High-speed communication terminal equipment suitable for low-orbit satellite internet system and design method thereof

Abstract

The invention discloses high-speed communication terminal equipment suitable for a low-orbit satellite internet system and a design method of the high-speed communication terminal equipment. The equipment comprises a low-altitude-end unmanned aerial vehicle, a high-speed communication terminal module, a low-orbit satellite internet communication constellation and a ground core network module. The unmanned aerial vehicle at the low-altitude end and the high-speed communication terminal equipment of the high-speed communication terminal module are respectively connected with a satellite-borne base station of the low-orbit satellite internet communication constellation through a wireless service link, and the satellite-borne base station is connected with the ground core network module through a wireless feed link; the high-speed communication terminal module completes network access of a low-orbit satellite internet by means of a low-orbit satellite internet communication constellation and a ground core network module, and control and specific services of the high-speed communication terminal module on a low-altitude-end unmanned aerial vehicle are achieved. According to the invention, the problem of inconsistency of data transmission information based on a low-orbit satellite internet system environment is solved, and the security of airborne data information of the unmanned aerial vehicle can also be improved under an abnormal condition.

Description

Technical Field

[0001] The present invention relates to the field of low-orbit high-speed communication terminal equipment systems, and in particular to a high-speed communication terminal equipment suitable for a low-orbit satellite Internet system and a design method thereof. Background Art

[0002] my country is currently vigorously developing the low-altitude economy. Various low-altitude aircraft, with drones as the main carriers, are designed in various forms to be able to adapt to the needs of various application scenarios in the future. The communication data link module, as an important component of the drone, is mainly used to realize the accurate transmission of remote control commands to the drone and to ensure the real-time and reliability of sending / receiving to the drone. The problem is that once the communication distance is too long and there are ground obstacles blocking it, the working efficiency of the drone communication data link module used to connect the drone and the user will be greatly affected. Specifically, it can be manifested as inaccurate data instructions due to increased communication data packet loss. Based on this problem and aiming at the demand for faster and more stable communication, by introducing the technology of the low-orbit satellite Internet system, the present invention proposes a design method for high-speed communication terminal equipment suitable for the low-orbit satellite Internet system. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a high-speed communication terminal device suitable for low-orbit satellite Internet systems and a design method thereof.

[0004] Technical solution: The high-speed communication terminal equipment suitable for the low-orbit satellite Internet system described in the present invention includes a low-altitude unmanned aerial vehicle, a high-speed communication terminal module, a low-orbit satellite Internet communication constellation and a ground core network module; the low-altitude unmanned aerial vehicle and the high-speed communication terminal equipment of the high-speed communication terminal module are respectively connected to the satellite-borne base station of the low-orbit satellite Internet communication constellation through a wireless service link, and the satellite-borne base station is connected to the ground core network module through a wireless feeder link. The high-speed communication terminal module completes the access to the low-orbit satellite Internet with the help of the low-orbit satellite Internet communication constellation and the ground core network module, thereby realizing the control of the low-altitude unmanned aerial vehicle and specific services by the high-speed communication terminal module.

[0005] Furthermore, the low-altitude drone includes drone equipment and an onboard high-speed communication equipment module, which accesses the satellite-borne base station of the low-orbit satellite Internet communication constellation through a service link. The satellite-borne base station is connected to the ground core network of the ground core network module through a feeder link, completing the function of connecting the low-altitude drone to the low-orbit satellite network.

[0006] Furthermore, the ground end of the high-speed communication terminal module consists of a high-speed communication terminal device based on a low-orbit satellite Internet system and a user handheld operating device. The two are connected by a wired connection, and the user uses the handheld operating device to realize specific business functions of the low-altitude drone module on the low-altitude side.

[0007] Furthermore, the high-speed communication terminal module includes a low-orbit satellite Internet communication module, a low-orbit satellite Internet array antenna module and a main control module, which realizes data service communication functions with the satellite base station and the core network through a wireless link.

[0008] Furthermore, the low-orbit satellite Internet communication module includes a baseband subsystem, an intermediate frequency subsystem, a control interface and a clock subsystem.

[0009] Furthermore, the low-orbit satellite Internet array antenna module includes an antenna array and an antenna control unit. The antenna array communicates with the satellite base station and the core network in the form of a wireless link; the antenna control unit is powered by the antenna control unit and is used to dynamically track low-orbit satellites passing overhead by controlling the antenna array, and has self-test, monitoring, and logging functions.

[0010] Furthermore, the main control module includes a main control unit, a peripheral interface and an external power supply, which is used to provide the high-speed communication terminal module with the software and hardware basic system environment for system operation, and to power the low-orbit satellite Internet communication module and the low-orbit satellite Internet array antenna module through the external power supply module.

[0011] The design method of a high-speed communication terminal device suitable for a low-orbit satellite internet system according to the present invention includes starting an embedded operating system of the high-speed communication terminal device, starting a high-speed communication terminal subsystem, and executing a "3-machine mode";

[0012] The startup of the embedded operating system of a high-speed communication terminal device includes the following steps:

[0013] S1: High-speed communication terminal equipment system startup, corresponding to the main control module, which is responsible for executing the embedded system startup;

[0014] S2: sequentially load the low-orbit satellite internet communication software system submodule and the low-orbit satellite internet array antenna software system submodule, which run on the low-orbit satellite internet communication module and the low-orbit satellite internet array antenna module respectively;

[0015] S3: Complete the initialization of the high-speed communication terminal equipment system.

[0016] Furthermore, the high-speed communication terminal subsystem is started, comprising the following steps:

[0017] S3: The low-orbit satellite internet communication service model for the user-side low-altitude UAV is composed of a high-speed communication terminal subsystem on the user side and an airborne high-speed access terminal subsystem on the low-altitude UAV.

[0018] S4: Under the control of the user end, the user end can achieve the communication function of collecting and transmitting UAV information data based on the low-orbit satellite Internet system through the low-orbit satellite Internet communication constellation (3) and the ground core network module (4).

[0019] Furthermore, the execution of the "3-machine mode" includes the following steps:

[0020] S5: Trigger strategy: The drone system's 1 / 2 maximum range endurance time is less than the current remaining flight time + the maximum data synchronization time of the drone's onboard storage device, ensuring that the drone can return;

[0021] S6: When there is a need to collect multi-dimensional comparative information of a certain observation point at the same time, a new one is added to the front and the two UAV systems form a communication peer-to-peer network, which also performs data information collection and storage, and performs full data or time-sharing data synchronization;

[0022] S7: After completing data synchronization, any one drone is supported to return to the user end to synchronize the drone's onboard storage data with the user end for data consistency; in abnormal circumstances, after executing step S6 or step S7, at any time, when the handheld management integrated device on the user end detects that the current drone's flight time is less than 1 / 2 of the time required for the maximum range, the user end executes the command to clear the drone's onboard storage data information.

[0023] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention can solve the problem of compatibility with different manufacturers in the adaptation of optional parameters of satellite communication protocols by designing a high-speed communication terminal module, and can solve the inconsistency of digital transmission information based on the low-orbit satellite Internet system environment in the 1 ground terminal-1 drone terminal mode by designing a data transmission mechanism under a 3-end (machine) business mode consisting of 1 ground terminal and 2 peer drone terminals. In abnormal circumstances, it can also improve the security of drone-borne data information. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a high-speed communication terminal device applicable to a low-orbit satellite Internet system according to the present invention;

[0025] Figure 2 This is a structural diagram of a high-speed communication terminal module based on a low-orbit satellite Internet system;

[0026] Figure 3A flow chart of the design method for high-speed communication terminal equipment in the ground-to-low-altitude UAV mode;

[0027] Figure 4 The present invention is an embodiment of a method for designing high-speed communication terminal equipment suitable for a low-orbit satellite Internet system. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1 As shown in the figure, the present invention proposes a high-speed communication terminal device suitable for low-orbit satellite Internet system, which mainly involves four business component modules, namely: a low-altitude UAV 1, which is equipped with an airborne high-speed communication terminal module based on the low-orbit satellite network system, and the wireless service link of the module is connected to the Figure 1 Low-orbit satellite internet communication constellation 3 connected (essentially connected Figure 1 Low-orbit satellite internet communication constellation 3 onboard base station), mainly used for data link communication transmission of UAV; a high-speed communication terminal module 2 based on the low-orbit satellite network system on the ground side, and a handheld terminal module for operating the UAV flight control, the two are connected via Ethernet wired, mainly used to realize the data transmission function of the communication data link of the high-speed communication terminal module 2 UAV through the low-orbit satellite internet communication constellation 3; low-orbit satellite internet communication constellation 3 (this method only involves onboard base stations of 1 to n brand manufacturers' platforms in the onboard resources), the onboard base station is mainly connected to the UAV 1 and high-speed communication terminal module 2 on the low-altitude side through a wireless service link, and is connected to the ground core network module (1 to n brand manufacturers' core networks) through a feeder link; the ground core network module 4 is connected to the low-orbit satellite internet communication constellation 3 by a feeder link, and in this method is mainly used to realize the data transmission function (including multimedia data stream, voice data stream, message log data, etc.) to the UAV 1 and high-speed communication terminal module 2 on the low-altitude side.

[0030] In the conventional drone-user direct interaction mode, such as Figure 1 As shown in the figure, the user on the ground directly controls the flight control attitude of the UAV through the handheld terminal module, and operates the UAV's onboard peripheral devices to perform specific tasks (for example, viewing front-end images or streaming video data through the onboard camera). Under the characteristics of the wireless direct connection model, once there is such a Figure 1 The ground obstacles shown in ⑤ in the middle can easily cause the drone to lose connection with the user and cause the drone to lose control (usually users control the drone in a relatively open environment).

[0031] Compared with the drone-user direct interaction mode, this solution introduces the low-orbit satellite Internet communication constellation 3 low-orbit satellite Internet constellation. By designing airborne (ground) high-speed communication terminal equipment based on the low-orbit satellite network system, it realizes the user-low-orbit satellite-drone application mode for drones, which can effectively solve the shortcomings of the drone-user direct interaction mode.

[0032] Basic design process, such as Figure 1 As shown: the low-altitude UAV 1 and the high-speed communication terminal device of the high-speed communication terminal module 2 are respectively connected to the satellite base station of the low-orbit satellite Internet communication constellation 3 through a wireless service link. The satellite base station is connected to the ground core network module 4 through a wireless feeder link. The high-speed communication terminal module 2 completes the access to the low-orbit satellite Internet with the help of the low-orbit satellite Internet communication constellation 3 and the ground core network module 4, and realizes the control of the low-altitude UAV 1 and specific services (including flight control attitude, multimedia streaming video and message data, etc.) by the high-speed communication terminal module 2.

[0033] about Figure 1 The UAV 1 at the low and medium altitude end, in this design, the single UAV module at the low altitude end is mainly composed of UAV equipment and airborne high-speed communication equipment module (this module can access the low-orbit satellite communication constellation system and serve as the data link communication function of the UAV). The UAV 1 at the low altitude end accesses the satellite-borne base station through the service link, and then the satellite-borne base station completes the function of connecting the UAV 1 at the low altitude end to the low-orbit satellite network through the ground core network connected by the feeder link (similar to the standby state of a mobile phone after it is successfully turned on and connected to the 4 / 5G network). At this point, when Figure 1 The ground side of the medium- and high-speed communication terminal module 2 also completes the same action as module 1 (successfully connects to the satellite Internet). After completing the pairing with the high-speed communication terminal module 2, in this 1 ground side-1 drone side mode, module 1 can perform related low-orbit satellite Internet-based data transmission (streaming data, message service data, etc.) specific business functions according to different mission requirements. Furthermore, when in the 1 ground side-1 drone side mode, the low-altitude drone data transmission mission fails due to insufficient power onboard power of the low-altitude drone side. In order to solve this problem, this solution further designs a "1 ground side-2 peer drone sides" mode. When a drone side fails to complete the mission due to insufficient power and is detected by a ground side user, the ground side user immediately adds a drone to form a "1 ground side-2 peer drone sides" working mode. For the functions in this working mode, as well as the problems and solutions that may arise, please refer to [ 1 ground side-2 peer drone sides ]. Figure 3 As stated.

[0034] about Figure 1The medium- and high-speed communication terminal module 2, the ground end is mainly composed of a high-speed communication terminal device based on the low-orbit satellite Internet system and a user handheld operating device. The two are connected by wired, and the user uses the handheld operating device to realize the specific business functions of the low-altitude UAV module of module 1.

[0035] about Figure 1 The low- and medium-orbit satellite internet communication constellation 3 is connected, and multiple satellites operating in low-altitude orbits of 500 to 2000 km from the ground constitute a low-orbit satellite internet communication system. The system is composed of several satellite payloads. The low-orbit satellite internet communication constellation 3 involved in this solution is connected to the satellite-borne base station. The main role of the satellite-borne base station in this solution is to realize the function of connecting and accessing high-speed communication terminal equipment based on the low-orbit satellite network system. These satellite-borne base stations, because the satellites are moving at high speed in low orbit (compared to geosynchronous satellites), the low-altitude drones 1 and high-speed communication terminal modules 2 will continuously switch to connect to different satellite base stations. It should be noted that the satellite-borne base stations of each satellite are provided by multiple manufacturers. Although these manufacturers all follow the low-orbit satellite communication protocol, due to the differences in these manufacturers' understanding of the protocol, the legality verification of the optional protocol parameters in the protocol content will fail, which will lead to the inability to connect to the low-orbit satellite Internet site. For solutions, see. Figure 3 As described in [1] strategy.

[0036] about Figure 1 Ground core network module 4 is mainly used to deploy the core network on the ground. The core network module is also provided by multiple manufacturers. There will also be problems such as failure to verify the legality of the optional protocol parameters in the satellite communication protocol content. For solutions, see Figure 3 As described in the strategy [1].

[0037] To realize the design function of this solution, the main body is the design of a high-speed communication terminal system suitable for low-orbit satellite Internet, such as Figure 2 As shown, it is a design description of the high-speed communication terminal system.

[0038] Design of high-speed communication terminal module based on low-orbit satellite Internet system, such as Figure 2 As shown, it mainly includes three sub-modules, namely: low-orbit satellite Internet communication module 2-1, low-orbit satellite Internet array communication module 2-2, and main control module 2-3. Among them, the design composition and wiring connection method of the low-orbit satellite Internet communication module 2-1 and the low-orbit satellite Internet array communication module 2-2 are the key contents. The main function is to realize data service communication with the satellite base station and core network through wireless links.

[0039] about Figure 2The baseband subsystem described in the low-orbit satellite Internet communication module 2-1 is mainly composed of a domestic CPU, eMMC memory, DDR4 memory and a peripheral expansion interface. Its function is to realize system control of the module and communicate with the intermediate frequency subsystem through the bus interface.

[0040] about Figure 2 The intermediate frequency subsystem described in the low-orbit satellite Internet communication module 2-1 mainly includes uplink and downlink modules. Its function is to receive and send uplink and downlink signals of the array antenna module after the frequency is modulated by the frequency conversion module.

[0041] about Figure 2 The control interface of the low-orbit satellite Internet communication module 2-1 is used to realize Figure 2 The RF real-time control function of the antenna control unit described in module [2].

[0042] about Figure 2 The clock subsystem described in the low-orbit satellite internet communication module 2-1 is used to realize Figure 2 The antenna array described in module [2] provides the function of a reference clock.

[0043] about Figure 2 The frequency conversion module mainly includes uplink and downlink frequency conversion units. The downlink frequency conversion unit is used to convert the received Figure 2 The broadband signal of the Ka band output by the antenna array of the low-orbit satellite Internet array communication module 2-2 is converted into an intermediate frequency signal, and the broadband input signal is converted into a narrowband output to Figure 2 The intermediate frequency subsystem described in the module. Downstream frequency conversion unit is used to convert Figure 2 The intermediate frequency uplink signal output by the intermediate frequency subsystem shown in the low-orbit satellite Internet communication module 2-1 is modulated into a Ka-band signal, and the signal bandwidth is widened to achieve broadband communication and realize the ability to carry high-speed data transmission rate (which can be used for subsequent Figure 3 The designed data business functions provide protection) design purpose.

[0044] about Figure 2 The LEO satellite internet array antenna module described in 2-2 primarily consists of an antenna array and an antenna control unit. The antenna array communicates with satellite base stations and the core network via wireless links. The antenna control unit, powered by the antenna control unit, controls the antenna array to dynamically track overhead LEO satellites and provides self-test, monitoring, and logging capabilities.

[0045] about Figure 2 Main control module 2-3 The main control module is mainly composed of a main control unit, peripheral interface, and external power supply. It is mainly used to Figure 2The high-speed communication terminal module provides the software and hardware basic system environment for the system operation, and provides power to the external power supply module. Figure 2 Module 2-1 and Figure 2 The module 2-2 is powered (via the connection Figure 2 The power interface of the 2-1 module and Figure 2 Power supply interface for the antenna control unit of the 2-2 module).

[0046] like Figure 3 As shown, the design method of high-speed communication terminal equipment suitable for low-orbit satellite Internet system of the present invention is based on Figure 2 Based on the design of the high-speed communication terminal module device shown in the figure, the design is further described in the application scenario of the (ground end-low altitude UAV end) mode. The business process of the system is mainly composed of modules [1]->[2]->[3].

[0047] Business process design starts with Figure 3 As shown in [1]. First, the high-speed communication terminal equipment system is started, corresponding to Figure 2 The main control module 2-3 is responsible for executing the embedded system startup. Secondly, the low-orbit satellite Internet communication software system submodule and the low-orbit satellite Internet array antenna software system submodule are loaded in sequence, corresponding to the running Figure 2 The medium and low orbit satellite internet communication module 2-1 and the low orbit satellite internet array communication module 2-2. At this point, the high altitude communication terminal equipment system initialization is completed.

[0048] Figure 3 The design focus of the middle module [1] is how the high-speed communication terminal equipment system can realize the problem of access legitimacy judgment of the satellite-borne base station system of the low-orbit satellite Internet system and the multimedia and message header legitimacy judgment of the ground core network system. These two problems are essentially caused by the different processing methods of the three parties (high-speed communication terminal equipment system, satellite-borne base station system, and core network system) on the optional protocol parameters involved in the low-orbit satellite Internet communication protocol (reason: because the satellite-borne base station system and the core network system are provided by different manufacturers, and the equipment systems of different manufacturers have inconsistent judgment and processing of optional protocol parameters), which will lead to the inability to access the low-orbit satellite network system or the inability to see video or receive short message data after accessing the system (reason: the base station system or the core network system directly discards the multimedia data stream sent by the high-speed communication terminal equipment system because the number and type of optional protocol parameters contained in the data stream do not match the judgment method of the base station system or the core network system on the optional protocol parameters).

[0049] The solution to this problem is to dynamically retrieve the optional parameters within the low-orbit satellite internet system's use case protocol format (required parameters + optional parameters). For example, a use case format could be required parameters + optional parameter 1, or required parameters + optional parameter 1 + optional parameter 2, and so on. This allows for compatibility with devices and systems from different manufacturers. Program development varies across different languages, but the key steps (using Python as an example) include: dynamically retrieving the number of optional parameters using the len() function; and obtaining the data type of the optional parameter using the isinstance() function.

[0050] In implementation Figure 3 Based on module [1], Figure 3 The design is shown in the module [2]. Initially, the low-orbit satellite Internet communication business model of 1 user end-1 low-altitude UAV end is composed of a high-speed communication terminal subsystem on the user end (1 high-speed communication and 1 handheld flight control and information management integrated device) and an onboard high-speed passage terminal subsystem on the low-altitude UAV. Under the control of the user end, it can be achieved through Figure 1 The modules ③ and ④ achieve the communication function of the user end in the UAV information data collection and transmission based on the low-orbit satellite Internet system.

[0051] Regarding the low-orbit satellite Internet communication business model of 1 user end and 1 low-altitude drone end, the shortcoming is that the user end can receive the real-time communication data stream from the drone end (such as the video data collected by the drone in real time), but may not be able to obtain the front-end data information accumulated and stored in the memory collected by the drone end (the reason is that the drone's onboard power supply may not be able to support the normal return of the drone carrying important collected data information when performing important tasks, and even more seriously, it may lead to data information leakage security risks), resulting in inconsistencies between the user end data and the incremental data stored on the front-end drone, which in turn leads to incomplete grasp of the drone collected data information required by the user end.

[0052] To address this issue, Figure 3 As shown in [2], a three-end (machine) business model consisting of 1 ground end and 2 peer UAV ends is designed. Through the user-end handheld flight control and information management integrated equipment, the flight control and data information transmission communication operations of the UAV end (peer machine 1, peer machine 2) are realized. Regarding the design purpose of data transmission information consistency in the three-end (machine) mode, the main design has four steps, such as Figure 3 As shown in [3].

[0053] Figure 3As described in [3], in the 3-end (machine) mode, the trigger strategy + data synchronization method under "1 ground end - 2 peer drone ends" includes: 1. Trigger strategy: 1 / 2 maximum flight time of the drone system (drone end - peer machine 1) < current (drone end - peer machine 1) remaining flight time + maximum data synchronization time of the drone onboard storage device (compatible with the full data synchronization or time-sharing data synchronization design required by step 2), to ensure that the drone can achieve return; 2. (When there is a need to simultaneously perform multi-dimensional synchronization of a certain observation point, the trigger strategy is as follows: 3. After completing data synchronization, any one drone (or two drones) can return to the user end to synchronize the drone's onboard storage data with the user end for consistency. This completes the data consistency synchronization requirement in the three-end (machine) mode, provided no exceptions occur. In the event of an exception, after completing step 2 or step 3, at any time, if the user end's handheld management device detects that the current drone's flight time is less than 1 / 2 of the required maximum range (i.e., the drone is unable to return normally), the user end will execute a command to clear the drone's onboard storage data to ensure data is not leaked.

[0054] like Figure 4 As shown, a specific embodiment of a method for designing a high-speed communication terminal device suitable for a low-orbit satellite Internet system is disclosed, which mainly includes the following steps:

[0055] S1: Design a high-speed communication terminal device based on the low-orbit satellite Internet system. The system function design mainly includes: low-orbit satellite Internet communication module, low-orbit satellite Internet array antenna module, main control module, and the main connection method between modules, such as Figure 2 shown.

[0056] This module is a subsystem, consisting of the low-altitude module 1-1 and the ground-side module 1-2.

[0057] The low-altitude module 1-1 is mainly composed of a high-speed communication terminal based on the low-orbit satellite Internet system, a UAV handheld flight control, and a CNC information management integrated device, such as Figure 1 shown.

[0058] The ground-side modules 1-2 are mainly composed of drones and systems, airborne high-speed communication terminals based on low-orbit satellite Internet systems, and information collection modules, such as Figure 1 shown.

[0059] At this point, the preparation of the hardware system environment based on the low-orbit satellite Internet system involved in this design plan has been completed, and the working business communication mode of direct connection between the user-end and drone-end system has been adopted.

[0060] S2: Start the high-speed communication terminal system on the ground side (i.e. start Figure 2 The main control module, low-orbit satellite Internet communication module, and low-orbit satellite Internet array antenna module shown in the figure start the digital control information management integrated equipment system, which is composed of Figure 1 The functional module shown in ② is used by users to control the high-speed communication terminal system on the ground through the integrated digital control information management system.

[0061] S3: Start the high-speed communication terminal system carried by UAV-1 at the low altitude end (i.e. start Figure 2 The main control module, low-orbit satellite Internet communication module, and low-orbit satellite Internet array antenna module shown in FIG are formed as shown in FIG. Figure 1 Functional modules shown in ①.

[0062] At this point, the system software, hardware and low-orbit satellite network access service initialization work of this solution is completed.

[0063] S4: After passing Figure 3 After verifying the optional protocol parameter compatibility strategy shown in the figure, a (1 user terminal - 1 drone terminal) low-orbit satellite Internet system (relative to the user terminal - drone direct connection mode) working mode is formed. For the design and function of the optional protocol parameter compatibility strategy, see Figure 3 As described in [1]. At this point, users can start to perform specific services in the 1 user-1 drone satellite communication mode based on the low-orbit satellite communication network environment.

[0064] S5: Based on the 1 user-end-1 drone-end model, a new drone-end peer machine 2 is added to form a 3-end business model (such as Figure 3 As shown in [2], it can realize the flight control and data synchronization consistency transmission control of two UAVs by the user end (3-machine mode).

[0065] S6: Execute the 3-machine mode: trigger strategy + data synchronization method under "1 ground terminal - 2 peer drone terminals", such as Figure 3 As described in [3].

[0066] S61: Execute step S1: trigger the strategy.

[0067] S62: Execute steps S2 and S3, and sequentially perform data synchronization operations between the two drones and between the user terminal and the drone. In the event of an abnormality, execute step S4.

[0068] For the process design of specific steps, see Figure 3 As described in [3].

[0069] In summary, the present invention provides a specific embodiment of a design method for high-speed communication terminal equipment suitable for a low-orbit satellite internet system. The solution first describes the high-speed communication terminal equipment system and application scenarios based on a low-orbit satellite internet system, followed by a design of the device's component systems. Subsequently, to ensure compatibility with satellite-borne base stations and ground core network access and multimedia data service functions from different manufacturers, a compatibility strategy for optional protocol parameters in the satellite communication protocol is designed. Furthermore, based on the 1-user-end-1-drone-end model, a new drone-end peer machine 2 is added to form a 3-end service model. This enables flight control and data synchronization consistency between the user end and the two drone ends (3-machine model). This resolves the inconsistency of data transmission information in the low-orbit satellite internet system environment, extending the 1-ground-end-1-drone-end model to the 1-ground-end-2-drone-end model. Even in abnormal situations, data information security can be guaranteed.

Claims

1. A high-speed communication terminal device suitable for a low-orbit satellite internet system, characterized by: The invention comprises a low-altitude unmanned aerial vehicle (1), a high-speed communication terminal module (2), a low-orbit satellite internet communication constellation (3), and a ground core network module (4); the low-altitude unmanned aerial vehicle (1) and the high-speed communication terminal equipment of the high-speed communication terminal module (2) are respectively connected to the satellite-borne base station of the low-orbit satellite internet communication constellation (3) through a wireless service link, the satellite-borne base station is connected to the ground core network module (4) through a wireless feeder link, and the high-speed communication terminal module (2) completes the access to the low-orbit satellite internet with the help of the low-orbit satellite internet communication constellation (3) and the ground core network module (4), thereby realizing the control and special services of the low-altitude unmanned aerial vehicle (1) by the high-speed communication terminal module (2).

2. The high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 1, characterized in that: The low-altitude UAV (1) includes UAV equipment and an onboard high-speed communication equipment module, which accesses the satellite-borne base station of the low-orbit satellite Internet communication constellation (3) through a service link. The satellite-borne base station is connected to the ground core network of the ground core network module (4) through a feeder link, thereby completing the function of connecting the low-altitude UAV (1) to the low-orbit satellite network.

3. The high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 1, characterized in that: The ground end of the high-speed communication terminal module (2) is composed of a high-speed communication terminal device based on a low-orbit satellite Internet system and a user handheld operating device, which are connected by a wired connection. The user uses the handheld operating device to realize specific business functions of the low-altitude drone module of the low-altitude drone (1).

4. The high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 1, characterized in that: The high-speed communication terminal module (2) comprises a low-orbit satellite internet communication module (2-1), a low-orbit satellite internet array antenna module (2-2) and a main control module (2-3), and realizes data service communication functions with a satellite-borne base station and a core network through a wireless link.

5. The high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 4, characterized in that: The low-orbit satellite Internet communication module (2-1) includes a baseband subsystem, an intermediate frequency subsystem, a control interface and a clock subsystem.

6. The high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 4, characterized in that: The low-orbit satellite internet array antenna module (2-2) includes an antenna array and an antenna control unit. The antenna array communicates with a satellite base station and a core network in the form of a wireless link. The antenna control unit is powered by the antenna control unit and is used to dynamically track overhead low-orbit satellites by controlling the antenna array, and has self-test, monitoring, and logging functions.

7. The high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 4, characterized in that: The main control module (2-3) includes a main control unit, a peripheral interface and an external power supply, and is used to provide the high-speed communication terminal module with a software and hardware basic system environment for system operation, and to respectively supply power to the low-orbit satellite Internet communication module (2-1) and the low-orbit satellite Internet array antenna module (2-2) through the external power supply module.

8. A design method for high-speed communication terminal equipment suitable for low-orbit satellite internet systems, characterized by: Including the startup of the embedded operating system of the high-speed communication terminal equipment, the startup of the high-speed communication terminal subsystem and the execution of the "3-machine mode"; The startup of the embedded operating system of a high-speed communication terminal device includes the following steps: S1: High-speed communication terminal equipment system startup, corresponding to the main control module (2-3), which is responsible for executing the embedded system startup; S2: sequentially load the low-orbit satellite internet communication software system submodule and the low-orbit satellite internet array antenna software system submodule, which are correspondingly run on the low-orbit satellite internet communication module (2-1) and the low-orbit satellite internet array antenna module (2-2); S3: Complete the initialization of the high-speed communication terminal equipment system.

9. The method for designing a high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 8, characterized in that: The high-speed communication terminal subsystem is started, comprising the following steps: S3: The low-orbit satellite internet communication service model for the user-side low-altitude UAV is composed of a high-speed communication terminal subsystem on the user side and an airborne high-speed access terminal subsystem on the low-altitude UAV. S4: Under the control of the user end, the user end can achieve the communication function of collecting and transmitting UAV information data based on the low-orbit satellite Internet system through the low-orbit satellite Internet communication constellation (3) and the ground core network module (4).

10. The method for designing a high-speed communication terminal device suitable for a low-orbit satellite internet system according to claim 8, characterized in that: The execution of the "3-machine mode" includes the following steps: S5: Trigger strategy: The drone system's 1 / 2 maximum range endurance time is less than the current remaining flight time + the maximum data synchronization time of the drone's onboard storage device, ensuring that the drone can return; S6: When there is a need to collect multi-dimensional comparative information of a certain observation point at the same time, a new one is added to the front and the two UAV systems form a communication peer-to-peer network, which also performs data information collection and storage, and performs full data or time-sharing data synchronization; S7: After completing data synchronization, any one drone is supported to return to the user end to synchronize the drone's onboard storage data with the user end for data consistency; in abnormal circumstances, after executing step S6 or step S7, at any time, when the handheld management integrated device on the user end detects that the current drone's flight time is less than 1 / 2 of the time required for the maximum range, the user end executes the command to clear the drone's onboard storage data information.

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