Railway vehicle communication network system and railway vehicle communication method

Abstract

The present application relates to the field of rail transit communication, and discloses a rail vehicle communication network system and a rail vehicle communication method, which comprise a radio system, a passenger information system and a vehicle control system; the radio system comprises a vehicle-mounted radio system control unit, a TETRA antenna and an LTE antenna; the vehicle-mounted radio system control unit is used for carrying out train-ground communication through the TETRA antenna and the LTE antenna; the passenger information system comprises a passenger information system control unit, a passenger information system switch and a passenger information system terminal device; the vehicle control system comprises a vehicle control system control unit and a vehicle control system switch; wherein the passenger information system control unit and the vehicle control system control unit are both used for carrying out train-ground data interaction through the vehicle-mounted radio system control unit. In this way, the whole vehicle network architecture can be simplified, the equipment cost and failure rate can be reduced, and the transmission requirements of narrowband high-reliability voice and wideband multimedia data can be met.

Description

Technical Field

[0001] This invention relates to the field of rail transit communication, and in particular to a rail vehicle communication network system and a rail vehicle communication method. Background Technology

[0002] In the field of rail transit communication, vehicle-to-ground communication systems are critical infrastructure for ensuring safe vehicle operation and efficient dispatching. Traditional vehicle-to-ground communication architectures typically employ a single communication standard, with each functional subsystem independently deploying communication equipment, forming isolated communication links. Narrowband communication systems have limited data transmission capabilities, making it difficult to support the transmission needs of large data volumes; broadband communication systems struggle to guarantee the reliability of voice communication during network congestion. Furthermore, in traditional solutions, the radio system, passenger information system, and vehicle control system each have independent communication interfaces and transmission links, resulting in a complex overall vehicle network architecture, high equipment redundancy, and a lack of effective data exchange channels between subsystems, hindering information sharing and collaborative processing. This distributed architecture not only increases the weight and energy consumption of the entire vehicle but also raises equipment failure rates and maintenance costs, making it difficult to meet the management requirements of modern rail transit for lightweight, integrated, and intelligent operation. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a rail vehicle communication network system and rail vehicle communication method, which can simplify the overall vehicle network architecture, reduce equipment costs and failure rates, and take into account the transmission requirements of narrowband high-reliability voice and broadband multimedia data.

[0004] To solve the above-mentioned technical problems, the present invention provides a rail vehicle communication network system, comprising: A radio system includes an onboard radio system control unit, a TETRA antenna, and an LTE antenna; the onboard radio system control unit is used for vehicle-to-ground communication via the TETRA antenna and the LTE antenna. The passenger information system includes a passenger information system control unit, a passenger information system switch, and a passenger information system terminal device; the passenger information system control unit is connected to both the passenger information system switch and the vehicle-mounted radio system control unit; the passenger information system terminal device is connected to the passenger information system switch. The vehicle control system includes a vehicle control system control unit and a vehicle control system switch; the vehicle control system control unit is connected to the vehicle control system switch and the vehicle radio system control unit, respectively. The passenger information system control unit and the vehicle control system control unit are both used for vehicle-to-ground data interaction through the vehicle-mounted radio system control unit.

[0005] To address the aforementioned technical problems, the present invention also provides a rail vehicle communication method, applied to the aforementioned rail vehicle communication network system, comprising: The ground control center transmits audio data via the ground rail TETRA network to the TETRA control unit in the vehicle radio system control unit for encoding and decoding, and then distributes it to the passenger information system terminal equipment for playback via the passenger information system control unit. The business data generated by the passenger information system is aggregated through the passenger information system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the on-board radio system control unit through the ground rail LTE network. The business data generated by the vehicle control system is aggregated through the vehicle control system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the on-board radio system control unit through the ground rail LTE network.

[0006] The beneficial effects of this invention are as follows: The above-mentioned rail vehicle communication network system provided by this invention achieves dual-mode vehicle-to-ground communication by integrating TETRA and LTE antennas through the onboard radio system control unit. It can automatically detect the network signal strength, quality, and service requirements of the current environment, and utilize the characteristics of TETRA and LTE standards and network data transmission to achieve efficient and secure communication between the vehicle and the ground. The passenger information system control unit is connected to both the passenger information system switch and the onboard radio system control unit, and the passenger information system terminal equipment is connected to the passenger information system switch. This allows service data generated by the passenger information system to be aggregated through the passenger information system switch and then transmitted to the ground via the LTE channel in the onboard radio system control unit, achieving coordinated in-vehicle information distribution and vehicle-to-ground data interaction, effectively improving operational efficiency and passenger experience. The vehicle control system control unit is connected to both the vehicle control system switch and the onboard radio system control unit, enabling efficient and secure communication between the vehicle and the ground. The critical operational data generated by the vehicle control system can be aggregated through the vehicle control system switch and transmitted to the ground via the LTE channel in the onboard radio system control unit. This enables real-time monitoring of vehicle status and meets the diverse business needs of rail transit systems that require interconnection between different lines, such as cross-line operation and multi-line coordinated scheduling. Both the passenger information system control unit and the vehicle control system control unit are used for vehicle-to-ground data interaction through the onboard radio system control unit. This allows the radio system, passenger information system, and vehicle control system to interact and connect closely. This not only simplifies vehicle design, saves on radio switch costs, and streamlines the overall vehicle equipment and network architecture, but also improves the integration of vehicle subsystems and reduces system failure rates. It provides an integrated, highly available, and standardized vehicle-to-ground communication solution for metro, light rail, intercity, and heavy-haul railways, enabling seamless switching between different lines and more efficient network-wide operation management. This provides a solid foundation for the application of rail transit vehicle communication systems.

[0007] Furthermore, the present invention also provides a corresponding communication method and electronic device for a rail vehicle communication network system, which has the same or corresponding technical features as the aforementioned rail vehicle communication network system, further making the aforementioned rail vehicle communication network system more practical. The communication method and electronic device have corresponding advantages. Attached Figure Description

[0008] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of a rail vehicle communication network system provided in an embodiment of the present invention; Figure 2 A schematic diagram of the framework for dual-mode vehicle-to-ground communication in a rail vehicle communication network system provided in an embodiment of the present invention; Figure 3 A schematic diagram of the transmission channel process of the ground voice and passenger information system provided in an embodiment of the present invention; Figure 4 A schematic diagram of the data flow between the passenger information system and the ground transmission channel provided in an embodiment of the present invention; Figure 5 A schematic diagram of a radio data interaction channel provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of a vehicle control system data transmission channel provided in an embodiment of the present invention; Figure 7 A flowchart of a rail vehicle communication method provided in an embodiment of the present invention. Detailed Implementation

[0010] 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 of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0011] It should be noted that, in the description of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a 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. The terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not used to describe a set order or sequence.

[0012] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] An embodiment of the present invention provides a communication network system for rail vehicles. Figure 1 This is a schematic diagram of the structure of a rail vehicle communication network system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the rail vehicle communication network system includes: The radio system includes an onboard radio system control unit 11, a TETRA (Terrestrial Trunked Radio) antenna 12, and an LTE (Long Term Evolution) antenna 13; the onboard radio system control unit 11 is used for vehicle-to-ground communication via the TETRA antenna 12 and the LTE antenna 13. The passenger information system includes a passenger information system control unit 21, a passenger information system switch 22, and a passenger information system terminal device 23; the passenger information system control unit 21 is connected to the passenger information system switch 22 and the vehicle radio system control unit 11 respectively; the passenger information system terminal device 23 is connected to the passenger information system switch 22. The vehicle control system includes a vehicle control system control unit 31 and a vehicle control system switch 32; the vehicle control system control unit 31 is connected to the vehicle control system switch 32 and the vehicle radio system control unit 11 respectively. The passenger information system control unit 21 and the vehicle control system control unit 31 are both used for vehicle-to-ground data interaction through the vehicle radio system control unit 11.

[0014] It should be noted that the vehicle radio system control unit 11 can be used for voice-type vehicle-to-ground communication via TETRA antenna 12 and data-type vehicle-to-ground communication via LTE antenna 13.

[0015] The passenger information system control unit 21 can be used to drive the passenger information system terminal device 23 to distribute in-vehicle information through the passenger information system switch 22, and to conduct vehicle-to-ground data interaction through the vehicle radio system control unit 11. Specifically, the passenger information system control unit 21 is used to distribute ground audio data received by the vehicle radio system control unit 11 to the passenger information system terminal device 23 for playback, and to forward the in-vehicle audio data and image data collected by the passenger information system terminal device 23 to the vehicle radio system control unit 11.

[0016] The vehicle control system can be a train control and management system (TCMS). The vehicle control system control unit 31 can be used to aggregate vehicle operation data through the vehicle control system switch 32 and to perform vehicle-to-ground data interaction through the onboard radio system control unit 11. Specifically, the vehicle control system control unit 31 can be used to aggregate key vehicle operation data through the vehicle control system switch 32 and then forward it to the onboard radio system control unit 11.

[0017] In the rail vehicle communication network system provided in this embodiment of the invention, dual-mode vehicle-to-ground communication is achieved by integrating a TETRA antenna 12 and an LTE antenna 13 into the onboard radio system control unit 11. This system can automatically detect the network signal strength, quality, and service requirements of the current environment. Utilizing the characteristics of TETRA and LTE standards and network data transmission, and through the design and reasonable configuration of the dual-mode system architecture, efficient and secure communication between the vehicle and the ground is achieved. The passenger information system control unit 21 is connected to both the passenger information system switch 22 and the onboard radio system control unit 11. The passenger information system terminal device 23 is connected to the passenger information system switch 22, allowing service data generated by the passenger information system to be aggregated through the passenger information system switch 22 and then transmitted to the ground via the LTE channel in the onboard radio system control unit 11. This achieves coordination between in-vehicle information distribution and vehicle-to-ground data interaction, effectively improving operational efficiency and passenger experience. The vehicle control system control unit 31 is connected to both the vehicle control system switch 32 and the onboard radio system control unit 11. The connection of the control unit 11 allows critical operational data generated by the vehicle control system to be aggregated through the vehicle control system switch 32 and then transmitted to the ground via the LTE channel in the onboard radio system control unit 11. This enables real-time monitoring of vehicle status and meets the diverse business needs of rail transit for interconnection between different lines, such as cross-line operation and multi-line coordinated scheduling. The passenger information system control unit 21 and the vehicle control system control unit 31 are both used for vehicle-to-ground data interaction through the onboard radio system control unit 11, thereby enabling the radio system, passenger information system, and vehicle control system to interact and connect closely. This not only meets the requirements of simplified vehicle design, saves the cost of radio switches, simplifies the overall vehicle equipment and network architecture, improves the integration of vehicle subsystems, and reduces system failure rate, but also provides an integrated, highly available, and standardized vehicle-to-ground communication solution for metro, light rail, intercity, and heavy-haul railways. It enables seamless switching between different lines and more efficient network-wide operation management, providing a solid foundation for the application of rail transit vehicle communication systems.

[0018] It should be noted that the vehicle radio system control unit 11 can ensure compatibility with third-party base stations and core networks through TCCA (TETRA and Key Communications Association) interoperability certification, and uses the TETRA encryption system to ensure the reliability and confidentiality of command voice in complex electromagnetic environments.

[0019] Furthermore, in a specific implementation, in the above-described rail vehicle communication network system provided in this embodiment of the invention, the on-board radio system control unit 11 may include a TETRA control unit, an LTE control unit, and a communication mode selection module; the TETRA control unit is connected to the TETRA antenna 12, and the LTE control unit is connected to the LTE antenna 13. The communication mode selection module can be used to identify the type of vehicle-to-ground transmission service and control the start / stop switching of the TETRA control unit and the LTE control unit, intelligently selecting the optimal communication standard according to a preset strategy.

[0020] In implementation, the vehicle-mounted radio system control unit 11 integrates both TETRA and LTE communication units. Both parties can change the communication mode according to the vehicle-to-ground transmission service situation. Through intelligent switching strategy, it can give full play to the high-efficiency voice transmission quality of TETRA, and realize high-speed and high-capacity vehicle-to-ground data transmission channel through LTE network.

[0021] The ground control center can transmit audio data via the ground rail TETRA network to the TETRA control unit in the vehicle radio system control unit 11 for encoding and decoding through the vehicle TETRA antenna 12, and then distribute it to the passenger information system terminal device 23 for playback through the passenger information system control unit 21.

[0022] After the business data generated by the passenger information system is aggregated through the passenger information system switch 22, it can be transmitted to the ground control center via the ground rail LTE network through the LTE control unit and LTE antenna 13 in the vehicle radio system control unit 11 under the control of the communication mode selection module.

[0023] After the business data generated by the vehicle control system is aggregated through the vehicle control system switch 32, it can be transmitted to the ground control center via the ground rail LTE network through the LTE control unit and LTE antenna 13 in the vehicle radio system control unit 11 under the control of the communication mode selection module.

[0024] The TETRA control unit supports voice and short data services as specified in the ETSI EN 300 392 series standards, including group calls, individual calls, broadcasts, emergency calls, and SDS status / text message transmission. It can also encrypt voice services using the end-to-end encryption mechanism defined by the TETRA standard. The LTE control unit follows the 3GPP standard framework, supporting push-to-talk voice, high-definition video backhaul, and structured data interaction. It allocates bandwidth based on IMS-SIP and eMBMS multicast bearers and can encrypt data services using 3GPP-defined service priority (QoS) templates and end-to-end encryption mechanisms. During call establishment, it performs millisecond-level authentication based on the IMS-SIP protocol and can automatically allocate bandwidth between IMS-SIP and eMBMS multicast bearers according to priority policies. It establishes calls in milliseconds and ensures the security and bandwidth reservation of the command and dispatch link, covering all MCX application scenarios.

[0025] This invention can simultaneously and deeply comply with the full set of 3GPP MCX and ETSI TETRA specifications. The TETRA control unit and LTE control unit can integrate narrowband high-reliability voice and broadband multimedia data on a single platform, taking into account both the stability of the existing network and the future evolution requirements of FRMCS.

[0026] Figure 2 This is a schematic diagram of the framework for dual-mode vehicle-to-ground communication in a rail vehicle communication network system provided in an embodiment of the present invention. Figure 2 As shown, the lead car is equipped with dual-mode LTE and TETRA antennas, which are respectively connected to the corresponding radio system control units. Both the TETRA control unit and the LTE control unit are connected to the passenger information system control unit via audio cables to achieve voice communication interaction. The vehicle control system and the passenger information system can form a backbone network that runs through the entire vehicle through Ethernet switches. The vehicle control system switch 01 and passenger information system switch 1 of the lead car are connected to the vehicle control system switch 02 and passenger information system switch 2 of the middle car, respectively. This not only ensures the redundancy and complementarity of vehicle-to-ground communication under the two modes of LTE and TETRA, but also realizes the reliable transmission of vehicle control data and passenger information data between the lead car and the middle car, thus constructing a complete communication network system that integrates vehicle-to-ground communication, vehicle control and passenger information services.

[0027] Furthermore, in a specific implementation, in the above-mentioned rail vehicle communication network system provided in the embodiments of the present invention, the communication mode selection module can be specifically used to control the TETRA control unit to start and carry the real-time voice service when the vehicle-to-ground transmission service type is identified as a real-time voice service, while controlling the LTE control unit to enter standby mode or turn off; when the vehicle-to-ground transmission service type is identified as a non-real-time data service, the LTE control unit is controlled to start and carry the non-real-time data service, while controlling the TETRA control unit to enter standby mode or turn off.

[0028] In implementation, the communication mode selection module can intelligently switch between the TETRA control unit and the LTE control unit based on the real-time requirements of vehicle-to-ground transmission services. When the service type is identified as real-time voice service, the communication mode selection module controls the TETRA control unit to activate and carry the service, while simultaneously controlling the LTE control unit to enter standby mode or shut down. This leverages the high reliability and low latency of the TETRA network's voice transmission characteristics to ensure the real-time performance and stability of dispatch instructions and emergency calls. When the service type is identified as non-real-time data service, the communication mode selection module controls the LTE control unit to activate and carry the service, while simultaneously controlling the TETRA control unit to enter standby mode or shut down. This leverages the high-speed, high-capacity data transmission capabilities of the LTE network to meet the transmission requirements of large-volume services such as high-definition video backhaul and operational status monitoring. This achieves reasonable allocation and efficient utilization of dual-mode resources, reduces overall system power consumption, avoids electromagnetic interference caused by simultaneous operation of both modules, and provides redundancy backup capability in the event of a single module failure, thereby improving the reliability and adaptability of the vehicle-to-ground communication system.

[0029] It should be noted that the identification criteria for vehicle-to-ground transmission service types may include: protocol identifier in the data packet header, source address port number, service request priority level, and signal quality parameters of the current TETRA network and LTE network.

[0030] The communication mode selection module can also be used to perform fault redundancy control: real-time monitoring of the operating status of the TETRA control unit and the LTE control unit; when the TETRA control unit fails and the current service is a voice service, the control switches to the LTE control unit to carry the voice service; when the LTE control unit fails and the current service is a data service, the control switches to the TETRA control unit to carry the short data service within the data service and interrupts non-urgent long data services. When the load of any channel in the TETRA network or the LTE network exceeds a preset threshold, the communication mode selection module migrates some non-real-time services to another channel for transmission and migrates them back after the load of the original channel is restored. When both the TETRA control unit and the LTE control unit are operating normally, according to a preset load balancing strategy, non-real-time voice services are offloaded to the LTE control unit, or low-priority data services are offloaded to the short data channel of the TETRA control unit.

[0031] Furthermore, in a specific implementation, in the rail vehicle communication network system provided in the embodiments of the present invention, the passenger information system terminal device 23 may include a speaker, a carriage camera, and a passenger emergency intercom device. Specifically, the passenger information system control unit 21 may be used to receive ground audio data decoded by the TETRA control unit and drive the speaker to play it, as well as to collect image data from the carriage camera and forward it to the LTE control unit; real-time voice data collected by the passenger emergency intercom device is transmitted via the TETRA control unit or via the voice channel of the LTE control unit.

[0032] In implementation, the passenger information system control unit 21 serves as the processing node of the passenger information system, undertaking the dual functions of in-vehicle information distribution and vehicle-to-ground data interaction. In the ground audio broadcasting scenario, the passenger information system control unit receives ground audio data decoded by the TETRA control unit and drives the speakers to play it, enabling passengers in the vehicle to receive ground dispatch instructions or emergency notifications in real time. In the in-vehicle data backhaul scenario, the passenger information system control unit collects image data recorded by the in-vehicle cameras and forwards it to the LTE control unit, utilizing the high-speed channel of the LTE network to achieve real-time uploading of monitoring images. For real-time voice data collected by the passenger emergency intercom device, depending on the current network conditions and service priorities, it can flexibly choose to transmit via the TETRA control unit to ensure reliability, or via the voice channel of the LTE control unit to balance bandwidth efficiency, thereby achieving flexible scheduling and redundant backup of voice services between different standards.

[0033] Figure 3 This is a schematic diagram of the transmission channel flow for a ground voice and passenger information system provided in an embodiment of the present invention. Figure 3As shown, the ground control center (or other ground area) transmits the audio picked up by the microphone to the TETRA antenna on the vehicle via the ground rail TETRA network. The TETRA control unit then encodes and decodes the audio before transmitting it to the passenger information control unit. Finally, the audio is played through passenger information system terminal equipment (such as speakers, in-car cameras, and passenger emergency intercom devices), allowing vehicle passengers to hear the audio content from the ground.

[0034] The image data recorded by the car camera is compressed, encoded and / or structured by the passenger information system control unit 21 before transmission. The structured processing may include extracting key frames, overlaying timestamps and car location information.

[0035] Figure 4 This is a schematic diagram of the data flow between the passenger information system and the ground transmission channel provided in an embodiment of the present invention. Figure 4 As shown, data from passenger information system terminal devices (such as audio from passenger emergency intercom devices or image data recorded by in-car cameras) are transmitted to the LTE control unit via the passenger information system switch and passenger information control unit. Then, Ethernet data transmission is achieved through the LTE antenna, the ground rail TETRA network, and related ground hosts, enabling the ground control center to communicate with passengers and acquire onboard monitoring images, thus achieving ground control over the vehicle.

[0036] In practical applications, the passenger information system can achieve data interaction between the vehicle and the ground through the LTE control unit and LTE antenna, including but not limited to image transmission, key vehicle data, radio system faults, passenger intercom and ground communication.

[0037] Furthermore, in a specific implementation, in the above-mentioned rail vehicle communication network system provided in the embodiments of the present invention, when the passenger information system switch 22 is a single switching device, both the first and last LTE control units of the vehicle can be connected to the single switching device; both the first and last LTE control units of the vehicle can exchange data through the single switching device.

[0038] In implementation, when the passenger information system switch 22 is a single switching device, both the front and rear LTE control units of the vehicle are connected to this single switching device and exchange data through it. This method achieves data exchange between the front and rear LTE control units of the vehicle via the passenger information system switch 22, providing system reliability and redundancy, and eliminating the need for traditional radio host interface modules and onboard data train lines.

[0039] Either of the two LTE control units at the front and rear of the vehicle is configured as the primary control unit, and the other is configured as the backup unit. The primary control unit prioritizes vehicle-to-ground data exchange services, while the backup unit synchronizes the link status and cached data of the primary control unit in real time and seamlessly switches to primary control mode in the event of a primary control unit failure. When the LTE control unit at the front or rear of the vehicle fails, the other LTE control unit automatically takes over all vehicle-to-ground data backhaul services through the passenger information system switch, achieving millisecond-level fault switching and ensuring the continuity of vehicle-to-ground communication.

[0040] The data exchange between the two LTE control units at the front and rear of the vehicle may include: radio system status synchronization data, LTE network signal quality monitoring data, vehicle-to-ground communication link switching control commands, and service data transmitted back from the passenger information system and the vehicle control system via the LTE network.

[0041] Furthermore, in a specific implementation, in the above-mentioned rail vehicle communication network system provided in the embodiments of the present invention, when the passenger information system switch 22 includes at least two cascaded or stacked switching devices, a passenger information system switching network is formed; the LTE control units are distributed in different locations of the vehicle and connected to different switching devices; each LTE control unit exchanges data with the other through the passenger information system switching network.

[0042] Figure 5 This is a schematic diagram of a radio data interaction channel provided in an embodiment of the present invention. Figure 5 As shown, when the passenger information system switch includes multiple cascaded or stacked switching devices, a switching network is formed consisting of passenger information system switch 1, passenger information system switch 2 to passenger information system switch n. The LTE control unit at the front of the vehicle is connected to passenger information system switch 1, and the LTE control unit at the rear of the vehicle is connected to passenger information system switch n. Data exchange between the two LTE control units at the front and rear is achieved through this switching network. This supports the expansion networking of multiple switching devices, improves the system's flexibility and scalability, and ensures the stable operation of redundant communication links at the front and rear of the vehicle under different network topologies.

[0043] Furthermore, in a specific implementation, in the rail vehicle communication network system provided in the embodiments of the present invention, the LTE control unit is connected to the passenger information system switch 22 via an Ethernet interface; the passenger information system switch 22 is configured with a Wireless Local Area Network (WLAN) channel partitioning module. The WLAN channel partitioning module can be used to separate communication data into passenger information system communication data and radio system data, and send the passenger information system communication data to the passenger information system control unit 21, which then distributes it to the passenger information system terminal device 23, while sending the radio system data to the LTE control unit.

[0044] In implementation, the aforementioned WLAN channel partitioning module can specifically be used to separate communication data into passenger information system communication data and radio system data. Based on the WLAN channel partitioning method, channel separation is performed, allocating passenger information system communication data and radio system data to different logical channels or physical ports. The separated passenger information system communication data is sent to the passenger information system control unit, which then distributes it to the passenger information system terminal equipment. Radio system data is directly sent to the LTE control unit for vehicle-to-ground data exchange. Through this channel partitioning mechanism, the LTE control unit classifies communication data through the passenger information system switch network, ensuring both the normal distribution of data within the passenger information system and the transmission of radio system data through the corresponding channels. This enables data exchange between the two LTE control units at the front and rear of the vehicle, improving the reliability and redundancy of the radio system.

[0045] Furthermore, in a specific implementation, in the above-mentioned rail vehicle communication network system provided in the embodiments of the present invention, the vehicle control system control unit 31 can be used to collect key vehicle operation data and transmit it to the LTE control unit, and then upload it to the ground control center via the ground rail LTE network; the key vehicle operation data includes black box data and vehicle operation status data.

[0046] Figure 6 This is a schematic diagram of a vehicle control system data transmission channel provided in an embodiment of the present invention. Figure 6 As shown, the vehicle control system control unit 31 can transmit key vehicle operation data, such as black box data and train operation data, to the LTE control unit via the vehicle control system switch 32. This data is then uploaded to the ground control center via the LTE antenna 13 and the ground rail LTE network, enabling data interaction between the vehicle and the ground. This allows the ground control center to obtain vehicle operation data information and achieve ground control over the vehicle. This data interaction is not limited to image transmission but also includes key vehicle data, radio system fault information, passenger intercom, and ground communication functions.

[0047] When the ground control center triggers an emergency broadcast command, the TETRA control unit can prioritize interrupting current non-emergency services and transmit emergency audio data to the passenger information system terminal device 23 through the highest priority channel.

[0048] Furthermore, in a specific implementation, in the above-mentioned rail vehicle communication network system provided in the embodiments of the present invention, the TETRA control unit and the LTE control unit share the same hardware platform; the hardware platform integrates the TETRA baseband processing module, the LTE baseband processing module, the power management module and the antenna interface module; the TETRA antenna 12 and the LTE antenna 13 are independently set or integrated into the same multi-band antenna.

[0049] In implementation, the TETRA control unit and the LTE control unit can share the same hardware platform. This platform integrates the TETRA baseband processing module, the LTE baseband processing module, the power management module, and the antenna interface module, achieving a high degree of integration and unified management of dual-mode functionality. The TETRA antenna and the LTE antenna can be flexibly configured according to the vehicle's electromagnetic compatibility and spatial layout requirements. They can be set up independently to optimize the signal reception performance of each frequency band, or integrated into the same multi-band antenna to simplify installation space, reduce the number of antennas in the vehicle, and reduce wind resistance, thereby balancing communication performance and vehicle lightweight design requirements.

[0050] It should be noted that this invention can achieve efficient and unified management and scheduling of dual-mode networks by integrating functional modules such as user data management, session management, and wireless resource management. This architecture can dynamically allocate network resources according to service priority and real-time requirements, effectively ensuring the quality of service for critical services. Compared to the traditional independent core network architecture, network resource utilization is improved by approximately 15%. Through the rational configuration of the dual-mode system and the implementation of intelligent switching strategies, data transmission rates can be increased to more than 10 times that of the original single TETRA system while ensuring the reliability of voice communication, meeting the diverse communication needs of rail transit.

[0051] In the above embodiments, the rail vehicle communication network system has been described in detail. Based on the same inventive concept, the embodiments of the present invention also provide embodiments corresponding to the rail vehicle communication method.

[0052] This invention also provides the above-described rail vehicle communication method. Figure 7 This is a flowchart illustrating a rail vehicle communication method provided in an embodiment of the present invention. Figure 7 As shown, the communication method for rail vehicles may specifically include the following steps: S701: The ground control center transmits audio data via the ground rail TETRA network to the TETRA control unit in the vehicle's radio system control unit for encoding and decoding, and then distributes it to the passenger information system terminal equipment for playback via the passenger information system control unit.

[0053] In practice, the ground control center can transmit the audio picked up by the microphone to the TETRA antenna on the vehicle via the ground rail TETRA network, then encode and decode it through the radio TETRA control unit, and transmit it to the passenger information control unit. Finally, it can be played through the passenger information system terminal equipment (into the speaker), so that the vehicle passengers can hear the audio content from the ground.

[0054] S702. The business data generated by the passenger information system is aggregated through the passenger information system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the on-board radio system control unit and the ground rail LTE network.

[0055] In practice, audio data from the onboard passenger intercom or image data recorded by the in-car camera are transmitted to the vehicle's LTE radio control unit via the passenger information system switch and passenger information control unit. Through the LTE antenna, Ethernet data transmission is achieved via the ground rail TETRA network and related ground hosts, enabling the ground control center to communicate with passengers and acquire onboard monitoring images, thus achieving ground control over the vehicle.

[0056] In addition, the present invention can divide the wireless local area network channel through the passenger information exchange. The LTE control unit can divide the communication data into passenger information system communication data and radio system data by connecting the passenger information system exchange network. This enables data exchange between the two LTE control units at the front and rear of the vehicle, improving the reliability and redundancy of the radio system.

[0057] S703: The business data generated by the vehicle control system is aggregated through the vehicle control system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the on-board radio system control unit and the ground rail LTE network.

[0058] In practice, key data from the vehicle control unit, such as the black box and vehicle operation data, are transmitted to the vehicle's onboard LTE radio control unit. Ethernet data transmission is achieved through the LTE antenna, the ground-based rail TETRA network, and related ground hosts, enabling the ground control center to obtain vehicle operation data and achieve ground control over the vehicle.

[0059] In the above-described rail vehicle communication method provided in this embodiment of the invention, audio data is transmitted from the ground control center to the TETRA control unit in the vehicle's radio system control unit via the ground rail TETRA network and then to the TETRA control unit in the vehicle's radio system control unit for encoding and decoding. The data is then distributed to the passenger information system terminal equipment for playback via the passenger information system control unit. This fully utilizes the high reliability of the TETRA network in voice communication, ensuring that ground broadcast audio can be stably and in real-time transmitted to passengers inside the vehicle. Business data generated by the passenger information system is aggregated through the passenger information system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the vehicle's radio system control unit and the ground rail LTE network. Leveraging the high speed and large capacity advantages of the LTE network, efficient backhaul of data such as passenger intercom and carriage monitoring images is achieved, improving operational efficiency and passenger experience. Similarly, business data generated by the vehicle control system is aggregated through the vehicle control system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the vehicle's radio system control unit and the ground rail LTE network. This enables real-time uploading of key vehicle operation data, enhancing ground control over the vehicle. This achieves intelligent division of labor between TETRA and LTE dual standards. Voice services rely on the TETRA network to ensure highly reliable transmission, while data services achieve high-speed backhaul through the LTE network. While optimizing network coverage, it effectively improves the overall performance of the vehicle-to-ground communication system, meets the diverse business needs of rail transit, and provides a good foundation for cross-line operation, multi-line coordinated scheduling, and subsequent evolution of communication systems.

[0060] Since the embodiments of the communication method section correspond to the embodiments of the rail vehicle communication network system section, please refer to the description of the embodiments of the rail vehicle communication network system section for the embodiments of the communication method section, and will not be repeated here. Furthermore, it has the same beneficial effects as the rail vehicle communication network system mentioned above.

[0061] For more detailed information on the working process of each of the above steps, please refer to the relevant content disclosed in the foregoing embodiments, which will not be repeated here.

[0062] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, including the aforementioned rail vehicle communication network system. Since the principle by which this electronic device solves the problem is similar to that of the aforementioned rail vehicle communication network system, the implementation of this electronic device can refer to the implementation of the rail vehicle communication network system, and repeated details will not be elaborated further.

[0063] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The foregoing has provided a detailed description of a rail vehicle communication network system and a rail vehicle communication method provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only intended to help understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A railway vehicle communication network system, characterized in that, include: A radio system includes an onboard radio system control unit, a TETRA antenna, and an LTE antenna; the onboard radio system control unit is used for vehicle-to-ground communication via the TETRA antenna and the LTE antenna. The passenger information system includes a passenger information system control unit, a passenger information system switch, and a passenger information system terminal device; the passenger information system control unit is connected to both the passenger information system switch and the vehicle-mounted radio system control unit; the passenger information system terminal device is connected to the passenger information system switch. The vehicle control system includes a vehicle control system control unit and a vehicle control system switch; the vehicle control system control unit is connected to the vehicle control system switch and the vehicle radio system control unit, respectively. The passenger information system control unit and the vehicle control system control unit are both used for vehicle-to-ground data interaction through the vehicle-mounted radio system control unit.

2. The railway vehicle communication network system according to claim 1, characterized in that, The vehicle-mounted radio system control unit includes a TETRA control unit, an LTE control unit, and a communication mode selection module; The TETRA control unit is connected to the TETRA antenna, and the LTE control unit is connected to the LTE antenna; The communication mode selection module is used to identify the vehicle-to-ground transmission service type and control the start / stop switching between the TETRA control unit and the LTE control unit.

3. The railway vehicle communication network system according to claim 2, characterized in that, The communication mode selection module is used to control the TETRA control unit to enable and carry the real-time voice service when the vehicle-to-ground transmission service type is identified as a real-time voice service, and to control the LTE control unit to enter standby mode or turn off when the vehicle-to-ground transmission service type is identified as a non-real-time data service; and to control the LTE control unit to enable and carry the non-real-time data service when the vehicle-to-ground transmission service type is identified as a non-real-time data service, and to control the TETRA control unit to enter standby mode or turn off when the vehicle-to-ground transmission service type is identified as a non-real-time data service.

4. The railway vehicle communication network system of claim 2, wherein, The passenger information system terminal equipment includes a speaker, a car camera, and a passenger emergency intercom device. The passenger information system control unit is used to receive ground audio data decoded by the TETRA control unit and drive the speaker to play it, as well as to collect image data from the carriage camera and forward it to the LTE control unit; the real-time voice data collected by the passenger emergency intercom device is transmitted through the TETRA control unit or through the voice channel of the LTE control unit.

5. The railway vehicle communication network system of claim 2, wherein, When the passenger information system switch is a single switching device, both the first and last LTE control units of the vehicle are connected to the single switching device. Both of the LTE control units at the front and rear of the vehicle exchange data through the single switching device.

6. The railway vehicle communication network system of claim 2, wherein, When the passenger information system switch includes at least two cascaded or stacked switching devices, a passenger information system switching network is formed; The LTE control units are distributed in different locations within the vehicle and connected to different switching devices; Each of the LTE control units exchanges data with the passenger information system exchange network.

7. The rail vehicle communication network system according to claim 2, characterized in that, The LTE control unit is connected to the passenger information system switch via an Ethernet interface; The passenger information system switch is equipped with a wireless local area network (WLAN) channel partitioning module. The WLAN channel partitioning module is used to separate communication data into passenger information system communication data and radio system data, and send the passenger information system communication data to the passenger information system control unit, which then distributes it to the passenger information system terminal equipment. The radio system data is sent to the LTE control unit.

8. The rail vehicle communication network system according to claim 2, characterized in that, The vehicle control system control unit is used to collect key vehicle operation data and transmit it to the LTE control unit, which then uploads it to the ground control center via the ground rail LTE network. The key vehicle operation data includes black box data and vehicle operation status data.

9. The rail vehicle communication network system according to claim 2, characterized in that, The TETRA control unit and the LTE control unit share the same hardware platform; The hardware platform integrates a TETRA baseband processing module, an LTE baseband processing module, a power management module, and an antenna interface module. The TETRA antenna and the LTE antenna are either independently configured or integrated into the same multi-band antenna.

10. A communication method for rail vehicles, characterized in that, Applied to the rail vehicle communication network system as described in any one of claims 1 to 9, comprising: The ground control center transmits audio data via the ground rail TETRA network to the TETRA control unit in the vehicle radio system control unit for encoding and decoding, and then distributes it to the passenger information system terminal equipment for playback via the passenger information system control unit. The business data generated by the passenger information system is aggregated through the passenger information system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the on-board radio system control unit through the ground rail LTE network. The business data generated by the vehicle control system is aggregated through the vehicle control system switch and then transmitted to the ground control center via the LTE control unit and LTE antenna in the on-board radio system control unit through the ground rail LTE network.

Images