Railway vehicle-ground millimeter wave rapid dumping method and system based on beidou position information

Abstract

The application provides a railway train-ground millimeter wave fast dumping method and system based on Beidou position information. The method comprises the following steps: a train receives a radio frequency signal sent by a Beidou satellite through a vehicle-mounted subsystem, calculates current position information of the train according to the radio frequency signal, and sends the current position information to a ground subsystem; the ground subsystem calculates a real-time distance between the train and a coverage range boundary of a base station according to received information and sends the real-time distance back to the vehicle-mounted subsystem; the vehicle-mounted subsystem calculates a remaining time for the train to enter the coverage range according to the real-time distance and a current driving speed of the train, compares the remaining time with an estimated preparation time required for completing data transmission preparation work, and obtains a data transmission preparation opportunity; at the opportunity, the train performs the preparation work of data transmission and a network access request in parallel; and the data transmission is started immediately when the train successfully accesses the base station network. The application can reduce the waiting time of the train after entering the coverage range of the base station, and improve the vehicle-mounted data backhaul quantity and response speed.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a method and system for rapid millimeter-wave data transfer between railway vehicles and the ground based on BeiDou location information. Background Technology

[0002] As a vital national infrastructure, railway transportation has always been a key driver of economic and social development. As a modern mode of transportation, it plays a crucial and positive role in national economic development and meeting people's needs, serving as a link between social production, distribution, exchange, and consumption. Railway freight occupies a significant position in the entire transportation sector and will remain the mainstay of freight transport both now and in the future. It features high speed, large capacity, low energy consumption, and stable transport capacity, enabling the rapid, safe, and punctual transport of large quantities of goods. Compared to other modes of transportation, it possesses extremely strong large-scale transport capabilities, significantly improving transport efficiency and reducing the unit cost of transporting goods.

[0003] Large freight railway stations transmit massive amounts of data back to the ground, including a large volume of monitoring, diagnostic, and video surveillance data generated during operation by systems such as the locomotive onboard safety protection system (6A) and the train operation monitoring and recording device (LKJ). Staff need to transfer and store this data when vehicles return to the depot, and combine it with a ground-based intelligent diagnostic system to analyze historical data for operational status, inertial faults, and patterns of occasional faults. Due to the sheer volume of data, traditional station wireless communication is limited by factors such as frequency, stability, and bandwidth, making it difficult to meet the demand for rapid data transmission and fast, complete download within the station. Currently, vehicle-to-ground data transfer methods include manual copying and WiFi network downloading. Manual copying involves maintenance personnel periodically boarding the train to copy onboard video data using hard drives; its disadvantages include long transfer times, low efficiency, and poor timeliness. WiFi network downloading utilizes unauthorized WiFi networks for data transfer; its disadvantages include proprietary, non-standard technology, lack of scalability, slow transmission speeds, and insecurity, making it vulnerable to virus attacks and data theft. Therefore, both manual copying and WiFi network-based data transfer methods have limitations and cannot meet operational needs. There is an urgent need for new standardized technologies to bridge the "last mile" of train-to-ground data transfer, enabling fast and efficient onboard data transmission, ensuring safe train operation, and reducing train stop times at stations. This is also a problem that freight railways urgently need to solve.

[0004] One feasible approach is to adopt 5G millimeter-wave technology. Millimeter-wave communication technology can complement traditional wireless communication systems in terms of transmission rate and application scenarios, providing an intelligent solution of "large capacity + high speed + localization." This solves the problem of rapid backhaul of large data volumes, requiring no manual intervention throughout the transfer process, ensuring data integrity, security, and reliability, and meeting operational safety requirements. 5G millimeter-wave technology has the following advantages: 1. Extremely large spectrum bandwidth: High peak and average rates, ultra-large capacity, and capable of backhaul; 2. Extremely low latency: Millisecond-level low latency, supporting industrial IoT, AR / VR, real-time computing, and other services; 3. High equipment integration: Miniaturized and micro-miniaturized base stations, lower energy consumption, and a more green and low-carbon approach.

[0005] Currently, China's rail transit industry is vigorously promoting the research and application of vehicle-to-ground data transfer systems. For example, in 2023, a railway company launched a high-speed vehicle-to-ground data transfer project based on WiFi 5. Employing technologies such as beamforming, multiple antennas, and beam tracking, each transfer device achieved a performance exceeding 500Mbps, automating locomotive data transfer and reducing the average locomotive video transfer time to 20 minutes after storage and preparation, significantly improving the timeliness of data analysis. Another example is the first domestic intelligent shunting system for heavy-haul railways, developed under the leadership of a certain company, which officially went into operation in 2025. Based on 5G and BeiDou navigation-based automatic shunting technology, and relying on centimeter-level positioning and millisecond-level transmission networks, this system enables locomotives to autonomously complete key operations such as acceleration / deceleration control and parking alignment, reducing train operation time by 20%.

[0006] The international rail transit industry has also conducted extensive research on the application of vehicle-to-ground data transfer communication technologies. For example, in Europe, vehicle-to-ground communication technology based on the Future Railway Mobile Communication System (FRMCS), promoted and developed under the leadership of the International Union of Railways (UIC), is gradually replacing the traditional GSM-R. FRMCS's higher carrying flexibility improves the quality of vehicle-to-ground data transfer communication. Japan uses WiMAX technology to empower its railway vehicle-to-ground communication system. The French National Railway Company (SNCF) has developed driverless technology for passenger and freight trains, using satellite communication and 4G mobile communication technologies to establish a high-capacity communication link between the train and the ground, transmitting information such as train status, real-time video, train positioning, and locomotive cab audio, while ensuring low latency and high quality data transfer between the vehicle and the ground.

[0007] With the deepening research into vehicle-to-ground data transfer communication technology, the integration of millimeter wave technology with vehicle-to-ground data transfer scenarios has also been studied in the industry. For example, in 2019, the "AirFlash" 5G millimeter wave vehicle-to-ground high-speed data transfer solution was introduced into the daily operations of a locomotive depot. This solution uses the 5G (NR) standard and the unlicensed frequency band. In the locomotive maintenance yard of this depot, efficient data transfer of Harmony-type electric locomotives was achieved, completing the transfer of 15.6GB of video data in less than 90 seconds. Tests showed that the locomotive and the ground could achieve high-speed wireless communication of 1.5Gbps, a 10-fold increase in efficiency compared to manual data transfer. Following this, a company launched a 5G intelligent end-to-end data transfer and analysis solution, reducing the data transfer time to 90 seconds, approximately 27 times faster than manual data transfer.

[0008] It is evident that both domestic and international research has been conducted on the application of railway vehicle-to-ground data transfer technology. Domestically, the application of millimeter-wave wireless vehicle-to-ground data transfer in railways has begun to be deployed. However, current millimeter-wave wireless vehicle-to-ground data transfer still requires data transmission preparation to begin only after the train has connected to the network, which cannot effectively reduce the transmission waiting time after the train enters the network or improve data transmission efficiency. Therefore, to reduce the waiting time of existing locomotive millimeter-wave vehicle-to-ground data transfer and solve problems such as low transfer efficiency and poor timeliness, it is urgent to design a high-efficiency 5G millimeter-wave vehicle-to-ground data transfer method. Summary of the Invention

[0009] The purpose of this invention is to provide a method and system for rapid millimeter-wave data transfer between railway vehicles and the ground based on BeiDou location information. This aims to solve the problems of existing millimeter-wave railway vehicle-to-ground data transfer systems, which require waiting time before data transfer, have poor timeliness, limit the amount of data transmitted, and cannot adapt to the massive data scenarios of future railways.

[0010] This invention provides a rapid millimeter-wave data transfer method for railway vehicles based on BeiDou location information, comprising: The timing of data transmission preparation before the train enters the coverage area of ​​the millimeter-wave ground base station is determined based on the received real-time BeiDou location information. During the data transmission preparation period, the train performs data transmission preparation work and network access request in parallel. When the train successfully accesses the millimeter-wave ground base station network based on the BeiDou real-time location information, it immediately initiates the millimeter-wave transmission of the prepared data.

[0011] This invention provides a millimeter-wave vehicle-to-ground data transfer system based on BeiDou location information, comprising: Vehicle-mounted subsystems and ground subsystems; The vehicle-mounted subsystem includes: The vehicle-mounted ephemeris receiver is used to receive radio frequency signals transmitted by BeiDou satellites; A millimeter-wave vehicle-mounted radio, used to establish a millimeter-wave communication link with the ground subsystem; The Beidou positioning module is connected to the vehicle-mounted ephemeris receiver and is used to calculate the real-time location information of the train based on the radio frequency signal. The vehicle gateway, connected to the vehicle storage device and the millimeter-wave vehicle radio, is used to perform data reading and preparation. The vehicle controller is communicatively connected to the Beidou positioning module and the vehicle gateway, and is used to determine the data transmission preparation time based on the real-time location information, and control the vehicle gateway and the millimeter-wave vehicle radio to perform corresponding operations. The ground subsystem includes: A millimeter-wave ground base station for communicating with the millimeter-wave vehicle-mounted radio; The ground gateway, connected to the ground storage device and the millimeter-wave ground base station, is used to receive and process vehicle-mounted data.

[0012] This invention also provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the above-described railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information.

[0013] This invention also provides a computer-readable storage medium storing an information transmission implementation program. When the program is executed by a processor, it implements the steps of the above-described railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information.

[0014] The following beneficial effects can be achieved by adopting the embodiments of the present invention: The embodiments of the present invention propose a railway vehicle-to-ground millimeter wave rapid data transfer method based on Beidou location information, so as to reduce the waiting time after the train enters the coverage area of ​​the millimeter wave base station and improve the amount of onboard data backhaul and response speed. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of a railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the interface of the vehicle-to-ground transfer system based on BeiDou positioning information according to an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the coverage of the millimeter-wave communication system and the mid-to-low frequency wireless communication system according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the railway vehicle-to-ground millimeter-wave rapid data transfer process based on BeiDou location information according to an embodiment of the present invention; Figure 5 This is a flowchart of the steps of a conventional wireless vehicle-to-ground data transfer method according to an embodiment of the present invention; Figure 6 This is a flowchart illustrating the steps of a railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information according to an embodiment of the present invention. Figure 7 This is a schematic diagram of a millimeter-wave vehicle-to-ground data transfer system based on BeiDou location information, according to an embodiment of the present invention. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0018] Method Implementation Examples According to embodiments of the present invention, a rapid millimeter-wave data transfer method for railway vehicles based on BeiDou location information is provided. Figure 1 This is a flowchart of a railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information, according to an embodiment of the present invention. Figure 1 As shown, the railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information according to an embodiment of the present invention specifically includes: Step S101, based on the received BeiDou real-time location information, determines the data transmission preparation timing before the train enters the coverage area of ​​the millimeter-wave ground base station, specifically including: The train receives radio frequency signals sent by Beidou satellites through the onboard ephemeris receiver in the onboard subsystem. The Beidou positioning module calculates the train's current position information based on the radio frequency signals and sends the train's current position information to the millimeter-wave ground base station in the ground subsystem through the millimeter-wave onboard radio. The millimeter-wave ground base station calculates the real-time distance between the train and the boundary of the base station's coverage area based on the received position information and sends the real-time distance back to the onboard subsystem. The onboard controller in the vehicle subsystem calculates the remaining time for the train to enter the coverage area based on the real-time distance and the train's current speed, and compares the remaining time with the estimated preparation time required to complete the data transmission preparation. When the remaining time is less than or equal to the estimated preparation time, the current moment is determined to be the time to prepare for data transmission.

[0019] The estimated preparation time is determined based on the amount of data to be transferred and the data reading rate of the vehicle-mounted equipment. Furthermore, the estimated preparation time can be dynamically adjusted based on historical data from data dumping tasks. This means the system also possesses self-learning and adaptive capabilities, no longer rigidly relying on fixed values ​​or instantaneous calculations. It can continuously optimize the prediction of the "estimated preparation time" by analyzing past dump records, making it more closely aligned with actual operational conditions. After each data dumping task is completed, the system records the actual key parameters of that task. Before the next task begins, the system calculates the estimated preparation time using the amount of data to be dumped and the data reading rate of the onboard equipment, and also refers to this historical data, dynamically adjusting the "estimated preparation time" for the current task through specific strategies.

[0020] The historical experience data that can be recorded includes, but is not limited to: 1. Historical actual preparation time: the actual time spent from the start of reading data to the completion of preparation in multiple past dump tasks; 2. Historical data volume: the amount of data successfully dumped in past dump tasks; 3. Historical disk read rate: the average data read rate measured in past tasks; 4. Task metadata: such as train model, on-board storage device model, time period of dump, etc.

[0021] Step S102: During the data transmission preparation period, the train performs data transmission preparation and network access request in parallel. The data transmission preparation work includes at least one of the following operations: reading the data to be transferred from the vehicle storage device, encapsulating or processing the data to be transferred according to a protocol, and caching the data to be transferred into a transmission buffer.

[0022] Step S103: When the train successfully accesses the millimeter-wave ground base station network based on the BeiDou real-time location information, the millimeter-wave transmission of the prepared data is immediately initiated.

[0023] The following describes in detail the above-mentioned technical solution of the present invention with reference to the specific circumstances of the railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information in the embodiments of the present invention.

[0024] I. Interface Design of Vehicle-to-Ground Transfer System Based on BeiDou Information The BeiDou-based vehicle-to-ground data transfer system uses BeiDou satellites for precise train positioning. The ground-based system determines when the train is ready to transmit data by observing the distance between the train and the ground base station. Data exchange between the ground and the train is then achieved via millimeter-wave communication. The system includes millimeter-wave ground base stations and millimeter-wave onboard radios, providing high-speed vehicle-to-ground transmission of data for train monitoring, diagnostics, and video surveillance. Figure 2 As shown.

[0025] The millimeter-wave vehicle-mounted radio and the millimeter-wave ground base station use a dedicated communication protocol for high-speed wireless communication. The millimeter-wave ground base station interacts with ground storage devices or other equipment through a ground gateway, while the millimeter-wave vehicle-mounted radio interacts with the vehicle-mounted storage device through an onboard gateway. It also receives radio frequency signals transmitted by satellites through an onboard ephemeris receiver to calculate the train's position.

[0026] In this embodiment of the invention, the satellite transmits its ephemeris and coordinate information to a receiver on the ground train via radio frequency signals. The train receives the data, performs coordinate system transformation, calculates its own coordinates, and transmits this coordinate information to the ground base station via an air interface. The ground station calculates the train-to-ground distance based on the received coordinate information. During train operation, the collected 6A video data can be extracted to the onboard storage device via an open interface or protocol. When the train detects that the millimeter-wave onboard radio has connected to the millimeter-wave ground base station based on the train-to-ground distance, it automatically activates the data backhaul mode and begins transmitting data to the ground storage device. The ground storage device then transmits train control, monitoring, and detection data to the corresponding management platform via a ground gateway.

[0027] Millimeter-wave communication systems can also be paired with mid- and low-frequency band systems to achieve cross-coverage and provide point-based millimeter-wave enhancement in specific areas. This fully leverages the long-distance, wide-coverage characteristics of mid- and low-frequency bands and the high bandwidth and high-speed characteristics of millimeter waves, complementing each other to solve the problems of insufficient transmission capacity in mid- and low-frequency bands and insufficient transmission distance in millimeter waves. For example, after a train calculates its own location information, because the amount of BeiDou location information data is relatively small, it can transmit the BeiDou location information back to the ground base station through mid- and low-frequency bands. The system coverage is illustrated in the diagram below. Figure 3 As shown.

[0028] II. Millimeter-wave vehicle-to-ground data transfer process based on BeiDou location information Based on the interface of the vehicle-to-ground data transfer system using BeiDou information, a millimeter-wave vehicle-to-ground data transfer process based on BeiDou location information is further proposed, as follows: Figure 4 As shown.

[0029] Existing millimeter-wave wireless vehicle-to-ground data transfer solutions typically lack the network access range S1 of the ground base station, i.e., the coverage area of ​​the millimeter-wave base station (the distance from which automatic download of onboard data can be achieved via wireless network). The train continuously initiates network access requests. At time T1, the train reaches a distance of S1 from station S1 and successfully accesses the network. At this point, the onboard gateway begins reading data from the onboard storage device's disk and initiates various transmission preparation tasks. At time T2, it begins transmitting onboard data back. When the train reaches time T3, the data transmission is completed. The specific steps are as follows... Figure 5 As shown.

[0030] This invention, based on BeiDou positioning information, allows the train to determine its real-time distance to the ground by obtaining BeiDou positioning information from satellites. Unlike existing wireless millimeter-wave vehicle-to-ground data transfer schemes, this allows the train to estimate the preparation time before formal data transfer based on its own buffer and data reading rate, and to begin requesting network connection and transmission preparation at time T0. However, at time T0, the train has not yet reached the permissible range S1 of the millimeter-wave base station, so the network quality does not support vehicle-to-ground data transfer. At this time, the train continuously sends network connection requests and performs onboard data transfer preparation work at the onboard gateway. When the train reaches time T1', it has reached the permissible range S1 and successfully accesses the millimeter-wave vehicle-to-ground communication private network. Since the data transfer preparation work has been completed previously, onboard data can be transmitted immediately. By deploying a millimeter-wave communication base station and leveraging the high transmission rate of millimeter waves, instantaneous data backhaul is completed at T2', eliminating the need to consume time to prepare for transmission after network access, thereby effectively reducing transmission latency t. The specific steps are as follows: Figure 6 As shown.

[0031] Compared to existing solutions, the railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou positioning information proposed in this invention effectively saves transmission preparation delay, enabling trains to transmit more data in the same amount of time after joining the network. This is thanks to the introduction of the BeiDou positioning system. Existing solutions are sequential transmissions in terms of timing. Due to the lack of BeiDou positioning, the train's location is unknown, and it is impossible to determine when it will reach the coverage area or when it will access the network. Therefore, it is necessary to send frequent requests before joining the network and to begin a series of preparatory work such as data reading only after joining the network. This results in a delay in the actual transmission process. Although this process may only last for a few seconds, for millimeter-wave networks with large bandwidth and high speed, a few seconds can result in the loss of several Gbit or even tens of Gbit of data transmission. The method proposed in this embodiment of the invention is a parallel transmission in terms of timing. After introducing BeiDou positioning information, the train can know its own location information at all times. Based on its own speed information, it can accurately determine when it will arrive at position S1. Therefore, before arriving at S1, the train can estimate the preparation time for data transmission by combining its own disk read speed, server cache space, and other information, and begin preparation at time T0 before arriving at S1. The moment the train connects to the network, the prepared onboard data can be quickly transmitted to the ground station through the millimeter-wave high-speed channel. The few seconds of preparation time saved can be used to transmit more stored data. This embodiment of the invention can effectively improve the timeliness of data return, and the further saved latency can be used to transmit more onboard stored data, which can adapt to the potential surge in data volume in railways in the future.

[0032] The key to the embodiments of the present invention lies in: 1. A design for a vehicle-to-ground data transfer system interface based on BeiDou information is proposed. The proposed system interface provides a millimeter-wave data transfer framework based on BeiDou location information for current railway millimeter-wave vehicle-to-ground data transfer scenarios; 2. Based on the proposed interface design, a millimeter-wave vehicle-to-ground data transfer process based on BeiDou location information is proposed. This process reasonably explains the execution flow of the proposed method, effectively improves transfer efficiency and the amount of data transmitted back, saves preparation time after network access, and is adaptable to future vehicle-to-ground data transfer scenarios involving massive vehicle data backhaul.

[0033] Example 1: Existing railway vehicle-to-ground millimeter-wave wireless vehicle-to-ground data transfer system Assuming the data read rate of the vehicle gateway is 50 Gbit / s (referencing the full speed of an ORICO IG740 PCIe 4.0 SSD), and the vehicle data volume is 100 Gbit, it would take 2 seconds to read the entire data. Assuming the millimeter-wave transmission time is 1 Gbit / s, based on the existing railway vehicle-to-ground millimeter-wave wireless data transfer system, since the train lacks BeiDou location information and its positioning coordinates cannot be obtained throughout the process, after connecting to the millimeter-wave network, a total of 102 seconds of preparation and transmission time are required to complete the data transfer.

[0034] Example 2: Railway vehicle-to-ground millimeter-wave rapid data transfer system based on BeiDou location information Assuming the read rate of data from the vehicle gateway is 50 Gbit / s (referencing the full speed of an ORICO IG740 PCIe 4.0 SSD), and the vehicle data volume is 100 Gbit, it would take 2 seconds to read the data. Assuming the millimeter-wave transmission time is 1 Gbit / s, the railway vehicle-to-ground millimeter-wave rapid data transfer system based on BeiDou positioning information can complete transmission preparation before connecting to the millimeter-wave network because the train has BeiDou positioning information. After connecting to the millimeter-wave network, it would take 100 seconds to complete the data transfer. Even if the actual train speed reaches the network access position within 2 seconds, making it impossible to complete all transmission preparation work, some time can be saved for transmitting more data during the actual transmission process.

[0035] Combining Examples 1 and 2, the technical points proposed in the embodiments of the present invention can be verified. By adopting a railway vehicle-to-ground millimeter wave rapid data transfer method based on BeiDou positioning information, the data collection work for vehicle-to-ground data transfer can be started in advance using BeiDou positioning information. Compared with Example 1, Example 2 saves 2 seconds in this respect. With the high-speed transmission of millimeter waves, the extra 2 seconds can transfer at least 2 Gbit of onboard data. In summary, the embodiments of the present invention can effectively reduce the waiting time after the train enters the network and save labor costs.

[0036] System Implementation Examples According to embodiments of the present invention, a millimeter-wave vehicle-to-ground data transfer system based on BeiDou location information is provided. Figure 7 This is a schematic diagram of a millimeter-wave vehicle-to-ground data transfer system based on BeiDou location information, as an embodiment of the present invention. Figure 7 As shown, the millimeter-wave vehicle-to-ground data transfer system based on BeiDou location information according to an embodiment of the present invention specifically includes: Vehicle-mounted subsystem 70 and ground subsystem 72; The vehicle-mounted subsystem 70 includes: The vehicle-mounted ephemeris receiver is used to receive radio frequency signals transmitted by BeiDou satellites; A millimeter-wave vehicle-mounted radio, used to establish a millimeter-wave communication link with the ground subsystem; The Beidou positioning module is connected to the vehicle-mounted ephemeris receiver and is used to calculate the real-time location information of the train based on the radio frequency signal. The vehicle gateway, connected to the vehicle storage device and the millimeter-wave vehicle radio, is used to perform data reading and preparation. The vehicle controller is communicatively connected to the Beidou positioning module and the vehicle gateway, and is used to determine the data transmission preparation time based on the real-time location information, and control the vehicle gateway and the millimeter-wave vehicle radio to perform corresponding operations. The vehicle-mounted subsystem 70 also includes a low-to-medium frequency band communication module connected to the vehicle-mounted controller, used to send a network access request and / or train location information to the millimeter-wave ground base station when data transmission is ready.

[0037] The ground subsystem 72 includes: A millimeter-wave ground base station for communicating with the millimeter-wave vehicle-mounted radio; The ground gateway, connected to the ground storage device and the millimeter-wave ground base station, is used to receive and process vehicle-mounted data.

[0038] The system also includes a mid-to-low frequency wireless communication system, which is deployed in coordination with the millimeter-wave vehicle-mounted radio and the millimeter-wave ground base station to form a cross-coverage system. The low- and mid-frequency wireless communication system is used for wide-area coverage and signaling transmission; the millimeter-wave communication system is used for point-based enhancement in specific areas to complete high-speed data transfer of large amounts of data.

[0039] The embodiments of the present invention are system embodiments corresponding to the above method embodiments. The specific operation of each module can be understood by referring to the description of the method embodiments, and will not be repeated here.

[0040] In summary, the railway millimeter-wave rapid data transfer method based on BeiDou location information proposed in this embodiment of the invention has the following significant advantages compared with existing railway millimeter-wave vehicle-to-ground data transfer methods: 1. An innovative millimeter-wave vehicle-to-ground rapid data transfer method based on BeiDou information is proposed, which effectively improves data transfer efficiency and saves waiting time after network access; 2. The proposed rapid vehicle-to-ground data transfer method can effectively increase the amount of data transmitted back, and can be applied to future scenarios with massive amounts of vehicle data.

[0041] Device Example 1 This invention provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, performs the steps described in the method embodiment.

[0042] Device Example 2 This invention provides a computer-readable storage medium storing an information transmission implementation program, which, when executed by a processor, performs the steps described in the method embodiment.

[0043] The computer-readable storage media described in this embodiment include, but are not limited to, ROM, RAM, disk, or optical disk.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapid millimeter-wave data transfer method for railway vehicles based on BeiDou positioning information, characterized in that, include: The timing of data transmission preparation before the train enters the coverage area of ​​the millimeter-wave ground base station is determined based on the received real-time BeiDou location information. During the data transmission preparation period, the train performs data transmission preparation work and network access request in parallel. When the train successfully accesses the millimeter-wave ground base station network based on the BeiDou real-time location information, it immediately initiates the millimeter-wave transmission of the prepared data.

2. The method according to claim 1, characterized in that, The timing of data transmission preparation before the train enters the coverage area of ​​the millimeter-wave ground base station, based on the received real-time BeiDou location information, specifically includes: The train receives radio frequency signals sent by Beidou satellites through the onboard ephemeris receiver in the onboard subsystem. The Beidou positioning module calculates the train's current position information based on the radio frequency signals and sends the train's current position information to the millimeter-wave ground base station in the ground subsystem through the millimeter-wave onboard radio. The millimeter-wave ground base station calculates the real-time distance between the train and the boundary of the base station's coverage area based on the received position information and sends the real-time distance back to the onboard subsystem. The onboard controller in the vehicle subsystem calculates the remaining time for the train to enter the coverage area based on the real-time distance and the train's current speed, and compares the remaining time with the estimated preparation time required to complete the data transmission preparation. When the remaining time is less than or equal to the estimated preparation time, the current moment is determined to be the time to prepare for data transmission.

3. The method according to claim 2, characterized in that, The estimated preparation time is determined based on the amount of data to be transferred and the data reading rate of the on-board equipment.

4. The method according to claim 3, characterized in that, The estimated preparation time is also dynamically adjusted based on experience data from historical dumping missions.

5. The method according to claim 1, characterized in that, The data transmission preparation work includes at least one of the following operations: reading the data to be transferred from the vehicle-mounted storage device, encapsulating or processing the data to be transferred according to a protocol, and caching the data to be transferred into a transmission buffer.

6. A millimeter-wave vehicle-to-ground data transfer system based on BeiDou location information for implementing the method as described in any one of claims 1 to 5, characterized in that, include: Vehicle-mounted subsystems and ground subsystems; The vehicle-mounted subsystem includes: The vehicle-mounted ephemeris receiver is used to receive radio frequency signals transmitted by BeiDou satellites; A millimeter-wave vehicle-mounted radio, used to establish a millimeter-wave communication link with the ground subsystem; The Beidou positioning module is connected to the vehicle-mounted ephemeris receiver and is used to calculate the real-time location information of the train based on the radio frequency signal. The vehicle gateway, connected to the vehicle storage device and the millimeter-wave vehicle radio, is used to perform data reading and preparation. The vehicle controller is communicatively connected to the Beidou positioning module and the vehicle gateway, and is used to determine the data transmission preparation time based on the real-time location information, and control the vehicle gateway and the millimeter-wave vehicle radio to perform corresponding operations. The ground subsystem includes: A millimeter-wave ground base station for communicating with the millimeter-wave vehicle-mounted radio; The ground gateway, connected to the ground storage device and the millimeter-wave ground base station, is used to receive and process vehicle-mounted data.

7. The system according to claim 6, characterized in that, The vehicle-mounted subsystem also includes a low-to-medium frequency band communication module connected to the vehicle-mounted controller, used to send network access requests and / or train location information to the millimeter-wave ground base station when data transmission is ready.

8. The system according to claim 6, characterized in that, The system also includes a mid-to-low frequency wireless communication system, which is deployed in coordination with the millimeter-wave vehicle-mounted radio and the millimeter-wave ground base station to form a cross-coverage system. The low- and mid-frequency wireless communication system is used for wide-area coverage and signaling transmission. The millimeter-wave communication system is used for point-based enhancement in specific areas to complete high-speed data transfer of large amounts of data.

9. An electronic device, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information as described in any one of claims 1-5.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an implementation program for information transmission, which, when executed by a processor, implements the steps of the railway vehicle-to-ground millimeter-wave rapid data transfer method based on BeiDou location information as described in any one of claims 1-5.

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