A method, device, module, vehicle, and medium for vehicle-to-ground communication switching.

Abstract

This application discloses a method, device, module, vehicle, and medium for switching train-to-ground communication, relating to the field of rail transit technology. The method includes: acquiring train control information through onboard train control equipment; determining the target communication standard corresponding to the train at the current route kilometer marker based on the train control information; the target communication standard being either public network communication or private network communication; if the target communication standard is public network communication, establishing a data channel with a ground public network server for train-to-ground communication via the public network; if the target communication standard is private network communication, establishing a data channel with a ground private network server for train-to-ground communication via the private network. By automatically determining the current route kilometer marker position based on the train control information, and then adaptively selecting the corresponding communication standard and establishing a data channel, automatic switching of the train-to-ground communication standard is achieved; this avoids the risk of communication interruption due to human error and improves the switching efficiency and reliability of train-to-ground communication.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a vehicle-to-ground communication switching method, device, module, vehicle, and medium. Background Technology

[0002] Currently, train-to-ground communication in rail transit information systems utilizes wireless cellular communication, primarily employing two communication standards: private networks and public networks (3G / 4G / 5G). In actual operation, both standards coexist. Existing technology necessitates the deployment of two independent devices—a private network communication module and a public network communication module—for long-distance trains spanning multiple communication standard coverage areas. Train attendants must manually switch between these two systems after stopping at specific stations, i.e., manually deactivating the current communication module and activating the other to switch between the public and private networks. This switching process cannot be automated and seamless, increasing the workload for train attendants; furthermore, the two communication modules also increase equipment costs. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a vehicle-to-ground communication handover method, apparatus, module, vehicle, and medium, which can improve the handover efficiency and reliability of vehicle-to-ground communication. The specific solution is as follows: In a first aspect, this application discloses a vehicle-to-ground communication handover method, including: Train control information is obtained through onboard train control equipment; Based on the train control information, the target communication system corresponding to the train under the current route kilometer marker is determined; the target communication system is public network communication or private network communication. If the target communication standard is public network communication, a data channel is established between the target and the ground public network server to enable vehicle-to-ground communication via the public network. If the target communication system is private network communication, a data channel is established between the target system and the ground private network server to enable vehicle-to-ground communication via the private network.

[0004] Optionally, obtaining train control information through onboard train control equipment includes: Periodically acquire Ethernet data packets sent by the on-board train control equipment; The Ethernet data packets are parsed to extract the train control information; the train control information includes line information and kilometer markers.

[0005] Optionally, determining the target communication standard corresponding to the train under the current route kilometer marker based on the train control information includes: The train control information is matched with a pre-stored route data table; the route data table contains a mapping relationship between kilometer markers and communication standards. The target communication standard corresponding to the current kilometer marker is determined based on the matching results.

[0006] Optionally, establishing a data channel with a terrestrial public network server includes: Configure the serial port communication parameters; Configure the wide area network interface, and obtain the Internet Protocol address through the wide area network interface using the Dynamic Host Configuration Protocol. Based on the Internet Protocol address, a communication link is established with the terrestrial public network server using a socket method.

[0007] Optionally, establishing a data channel with the terrestrial private network server includes: Lock the operating frequency to the dedicated frequency band of the private network; Perform the general packet radio service dialing procedure to access the private network; In the private network, a communication link is established with the static Internet Protocol address of the terrestrial private network server using a socket method.

[0008] Optionally, before establishing a data channel with the terrestrial public network server, the following steps are also included: If the target communication mode is public network communication and the current communication mode is private network communication, then disconnect the communication connection with the ground private network server and unlock the frequency band of the private network. Before establishing a data channel with the terrestrial private network server, the following steps are also included: If the target communication mode is private network communication and the current communication mode is public network communication, then the communication connection with the ground public network server is disconnected.

[0009] Secondly, this application discloses a vehicle-to-ground communication switching device, comprising: The train control information acquisition module is used to acquire train control information of the train through on-board train control equipment; The communication standard determination module is used to determine the target communication standard corresponding to the train under the current route kilometer marker based on the train control information; the target communication standard is public network communication or private network communication. The public network communication module is used to establish a data channel with the ground public network server if the target communication mode is public network communication, so as to conduct vehicle-to-ground communication through the public network; The private network communication module is used to establish a data channel with the ground private network server if the target communication mode is private network communication, so as to conduct vehicle-to-ground communication through the private network.

[0010] Thirdly, this application discloses a vehicle-to-ground communication module, comprising: The control module is used to determine the target communication mode corresponding to the train under the current route kilometer marker based on the train control information, and to send corresponding control commands to the wireless communication module according to the target communication mode; the target communication mode is public network communication or private network communication. An Ethernet communication module, connected to the control module, is used to communicate with the on-board train control equipment to obtain train control information; A wireless communication module, connected to the control module, is used to receive control commands from the control module and establish a data channel with a public terrestrial network server or a private terrestrial network server; the operating frequency band of the wireless communication module covers the public network communication frequency band. A radio frequency power amplifier, connected to the wireless communication module, is used to amplify the output signal of the wireless communication module under the private network communication standard, so that the transmission power of the wireless communication module in the private network communication frequency band meets the private network communication requirements. A radio frequency antenna, connected to the radio frequency power amplifier, is used to transmit and receive wireless signals.

[0011] Fourthly, this application discloses a rail transit vehicle, comprising: The aforementioned vehicle-to-ground communication module; Vehicle-mounted train control equipment connected to the vehicle-to-ground communication module.

[0012] Fifthly, this application discloses a computer-readable storage medium for storing a computer program; wherein the computer program, when executed by a processor, implements the aforementioned vehicle-to-ground communication switching method.

[0013] In this application, train control information is obtained through onboard train control equipment. Based on the train control information, the target communication mode corresponding to the train at the current route kilometer marker is determined. The target communication mode is either public network communication or private network communication. If the target communication mode is public network communication, a data channel is established with a ground public network server to enable train-to-ground communication via the public network. If the target communication mode is private network communication, a data channel is established with a ground private network server to enable train-to-ground communication via the private network. Therefore, by automatically determining the current route kilometer marker position based on the train control information, and then adaptively selecting the corresponding communication mode and establishing a data channel, automatic switching of the train-to-ground communication mode is achieved. This eliminates the need for manual judgment and switching, reducing the workload of train crew members compared to the practice of manually switching communication devices after stopping at specific stations. It also avoids the risk of communication interruption due to human error and improves the switching efficiency and reliability of train-to-ground communication. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 A flowchart of a vehicle-to-ground communication handover method provided in this application; Figure 2 A flowchart illustrating a specific vehicle-to-ground communication handover method provided in this application; Figure 3 A schematic diagram of a vehicle-to-ground communication switching module provided in this application; Figure 4 This is a schematic diagram of a vehicle-to-ground communication switching system provided in this application. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In existing technologies, two separate devices, a private network communication module and a public network communication module, are deployed. Flight attendants need to manually switch between them after the train stops at a specific station, that is, manually turn off the current communication module and turn on the other communication module to achieve the switch between the public and private networks. The switching process cannot be automatic and seamless, and it increases the workload of flight attendants; at the same time, the two communication modules also increase equipment costs.

[0018] To overcome the above problems, this application discloses a vehicle-to-ground communication handover method, relating to the field of rail transit. Rail transit refers to a general term for a type of transportation in which trains travel on specific tracks, including high-speed rail, conventional trains, urban rail transit, and suburban railways. Vehicle-to-ground communication refers to the information exchange between the train and fixed ground facilities, including stations, dispatch centers, and base stations along the line.

[0019] See Figure 1 As shown, the method may include the following steps: Step S11: Obtain train control information through onboard train control equipment.

[0020] First, train control information is obtained through onboard train control equipment, specifically in real-time. Onboard train control equipment refers to devices installed on the train for monitoring train operation, such as LKJ (Train Operation Monitoring and Recording Device) or ATP (Automatic Train Protection). Train control information can include the train's identity information and operating status information, such as the current railway bureau, locomotive number, train number, route number, and kilometer markers. Kilometer markers are dedicated mileage markers used in rail transit to identify the location of a line, indicating the distance in kilometers from the starting point of the line.

[0021] In some embodiments, obtaining train control information via onboard train control equipment includes: periodically acquiring Ethernet data packets sent by the onboard train control equipment; parsing the Ethernet data packets to extract the train control information; the train control information includes line information and kilometer markers. Specifically, the Ethernet communication module in the onboard vehicle-to-ground communication module establishes a wired communication connection with the onboard train control equipment and periodically acquires Ethernet IP communication data packets sent by the onboard train control equipment. The control module in the vehicle-to-ground communication module parses the received Ethernet data packets and extracts the train control information according to a preset data protocol. The train control information includes, but is not limited to, the current railway bureau (i.e., the railway bureau to which the train currently belongs), locomotive number, train number, and kilometer markers. By periodically acquiring Ethernet data packets from the train control equipment and extracting train control information, real-time tracking of the train's position and operating status is achieved, thereby improving the accuracy and timeliness of target traffic system judgment. Simultaneously, utilizing the existing Ethernet communication interface, data interaction with the train control equipment can be achieved without adding additional hardware, reducing complexity and cost.

[0022] Step S12: Based on the train control information, determine the target communication system corresponding to the train under the current route kilometer marker; the target communication system is public network communication or private network communication.

[0023] The current route kilometer marker can be determined based on the current route information and kilometer markers; alternatively, the current travel route can be determined based on the railway bureau and train number, and then the current route kilometer marker can be used to determine the current route kilometer marker. The precise position of the train on the track can be determined based on the route kilometer marker. The target communication standard can be a public network communication standard (such as 3G / 4G / 5G public network) or a private network communication standard (such as GSM-R private network). It is understandable that different railway sections pre-determine different communication standard coverage schemes based on geographical environment and actual needs; for example, in sparsely populated mountainous or Gobi desert areas where public network operators have not deployed signal coverage, a private network is pre-planned and deployed to ensure train-to-ground communication; in densely populated areas where public network signal coverage is good, communication can be relied upon to reduce costs. Therefore, it is necessary to determine whether a public network or a private network is pre-determined for that location based on the train's current location. For example, when a train reaches the K200 kilometer marker on the Qinghai-Tibet Railway, the system identifies that it has entered the private network coverage area based on the kilometer marker, and the target communication mode is private network communication. At this time, the private network access process is automatically triggered.

[0024] For example Figure 2 As shown, the communication standard is first determined based on the train control information, and then communication is established using the corresponding communication connection establishment method according to the determined communication standard.

[0025] The step of determining the target communication standard corresponding to the train at the current kilometer marker based on the train control information includes: matching the train control information with a pre-stored line data table; the line data table contains the mapping relationship between kilometer markers and communication standards; and determining the target communication standard corresponding to the current kilometer marker based on the matching result. The communication standards used on different sections are predetermined by the railway department based on factors such as the line's geographical environment, public network coverage, and private network deployment, and are not dynamically changing. Therefore, the communication standards corresponding to each kilometer marker section along the entire line can be pre-defined in the system in the form of a data table.

[0026] In other words, this application determines the communication mode by querying the line data table based on the train's location, rather than by scanning the signal strength of surrounding base stations in real time. Signal scanning results in high latency and instability in signal boundary areas, leading to repeated handovers. Directly determining the communication mode by querying a pre-stored table based on the route kilometer markers offers faster response times and higher accuracy, improving the reliability and stability of handover.

[0027] Step S13: If the target communication standard is public network communication, then establish a data channel with the ground public network server to conduct vehicle-to-ground communication through the public network.

[0028] If the target communication standard is a public network communication standard, a data channel is established between the onboard communication device and the ground public network server, enabling the train to communicate with the ground via the public network and transmit business data such as train operation status data, dispatching commands, and video monitoring. The ground public network server refers to server equipment deployed in the public network, responsible for receiving and processing access requests and business data from the train.

[0029] Before establishing a data channel with the ground public network server, the process includes: if the target communication standard is public network communication and the current communication standard is private network communication, then disconnecting the communication connection with the ground private network server and unlocking the frequency band lock on the private network's dedicated frequency band. That is, when the target communication standard is public network communication and the current communication standard is private network communication, it indicates that the train is about to leave the private network coverage area and enter the public network coverage area, so the private network connection is disconnected first. Specific disconnection operations may include: stopping the transmission of private network service data streams; closing the Socket connection with the ground private network server to release application layer resources; terminating the GPRS dial-up connection to release data link layer resources; and terminating the PPP session if the wireless communication module is connected via the PPP protocol.

[0030] In a preferred embodiment, establishing a data channel with a terrestrial public network server may include the following steps: S201: Configure serial port communication parameters. The serial port is the physical communication interface between the control module and the wireless communication module. Serial port configuration includes interface attributes and flow settings, such as baud rate, parity, and flow control, to ensure correct command exchange and data transmission between the control module and the wireless communication module. Specifically, it enables the control module to send AT commands (Attention Commands, a set of commands used to control the modem) and receive responses from the wireless communication module via the serial port, as well as to perform PPP (Point-to-Point Protocol) data communication.

[0031] S202: Configure the WAN interface and obtain an Internet Protocol (IP) address through the WAN interface using Dynamic Host Configuration Protocol (DHCP). The WAN interface is the logical network interface generated in the control module after the wireless communication module successfully connects to the public network, used to connect to the external wide area network. In public network mode, the WAN interface can automatically obtain an IP address using DHCP. After serial port configuration, the wireless communication module triggers a dial-up connection via AT commands. Once the dial-up is successful and the PPP link is established, the wireless communication module obtains an IP address from the public network base station, which is then assigned to the WAN interface in the operating system.

[0032] S203: Based on the Internet Protocol address, establish a communication link with the ground public network server using a socket method. Through the socket method, the control module can establish a TCP (Transmission Control Protocol) or UDP (User Datagram Protocol) connection with the ground public network server's IP address and a specific port number, enabling bidirectional data communication. A successful socket connection indicates that a data channel has been established between the train and the ground public network server, allowing the train to send and receive service data through this channel.

[0033] Step S14: If the target communication mode is private network communication, then establish a data channel with the ground private network server to conduct vehicle-to-ground communication through the private network.

[0034] If the target communication standard is a private network communication standard, a data channel is established between the onboard communication device and the ground private network server, enabling the train to communicate with the ground via the private network. The ground private network server refers to server equipment deployed in the railway's dedicated network, which typically has a static IP address and is responsible for receiving and processing access requests and service data from the train.

[0035] As can be seen, the system no longer relies on manual judgment and switching of communication modes. Instead, it automatically determines the current location of the route kilometer marker based on the train's own train control information, and then adaptively selects the corresponding communication mode and establishes a data channel, achieving automatic switching of train-to-ground communication modes. Compared to the practice of requiring crew members to manually switch communication devices after stopping at specific stations, this reduces the workload of crew members, avoids the risk of communication interruptions due to human error, and improves the switching efficiency and reliability of train-to-ground communication.

[0036] Before establishing a data channel with the ground-based private network server, the process includes: if the target communication standard is private network communication and the current communication standard is public network communication, then disconnecting the communication connection with the ground-based public network server. That is, when the target communication standard is private network communication and the current communication standard is public network communication, it indicates that the train is about to enter the private network coverage area. Before executing the private network access procedure, the communication connection with the ground-based public network server is disconnected. Specifically, disconnection may include the following operations: stopping the transmission of public network service data streams; closing the Socket connection with the ground-based public network server, releasing application layer resources; releasing the IP address obtained through DHCP; and closing the network interface, releasing network layer resources.

[0037] In a preferred embodiment, establishing a data channel with the terrestrial private network server may include: S301: Lock the operating frequency to the dedicated frequency band of the private network. This can be understood as follows: GSM-R (GSM for Railway) has strict requirements on operating frequency bands. Therefore, to access the GSM-R private network, the wireless communication module must be able to operate on this dedicated frequency band. However, under public networks, the wireless communication module detects the signal modes and signal strength of surrounding base stations and automatically selects the mode and frequency band with the strongest signal. Therefore, in the private network area, it is necessary to forcibly lock the dedicated frequency band to prevent the wireless communication module from automatically selecting other standards. Specifically, the control module sends a frequency band locking command to the wireless communication module via serial port, causing the wireless communication module to only scan and reside on the dedicated frequency band of the private network, refusing to communicate on other frequency bands. For example, the frequency band locking command can be the AT command "AT+CBAND=EGSM_MODE", which locks the operating frequency band of the wireless communication module to the E-GSM band (900MHz), which includes the 930-934MHz band used by GSM-R. Of course, the band locking command can be any control command that can restrict the wireless communication module to a specific frequency band or a specific frequency point.

[0038] S302: Execute the General Packet Radio Service (GPRS) dial-up procedure to access the private network. This means accessing the private network via PPP dial-up using General Packet Radio Service (GPRS). GPRS is the primary method for data transmission in the GSM-R system, although other supported methods are also possible.

[0039] S303: In the private network, a communication link is established with the static Internet Protocol address of the ground private network server using a socket method.

[0040] Finally, a communication link was established with the ground GSM-R server using a socket connection, thus creating a data channel between the vehicle-mounted communication device and the ground GSM-R server.

[0041] By locking onto a dedicated frequency band for the private network and combining it with the general packet radio service dialing process, the automatic establishment of the private network data channel is achieved. It's understandable that the wireless communication module can use a public network-compatible module, which inherently possesses wideband coverage capabilities, including the frequency bands used by GSM-R, but it defaults to scanning for and connecting to the strongest signal. Therefore, by forcibly locking the frequency band, the module, which should be operating in public network mode, can function normally on the private network frequency band without needing to replace the dedicated module. This allows a system that originally required two sets of communication devices to be streamlined into a single device, reducing equipment costs and space occupation, while ensuring the stability and reliability of private network communication.

[0042] As can be seen from the above, in this embodiment, the current location of the route kilometer marker is automatically determined based on the train control information, and then the corresponding communication mode is adaptively selected and a data channel is established, realizing the automatic switching of the train-to-ground communication mode. It does not rely on manual judgment and manual switching. Compared with the practice of requiring the crew to manually switch the communication device after stopping at a specific station, it reduces the workload of the crew, avoids the risk of communication interruption due to human operation errors, and improves the switching efficiency and reliability of train-to-ground communication.

[0043] Accordingly, embodiments of this application also disclose a vehicle-to-ground communication switching device, which is a virtual device, comprising: The train control information acquisition module is used to acquire train control information of the train through on-board train control equipment; The communication standard determination module is used to determine the target communication standard corresponding to the train under the current route kilometer marker based on the train control information; the target communication standard is public network communication or private network communication. The public network communication module is used to establish a data channel with the ground public network server if the target communication mode is public network communication, so as to conduct vehicle-to-ground communication through the public network; The private network communication module is used to establish a data channel with the ground private network server if the target communication mode is private network communication, so as to conduct vehicle-to-ground communication through the private network.

[0044] The train control information acquisition module is used to periodically acquire Ethernet data packets sent by the on-board train control equipment; parse the Ethernet data packets to extract the train control information; the train control information includes line information and kilometer markers.

[0045] The communication standard determination module is used to match the train control information with a pre-stored route data table; the route data table contains a mapping relationship between kilometer markers and communication standards. The target communication standard corresponding to the current kilometer marker is determined based on the matching results.

[0046] The public network communication module is used to configure the communication parameters of the serial port; configure the wide area network interface, and obtain the Internet Protocol address through the wide area network interface using the Dynamic Host Configuration Protocol; and establish a communication link with the ground public network server using the socket method based on the Internet Protocol address.

[0047] The private network communication module is used to lock the operating frequency to the dedicated frequency band of the private network; execute the general packet radio service dialing process to access the private network; and establish a communication link with the static Internet Protocol address of the ground private network server in the private network using a socket method.

[0048] The private network communication module is used to disconnect the communication connection with the ground private network server and release the frequency band lock on the private network dedicated frequency band before establishing a data channel with the ground public network server, if the target communication mode is public network communication and the current communication mode is private network communication. The public network communication module is used to disconnect the communication connection with the ground public network server before establishing a data channel with the ground private network server, if the target communication mode is private network communication and the current communication mode is public network communication.

[0049] Furthermore, embodiments of this application also disclose a vehicle-to-ground communication module, for example... Figure 3 As shown, the content in the figure should not be construed as limiting the scope of this application. The module includes: Control module 11 is used to determine the target communication mode corresponding to the train under the current route kilometer mark based on the train control information, and to send corresponding control commands to the wireless communication module according to the target communication mode; the target communication mode is public network communication or private network communication; Ethernet communication module 12, connected to the control module, is used to communicate with the on-board train control equipment to obtain train control information; The wireless communication module 13 is connected to the control module and is used to receive control commands from the control module and establish a data channel with a public terrestrial network server or a private terrestrial network server; the operating frequency band of the wireless communication module covers the public network communication frequency band. The radio frequency power amplifier 14 is connected to the wireless communication module and is used to amplify the output signal of the wireless communication module under the private network communication standard so that the transmission power of the wireless communication module in the private network communication frequency band meets the private network communication requirements. The radio frequency antenna 15 is connected to the radio frequency power amplifier and is used to transmit and receive wireless signals.

[0050] Compared to existing technologies that require two vehicle-to-ground communication modules per train, this application only requires one vehicle-to-ground communication module, thus saving costs.

[0051] The wireless communication module 13 operates in a frequency band that covers the public network communication frequency band, and some of its frequency bands overlap or are adjacent to the private network communication frequency band; this ensures that the private network communication requirements can be met after passing through the radio frequency power amplifier.

[0052] In some embodiments, the Ethernet communication module 12 is used to periodically acquire Ethernet data packets sent by the on-board train control equipment; The control module 11 is used to parse the Ethernet data packets and extract the train control information; the train control information includes line information and kilometer markers.

[0053] In some embodiments, the control module 11 is configured to match the line information and kilometer markers in the train control information with a pre-stored line data table; the line data table at least contains a mapping relationship between line information, kilometer marker range and communication standard; The control module 11 is used to determine the target communication system corresponding to the current kilometer marker based on the matching result.

[0054] In some embodiments, the control module 11 is configured to configure the communication parameters of the serial port if the target communication standard is public network communication; configure the wide area network interface, and obtain the Internet Protocol address through the wide area network interface using the Dynamic Host Configuration Protocol. The control module 11 and the wireless communication module 13 are used to establish a communication link with the terrestrial public network server using a socket method based on the Internet Protocol address.

[0055] In some embodiments, the control module 11 is used to send a frequency band locking command to the wireless communication module 13 via a serial port if the target communication mode is private network communication, so as to lock the operating frequency to the private network dedicated frequency band. Wireless communication module 13 is used to receive and execute the frequency band locking command; Control module 11 and wireless communication module 13 are used to execute the general packet radio service dialing process to access the private network; The control module 11 and the wireless communication module 13 are used to establish a communication link with the static Internet Protocol address of the terrestrial private network server in the private network using a socket method.

[0056] In some embodiments, the control module 11 is configured to, before establishing a data channel with the ground public network server, disconnect the communication connection with the ground private network server and release the frequency band lock on the private network dedicated frequency band if the target communication mode is public network communication and the current communication mode is private network communication; and before establishing a data channel with the ground private network server, disconnect the communication connection with the ground public network server if the target communication mode is private network communication and the current communication mode is public network communication.

[0057] Accordingly, this application also discloses a rail transit vehicle, including: the above-mentioned vehicle-to-ground communication module; and on-board train control equipment connected to the vehicle-to-ground communication module.

[0058] Accordingly, embodiments of this application also disclose a vehicle-to-ground communication handover system, for example... Figure 4 As shown, the system includes the aforementioned rail transit vehicles, as well as private network servers and public network servers.

[0059] Furthermore, this application also discloses a computer storage medium storing computer-executable instructions. When the computer-executable instructions are loaded and executed by a processor, they implement the vehicle-to-ground communication handover method steps disclosed in any of the foregoing embodiments.

[0060] Furthermore, this application also discloses a computer program product, including a computer program that, when executed by a processor, implements the vehicle-to-ground communication handover method steps disclosed in any of the foregoing embodiments.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0062] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0063] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] The present invention provides a detailed description of a vehicle-to-ground communication switching method, device, module, vehicle, and medium. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A vehicle-to-ground communication handover method, characterized in that, include: Train control information is obtained through onboard train control equipment; Based on the train control information, the target communication system corresponding to the train under the current route kilometer marker is determined; the target communication system is public network communication or private network communication. If the target communication standard is public network communication, a data channel is established between the target and the ground public network server to enable vehicle-to-ground communication via the public network. If the target communication system is private network communication, a data channel is established between the target system and the ground private network server to enable vehicle-to-ground communication via the private network.

2. The vehicle-to-ground communication handover method according to claim 1, characterized in that, The acquisition of train control information through onboard train control equipment includes: Periodically acquire Ethernet data packets sent by the on-board train control equipment; The Ethernet data packets are parsed to extract the train control information; the train control information includes line information and kilometer markers.

3. The vehicle-to-ground communication handover method according to claim 1, characterized in that, The step of determining the target communication standard corresponding to the train under the current route kilometer marker based on the train control information includes: The train control information is matched with a pre-stored route data table; the route data table contains a mapping relationship between kilometer markers and communication standards. The target communication standard corresponding to the current kilometer marker is determined based on the matching results.

4. The vehicle-to-ground communication handover method according to claim 1, characterized in that, The establishment of a data channel with the ground public network server includes: Configure the serial port communication parameters; Configure the wide area network interface, and obtain the Internet Protocol address through the wide area network interface using the Dynamic Host Configuration Protocol. Based on the Internet Protocol address, a communication link is established with the terrestrial public network server using a socket method.

5. The vehicle-to-ground communication handover method according to claim 1, characterized in that, The establishment of a data channel with the terrestrial private network server includes: Lock the operating frequency to the dedicated frequency band of the private network; Perform the general packet radio service dialing procedure to access the private network; In the private network, a communication link is established with the static Internet Protocol address of the terrestrial private network server using a socket method.

6. The vehicle-to-ground communication handover method according to claim 1, characterized in that, Before establishing a data channel with the public network server on the ground, the following steps are also included: If the target communication mode is public network communication and the current communication mode is private network communication, then disconnect the communication connection with the ground private network server and unlock the frequency band of the private network. Before establishing a data channel with the terrestrial private network server, the following steps are also included: If the target communication mode is private network communication and the current communication mode is public network communication, then the communication connection with the ground public network server is disconnected.

7. A vehicle-to-ground communication switching device, characterized in that, include: The train control information acquisition module is used to acquire train control information of the train through on-board train control equipment; The communication standard determination module is used to determine the target communication standard corresponding to the train under the current route kilometer marker based on the train control information; the target communication standard is public network communication or private network communication. The public network communication module is used to establish a data channel with the ground public network server if the target communication mode is public network communication, so as to conduct vehicle-to-ground communication through the public network; The private network communication module is used to establish a data channel with the ground private network server if the target communication mode is private network communication, so as to conduct vehicle-to-ground communication through the private network.

8. A vehicle-to-ground communication module, characterized in that, The vehicle-to-ground communication module is used to implement the vehicle-to-ground communication handover method as described in any one of claims 1 to 6, including: The control module is used to determine the target communication system corresponding to the train under the current route kilometer marker based on the train control information, and to send corresponding control commands to the wireless communication module according to the target communication system; the target communication system is public network communication or private network communication. An Ethernet communication module, connected to the control module, is used to communicate with the on-board train control equipment to obtain train control information; A wireless communication module, connected to the control module, is used to receive control commands from the control module and establish a data channel with a public terrestrial network server or a private terrestrial network server; the operating frequency band of the wireless communication module covers the public network communication frequency band. A radio frequency power amplifier, connected to the wireless communication module, is used to amplify the output signal of the wireless communication module under the private network communication standard, so that the transmission power of the wireless communication module in the private network communication frequency band meets the private network communication requirements. A radio frequency antenna, connected to the radio frequency power amplifier, is used to transmit and receive wireless signals.

9. A rail transit vehicle, characterized in that, include: The vehicle-to-ground communication module as described in claim 8; Vehicle-mounted train control equipment connected to the vehicle-to-ground communication module.

10. A computer-readable storage medium, characterized in that, Used to store computer programs; wherein the computer programs, when executed by a processor, implement the vehicle-to-ground communication switching method as described in any one of claims 1 to 6.

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