A multi-band and multi-mode shipborne satellite communication in motion integrated system

Abstract

The present invention discloses a multi-band multi-mode shipborne satellite in-motion integrated system, belonging to the technical field of shipborne in-motion communications. The present invention realizes single-frequency time-sharing application and dual-frequency concurrent application of shipborne satellite communication antennas through efficient integration of multi-band antenna radio frequency equipment and integrated feeding and tracking of left and right dual antenna resources; realizes automatic control and efficient operation of earth station system through normalized, intelligent and unified parameter planning and control of all station antennas, channels, switching, calculations, storage and other communication resources; realizes multi-mode flexible application of earth station through hardware unification and software function reconstruction of information processing platform. The present invention has the advantages of flexible integration of multi-frequency and multi-mode, multi-function concurrency and multi-band application, and is suitable for application on different shipborne platforms.

Description

Technical Field

[0001] The present invention relates to the technical field of shipborne satellite in-motion communications, and in particular to a multi-band and multi-mode shipborne satellite in-motion communications integrated system. Background Art

[0002] Traditional shipborne satellite earth station systems are generally designed for fixed satellite networks. For example, the typical maritime satellite shipborne station SAILOR series products can only use fixed satellite communication frequency bands, fixed working mode, and fixed satellite communication services provided by fixed satellite networks. If multiple different satellite network services are needed, multiple earth stations with different frequency bands and functions need to be installed and configured on the ship platform. This greatly wastes the space of the shipborne platform and increases the cost of station deployment.

[0003] Thanks to the rapid development of communication satellite systems, including low-orbit constellation communication satellite systems, the satellite network available for shipborne satellite communications has been continuously expanded, allowing the shipborne satellite earth station system to expand towards multi-band integration and multi-functional applications. However, there is currently no shipborne satellite system with multi-band integration and multi-functional applications in the existing technology. Summary of the invention

[0004] In view of this, the present invention proposes a multi-band multi-mode shipborne satellite mobile communication integrated system. The present invention can flexibly use multi-band satellite antennas to simultaneously establish 1 or 2 satellite links, and can flexibly reconstruct multiple communication waveforms in each satellite link to establish different communication networks, provide flexible carrying of different services, and realize external wide-area, flexible, and mobile satellite communications of ship platforms under the support of limited satellite communication equipment.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A multi-band multi-mode shipborne satellite communication in motion integrated system, comprising two multi-band antenna units, a signal channel switching unit, and a unified information processing platform, wherein the unified information processing platform is used to implement a channel processing function unit, a service processing function unit, and a system control function unit; wherein:

[0007] The multi-band antenna unit includes a transmitter, a low-noise down-converter, a feed source, and a parabolic antenna, which are used for satellite communication beam formation and tracking, as well as communication signal reception and transmission and frequency conversion. Through the integrated design of left and right dual antenna resource feeding and tracking, it supports dual-antenna joint working mode and dual-antenna independent working mode. Among them, the low-noise down-converter integrates a low-noise amplifier and a down-converter, and is installed behind the feed source at the focus of the antenna, and is used to perform low-noise amplification and frequency conversion on the signal received by the parabolic antenna. The transmitter is composed of an up-converter and a power amplifier, which realizes up-conversion and power amplification of the transmitted signal. The feed source is a Ku / Ka dual-band single feed source, which is located at the focus of the parabolic antenna, provides illumination for the parabolic antenna and collects electromagnetic waves reflected by the parabolic antenna. The parabolic antenna is composed of a conductor grid in the shape of a parabola, which is used to reflect the feed source signal.

[0008] The signal channel switching unit is composed of a two-way to multi-way signal exchange matrix, which is used for routing the two-way antenna radio frequency signals and the analog signal of the multi-way channel processing functional unit;

[0009] The channel processing functional unit is implemented based on a unified information processing platform and is used for satellite communication satellite-to-ground link protocol processing, modulation and demodulation, and encoding and decoding processing in various modes;

[0010] Business processing functional unit, implemented based on a unified information processing platform, is used to support rapid routing and exchange of various business data;

[0011] The system control functional unit is implemented based on a unified information processing platform and is used for unified planning, real-time control and status monitoring of communication parameters of the earth station in motion. The communication parameters include satellite information, network mode, operating frequency, communication rate, modulation and coding method, and service interface.

[0012] Furthermore, the unified information processing platform also supports dynamic waveform loading through programmable hardware, thereby realizing real-time adjustment and updating of the channel processing functional unit and the service processing functional unit.

[0013] Furthermore, the working mode of the system control function unit is:

[0014] Step A1, receiving or inputting satellite information used, calculating and generating antenna control parameter configuration items;

[0015] Step A2, receiving or inputting the network mode of this work, planning and generating earth station identification parameter configuration items of user type, user ID, and user authority;

[0016] Step A3, receiving or inputting the working frequency information used, calculating and generating frequency parameter configuration items of the radio frequency equipment and the intermediate frequency equipment;

[0017] Step A4, receiving or inputting the communication rate information used, calculating and generating the transmission rate parameter configuration items of the carrier rate, coding rate, symbol rate, and service interface rate;

[0018] Step A5, receiving or inputting the modulation and coding mode information used, calculating and generating the coding and modulation parameter configuration items of the channel processing functional unit;

[0019] Step A6, receiving or inputting information related to the service interface used, calculating and generating network parameter configuration items of the service processing function unit;

[0020] Step A7, sending the generated configuration file to the relevant equipment monitoring units of the earth station for execution;

[0021] Step A8, confirming the execution result through the feedback information of each relevant equipment monitoring unit, and collecting information from each relevant equipment monitoring unit to present the comprehensive working status information of the whole station.

[0022] Furthermore, in the dual-antenna independent working mode, the working mode of a single antenna is as follows:

[0023] Step 101, obtaining the communication satellite information used from the outside;

[0024] Step 102, based on the communication satellite information and the ship platform attitude information, the frequency band channel selection, polarization mode, tracking mode, initial azimuth angle, initial pitch angle, and initial polarization angle of each antenna are calculated to form an antenna parameter configuration set;

[0025] Step 103, sending the antenna parameter configuration set to each execution unit of the antenna, starting to execute satellite capture, and entering the next tracking process after successful capture, otherwise repeating this step;

[0026] Step 104, according to the ship platform attitude information, continue to accurately point and track the communication satellite. If the tracking fails, jump to step 103;

[0027] The dual-antenna joint working mode works as follows:

[0028] Step 201, obtaining the communication satellite information used from the outside;

[0029] Step 202, according to the communication satellite information and the ship platform attitude information, the frequency band channel selection, polarization mode, tracking mode, initial azimuth angle, initial pitch angle, and initial polarization angle of the two antennas are calculated respectively to form an antenna parameter configuration set, and the two antennas are set to "working" and "ready" modes respectively;

[0030] Step 203, after receiving the antenna parameter configuration set, each execution unit of the antenna in the "ready" working mode starts to perform satellite pre-capture. Once it switches to "working", step 204 is executed;

[0031] Step 204, the antenna in the "working" mode executes steps 103, 104, and 105 in sequence; during operation, if a command to change the antenna working mode is received due to a change in the satellite or platform attitude, then go to step 203.

[0032] Furthermore, the unified information processing platform adopts a 4U chassis VPX architecture unified open hardware platform, including an intermediate frequency signal processing module, a baseband signal module, a protocol analysis and processing module, and an application software module; the channel processing function is completed by filtering, sampling, storing, modulating and demodulating, and encoding and decoding the signal, thereby realizing the channel processing functional unit; the fast routing and switching function of the data is completed by data encapsulation and analysis processing, thereby realizing the business processing functional unit; the user application function is completed by calculation and control, thereby realizing the system control functional unit.

[0033] Furthermore, the unified information processing platform interacts with the reconstruction instruction and receives and loads the programmable hardware image through the Ethernet port, and the reconstruction method of the channel processing function unit, the service processing function unit, and the system control function unit is:

[0034] Step B1: The user initiates a service application based on his / her needs;

[0035] Step B2, the system control function unit analyzes the user application and determines whether the application is legal, that is, whether the hardware resources meet the requirements. If not, a rejection instruction is sent to the user; if satisfied, step B3 is executed;

[0036] Step B3, the system control function unit queries the corresponding hardware resources and functional component resources, and determines whether the current resources meet the requirements of the user; if so, a function configuration file is generated; if not, a rejection instruction is sent to the user;

[0037] Step B4, the system control function unit analyzes the function configuration file, and searches for the programmable hardware image locally according to the function configuration file. If the programmable hardware image is found locally, step B8 is executed; if there is no programmable hardware image locally, an instruction is sent to the user to request to download the corresponding image from the network, and step B5 is entered;

[0038] Step B5, the user specifies the server address and path for downloading the image, and informs the system control function unit;

[0039] Step B6, the system control function unit logs in to the server as a client through the FTP protocol and downloads the programmable hardware image;

[0040] Step B7, after the system control function unit downloads the programmable hardware image, it checks the integrity and legality of the image. If the image is complete and legal, it executes step B8; if the image is incomplete, it deletes the image and re-executes step B6; if the image is illegal, it deletes the image and sends a warning instruction to the user;

[0041] Step B8, the system control function unit allocates the required hardware resources and functional component resources, and uses the programmable hardware image to perform software reconstruction;

[0042] Step B9: After the software is reconstructed successfully, the system control function unit sends a reconstructed successful instruction to the user.

[0043] Compared with the background technology, the present invention has the following advantages:

[0044] 1. The present invention realizes the transformation of the shipborne satellite earth station system in motion from "single station single frequency single function" to "single station single frequency multi-function" and "single station multi-frequency multi-function".

[0045] 2. The present invention can flexibly use multi-band satellite antennas to establish 1 or 2 satellite links at the same time, and can flexibly reconstruct a variety of communication waveforms in each satellite link to establish different communication networks and provide different business services. The business can be flexibly carried, thereby realizing external wide-area, flexible and mobile satellite communications of the ship platform with the support of limited satellite communication equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 1 is a schematic diagram of a multi-band multi-mode shipborne satellite in-motion integrated system in an embodiment of the present invention.

[0047] Figure 2 It is a working flow chart of the system control functional unit in an embodiment of the present invention.

[0048] Figure 3 It is a flow chart of the integrated control of dual-antenna feeding and tracking in an embodiment of the present invention.

[0049] Figure 4 It is a flow chart of functional software reconstruction loading in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0051] A multi-band, multi-mode shipborne satellite in-motion integrated system, which is used to establish wide-area information interconnection with the outside world through multiple satellite communication links. Figure 1As shown, the system includes two multi-band antenna units A and B, a signal channel switching unit, and a unified information processing platform. The two multi-band antenna units A and B are used to receive two signals A and B. The unified information processing platform is used to implement n channel processing functional units, n business processing functional units, and system control functional units, thereby providing n functional services to the outside, n≥1.

[0052] The following is a detailed description of each unit:

[0053] Multi-band antenna unit: Based on the efficient integrated design of multi-band antenna RF equipment, it is mainly composed of a transmitter, LNB (low noise downconverter), feed and parabolic antenna. The LNB integrates a low noise amplifier and a downconverter and is installed behind the feed at the focus of the antenna, which is used to low-noise amplify and frequency convert the signal received by the parabolic antenna; the transmitter is composed of an upconverter and a power amplifier, which mainly realizes the upconversion and power amplification of the transmitted signal; the feed is a Ku / Ka dual-band single feed, which is located at the focus of the parabolic antenna, provides effective illumination for the parabolic antenna and collects the electromagnetic waves reflected by the parabolic antenna. The parabolic antenna is composed of a conductor grid in the shape of a parabola, which is used to reflect the feed signal. The multi-band antenna unit is mainly used for the formation and tracking of satellite communication beams, as well as the transmission and reception and frequency conversion of communication signals. Through the integrated design of feeding and tracking of the left and right dual antenna resources, it can support the dual antenna joint working mode and the dual antenna independent working mode.

[0054] Signal channel switching unit: It is composed of a two-way to multi-way signal exchange matrix, which is used for routing the two-way antenna RF signals and the analog signals of the multi-way channel processing functional units.

[0055] Unified information processing platform: Adopting a unified open hardware platform with 4U chassis VPX architecture, it includes intermediate frequency signal processing module, baseband signal module, protocol analysis processing module and application software module. The channel processing function is completed through signal filtering, sampling, storage, modulation and demodulation, and encoding and decoding to realize the channel processing functional unit; the fast routing and switching functions of data are completed through data encapsulation and analysis processing to realize the business processing functional unit; the user application function is completed through calculation and control to realize the system control functional unit. At the same time, the platform supports dynamic waveform loading through programmable hardware, realizes the real-time adjustment and update functions of the channel processing functional unit and the business processing functional unit, and meets various task requirements.

[0056] Channel processing functional unit: implemented based on a unified information processing platform, used for satellite communication satellite-to-ground link protocol processing, modulation and demodulation, and encoding and decoding processing under various modes.

[0057] Business processing functional unit: implemented based on a unified information processing platform, used to support rapid routing and exchange of various business data.

[0058] System control functional unit: Based on a unified information processing platform, it is used to plan, control and monitor the communication parameters of the earth station in motion, including satellite information, network mode, working frequency and rate, modulation and coding method, service interface, etc. The working mode of the system control functional unit is as follows: Figure 2 As shown, the main steps are as follows:

[0059] Step A1, receiving or inputting satellite information used, calculating and generating antenna control parameter configuration items;

[0060] Step A2, receiving or inputting the network mode of this work, planning and generating earth station identification parameter configuration items such as user type, user ID, user authority, etc.;

[0061] Step A3, receiving or inputting the working frequency information used, calculating and generating frequency parameter configuration items such as radio frequency equipment and intermediate frequency equipment;

[0062] Step A4, receiving or inputting the communication rate information used, calculating and generating transmission rate parameter configuration items such as carrier rate, coding rate, symbol rate, and service interface rate;

[0063] Step A5, receiving or inputting the modulation and coding mode information used, calculating and generating the coding and modulation parameter configuration items of the channel processing functional unit;

[0064] Step A6, receiving or inputting information related to the service interface used, calculating and generating network parameter configuration items of the service processing function unit;

[0065] Step A7, the generated configuration item file is sent to the relevant equipment monitoring units of the earth station for execution;

[0066] Step A8, confirm the execution result through the feedback information of each relevant equipment monitoring unit, and control the parameter changes and corrections in real time as needed; and collect information from each relevant equipment monitoring unit to present the comprehensive working status information of the whole station.

[0067] This system adopts the integrated design of dual antenna resource feeding and tracking on both sides of the port and starboard, which can support dual antenna coordinated working mode and dual antenna independent working mode. The control process is as follows: Figure 3 In the dual-antenna independent working mode, the working process of a single antenna is as follows:

[0068] Step 101, obtaining the communication satellite information used from the outside;

[0069] Step 102, based on the communication satellite information and the ship platform attitude information, the frequency band channel selection, polarization mode, tracking mode, initial azimuth angle / pitch angle / polarization angle, etc. of each antenna are calculated to form an antenna parameter configuration set;

[0070] Step 103: Parameters are sent to each execution unit of the antenna to start satellite capture. If the capture is successful, the tracking process will proceed to the next step. Otherwise, this step will be repeated.

[0071] Step 104, based on the ship platform attitude information, continue to perform precise pointing and tracking of the communication satellite; if tracking fails, jump to step 103.

[0072] The workflow in dual antenna cooperation mode is as follows:

[0073] Step 201, obtaining the communication satellite information used from the outside;

[0074] Step 202, according to the communication satellite information and the ship platform attitude information, the frequency band channel selection, polarization mode, tracking mode, initial azimuth angle / pitch angle / polarization angle, etc. of the two antennas are calculated respectively to form an antenna parameter configuration set, and the "working" and "ready" modes are set for the two antennas respectively;

[0075] Step 203, after receiving the parameter configuration, each execution unit of the antenna in the "ready" working mode starts to perform satellite pre-capture, and once switched to "working", the next step is executed;

[0076] Step 204, the antenna in the "working" working mode executes steps 103, 104, and 105 in sequence; during work, if a command to change the antenna working mode is received due to a change in the satellite or platform attitude, then go to step 203.

[0077] The unified information processing platform supports software reconstruction. The channel processing functional unit, business processing functional unit, and system control functional unit are implemented based on the unified information processing platform, so these three functional units can all achieve software reconstruction. The unified information processing platform uses a 4U chassis VPX architecture to unify the open hardware architecture and standard software system. The hardware architecture uses the CPU processor and programmable hardware as core components; the standard software system is to deploy the μcLinux operating system on the CPU processor and run the application, and there is a dedicated interface between the application and the programmable hardware. At the same time, the unified information processing platform provides a standard Ethernet port to the outside world, which can realize the interaction with external network data, including the interaction of reconstruction instructions and the reception and loading of programmable hardware images.

[0078] like Figure 4 As shown, the main steps of the software reconstruction process are as follows:

[0079] Step B1: The user initiates a service application based on his / her needs;

[0080] Step B2: The system control function unit analyzes the user's application and determines whether the application is legal, that is, whether the hardware resources meet the requirements. If not, a rejection instruction is sent to the user; if satisfied, the next step is executed;

[0081] Step B3, the system control function unit queries the corresponding hardware resources and functional component resources and determines whether the current resources meet the requirements of the user; if so, a function configuration file is generated; if not, a rejection instruction is sent to the user;

[0082] Step B4: the system control function unit analyzes the function configuration file and searches for the programmable hardware image locally according to the function configuration file. If the programmable hardware image is found, step B8 is executed; if the target programmable hardware image is not available locally, an instruction is sent to the user to request to download the corresponding image from the network;

[0083] Step B5, the user specifies the server address and path for downloading the image and informs the system control function unit;

[0084] Step B6, the system control function unit logs in to the server as a client through the FTP protocol to download the programmable hardware image;

[0085] Step B7, after the system control function unit downloads the image, it checks the integrity and legality of the image. If the image is complete and legal, it executes step B8; if the image is incomplete, it deletes the image and re-executes step B6; if the image is illegal, it deletes the image and sends a warning instruction to the user;

[0086] Step B8, the system control function unit allocates the required hardware resources and functional component resources, and reconstructs its software using the image;

[0087] Step B9: After the software is reconstructed successfully, the system control function unit sends a reconstructed successful instruction to the user.

[0088] The present invention realizes single-frequency time-sharing application and dual-frequency concurrent application of shipborne satellite communication antennas through efficient integration of multi-band antenna radio frequency equipment and integrated feeding and tracking of left and right dual antenna resources; realizes automatic control and efficient operation of the earth station system through normalized, intelligent and unified parameter planning and control of communication resources such as antennas, channels, switching, computing and storage of the entire station; and realizes multi-mode flexible application of the earth station through hardware unification and software function reconstruction of the information processing platform.

[0089] In summary, the present invention maximizes the system integration of shipborne satellite earth station in motion through antenna RF multi-band integration, whole-station intelligent planning and control, information processing platform unification and function reconstruction method. The present invention has the advantages of multi-frequency and multi-mode flexible integration, multi-function concurrency and multi-band application, and is suitable for different shipborne platform applications.

Claims

1. A multi-band multi-mode shipborne satellite mobile communication integrated system, characterized in that: It includes two multi-band antenna units, a signal channel switching unit, and a unified information processing platform, wherein the unified information processing platform is used to implement a channel processing function unit, a service processing function unit, and a system control function unit; wherein: The multi-band antenna unit includes a transmitter, a low-noise down-converter, a feed source, and a parabolic antenna, which are used for satellite communication beam formation and tracking, as well as communication signal reception and transmission and frequency conversion. Through the integrated design of left and right dual antenna resource feeding and tracking, it supports dual-antenna joint working mode and dual-antenna independent working mode. Among them, the low-noise down-converter integrates a low-noise amplifier and a down-converter, and is installed behind the feed source at the focus of the antenna, and is used to perform low-noise amplification and frequency conversion on the signal received by the parabolic antenna. The transmitter is composed of an up-converter and a power amplifier, which realizes up-conversion and power amplification of the transmitted signal. The feed source is a Ku / Ka dual-band single feed source, which is located at the focus of the parabolic antenna, provides illumination for the parabolic antenna and collects electromagnetic waves reflected by the parabolic antenna. The parabolic antenna is composed of a conductor grid in the shape of a parabola, which is used to reflect the feed source signal. The signal channel switching unit is composed of a two-way to multi-way signal exchange matrix, which is used for routing the two-way antenna radio frequency signals and the analog signal of the multi-way channel processing functional unit; The channel processing functional unit is implemented based on a unified information processing platform and is used for satellite communication satellite-to-ground link protocol processing, modulation and demodulation, and encoding and decoding processing in various modes; Business processing functional unit, implemented based on a unified information processing platform, is used to support rapid routing and exchange of various business data; The system control functional unit is implemented based on a unified information processing platform and is used to plan, control in real time and monitor the status of the unified communication parameters of the earth station in motion. The communication parameters include the satellite information used, network mode, operating frequency, communication rate, modulation and coding method, and service interface. The working mode of the system control functional unit is: Step A1, receiving or inputting satellite information used, calculating and generating antenna control parameter configuration items; Step A2, receiving or inputting the network mode of this work, planning and generating earth station identification parameter configuration items of user type, user ID, and user authority; Step A3, receiving or inputting the working frequency information used, calculating and generating frequency parameter configuration items of the radio frequency equipment and the intermediate frequency equipment; Step A4, receiving or inputting the communication rate information used, calculating and generating the transmission rate parameter configuration items of the carrier rate, coding rate, symbol rate, and service interface rate; Step A5, receiving or inputting modulation and coding scheme information used, calculating and generating coding and modulation parameter configuration items of the channel processing functional unit; Step A6, receiving or inputting information related to the service interface used, calculating and generating network parameter configuration items of the service processing function unit; Step A7, sending the generated configuration file to the relevant equipment monitoring units of the earth station for execution; Step A8, confirming the execution result through the feedback information of each relevant equipment monitoring unit, and collecting information from each relevant equipment monitoring unit to present the comprehensive working status information of the whole station; In dual-antenna independent working mode, a single antenna works as follows: Step 101, obtaining the communication satellite information used from the outside; Step 102, based on the communication satellite information and the ship platform attitude information, the frequency band channel selection, polarization mode, tracking mode, initial azimuth angle, initial pitch angle, and initial polarization angle of each antenna are calculated to form an antenna parameter configuration set; Step 103, sending the antenna parameter configuration set to each execution unit of the antenna, starting to execute satellite capture, and entering the next tracking process after successful capture, otherwise repeating this step; Step 104, according to the ship platform attitude information, continue to accurately point and track the communication satellite. If the tracking fails, jump to step 103; The dual-antenna joint working mode works as follows: Step 201, obtaining the communication satellite information used from the outside; Step 202, according to the communication satellite information and the ship platform attitude information, the frequency band channel selection, polarization mode, tracking mode, initial azimuth angle, initial pitch angle, and initial polarization angle of the two antennas are calculated respectively to form an antenna parameter configuration set, and the two antennas are set to "working" and "ready" modes respectively; Step 203, after receiving the antenna parameter configuration set, each execution unit of the antenna in the "ready" working mode starts to perform satellite pre-capture. Once switched to "working", step 204 is executed; Step 204, the antenna in the "working" mode executes steps 103, 104, and 105 in sequence; during operation, if a command to change the antenna working mode is received due to a change in the satellite or platform attitude, then the process proceeds to step 203.

2. The multi-band multi-mode shipborne satellite mobile communication integrated system according to claim 1, characterized in that: The unified information processing platform also supports dynamic waveform loading through programmable hardware, thereby realizing real-time adjustment and updating of the channel processing functional unit and the business processing functional unit.

3. The multi-band multi-mode shipborne satellite communication in motion integrated system according to claim 1, characterized in that: The unified information processing platform adopts a 4U chassis VPX architecture unified open hardware platform, including intermediate frequency signal processing module, baseband signal module, protocol analysis and processing module and application software module; it completes the channel processing function through signal filtering, sampling, storage, modulation and demodulation, and encoding and decoding to realize the channel processing functional unit; it completes the fast routing and switching function of data through data encapsulation and analysis processing to realize the business processing functional unit; it completes the user application function through calculation and control to realize the system control functional unit.

4. The multi-band multi-mode shipborne satellite communication in motion integrated system according to claim 1, characterized in that: The unified information processing platform interacts with the reconstruction instructions and receives and loads the programmable hardware image through the Ethernet port. The reconstruction method of the channel processing function unit, the service processing function unit, and the system control function unit is as follows: Step B1: The user initiates a service application based on his / her needs; Step B2, the system control function unit analyzes the user application and determines whether the application is legal, that is, whether the hardware resources meet the requirements. If not, a rejection instruction is sent to the user; if satisfied, step B3 is executed; Step B3, the system control function unit queries the corresponding hardware resources and functional component resources, and determines whether the current resources meet the requirements of the user; if so, a function configuration file is generated; if not, a rejection instruction is sent to the user; Step B4, the system control function unit analyzes the function configuration file, and searches for the programmable hardware image locally according to the function configuration file. If the programmable hardware image is found locally, step B8 is executed; if there is no programmable hardware image locally, an instruction is sent to the user to request to download the corresponding image from the network, and step B5 is entered; Step B5, the user specifies the server address and path for downloading the image, and informs the system control function unit; Step B6, the system control function unit logs in to the server as a client through the FTP protocol and downloads the programmable hardware image; Step B7, after the system control function unit finishes downloading the programmable hardware image, it checks the image integrity and legality. If the image is complete and legal, it executes step B8; if the image is incomplete, it deletes the image and re-executes step B6; If the image is illegal, the image will be deleted and a warning instruction will be sent to the user; Step B8, the system control function unit allocates the required hardware resources and functional component resources, and uses the programmable hardware image to perform software reconstruction; Step B9: After the software is reconstructed successfully, the system control function unit sends a reconstructed successful instruction to the user.

Images