Train remote information interaction method and system

Abstract

The invention provides a train remote information interaction method and system, the method is applied to a vehicle-mounted terminal, and the train remote information interaction system comprises the vehicle-mounted terminal, a train dispatching center and a ground terminal; the method comprises the following steps: acquiring current position information of a train in real time, intelligently selecting a target communication module according to signal intensity of multiple communication modules, and reporting the current position information of the train to a train dispatching center through the target communication module, the multi-communication module comprises an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module and a Beidou No.3 area short message communication module, and the reported train current position information is provided for a train dispatching center to issue the reported train current position information to a ground terminal. And the ground terminal judges whether train early warning is triggered or not according to the reported current position information of the train and a preset rule. The real-time performance, the stability and the high efficiency of information interaction between the train and the train dispatching center are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of train communication technology, and in particular to a train remote information interaction method and system. BACKGROUND

[0002] In the process of existing freight train operation, the current train position needs to be timely reported to the train dispatching center (cloud server), and the train dispatching center may also issue some dispatching instructions to the train. The existing Global System for Mobile communications-Railway (GSM-R) wireless communication is often interrupted in remote mountainous areas. For high-latitude remote areas and tunnel groups in China, public network communication blind areas lead to the inability of freight train real-time position information to be returned, and the communication quality and efficiency cannot be guaranteed during the communication process.

[0003] Therefore, there is an urgent need to provide an effective solution to solve the above technical problems. SUMMARY

[0004] In view of the above deficiencies in the prior art, the present application provides a train remote information interaction method and system. The present application integrates three complementary communication modules (LTE-4G, Tian Tong satellite, Beidou short message), and comprehensively utilizes the advantages of public network, narrowband satellite and navigation satellite communication, overcoming the signal blind area problem of single network in remote areas. Furthermore, based on the signal strength of each communication module, intelligent optimization of different communication networks is realized, and the real-time, stability and efficiency of information interaction between the train and the train dispatching center are realized.

[0005] In a first aspect, the present application provides a train remote information interaction method, which is applied to a vehicle terminal in a train remote information interaction system, the train remote information interaction system comprising the vehicle terminal, a train dispatching center and a ground terminal; the method comprising the following steps: real-time acquisition of current train position information; intelligent selection of a target communication module according to the signal strength of multiple communication modules, and reporting the current train position information to the train dispatching center through the target communication module; the multiple communication modules comprising an LTE-4G mobile public network communication module, a Tian Tong narrowband satellite communication module and a Beidou No. 3 regional short message communication module; wherein the reported current train position information is used for the train dispatching center to issue the reported current train position information to the ground terminal, and for the ground terminal to determine whether to trigger a train warning according to the reported current train position information and a preset rule.

[0006] The train remote information interaction method provided by the application, the train remote information interaction method comprises the following steps: The Beidou positioning module is used preferentially to obtain the current position information of the train. In the case that the train enters a Beidou signal shielding area, the inertial navigation positioning module is used automatically to obtain the current position information of the train.

[0007] The train remote information interaction method provided by the application, the train remote information interaction method comprises the following steps: The target communication module is selected intelligently according to the data transmission priority of the multiple communication modules and the signal strength of the multiple communication modules. The current position information of the train is reported to the train dispatching center through the target communication module.

[0008] The train remote information interaction method provided by the application, the signal strength of the multiple communication modules is judged based on the received signal strength indication (RSSI) value; the target communication module is selected intelligently according to the data transmission priority of the multiple communication modules and the signal strength of the multiple communication modules, and the method comprises the following steps: In the case that the RSSI value of the LTE-4G mobile public network communication module is within a set threshold range, the LTE-4G mobile public network communication module is determined as the target communication module. In the case that the RSSI value of the LTE-4G mobile public network communication module exceeds the set threshold range, the Tianhong narrowband satellite communication module is determined as the target communication module. In the case that the signal quality of the Tianhong narrowband satellite communication module does not meet the data transmission condition of the current position information of the train, the Beidou-3 regional short message communication module is determined as the target communication module.

[0009] The train remote information interaction method provided by the application, the data transmission priority of the multiple communication modules comprises the following steps: The priority of the LTE-4G mobile public network communication module is greater than the priority of the Tianhong narrowband satellite communication module. The priority of the Tianhong narrowband satellite communication module is greater than the priority of the Beidou-3 regional short message communication module.

[0010] The train remote information interaction method provided by the application, the method further comprises the following steps: If the BeiDou-3 regional short message communication module also fails to meet the data transmission conditions, the train's current location information will be stored locally. The signal quality of the LTE-4G mobile public network communication module, the Tiantong narrowband satellite communication module, and the Beidou-3 regional short message communication module are periodically queried to see if they meet the data transmission conditions. If any communication module meets the data transmission conditions, the untransmitted location data is reported to the train dispatch center through the communication module that meets the data transmission conditions.

[0011] Secondly, the present invention also provides a train remote information interaction system, which includes an on-board terminal, a train dispatching center and a ground terminal. The on-board terminal is used to acquire the train's current location information in real time; intelligently select a target communication module based on the signal strength of multiple communication modules, and report the train's current location information to the train dispatch center through the target communication module; the multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module; The train dispatch center is used to send the reported current location information of the train to the ground terminal; The ground terminal is used to determine whether to trigger a train warning based on the reported current train location information and preset rules.

[0012] Thirdly, the present invention also provides a train remote information interaction device, which is applied to an on-board terminal in a train remote information interaction system, the train remote information interaction system including the on-board terminal, a train dispatching center, and a ground terminal; the device includes the following modules: The acquisition module is used to acquire the train's current location information in real time. The interaction module is used to intelligently select a target communication module based on the signal strength of multiple communication modules, and report the current location information of the train to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported current location information of the train is used by the train dispatch center to send the reported current location information of the train to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported current location information of the train and preset rules.

[0013] Fourthly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the train remote information interaction method as described above.

[0014] Fifthly, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the train remote information interaction method as described above.

[0015] In a sixth aspect, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the train remote information interaction method as described above.

[0016] The present invention provides a train remote information interaction method and system, which is applied to the on-board terminal in the train remote information interaction system. The train remote information interaction system includes the on-board terminal, the train dispatch center, and the ground terminal. The method includes: firstly, acquiring the current position information of the train in real time; then, intelligently selecting the target communication module according to the signal strength of multiple communication modules, and reporting the current position information of the train to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported current position information of the train is used by the train dispatch center to send the reported current position information of the train to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported current position information of the train and preset rules.

[0017] The vehicle-mounted terminal of this invention pre-deploys multiple communication modules, including an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. During train location information exchange, the vehicle-mounted terminal intelligently selects a target communication module based on the signal strength of the multiple communication modules and reports the train's current location information to the train dispatch center through the target communication module. Subsequently, the train dispatch center sends the reported train location information to the ground terminal, which determines whether to trigger a train warning based on the reported train location information and preset rules. This invention integrates three complementary communication modules (LTE-4G, Tiantong satellite, and Beidou short message), comprehensively utilizing the advantages of public network, narrowband satellite, and navigation satellite communication, overcoming the signal blind spot problem of a single network in remote areas. Furthermore, it intelligently optimizes different communication networks based on the signal strength of each communication module, achieving real-time, stable, and efficient information exchange between the train and the train dispatch center. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a flowchart illustrating the train remote information interaction method provided by the present invention.

[0020] Figure 2 This is a schematic diagram of the communication between the vehicle-mounted terminal and the dispatch center provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the train remote information interaction system provided by the present invention.

[0022] Figure 4 This is a schematic diagram of the train remote information interaction device provided by the present invention.

[0023] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first node can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] The following is combined with Figures 1-5 The present invention describes a train remote information interaction method and system.

[0027] Figure 1This is a flowchart illustrating the train remote information interaction method provided by the present invention. The method is applied to an onboard terminal in a train remote information interaction system, which includes the onboard terminal, a train dispatching center, and a ground terminal. Figure 1 As shown, the method includes the following: Step 101: Obtain the train's current location information in real time.

[0028] Step 102: Intelligently select a target communication module based on the signal strength of the multiple communication modules, and report the train's current location information to the train dispatch center through the target communication module; the multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module; wherein, the reported train current location information is used by the train dispatch center to send the reported train current location information to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported train current location information and preset rules.

[0029] Specifically, the subject of this invention is the on-board terminal in the train remote information interaction system, which includes the on-board terminal, the train dispatching center, and the ground terminal.

[0030] The onboard terminal is an intelligent device installed on the train (especially freight trains in remote areas). It serves as the data acquisition and communication execution end of the entire system, responsible for sensing the train's status and establishing a connection with the remote center. Its core functions include: positioning: obtaining the train's precise geographical location in real time and continuously; communication: sending location data to the train dispatch center through the optimal communication link; intelligent decision-making and switching: autonomously selecting the best communication network; and data storage: storing data locally for later transmission when communication is completely interrupted.

[0031] The train dispatch center, also known as the "cloud server," is the system's brain and data hub. It is typically a remote cloud computing platform with powerful computing and storage capabilities. Its core functions are as follows: 1. Data Aggregation and Processing: Receives location data reported by onboard terminals of all trains along the entire line. 2. Data Standardization and Storage: Standardizes heterogeneous data uploaded using different communication protocols, forming a unified data stream, and stores it persistently in a database. 3. Information Distribution: Distributes the processed real-time train location information to relevant ground terminals. 4. Global Monitoring and Dispatch: Provides dispatchers with a global operational map and is the core platform for implementing train dispatching and command.

[0032] The workflow of the train dispatch center is as follows: It continuously receives data packets (including train location information) reported from different trains through different networks (4G / Tiantong / Beidou); it parses, cleans, and standardizes the data packets to ensure that subsequent systems can correctly identify them; it pushes (or makes available for querying) the standardized train location information to authorized ground terminal users in real time; and it stores historical trajectory data for operation analysis, accident tracing, etc.

[0033] Ground terminals are the information consumption and early warning execution ends of the system. They are deployed at the locations of ground staff (such as dispatchers and safety monitors) and serve as the direct interface for interaction between the system and users.

[0034] 1. Core Functions: Information reception and display: Obtain and display in real time information such as the location, speed, and status of one or more trains from the dispatch center (cloud server) (usually on an electronic map).

[0035] Early warning rule judgment: Based on the pre-compiled rules (weights 1 and 10), the system automatically analyzes the train's current location information to determine whether there is a safety risk.

[0036] Alarm Trigger: When the judgment result triggers the warning condition, an alarm will be immediately issued to the staff in the form of sound, light, pop-up window, etc.

[0037] 2. The workflow is as follows: The system maintains a real-time connection with the cloud server via a communication module, subscribing to the dynamic information of the required trains. The train's operational status is visually displayed on the software interface. The background program continuously compares the received train data with the built-in safety rule base.

[0038] Once a situation is detected such as "the train's position exceeds the electronic fence" or "the train's speed exceeds the speed limit", an alarm will be automatically triggered to remind staff to intervene.

[0039] The division of labor and cooperation among the three are shown in Table 1 below: Table 1

[0040] Specifically, the train remote information interaction method in this embodiment is implemented as follows: First, the train's current location information is acquired in real time. For example, location data is continuously obtained from the BeiDou / inertial navigation combined positioning system through the train's onboard terminal.

[0041] In step 102, the multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. During the location information reporting process (reporting the current location information of the train to the train dispatch center), the target communication module is intelligently selected based on the signal strength of the multiple communication modules.

[0042] "Signal strength" represents a measurable indicator of communication link quality. The vehicle terminal's main control program reads these indicators in real time to determine whether a particular communication module currently has the ability to reliably transmit data. The "signal strength" of each communication module is explained as follows: 1. LTE-4G mobile public network communication module Key Metric: Received Signal Strength Indicator (RSSI) What it is: A value that measures the power of a received radio signal.

[0043] Unit: dBm (decibels milliwatts).

[0044] Features: The closer a negative value is to 0, the stronger the signal (e.g., -50 dBm is better than -90 dBm).

[0045] The invention is the primary and clear criterion for judgment. How it's used for decision-making: The system presets one or more RSSI thresholds (e.g., -80dBm). When the measured RSSI > -80dBm, the signal is considered good, and the 4G network is used. When the measured RSSI < -80dBm, the signal is considered poor, and a handover to the Tiantong satellite is triggered.

[0046] 2. Tiantong narrowband satellite communication module & Beidou-3 regional short message communication module For satellite communications, assessing link quality is more complex than for terrestrial cellular networks. In this invention, "signal strength" is typically a comprehensive concept of "signal quality," encompassing one or more of the following parameters: a) Carrier power and signal-to-noise ratio Carrier power: Similar to RSSI, it represents the overall power of the received satellite signal.

[0047] Signal-to-noise ratio (SNR), measured in dB (decibels): The ratio of useful signal power to background noise power. This is a more critical and reliable indicator of satellite link quality. Why it's important: In space, even if the absolute signal power is not low, if the noise is greater, the signal will still be overwhelmed and cannot be properly demodulated. A high SNR means a clear, high-quality signal.

[0048] b) Bit Error Rate (BER) The percentage of erroneous bits out of the total number of bits during transmission directly reflects the accuracy of data transmission. Even if the SNR is acceptable, a high BER means that data packets frequently malfunction and require retransmission, causing a sharp drop in the effective data transmission rate and making reliable communication practically impossible.

[0049] c) Beam information and lock status Beam information: Satellite signal coverage is directional. Terminals need to confirm whether they are within the effective coverage area of ​​the satellite beam.

[0050] Lock-on status: This refers to whether the terminal's antenna has successfully tracked and locked onto the target satellite. This is a prerequisite for establishing a communication connection. If a lock-on cannot be achieved, signal strength is meaningless.

[0051] Therefore, "signal strength of multiple communication modules" is a collection of multi-level and multi-dimensional technical concepts. It includes both the relatively simple RSSI for 4G networks and the more complex comprehensive signal quality (such as signal-to-noise ratio, bit error rate, and lockout status) for satellite communications.

[0052] The reported location data (current train location) needs to be standardized to unify the data format of different communication protocols, which can ensure that the communication data content between the ground terminal, the on-board terminal and the train dispatch center (cloud server) is consistent.

[0053] In step 102, the target communication module is intelligently selected based on the signal strength of multiple communication modules, and the train's current location information is reported to the train dispatch center through the target communication module, thereby achieving efficient and stable interaction of train location information.

[0054] Optionally, when the train's onboard terminal switches to the Tiantong narrowband satellite communication module, the information exchange frequency between it and the train dispatch center (cloud service) is 1 message / 30 seconds; when the train's onboard terminal switches to the Beidou-3 regional short message communication module, the exchange frequency between it and the dispatch center is 1 message / 1 minute.

[0055] Furthermore, after receiving the reported train current location information, the train dispatch center sends the reported train current location information to the ground terminal. After receiving it, the ground terminal determines whether to trigger a train warning based on the reported train current location information and preset rules.

[0056] Here is an example of a preset early warning rule: (1) Geographic fence: whether the train has entered a restricted area, deviated from the planned route, or approached a dangerous area.

[0057] (2) Speed ​​threshold: whether the train is speeding or the speed is too low in a specific section.

[0058] (3) Operation plan: Whether the train stops at a certain location at the scheduled time (delay or abnormal stop).

[0059] (4) Other logic: the two trains are too close to each other, etc.

[0060] For example, Figure 2 This is a schematic diagram illustrating the communication between the vehicle-mounted terminal and the dispatch center provided by the present invention. Figure 2 As shown, the system mainly includes an on-board terminal, Tiantong satellite, Beidou-3 satellite, multiple base stations, and a (train) dispatch center, with the on-board terminal as the core component. The LTE-4G communication path is as follows: the on-board terminal establishes a connection with the base stations via the LTE-4G wireless network, and the base stations then transmit data to the dispatch center via the LTE-4G link. Simultaneously, to enhance communication reliability and coverage, the on-board terminal also participates in the communication link via Tiantong and Beidou-3 satellites, forming redundant paths (Tiantong satellite communication path and Beidou-3 satellite communication path), ensuring stable and efficient data transmission between the on-board terminal and the dispatch center. This schematic diagram illustrates the multi-mode communication fusion design in this invention, combining LTE-4G terrestrial network and satellite communication (Tiantong and Beidou-3 satellites), improving the communication stability of the on-board terminal in complex environments, and making it suitable for applications such as intelligent traffic dispatching.

[0061] The method provided in this embodiment is applied to the onboard terminal in a train remote information interaction system. The train remote information interaction system includes an onboard terminal, a train dispatch center, and a ground terminal. The method includes: firstly, acquiring the current location information of the train in real time; then, intelligently selecting a target communication module based on the signal strength of multiple communication modules, and reporting the current location information of the train to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported current location information of the train is used by the train dispatch center to send the reported current location information of the train to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported current location information of the train and preset rules.

[0062] The vehicle-mounted terminal of this invention pre-deploys multiple communication modules, including an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. During train location information exchange, the vehicle-mounted terminal intelligently selects a target communication module based on the signal strength of the multiple communication modules and reports the train's current location information to the train dispatch center through the target communication module. Subsequently, the train dispatch center sends the reported train location information to the ground terminal, which determines whether to trigger a train warning based on the reported train location information and preset rules. This invention integrates three complementary communication modules (LTE-4G, Tiantong satellite, and Beidou short message), comprehensively utilizing the advantages of public network, narrowband satellite, and navigation satellite communication, overcoming the signal blind spot problem of a single network in remote areas. Furthermore, it intelligently optimizes different communication networks based on the signal strength of each communication module, achieving real-time, stable, and efficient information exchange between the train and the train dispatch center.

[0063] It should be noted that each implementation method of this application can be freely combined, rearranged, or executed individually, and does not need to rely on or depend on a fixed execution order.

[0064] According to a train remote information interaction method provided by the present invention, the on-board terminal includes an automatic location acquisition device, which integrates a Beidou positioning module and an inertial navigation positioning module; the real-time acquisition of the train's current location information includes: The BeiDou positioning module is used first to obtain the train's current location information; When the train enters an area where the BeiDou signal is blocked, the inertial navigation and positioning module is automatically used to obtain the train's current location information.

[0065] Specifically, in some embodiments, the vehicle-mounted terminal includes an automatic location acquisition device, which integrates a BeiDou positioning module and an inertial navigation positioning module.

[0066] The BeiDou positioning module and the inertial navigation positioning module are described below: I. Beidou Positioning Module The BeiDou positioning module is a receiver whose core function is to receive space radio signals from the BeiDou Navigation Satellite System (BDS) and calculate its precise geographical location (latitude, longitude, and altitude) and time information. It operates according to the principle of satellite triangulation. Step 1: Receive signal The module simultaneously receives signals broadcast from multiple (usually four or more) BeiDou satellites, which contain the satellite's precise location information and the timestamp of the signal transmission.

[0067] Step 2: Calculate the distance The module calculates the "pseudorange" from the module to each satellite by comparing the time difference between the signal arrival time and the transmission time and multiplying it by the speed of light.

[0068] Step 3: Solve for position The processor inside the receiver uses this distance information to different satellites and employs complex mathematical algorithms to calculate its own three-dimensional coordinates on Earth.

[0069] The main features of the BeiDou positioning module include: Absolute positioning: provides the absolute position in a global coordinate system, such as the World Geodetic System-84 (WGS-84), with unique and universal coordinate values.

[0070] High long-term accuracy: In environments with a wide-open and unobstructed view of the sky, civilian-grade accuracy can reach the meter level or even the sub-meter level, while RTK (Real-time kinematic) carrier phase differential technology can achieve centimeter-level accuracy.

[0071] No cumulative error: Its positioning error does not accumulate with time or distance traveled. The error mainly comes from satellite clock errors, orbital errors, atmospheric delay, and multipath effects.

[0072] Dependent on external signals: It can only work if it receives a sufficient number of high-quality satellite signals.

[0073] Application and limitations of the BeiDou positioning module in this invention: When the train is running in an open area, the BeiDou positioning module is used preferentially to obtain high-precision absolute position information. However, when the train enters mountainous areas, tunnels, or covered tunnels, satellite signals are blocked or severely attenuated, causing the BeiDou module to fail to locate, creating a "positioning blind spot." Therefore, this invention further introduces an inertial navigation positioning module for position acquisition. The inertial navigation positioning module is described below: An inertial navigation and positioning module is an autonomous, computational navigation system. It does not rely on any external signals; its core function is to use an inertial measurement unit (IMU) to sense motion. A typical IMU includes: Gyroscope: Used to measure the angular velocity (i.e., the rate of turning, pitching, and rolling) of a vehicle (such as a train) in three directions.

[0074] Accelerometer: Used to measure the linear acceleration of a carrier in three directions.

[0075] Its operation follows the principle of integral calculation: 1. Initial alignment: Before starting or entering the blind zone, it is necessary to start from a known precise position and attitude (e.g., obtained from the BeiDou module).

[0076] 2. Measurement and Calculation: Integrate the acceleration measured by the accelerometer to obtain the change in velocity.

[0077] Integrate the velocity again to obtain the displacement of the position.

[0078] Integrating the angular velocity measured by the gyroscope yields the changes in attitude angles (heading, pitch, roll).

[0079] 3. Continuous calculation: Through continuous integration calculation, the IMU can calculate the current position and attitude from the position and attitude of the previous moment.

[0080] The main features are: Autonomy and stealth: It does not rely on any external signals, has strong anti-interference capabilities, and can work in any environment (underground, underwater, electromagnetic shielding environment).

[0081] Relative positioning: provides displacement and attitude changes relative to the starting point, which is relative navigation information.

[0082] High short-term accuracy and high-frequency response: It can detect minute movements and vibrations with great sensitivity, and the data output frequency is extremely high (up to hundreds of hertz / Hz), making it suitable for real-time control of dynamic objects.

[0083] Cumulative error exists: This is the most fatal flaw of inertial navigation. Because it is calculated through integration, the tiny zero bias of the gyroscope and the measurement error of the accelerometer are continuously amplified over time. This causes the positioning error to increase with the square or cube of time, i.e., "drift". With prolonged use alone, the position information becomes completely unreliable.

[0084] The inertial navigation and positioning module is specifically designed to address the "blind spot" problem of BeiDou signals. When a train enters an area obstructed by mountains or through tunnels, and BeiDou signals are lost, the system immediately switches to the inertial navigation and positioning module. During the brief period of BeiDou signal interruption, the inertial module can provide continuous and smooth position calculations, ensuring real-time output of train position information and avoiding monitoring interruptions. Its "independence-free" characteristic is key to compensating for BeiDou's shortcomings.

[0085] Through the above analysis, we can clearly see that the characteristics of these two modules are perfectly complementary. The comparison of their characteristics is shown in Table 2 below: Table 2

[0086] Step 101, which involves acquiring the train's current location information in real time, is achieved through the following steps: The Beidou positioning module is used first to obtain the current location information of the train; when the train enters an area where the Beidou signal is blocked (for example, when there is no Beidou signal in the mountain or tunnel area), the inertial navigation positioning module is used automatically to obtain the current location information of the train. That is, the inertial navigation positioning module can output the current geographical location of the train in real time and report the location data to the dispatch center (cloud server) through the communication module.

[0087] This invention combines the two, utilizing BeiDou to provide a long-term, drift-free absolute reference and providing initial alignment for the inertial navigation system (INS). The INS provides continuous position estimation during short periods of satellite signal failure. This combination enables uninterrupted position awareness for trains across the entire route (especially on remote and complex lines). This configuration constitutes a redundant system. Even if one fails, the other can maintain functionality for a period, significantly improving the reliability and robustness of the entire positioning system.

[0088] The method provided in this embodiment utilizes inertial navigation for position estimation during the transition period of satellite signal loss, avoiding jumps or interruptions in positioning information and providing a smooth and reliable flow of position data for train safety monitoring. In other words, by using a combination of BeiDou and inertial navigation positioning, continuous and reliable train position information and other data can be obtained in any terrain (such as mountains or tunnels), enhancing the robustness of the positioning system.

[0089] According to a train remote information interaction method provided by the present invention, the step of intelligently selecting a target communication module based on the signal strength of multiple communication modules, and reporting the current location information of the train to the train dispatch center through the target communication module, includes: The target communication module is intelligently selected based on the data transmission priority and signal strength of the multiple communication modules. The target communication module reports the train's current location information to the train dispatch center.

[0090] Specifically, in some embodiments, the process of intelligently selecting a communication module and reporting the train's current location information to the train dispatch center (cloud server) based on the selected communication module in step 102 is implemented through the following steps: The target communication module is intelligently selected based on the data transmission priority and signal strength of the multiple communication modules.

[0091] The data transmission priority of multiple communication modules represents a fixed priority order of the three candidate communication modules. For example, the data transmission priority of multiple communication modules is based on cost and speed selection, that is, low cost and high speed are given priority, which allows the system to operate in the optimal cost-performance mode in most cases. Clear priority rules can also avoid complex decision-making algorithms, making the communication switching process fast and stable, reducing system overhead and decision delay.

[0092] The data transmission priority of multiple communication modules is combined with the signal strength of multiple communication modules as a basis for selecting the target communication module. Through multi-level index evaluation, the target communication module for reporting the current position of the train to the train dispatch center (cloud server) is intelligently selected.

[0093] Then, the train's current location information is reported to the train dispatch center through the selected target communication module, completing the information exchange.

[0094] The method provided in this embodiment combines the fixed priority order of the three communication modules and the signal strength of the multiple communication modules to intelligently select the target communication module, so that the system can operate in the optimal cost-performance mode in most cases, making the communication switching process fast and stable, and reducing system overhead and decision delay.

[0095] According to a train remote information interaction method provided by the present invention, the signal strength of the multiple communication modules is determined based on the received signal strength indicator (RSSI) value; the step of intelligently selecting a target communication module according to the data transmission priority of the multiple communication modules and the signal strength of the multiple communication modules includes: If the RSSI value of the LTE-4G mobile public network communication module is within a set threshold range, the LTE-4G mobile public network communication module is identified as the target communication module. When the RSSI value of the LTE-4G mobile public network communication module exceeds the set threshold range, the Tiantong narrowband satellite communication module is identified as the target communication module. If the signal quality of the Tiantong narrowband satellite communication module does not meet the data transmission conditions for the current location information of the train, the Beidou-3 regional short message communication module will be selected as the target communication module.

[0096] Specifically, in some embodiments, the signal strength of the multiple communication modules is determined based on the Received Signal Strength Indicator (RSSI) value. The RSSI value is used to indicate the power of the radio signal received by the receiving device (such as the train-mounted terminal in this patent) from the transmitting device (such as a 4G base station). Unit: usually in dBm (decibels milliwatts), representing the power level relative to 1 milliwatt (mW).

[0097] The working principle and measurement of RSSI are described below: Measurement process: The internal circuitry of a wireless communication module (such as an LTE-4G module) continuously monitors the power of the radio frequency signal received at its antenna.

[0098] Quantization output: The module converts the measured analog signal power into a digital RSSI value and reports it to the terminal's main control system or software.

[0099] The onboard terminal's main control program reads this RSSI value in real time and compares it with a preset threshold range to determine the current channel quality and decide whether to switch communication networks. In the scenario of this invention, when the train is traveling in a remote area, at the edge of LTE-4G base station coverage, its RSSI value will gradually decrease from the "good" range (e.g., -65dBm) to the "weak" range (e.g., -85dBm). The system's preset threshold (e.g., -75dBm) is this "switching trigger point".

[0100] This invention provides a clear, executable, and repeatable criterion for switching communication modules by monitoring RSSI values ​​and comparing them with a set threshold. This avoids subjective judgment and achieves complete automation.

[0101] Correspondingly, step 102, intelligently selecting the target communication module, is achieved through the following steps: If the RSSI value of the LTE-4G mobile public network communication module is within a set threshold range, the LTE-4G mobile public network communication module is identified as the target communication module for data reporting. For example, the set threshold range is -70dBm to 0dBm. If the RSSI value of the LTE-4G mobile public network communication module is -65dBm, then the LTE-4G mobile public network communication module is identified as the target communication module.

[0102] LTE-4G is significantly cheaper than satellite communication. By setting a reasonable RSSI threshold, the system can maximize the use of low-cost public networks, only resorting to more expensive satellite links when public network quality is truly substandard. This perfectly balances the trade-off between communication reliability and cost-effectiveness.

[0103] The LTE-4G mobile public network communication process is described below: The difference between LTE-4G mobile public network communication and short message communication in the three northern regions and Tiantong narrowband satellite communication is that LTE-4G mobile public network communication is based on the mobile 4G communication module built into the vehicle terminal and communicates with the public network ground base station. It requires the operator to set up communication base stations in advance. In areas with less communication demand, such as uninhabited areas, there are fewer ground mobile communication base stations, which cannot meet the remote data communication function of railway trains.

[0104] When reporting current mileage data (train's current location), the onboard terminal prioritizes determining whether the ground mobile network signal meets the data transmission requirements. If the current ground mobile network signal is good, the data is transmitted to the user dispatch center using the ground mobile network signal. If the current ground mobile network signal is poor or there is no public network signal, the onboard terminal determines the quality of the Tiantong satellite communication signal and the short message communication signal in the North China Three Regions, and prioritizes using the communication link with better signal strength to transmit the current mileage data to the user dispatch center.

[0105] When the RSSI value of the LTE-4G mobile public network communication module exceeds the set threshold range, the Tiantong narrowband satellite communication module will be identified as the target communication module.

[0106] For example, when the RSSI value of the LTE-4G mobile public network communication module drops to -85dBm and falls into the weak signal range, it proactively and predictively switches to the Tiantong satellite link.

[0107] When the vehicle-mounted terminal switches to the Tiantong narrowband satellite communication terminal, it is necessary to query the signal quality and beam information of the Tiantong narrowband satellite in real time. If the Tiantong narrowband satellite meets the data transmission conditions, the Tiantong narrowband satellite communication method should be selected first.

[0108] The process of Tiantong narrowband satellite communication is described below: The Tiantong narrowband satellite communication process is similar to the BeiDou-3 regional short message communication. Tiantong narrowband satellite communication achieves wireless data communication through a space link composed of Tiantong satellites. The vehicle-mounted terminal has a built-in Tiantong narrowband satellite communication module, which establishes a connection with Tiantong satellites in space to transmit data.

[0109] If the signal quality of the Tiantong narrowband satellite communication module does not meet the data transmission conditions for the train's current location information, the signal quality and beam characteristics of the Beidou-3 system are queried to determine whether the data transmission requirements are met. If they are met, the Beidou-3 regional short message communication module is identified as the target communication module.

[0110] For example, during the intelligent selection of the target communication module, the lower-cost LTE-4G network (i.e., data reporting based on the LTE-4G mobile public network communication module) is given priority. When the LTE-4G signal is poor, it automatically switches to Tiantong narrowband satellite, which can seamlessly switch to satellite communication. When the Tiantong satellite signal is also poor, it switches to Beidou short message.

[0111] The BeiDou-3 regional short message communication process is described below: (1) Prepare information and send request The vehicle-mounted terminal integrates a BeiDou-3 short message communication module, which supports data information editing and address selection functions. It obtains the current location data of the train through GPS, converts it into railway mileage data based on the location, writes short message content according to the data communication protocol, selects the recipient terminal address, and initiates a sending request. This process realizes two-way communication in an environment without a terrestrial network through the BeiDou-3 satellite link.

[0112] (2) Encryption and satellite relay During transmission, the vehicle-mounted terminal encrypts the information, including the recipient's ID and the communication content, and then forwards it to the ground control station via BeiDou satellite. The encryption process uses the BeiDou system's standard encryption protocol to ensure the security of the communication content during satellite transmission and prevent the information from being intercepted or tampered with.

[0113] (3) Ground central station processing After receiving the signal, the ground control station decrypts it, then re-encrypts it before adding the outbound broadcast message, which is then broadcast to users via satellite. This process is achieved through a two-way link between the ground station and the satellite. The ground station has large-scale data processing capabilities, enabling it to handle communication requests from multiple users simultaneously and ensuring the accuracy and timeliness of the broadcast message.

[0114] (4) Receiving and decryption by the recipient The receiver uses the user terminal to receive the outgoing signal, demodulates and decrypts it to extract the valid communication content from the satellite broadcast signal, restores it to the original text information to complete the communication, and transmits the data information to the dispatch center.

[0115] The essence of BeiDou short message technology is to realize two-way data transmission between ground users and satellites, and between satellites and ground control centers, through a "space-based communication network" built by the BeiDou satellite constellation.

[0116] The method provided in this invention prioritizes the use of the LTE-4G public network for data transmission and judges signal strength through RSSI value. When the LTE-4G signal is poor, it automatically switches to Tiantong narrowband satellite. When the Tiantong satellite signal is also poor, it switches to Beidou short message service. This forms a three-level progressive communication guarantee from "public network to narrowband satellite to short message service", which maximizes the guarantee that key data can be sent out and improves the real-time performance, stability and efficiency of information interaction between trains and train dispatching centers.

[0117] According to a train remote information interaction method provided by the present invention, the data transmission priority of the multiple communication modules includes: The priority of the LTE-4G mobile public network communication module is higher than the priority of the Tiantong narrowband satellite communication module. The priority of the Tiantong narrowband satellite communication module is higher than that of the Beidou-3 regional short message communication module.

[0118] Specifically, in some embodiments, the data transmission priority of multiple communication modules includes: the priority of the LTE-4G mobile public network communication module is higher than that of the Tiantong narrowband satellite communication module; the priority of the Tiantong narrowband satellite communication module is higher than that of the Beidou-3 regional short message communication module.

[0119] The advantages of this approach are: in areas with good public network signal, the lower-cost LTE-4G network is prioritized, avoiding unnecessary satellite communication costs; when the LTE-4G signal is poor, it automatically switches to Tiantong narrowband satellite; when the Tiantong satellite signal is also poor, it switches to Beidou short message service. By integrating three complementary communication modules (LTE-4G, Tiantong satellite, and Beidou short message service), the advantages of public network, narrowband satellite, and navigation satellite communication are comprehensively utilized, overcoming the signal blind spot problem of a single network in remote areas.

[0120] The method provided in this embodiment clarifies the fixed priority order of the three communication modules. The solidified priority (low cost and high speed take precedence) enables the system to operate in the optimal cost-performance mode in most cases, optimizing system resources and costs. In addition, the clear priority rules avoid complex decision-making algorithms, making the communication switching process fast and stable, reducing system overhead and decision delay, simplifying the switching logic, and improving decision efficiency.

[0121] According to a train remote information interaction method provided by the present invention, the method further includes: If the BeiDou-3 regional short message communication module also fails to meet the data transmission conditions, the train's current location information will be stored locally. The signal quality of the LTE-4G mobile public network communication module, the Tiantong narrowband satellite communication module, and the Beidou-3 regional short message communication module are periodically queried to see if they meet the data transmission conditions. If any communication module meets the data transmission conditions, the untransmitted location data is reported to the train dispatch center through the communication module that meets the data transmission conditions.

[0122] Specifically, in some embodiments, the method further includes: In the process of determining the target communication module based on the data transmission priority of multiple communication modules, if the Beidou-3 regional short message communication module also fails to meet the data transmission conditions, that is, if the current multiple communication modules do not meet the data transmission conditions, the vehicle terminal will store the train's current location information locally on the vehicle terminal.

[0123] At the same time, the signal quality of the LTE-4G mobile public network communication module, the Tiantong narrowband satellite communication module, and the Beidou-3 regional short message communication module are periodically queried to see if they meet the data transmission conditions.

[0124] For example, the system periodically queries whether the signal quality of the mobile public network LTE-4G communication module, the signal quality of the Tiantong narrowband satellite communication, and the signal quality of the Beidou-3 satellite communication meet the communication requirements. As long as one of the communication modules meets the communication conditions, the system reports the untransmitted location data to the train dispatch center based on the communication module that meets the communication conditions.

[0125] The method provided in this embodiment clarifies that when all communication modules are unavailable, data is stored locally and periodically retried for reporting. On the one hand, this prevents data loss: in the extreme case of complete communication interruption, critical location information is stored locally and resent after communication is restored, ensuring data integrity and traceability. On the other hand, it achieves eventual data consistency: through periodic querying and automatic re-reporting mechanisms, it ensures that the train dispatching center (cloud server) can eventually obtain the complete train operation trajectory, providing reliable data support for dispatching and analysis.

[0126] Figure 3 This is a schematic diagram of the structure of the train remote information interaction system provided by the present invention, as shown below. Figure 3 As shown, the train remote information interaction system includes an onboard terminal, a train dispatching center, and a ground terminal; The on-board terminal is used to acquire the train's current location information in real time; intelligently select a target communication module based on the signal strength of multiple communication modules, and report the train's current location information to the train dispatch center through the target communication module; the multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module; The train dispatch center is used to send the reported current location information of the train to the ground terminal; The ground terminal is used to determine whether to trigger a train warning based on the reported current train location information and preset rules.

[0127] The train remote information interaction system of this invention includes an onboard terminal, a train dispatch center, and a ground terminal. The onboard terminal pre-deploys multiple communication modules, including an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. During train location information interaction, the onboard terminal intelligently selects a target communication module based on the signal strength of the multiple communication modules and reports the train's current location information to the train dispatch center through the target communication module. The train dispatch center then sends the reported train location information to the ground terminal, which determines whether to trigger a train warning based on the reported train location information and preset rules. This invention integrates three complementary communication modules (LTE-4G, Tiantong satellite, and Beidou short message), comprehensively utilizing the advantages of public network, narrowband satellite, and navigation satellite communication, overcoming the signal blind spot problem of a single network in remote areas. Furthermore, it intelligently optimizes different communication networks based on the signal strength of each communication module, achieving real-time, stable, and efficient information interaction between the train and the train dispatch center.

[0128] The train remote information interaction device provided by the present invention is described below. The train remote information interaction device described below and the train remote information interaction method described above can be referred to in correspondence.

[0129] Figure 4 This is a schematic diagram of the structure of the train remote information interaction device provided by the present invention, as shown below. Figure 4 As shown, the train remote information interaction device 400 is applied to the onboard terminal of the train remote information interaction system, which includes the onboard terminal, the train dispatching center, and the ground terminal; the train remote information interaction device 400 includes the following modules: The acquisition module 410 is used to acquire the train's current location information in real time; The interaction module 420 is used to intelligently select a target communication module based on the signal strength of multiple communication modules, and report the current position information of the train to the train dispatch center through the target communication module; the multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module; wherein, the reported current position information of the train is used by the train dispatch center to send the reported current position information of the train to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported current position information of the train and preset rules.

[0130] The device provided in this embodiment is applied to the on-board terminal in a train remote information interaction system. The train remote information interaction system includes an on-board terminal, a train dispatch center, and a ground terminal. The method includes: an acquisition module 410, used to acquire the current position information of the train in real time; and an interaction module 420, used to intelligently select a target communication module based on the signal strength of multiple communication modules, and report the current position information of the train to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported current position information of the train is used by the train dispatch center to send the reported current position information of the train to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported current position information of the train and preset rules.

[0131] The vehicle-mounted terminal of this invention pre-deploys multiple communication modules, including an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. During train location information exchange, the vehicle-mounted terminal intelligently selects a target communication module based on the signal strength of the multiple communication modules and reports the train's current location information to the train dispatch center through the target communication module. Subsequently, the train dispatch center sends the reported train location information to the ground terminal, which determines whether to trigger a train warning based on the reported train location information and preset rules. This invention integrates three complementary communication modules (LTE-4G, Tiantong satellite, and Beidou short message), comprehensively utilizing the advantages of public network, narrowband satellite, and navigation satellite communication, overcoming the signal blind spot problem of a single network in remote areas. Furthermore, it intelligently optimizes different communication networks based on the signal strength of each communication module, achieving real-time, stable, and efficient information exchange between the train and the train dispatch center.

[0132] According to the present invention, a train remote information interaction device 400 is provided, wherein the on-board terminal includes an automatic location acquisition device, and the acquisition module 410 is specifically used for: The BeiDou positioning module is used first to obtain the train's current location information; When the train enters an area where the BeiDou signal is blocked, the inertial navigation and positioning module is automatically used to obtain the train's current location information.

[0133] According to the present invention, a train remote information interaction device 400 is provided, wherein the interaction module 420 is specifically used for: The target communication module is intelligently selected based on the data transmission priority and signal strength of the multiple communication modules. The target communication module reports the train's current location information to the train dispatch center.

[0134] According to the present invention, a train remote information interaction device 400 is provided, wherein the signal strength of the multiple communication modules is determined based on the received signal strength indicator (RSSI) value; the interaction module 420 is further configured to: If the RSSI value of the LTE-4G mobile public network communication module is within a set threshold range, the LTE-4G mobile public network communication module is identified as the target communication module. When the RSSI value of the LTE-4G mobile public network communication module exceeds the set threshold range, the Tiantong narrowband satellite communication module is identified as the target communication module. If the signal quality of the Tiantong narrowband satellite communication module does not meet the data transmission conditions for the current location information of the train, the Beidou-3 regional short message communication module will be selected as the target communication module.

[0135] According to the present invention, in a train remote information interaction device 400, the data transmission priority of the multiple communication modules includes: The priority of the LTE-4G mobile public network communication module is higher than the priority of the Tiantong narrowband satellite communication module. The priority of the Tiantong narrowband satellite communication module is higher than that of the Beidou-3 regional short message communication module.

[0136] According to the present invention, a train remote information interaction device 400 is provided, wherein the interaction module 420 is further used for: If the BeiDou-3 regional short message communication module also fails to meet the data transmission conditions, the train's current location information will be stored locally. The signal quality of the LTE-4G mobile public network communication module, the Tiantong narrowband satellite communication module, and the Beidou-3 regional short message communication module are periodically queried to see if they meet the data transmission conditions. If any communication module meets the data transmission conditions, the untransmitted location data is reported to the train dispatch center through the communication module that meets the data transmission conditions.

[0137] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention, such as... Figure 5 As shown, the electronic device may include: a processor 510, a communications interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communications interface 520, and the memory 530 communicate with each other through the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute a train remote information interaction method. This method is applied to an onboard terminal in a train remote information interaction system, which includes the onboard terminal, a train dispatching center, and a ground terminal. The method includes: Real-time train location information; The system intelligently selects a target communication module based on the signal strength of multiple communication modules, and reports the train's current location information to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported train current location information is used by the train dispatch center to send the reported train current location information to the ground terminal, and the ground terminal uses the reported train current location information and preset rules to determine whether to trigger a train warning.

[0138] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0139] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the train remote information interaction method provided by the above methods. This method is applied to an on-board terminal in a train remote information interaction system, which includes the on-board terminal, a train dispatching center, and a ground terminal. The method includes: Real-time train location information; The system intelligently selects a target communication module based on the signal strength of multiple communication modules, and reports the train's current location information to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported train current location information is used by the train dispatch center to send the reported train current location information to the ground terminal, and the ground terminal uses the reported train current location information and preset rules to determine whether to trigger a train warning.

[0140] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the train telematics method provided by the above methods. This method is applied to an onboard terminal in a train telematics system, the train telematics system including the onboard terminal, a train dispatching center, and a ground terminal; the method includes: Real-time train location information; The system intelligently selects a target communication module based on the signal strength of multiple communication modules, and reports the train's current location information to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported train current location information is used by the train dispatch center to send the reported train current location information to the ground terminal, and the ground terminal uses the reported train current location information and preset rules to determine whether to trigger a train warning.

[0141] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0142] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0143] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for remote information exchange on trains, characterized in that, An onboard terminal used in a train remote information interaction system, the train remote information interaction system including the onboard terminal, a train dispatching center, and a ground terminal; the method includes: Real-time acquisition of train's current location information; The system intelligently selects a target communication module based on the signal strength of multiple communication modules, and reports the train's current location information to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported train current location information is used by the train dispatch center to send the reported train current location information to the ground terminal, and the ground terminal uses the reported train current location information and preset rules to determine whether to trigger a train warning.

2. The train remote information interaction method according to claim 1, characterized in that, The vehicle-mounted terminal includes an automatic location acquisition device, which integrates a BeiDou positioning module and an inertial navigation positioning module; the real-time acquisition of the train's current location information includes: The BeiDou positioning module is used first to obtain the train's current location information; When the train enters an area where the BeiDou signal is blocked, the inertial navigation and positioning module is automatically used to obtain the train's current location information.

3. The train remote information interaction method according to claim 1, characterized in that, The step of intelligently selecting a target communication module based on the signal strength of multiple communication modules, and reporting the train's current location information to the train dispatch center through the target communication module, includes: The target communication module is intelligently selected based on the data transmission priority and signal strength of the multiple communication modules. The target communication module reports the train's current location information to the train dispatch center.

4. The train remote information interaction method according to claim 3, characterized in that, The signal strength of the multi-communication module is determined based on the received signal strength indicator (RSSI) value. The step of intelligently selecting a target communication module based on the data transmission priority and signal strength of the multiple communication modules includes: If the RSSI value of the LTE-4G mobile public network communication module is within a set threshold range, the LTE-4G mobile public network communication module is identified as the target communication module. When the RSSI value of the LTE-4G mobile public network communication module exceeds the set threshold range, the Tiantong narrowband satellite communication module is identified as the target communication module. If the signal quality of the Tiantong narrowband satellite communication module does not meet the data transmission conditions for the current location information of the train, the Beidou-3 regional short message communication module will be selected as the target communication module.

5. The train remote information interaction method according to claim 3 or 4, characterized in that, The data transmission priority of the multi-communication module includes: The priority of the LTE-4G mobile public network communication module is higher than the priority of the Tiantong narrowband satellite communication module. The priority of the Tiantong narrowband satellite communication module is higher than that of the Beidou-3 regional short message communication module.

6. The train remote information interaction method according to claim 3 or 4, characterized in that, The method further includes: If the BeiDou-3 regional short message communication module also fails to meet the data transmission conditions, the train's current location information will be stored locally. The signal quality of the LTE-4G mobile public network communication module, the Tiantong narrowband satellite communication module, and the Beidou-3 regional short message communication module are periodically queried to see if they meet the data transmission conditions. If any communication module meets the data transmission conditions, the untransmitted location data is reported to the train dispatch center through the communication module that meets the data transmission conditions.

7. A train remote information interaction system, the train remote information interaction system comprising an onboard terminal, a train dispatching center, and a ground terminal; The on-board terminal is used to obtain the train's current location information in real time; The system intelligently selects a target communication module based on the signal strength of multiple communication modules, and reports the train's current location information to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The train dispatch center is used to send the reported current location information of the train to the ground terminal; The ground terminal is used to determine whether to trigger a train warning based on the reported current train location information and preset rules.

8. A train remote information interaction device, characterized in that, An onboard terminal used in a train remote information interaction system, the train remote information interaction system including the onboard terminal, a train dispatching center, and a ground terminal; the device includes: The acquisition module is used to acquire the train's current location information in real time. The interaction module is used to intelligently select a target communication module based on the signal strength of multiple communication modules, and report the current location information of the train to the train dispatch center through the target communication module. The multiple communication modules include an LTE-4G mobile public network communication module, a Tiantong narrowband satellite communication module, and a Beidou-3 regional short message communication module. The reported current location information of the train is used by the train dispatch center to send the reported current location information of the train to the ground terminal, and the ground terminal determines whether to trigger a train warning based on the reported current location information of the train and preset rules.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the train remote information interaction method as described in any one of claims 1 to 6.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the train remote information interaction method as described in any one of claims 1 to 6.

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