key role in the coordination of various monitoring functions, resource allocation and four-quality design (reliability, safety, maintainability, and security). The present invention mainly includes the functional architecture, logical architecture and physical architecture of the comprehensive modular civil aviation radio surveillance system.

[0047] The technical solution of the present invention is:

[0048] Comprehensive CNS system functional architecture design:

[0049] The system function architecture describes the relationship between system functions, usually expressed as a hierarchical structure of system functions. Through the functional flow analysis of system functions, the emergent design of system functions is completed. Through functional combination and functional decoupling, the interface simplification and architecture design of the integrated system are realized. The system function architecture of the present invention mainly includes a system function architecture diagram and a system function flow diagram.

[0050] The civil aviation radio surveillance system operates in the long wave band (L band). The functional architecture of the civil aviation radio surveillance system mainly includes business functions and management functions:

[0051] The functional architecture of the civil aviation radio surveillance system is as follows: Figure 1 As shown:

[0052] Business functions refer to the airborne platform monitoring functions realized through radio communication, mainly including the implementation of the airborne platform-side automatic dependent surveillance (ADS-B) function in accordance with the DO-260B standard, the implementation of the air traffic control response (ATC) function in accordance with the DO-181E standard, and the implementation of the airborne platform-side collision avoidance system (TCAS) in accordance with the DO-185B standard.

[0053] The business functions include the necessary functions for operation in the air traffic system derived from DO standards or CTSO standards, such as communication protocols and communication formats, and the power supply, protocol processing, signal processing, RF transceiver, and radiation control functions required for technical implementation. The integrated CNS system design is oriented to the system signal processing, RF transceiver, and radiation control requirements, and applies integrated technologies such as signal integration, channel integration, and aperture integration. The business functions are divided into Figure 2 To organize the functional process:

[0054] Management function refers to the system management function that the integrated modular system should have to realize system operation, mainly including interface management, redundancy management, health management, configuration management, power management function, and radio frequency management function. Its functional process Figure 3 :

[0055] Interface management function design: mainly responsible for the interactive tasks of the system. The system product interface can be divided into mechanical interface, electrical interface and signal interface. The mechanical interface is responsible for the mechanical connection and transmission of the system's form components, the electrical interface is responsible for the energy transmission and signal transmission of the system's form components, and the signal interface is responsible for the information exchange required for the system's functional characteristics. The interface management function realizes the status detection of the electrical interface and realizes the information reception and transmission, protocol conversion and preprocessing of the signal interface.

[0056] Redundancy management function design: mainly responsible for the functional reconstruction of the system. The switching and reconstruction of the system can be divided into active reconstruction and passive reconstruction. Active reconstruction realizes that when a system failure occurs, the system executes the reorganization of the functional flow sequence resources through the preset plan; passive reconstruction realizes the reorganization of the resources required for the functional flow according to the system preset plan based on external instructions or conditions. The redundancy management function realizes the preset plan of system reconstruction to ensure the high security of the system.

[0057] Health management function design: mainly responsible for the system's fault detection tasks. Fault detection is mainly based on power-on self-test, periodic self-test, and maintenance self-test, and system fault status perception is achieved through system hardware test point settings and self-test case design; power-on self-test completes the traversal and execution of all system test points and self-test cases when the system is powered on, and gives a usable conclusion; periodic self-test performs limited hardware test point reading such as heartbeat without affecting system functions, and monitors the system's operating status; maintenance self-test executes system test points and self-test cases on demand according to maintenance instructions to achieve fault isolation. The system's health management function implements the system's power-on self-test solution, periodic self-test solution, and maintenance self-test solution.

[0058] Configuration management function design: mainly responsible for system configuration statistics and reporting tasks. Configuration management provides basic conditions for version change management, version compatibility management, and use and maintenance management within the system life cycle. The configuration management function realizes the version reporting of software / complex electronic hardware in the system and provides system configuration information.

[0059] Power management function design: mainly responsible for power supply management and power supply detection tasks. Power supply management refers to the power on and off of the system components as needed, and power supply monitoring refers to the quality of the system power input and the main / emergency mode monitoring. The power management function realizes the power-on timing control and power-on management of the system components.

[0060] RF management function design: mainly responsible for the interlocking and crosslinking of the system's RF resources (RF channels, integrated apertures, information processing). RF management includes reception interlocking and radiation control: reception interlocking means that when a certain function of the system radiates RF signals due to similar working frequency bands, the receiving paths of other functions are interlocked; radiation control means that when a certain function of the system radiates RF signals due to transmission link multiplexing, the transmission link resources should be locked in advance and released in time after the radiation ends. The RF management function design realizes the status reading and interlocking crosslinking of the system's RF resources, and the compatible design of various monitoring functions.

[0061] Comprehensive CNS system logical architecture design:

[0062] The system logic architecture describes the principle design and physical mechanism selection of the system function implementation, which is usually expressed as the logic and behavior description of the system. The system principle design is completed through system function allocation and logic encapsulation. The system logic architecture should mainly include system logic description and system behavior description. The present invention proposes a logic architecture of a civil aviation radio surveillance system such as Figure 4 :

[0063] The logical architecture of the civil aviation radio surveillance system is based on the basic principles of radio communications and on highly mature RF transceiver solutions in the market. It decomposes and distributes the system's functions into basic logic units, and provides a technical solution for implementing the system's functions through the organization and interaction of basic logic units.

[0064] 1. Aperture unit: performs the radiation and reception of RF signals, and realizes the conversion between analog RF signals and electromagnetic wave signals through different types of antennas.

[0065] 2. Receive preprocessing functional unit: performs amplification and preprocessing of RF receive signals, which is achieved through RF baseband circuit.

[0066] 3. Received signal processing functional unit: performs frequency conversion, filtering, and AD sampling of the RF received signal, and outputs the digital received signal through the RF receiving channel.

[0067] 4. Transmit signal processing functional unit: performs DA conversion, modulation, frequency conversion, and filtering of digital transmit signals, outputs RF transmit signals, and is implemented through RF transmit channels.

[0068] 5. Business processing unit / processing unit: performs reception, analysis, and processing of digital received signals, and outputs business processing results; performs business processing to generate transmission information, and outputs digital transmission signals; performs instruction processing and business function operation. This is achieved through software, complex electronic hardware, and electronic peripherals.

[0069] 6. Interface management unit / interface unit: performs interface conversion and data transmission and reception, and is implemented through interface chips and interface circuits.

[0070] 7. Power supply unit: performs power conversion, and can optionally perform voltage stabilization, voltage transformation, current limiting, and protection. This is achieved through a DC-DC power conversion integrated module or power supply circuit.

[0071] 8. Configuration management unit: performs configuration management. It is implemented through software / complex electronic hardware design.

[0072] 9. Active / standby switching unit: performs active / standby switching and system reconfiguration. This is achieved through software / complex electronic hardware design.

[0073] 10. Health management unit: performs health management through software / complex electronic hardware design and detection circuits.

[0074] 11. RF management unit: performs configuration management. This is achieved through software / complex electronic hardware design and soft / hard switches.

[0075] Business function logic design:

[0076] The business functions rely on the aperture unit, receiving preprocessing unit, receiving signal processing functional unit, and business processing functional unit to realize business data reception and calculation; rely on the aperture unit, receiving preprocessing unit, transmitting signal processing functional unit, and business processing functional unit to realize business data sending.

[0077] System management function logic design:

[0078] The system management function relies on the interface management unit to implement the interface management function; relies on the control of the master-slave switching unit and the other units to implement the redundancy management function; relies on the health management unit and the status detection of the other units to implement the health management function; relies on the configuration management unit and the logic unit containing the software / complex hardware configuration items to implement the configuration management function; relies on the power supply unit and the processing unit to implement the power management function; relies on the radio frequency management unit and the transmitting signal processing function unit and the receiving signal processing function unit to implement the radio frequency management function.

[0079] Comprehensive CNS system physical architecture design:

[0080] The system physical architecture describes the physical composition, interconnection and operation principle of the system, which is usually manifested as the detailed design of the system. The implementation of the system physical architecture is diverse and is affected by multiple factors such as cost, schedule, quality, etc. The present invention provides a physical architecture solution for the integrated CNS system.

[0081] Comprehensive CNS system architecture trade-off design Figure 5 :

[0082] The integrated CNS system consists of 1 CNS integrated rack, 2 ATC / ADS-B OUT interface units, 1 TCAS interface unit, 1 antenna switching distribution box, 2 CNS omnidirectional antennas, 1 TCAS omnidirectional antenna, and 1 TCAS directional antenna.

[0083] The integrated CNS system adopts modular design. The CNS integrated rack can flexibly carry modules such as power modules and CNS system management modules. Through small modular design, high and low frequency isolation, electromagnetic protection, power compatibility, and lightning protection sharing design, the installation elements are greatly reduced. It can realize ATC function, ADS-B OUT function, TCAS function, DME function, and dual redundancy backup of ATC function, ADS-B OUT function / DME function at the same time. The design points include:

[0084] 1. ATC / ADS-B OUT interface unit 1 and ATC / ADS-B OUT interface unit 2 use the antenna switching distribution box to share two CNS omnidirectional antennas to cover the upper and lower airspaces of the carrier platform, reducing the number of apertures from four to two.

[0085] 2. The ATC signal processing module and the ADS-B OUT signal processing module share the ATC / ADS-B OUT interface unit to perform the reception and transmission of RF signals, reducing the number of RF transceiver channels from 4 pairs (one pair for each upper and lower antenna of each module) to 2 pairs.

[0086] 3. The ATC signal processing module and the ADS-B OUT signal processing module adopt a unified hardware design, which realizes different business functions by loading different software / complex electronic hardware, achieving high maintainability.

[0087] 4. The two sets of power modules of the CNS integrated rack, the CNS system management module, the ATC signal processing module, and the ADS-B OUT signal processing module form dual redundancy backup and implement physical isolation design, achieving high reliability and high safety.

[0088] 5. The TCAS interface unit and TCAS signal processing module implement high and low frequency separation design to achieve high reliability.

[0089] 6. The combination of TCAS omnidirectional antenna and TCAS directional antenna reduces the difficulty of antenna aperture layout without affecting TCAS warning performance.

[0090] In particular, the integrated CNS system focuses on the ATC / ADS-B OUT interface unit for RF transmission channel multiplexing design, the schematic diagram of which is shown in the figure below. Figure 6 :

[0091] The ATC / ADS-B OUT interface unit adopts transmission channel integration technology, reducing the transmission channels from 2 to 1, and can realize time-division multiplexing of the transmission channel with 2 waveform functions.

[0092] In the design of the integrated modular civil aviation radio surveillance system architecture, the following ideas are required to be protected:

[0093] 1. Functional architecture design idea of ​​clustering business functions and decoupling management functions;

[0094] 2. Logical architecture design concept of hierarchical and step-by-step processing, high and low frequency isolation, on-demand integration, and time-sharing multiplexing;

[0095] 3. Physical architecture design concept of unified design, small modularization and high maintainability.

[0096] 4. Physical architecture design ideas of aperture integration, channel integration, high reliability and high security.

[0097] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An integrated modular civil aviation radio surveillance system architecture, characterized by: The architecture includes: a plurality of aperture units, a receiving channel, a transmitting channel, a service processing unit, and an interface management unit; The aperture unit is used to send and receive radio frequency signals; The aperture unit is connected to the service processing unit through a receiving channel and a transmitting channel; the receiving channel and the transmitting channel process the receiving data and the transmitting data respectively; The business processing unit is used to execute different business functions and generate or parse data of corresponding communication protocols according to different communication protocols; System management unit: The system management unit is used for interface management, radio frequency management, configuration management, health management, redundancy management and interface management.

2. The system architecture according to claim 1, characterized in that: The aperture unit includes: a TCAS omnidirectional antenna, a TCAS directional antenna, a first CNS omnidirectional antenna and a second CNS omnidirectional antenna.

3. The system architecture according to claim 2, characterized in that: The receiving channel includes a receiving preprocessing unit and a receiving signal processing unit; the transmitting channel includes a transmitting preprocessing unit and a transmitting signal processing unit; The receiving preprocessing unit and the transmitting preprocessing unit are both implemented by the antenna interface unit, and the receiving signal processing unit and the transmitting signal processing unit are both implemented by the signal processing module.

4. The system architecture according to claim 3, characterized in that: The antenna interface unit includes: a TCAS interface unit, a first ATC / ADS-B OUT interface unit, and a second ATC / ADS-B OUT interface unit; The signal processing module includes: a TCAS signal processing module, a first ATC signal processing module, a first ATC / ADS-B OUT signal processing module, a second ATC signal processing module, and a second ATC / ADS-B OUT signal processing module; One end of the TCAS interface unit is connected to the TCAS omnidirectional antenna and the TCAS directional antenna; the other end is connected to the TCAS signal processing module; The first ATC / ADS-B OUT interface unit and the second ATC / ADS-B OUT interface unit are connected to the first CNS omnidirectional antenna and the second CNS omnidirectional antenna; The first ATC / ADS-B OUT interface unit is connected to the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module; The second ATC / ADS-B OUT interface unit is connected to the second ATC signal processing module and the second ATC / ADS-B OUT signal processing module.

5. The system architecture according to claim 4, characterized in that: The service processing unit is implemented by a TCAS signal processing module, a first ATC signal processing module, a first ATC / ADS-B OUT signal processing module, a second ATC signal processing module, and a second ATC / ADS-B OUT signal processing module.

6. The system architecture according to claim 5, characterized in that: The system management unit includes: a first CNS system management module and a second CNS system management module; The first CNS system management module is connected to the TCAS signal processing module, the first ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module; The second CNS system management module is connected to the TCAS signal processing module, the second ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module.

7. The system architecture according to claim 6, characterized in that: The first ATC / ADS-B OUT interface unit and the second ATC / ADS-B OUT interface unit are connected to the first CNS omnidirectional antenna and the second CNS omnidirectional antenna through an antenna switching distribution box; The second CNS system management module is also connected to the antenna switching distribution box and controls the switching of the first CNS omnidirectional antenna and the second CNS omnidirectional antenna.

8. The system architecture according to claim 7, characterized in that: Business functions include: implementing the automatic dependent surveillance function ADS-B on the airborne platform in accordance with the DO-260B standard, implementing the air traffic control response function ATC in accordance with the DO-181E standard, and implementing the airborne platform collision avoidance system TCAS in accordance with the DO-185B standard.

9. The system architecture according to claim 8, characterized in that: Each business function operates according to the following process: The system management unit receives the business data and control instructions, parses them and transmits them to the business processing unit; The service processing unit analyzes the service data according to the protocol and processes the service data according to the control instructions, generating a digital signal and transmitting it to the transmission channel; The transmitting channel processes the digital signal to generate a radio frequency signal, which is transmitted through the aperture unit; The aperture unit receives the RF signal and transmits it to the receiving channel; The receiving channel processes the radio frequency signal to generate a digital signal and transmits it to the service processing unit; The service processing unit analyzes the digital signal according to the protocol to obtain the analyzed service data; The system management unit receives the parsed business data and transmits the business data to the demander outside the system.

10. The system architecture according to claim 9, characterized in that: A combination of the first CNS system management module and the TCAS signal processing module, the first ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module and a combination of the second CNS system management module and the TCAS signal processing module, the second ATC / ADS-B OUT interface unit, the first ATC signal processing module and the first ATC / ADS-B OUT signal processing module back up each other.

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