System and method for PTC train control system to run compatibly with ETCS2 train control system

Abstract

This invention discloses a system and method for compatible operation of a PTC train control system and an ETCS2 ​​train control system. The system includes: a PTC trackside control device deployed in the shared track area between the PTC line and the ETCS2 ​​line; interlocking equipment in the ETCS2 ​​line, which establishes an interface connection with the PTC trackside control device to send trackside resources within the shared track area to the PTC trackside control device; and the PTC trackside control device, which further sends control commands to PTC trains operating within the shared track area based on the trackside route information to ensure their safe operation within the shared track area. This invention sets up a PTC trackside control device in the shared track area of ​​the ETCS line and establishes an interface connection with the interlocking equipment in the ETCS2 ​​line, meeting the requirements for PTC line shared track operation.

Description

Technical Field

[0001] This invention relates to the field of railway train control system technology, and in particular to a system and method for compatible operation of PTC train control system and ETCS2 ​​train control system. Background Technology

[0002] With the development of railways overseas, more and more regions are undertaking railway construction and upgrades. In terms of train control systems, the ETCS (European Train Control System) is widely used globally due to its excellent interoperability. However, this has also led to compatibility issues between existing line control systems and newly built ETCS systems. In North America, this issue mainly focuses on the compatibility between the PTC (Positive Train Control) system and the European Train Control System Level 2 (ETCS2). In North America, existing lines and trains extensively use the PTC system, making it impossible to quickly convert to ETCS. Some PTC lines, in turn, require the use of newly constructed ETCS2 ​​lines for operation.

[0003] The existing methods for compatible operation of the two control systems mostly involve installing two sets of onboard equipment on the train and setting a switching point at the intersection of the two train control systems on the trackside. This solution is a good solution for trains that need to operate on two opposing lines for a long time. However, for trains that operate on the PTC line most of the time and only use a short section of the ETCS2 ​​line in between, the solution of adding ETCS2 ​​onboard equipment to all trains would require a huge investment in terms of cost and engineering.

[0004] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a system and method for the PTC train control system to operate compatiblely with the ETCS2 ​​train control system. PTC trackside control equipment is installed in the bypass area on the ETCS line, and an interface connection is established with the interlocking equipment on the ETCS2 ​​line to meet the requirements of PTC line bypass operation.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A system compatible with both PTC and ETCS2 ​​train control systems includes: PTC trackside control equipment deployed in the shared area between the PTC and ETCS2 ​​lines; The interlocking equipment in the ETCS2 ​​line establishes an interface connection with the PTC trackside control equipment to send trackside resources in the borrowed area to the PTC trackside control equipment. The PTC trackside control equipment is also used to send control commands to PTC trains operating in the borrowed area based on the trackside resources, so as to control their safe operation in the borrowed area.

[0007] Optionally, the PTC trackside control device and the interlocking device are connected via a safety communication protocol that conforms to international standards.

[0008] Optionally, the communication between the PTC trackside control device and the interlocking device adopts data encryption and redundant communication mechanisms to ensure the stability of the interface and the security of data transmission.

[0009] Optionally, the trackside resources include trackside route information, section occupancy status, turnout location, and signal status.

[0010] Optionally, the system also includes ETCS2 ​​trackside control equipment, deployed in the shared area between the PTC line and the ETCS2 ​​line, and establishes an interface connection with the interlocking equipment.

[0011] Optionally, the system is configured to support a first compatibility mode, in which direct communication is not established between the PTC trackside control device and the ETCS2 ​​trackside control device; the PTC trackside control device treats the ETCS2 ​​train as a non-communication train and generates a movement authorization for the PTC train based on the section occupancy status information obtained from the interlocking device to ensure that it does not enter the section occupied by the ETCS2 ​​train; the ETCS2 ​​trackside control device treats the PTC train as a non-communication train and generates a movement authorization for the ETCS2 ​​train based on the section occupancy status information obtained from the interlocking device to ensure that it does not enter the section occupied by the PTC train.

[0012] Optionally, the system is configured to support a second compatibility mode, in which a bidirectional data communication connection is established between the PTC trackside control device and the ETCS2 ​​trackside control device; the PTC trackside control device sends the PTC train operation information obtained through vehicle-to-ground communication to the ETCS2 ​​trackside control device; the ETCS2 ​​trackside control device sends the operation information of the ETCS2 ​​trains under its jurisdiction to the PTC trackside control device; based on the train information received from the other system, each trackside control device generates a movement authorization for the trains it controls.

[0013] Optionally, the PTC trackside control equipment is also used to send PTC train operation information and ETCS2 ​​train operation information to the PTC dispatch center equipment; The ETCS2 ​​trackside control equipment is also used to send ETCS2 ​​train operation information and PTC train operation information to the ETCS2 ​​dispatch center equipment.

[0014] A method for compatible operation of a PTC train control system and an ETCS2 ​​train control system, applied to a PTC trackside control device in a system as described above for compatible operation of a PTC train control system and an ETCS2 ​​train control system, the method comprising: Obtain trackside resources within the borrowed area from the interlocking equipment; Based on the trackside resources, a control command is sent to the PTC train operating within the shared track area to control its safe operation within the shared track area.

[0015] Optionally, the system further includes an ETCS2 ​​trackside control device, the system being configured to support a first compatibility mode in which no direct communication is established with the ETCS2 ​​trackside control device; the method further includes: The ETCS2 ​​train is treated as a non-communication train, and a movement authorization is generated for the PTC train based on the section occupancy status information obtained from the interlocking equipment to ensure that it does not enter the section occupied by the ETCS2 ​​train; the ETCS2 ​​trackside control equipment treats the PTC train as a non-communication train, and a movement authorization is generated for the ETCS2 ​​train based on the section occupancy status information obtained from the interlocking equipment to ensure that it does not enter the section occupied by the PTC train.

[0016] Optionally, the system further includes an ETCS2 ​​trackside control device, the system being configured to support a second compatibility mode, in which a bidirectional data communication connection is established between the PTC trackside control device and the ETCS2 ​​trackside control device; the method further includes: The PTC train operation information obtained through vehicle-to-ground communication is sent to the ETCS2 ​​trackside control equipment so that the ETCS2 ​​trackside control equipment can generate a movement authorization for the ETCS2 ​​train based on the received PTC train operation information. The system receives ETCS2 ​​train operation information sent by the ETCS2 ​​trackside control device and generates movement authorization for the PTC train based on the received ETCS2 ​​train operation information.

[0017] Optionally, the method further includes: Send PTC train operation information and ETCS2 ​​train operation information to the PTC dispatch center equipment.

[0018] Compared with the prior art, the present invention has at least the following technical effects: The resource-sharing model of zero-modification of onboard train control equipment and standardized trackside interface: It breaks through the limitation of the traditional cross-system compatibility that requires simultaneous modification of onboard and trackside control equipment. It establishes a standardized interface only through the trackside control equipment, so that the PTC system can seamlessly borrow the ETCS2 ​​line resources. The PTC onboard equipment keeps its original functional configuration unchanged, which greatly reduces the complexity of modification.

[0019] Unified Adaptation Logic for Non-Communication Trains: Innovatively, trains from the other system are included in the management scope of non-communication trains. Through the safety rules preset by the PTC and ETCS2 ​​systems and the existing occupancy detection equipment, train isolation and protection are achieved when there is no direct communication, without the need to modify the existing software and hardware of either system.

[0020] Two-way real-time data sharing and collaboration mechanism: Establish a two-way data interaction channel between PTC and ETCS2 ​​trackside control equipment to dynamically synchronize train position, speed, operation plan and section occupancy status, and realize cross-system management upgrade from passive isolation to active collaboration.

[0021] No modifications are required to the PTC vehicle-mounted equipment and ETCS2 ​​system hardware and software, avoiding the high costs associated with large-scale equipment upgrades and debugging, and shortening the project implementation cycle.

[0022] Reuse existing occupancy detection equipment and security management logic to reduce investment in new equipment and lower long-term operation and maintenance complexity.

[0023] It supports both communication-enabled and communication-free compatibility modes, allowing for flexible selection of adaptation schemes based on the communication conditions and operational needs of railway lines, thereby enhancing the system's adaptability to different operational scenarios. Attached Figure Description

[0024] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort: Figure 1 This is a schematic diagram of the structure of a system that is compatible with both the PTC train control system and the ETCS2 ​​train control system, according to an embodiment of the present invention. Figure 2 This is a processing logic diagram for the PTC trackside control device and the ETCS2 ​​trackside control device in the absence of communication. Figure 3 This is a processing logic diagram for the PTC and ETCS2 ​​trackside control devices when they communicate with each other. Detailed Implementation

[0025] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the solution proposed by the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the embodiments of the present invention. Please refer to the drawings to make the objectives, features, and advantages of the present invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the present invention, should still fall within the scope of the technical content disclosed in the present invention.

[0026] For scenarios in North America where existing PTC lines temporarily utilize sections of the newly built ETCS2 ​​line, this invention proposes a PTC-ETCS2 ​​system compatible operation scheme based on dual-system trackside equipment, information interaction, and safety logic adaptation. This scheme deploys PTC trackside control equipment in the shared area and establishes a standardized safety interface with the existing interlocking equipment of the ETCS2 ​​line, enabling the sharing of ETCS2 ​​trackside resources (such as routes, section occupancy, turnouts, and signal status) with the PTC system. The PTC trackside control equipment utilizes these shared resources to generate and issue control commands to PTC trains operating within its jurisdiction. This scheme simultaneously supports two compatible operation strategies: "no communication isolation mode" and "communication cooperative mode," allowing for flexible selection based on on-site communication conditions and technical requirements. This invention enables safe cross-system mixed operation with zero modification to onboard equipment and low-cost adaptation of the trackside system.

[0027] refer to Figure 1 The basic architecture of a system compatible with both the PTC train control system and the ETCS2 ​​train control system in this embodiment includes: a PTC trackside control device deployed in the shared area between the PTC line and the ETCS2 ​​line; interlocking equipment in the ETCS2 ​​line, which establishes an interface connection with the PTC trackside control device to send trackside resources in the shared area to the PTC trackside control device; and the PTC trackside control device, which is also used to send control commands to PTC trains operating in the shared area based on the trackside resources, so as to control their safe operation in the shared area.

[0028] Within the section of ETCS2 ​​line that the PTC line needs to temporarily borrow (i.e., the borrowed area), in addition to the existing ETCS2 ​​system equipment, this invention adds a separate PTC trackside control device. The PTC onboard equipment does not require any modification; it can maintain its original functions and configuration.

[0029] The task of the PTC trackside control equipment is to provide control services for PTC trains entering the shared track area. To achieve this, it must obtain the real-time track status of the shared track area. Therefore, this invention establishes a standardized interface connection between the PTC trackside control equipment and the interlocking equipment inherent in the ETCS2 ​​line, thereby realizing the sharing of trackside resources on the ETCS2 ​​line. Through this interface, the interlocking equipment periodically or on demand sends the real-time trackside resource information it collects and processes to the PTC trackside control equipment. Trackside resources include trackside route information, section occupancy status, turnout positions, and signal status. After obtaining this information, the PTC trackside control equipment can understand the track topology and real-time occupancy status of the shared track area, just as it would on the native PTC line. Based on the position, speed, and other information reported by the PTC trains through vehicle-to-ground communication, combined with the received trackside resource information, it generates corresponding train control commands (such as train permission, temporary speed limit, speed curve, etc.) according to the control logic of the PTC system, and sends them to the PTC trains operating in the shared track area through the PTC vehicle-to-ground communication network, thereby controlling their safe operation. This approach not only enables resource sharing but also effectively meets the needs of PTC lines to operate via shared tracks, providing greater flexibility and efficiency for railway operations.

[0030] To ensure the stability and security of interface communication, the PTC trackside control equipment and interlocking equipment adopt a communication protocol that conforms to international standards, and use encryption algorithms to protect transmitted data, preventing information from being tampered with or leaked during transmission. Simultaneously, dual-channel redundancy and other communication mechanisms are employed, enabling rapid switching to a backup communication channel in the event of interface connection anomalies or data transmission interruptions. This ensures continuous access to critical information and prevents PTC vehicle operation from being affected by single-point failures.

[0031] like Figure 1 As shown, within the shared track area, ETCS2 ​​trackside control equipment is also deployed, establishing an interface connection with the interlocking equipment. The interlocking equipment sends the real-time trackside resource information it collects and processes to the ETCS2 ​​trackside control equipment. Based on the position, speed, and other information reported by the ETCS2 ​​trains via vehicle-to-ground communication, and combined with the received trackside resource information, the ETCS2 ​​trackside control equipment generates corresponding train control commands (such as train operation permits, temporary speed limits, speed curves, etc.) according to the control logic of the ETCS2 ​​system, and sends them to the ETCS2 ​​trains operating within the shared track area through the ETCS2 ​​vehicle-to-ground communication network, thereby controlling their safe operation.

[0032] The ETCS2 ​​trackside control equipment and the PTC trackside control equipment within the shared area may or may not communicate.

[0033] like Figure 2 As shown, this embodiment describes a compatible operation mode, or "first compatibility mode," when there is no direct communication between the PTC trackside control equipment and the ETCS2 ​​trackside control equipment. In this mode, no dedicated data communication link is established between the PTC trackside control equipment and the ETCS2 ​​trackside control equipment. The perception of each other's trains by both systems relies entirely on the section occupancy status information obtained from the shared interlocking equipment.

[0034] The PTC trackside control equipment treats the ETCS2 ​​train as a non-communication train and generates movement authorizations for PTC trains based on the section occupancy status information obtained from the interlocking equipment to ensure that they do not enter sections occupied by the ETCS2 ​​train. When an ETCS2 ​​train enters and occupies a section of the shared track area, occupancy detection equipment (such as track circuits, axle counters, etc.) reports that the section has become occupied to the interlocking equipment. The PTC trackside control equipment obtains this status change through an interface. In the safety logic of the PTC system, trains that cannot be directly identified through vehicle-to-ground communication (i.e., non-PTC trains) are uniformly classified as "non-communication trains." Therefore, the PTC trackside control equipment considers this occupied section to be occupied by a "non-communication train." When calculating movement authorizations for subsequent PTC trains, the system uses the boundary of this occupied section as the endpoint or danger point of the movement authorization, limiting the speed and operating range of subsequent PTC trains, thereby ensuring that PTC trains do not enter sections already occupied by the ETCS2 ​​train, achieving spatial isolation.

[0035] Similarly, the ETCS2 ​​trackside control equipment also treats PTC trains as non-communication trains and generates movement authorizations for ETCS2 ​​trains based on the section occupancy status information obtained from the interlocking equipment to ensure they do not enter sections occupied by PTC trains. When a PTC train enters a shared lane area and occupies a section, the occupancy detection equipment also reports the occupancy to the interlocking equipment. The ETCS2 ​​trackside control equipment obtains this occupancy information from the interlocking equipment. In the logic of the ETCS2 ​​system, trains that cannot be identified through ETCS2 ​​wireless communication are also considered "non-communication trains." When calculating movement permits for ETCS2 ​​trains, the ETCS2 ​​trackside control equipment treats sections occupied by PTC trains as obstacles to ensure that ETCS2 ​​trains do not enter sections occupied by PTC trains. No modifications are required to the ETCS2 ​​trackside control equipment.

[0036] like Figure 2As shown, the PTC trackside control equipment also sends PTC train operation information to the PTC dispatch center equipment, and reports that the section where the ETCS2 ​​train is located is occupied by a non-communication train. The ETCS2 ​​trackside control equipment also sends ETCS2 ​​train operation information to the ETCS2 ​​dispatch center equipment, and reports that the section where the PTC train is located is occupied by a non-communication train.

[0037] The first compatibility mode avoids hardware and software modifications to existing ETCS2 ​​level trackside control equipment, reducing system upgrade costs, and ensures safety and reliability during cross-system operation through standardized non-communication train handling procedures, further expanding the application scenarios for compatible operation of different train control systems.

[0038] like Figure 3 As shown, this embodiment describes a higher-order compatible operation mode, namely the "second compatibility mode," when the PTC trackside control equipment and the ETCS2 ​​trackside control equipment have communication capabilities. In this mode, a bidirectional data communication connection is established between the PTC trackside control equipment and the ETCS2 ​​trackside control equipment. Through this channel, the two sides exchange richer train dynamic information than simply section occupancy.

[0039] Specifically, a bidirectional data communication connection is established between the PTC trackside control device and the ETCS2 ​​trackside control device; the PTC trackside control device sends the PTC train operation information obtained through vehicle-to-ground communication to the ETCS2 ​​trackside control device; the ETCS2 ​​trackside control device sends the operation information of the ETCS2 ​​trains under its jurisdiction to the PTC trackside control device; based on the train information received from the other system, each trackside control device generates a movement authorization for the trains under its control.

[0040] The PTC trackside control equipment continuously receives operational information (such as train ID, precise real-time location, speed, direction of travel, and length) from PTC trains under its jurisdiction via its vehicle-to-ground communication network. This information is then processed and transmitted to the ETCS2 ​​trackside control equipment via a two-way communication link. Similarly, the ETCS2 ​​trackside control equipment also sends detailed operational information of its managed ETCS2 ​​trains to the PTC trackside control equipment. Upon receiving precise information from ETCS2 ​​trains, the PTC trackside control equipment no longer treats them simply as a "black box" occupying the entire section, but rather knows their precise location, length, and speed. This allows the PTC system to generate more refined and efficient movement authorizations for PTC trains, shortening train intervals and improving throughput in shared areas while ensuring safety. Likewise, after obtaining precise information from PTC trains, the ETCS2 ​​trackside control equipment can also generate more optimized movement permits for the ETCS2 ​​trains it controls.

[0041] like Figure 3As shown, the PTC trackside control equipment is also used to send PTC train operation information and ETCS2 ​​train operation information to the PTC dispatch center equipment. The ETCS2 ​​trackside control equipment is also used to send ETCS2 ​​train operation information and PTC train operation information to the ETCS2 ​​dispatch center equipment.

[0042] In the second compatibility mode, both systems can dynamically monitor the position, speed, and operation plan of each other's trains through real-time data interaction. This allows for precise path planning and safety protection of these external trains within their respective control logics. This two-way data sharing mechanism enables the PTC train control system and the ETCS2 ​​train control system to work collaboratively as a unified whole, implementing unified safety management of mixed-operation trains when communication is available. This avoids the risk of train conflicts caused by information asymmetry and further improves the operational coordination between trains across systems and the overall utilization efficiency of the line.

[0043] Although this mode requires the addition of communication interfaces between trackside control equipment, it can significantly improve the track utilization efficiency and operational flexibility when running in mixed traffic, and is suitable for scenarios with long lane borrowing areas and high traffic density.

[0044] Based on the same inventive concept, this invention also provides a method for the compatible operation of a PTC train control system and an ETCS2 ​​train control system, applied to the aforementioned PTC trackside control equipment deployed in the shared track area. The method includes: obtaining trackside resources within the shared track area from the interlocking equipment; and sending a train control command to a PTC train operating within the shared track area based on the trackside resources, to control its safe operation within the shared track area.

[0045] Specifically, the PTC trackside control equipment continuously acquires real-time trackside resource information of the shared area from the interlocking equipment of the ETCS2 ​​line through a standard safety interface. Based on the acquired trackside resource information, combined with the train status received by the system through PTC vehicle-to-ground communication, it generates control commands (such as movement authorization) conforming to PTC specifications for each PTC train and issues them to the train.

[0046] When the system is configured in the first compatibility mode, the method further includes: treating the ETCS2 ​​train as a non-communication train and generating a movement authorization for the PTC train based on the section occupancy status information obtained from the interlocking equipment to ensure that it does not enter the section occupied by the ETCS2 ​​train; the ETCS2 ​​trackside control equipment treats the PTC train as a non-communication train and generates a movement authorization for the ETCS2 ​​train based on the section occupancy status information obtained from the interlocking equipment to ensure that it does not enter the section occupied by the PTC train.

[0047] In other words, the PTC trackside control equipment will identify occupancy caused by non-PTC trains (i.e., ETCS2 ​​trains) from the section occupancy information obtained from the interlocking equipment, and restrict the movement authorization of PTC trains accordingly. Similarly, the ETCS2 ​​trackside control equipment will identify occupancy caused by non-ETCS2 ​​trains (i.e., PTC trains) from the section occupancy information obtained from the interlocking equipment, and restrict the movement authorization of ETCS2 ​​trains accordingly.

[0048] In addition, combined Figure 2 As shown, the PTC trackside control equipment also sends PTC train operation information to the PTC dispatch center equipment, and reports that the section where the ETCS2 ​​train is located is occupied by a non-communication train. The ETCS2 ​​trackside control equipment also sends ETCS2 ​​train operation information to the ETCS2 ​​dispatch center equipment, and reports that the section where the PTC train is located is occupied by a non-communication train.

[0049] When the system is configured in the second compatibility mode, the method further includes: sending the PTC train operation information obtained through vehicle-to-ground communication to the ETCS2 ​​trackside control device, so that the ETCS2 ​​trackside control device generates a movement authorization for the ETCS2 ​​train based on the received PTC train operation information; receiving the ETCS2 ​​train operation information sent by the ETCS2 ​​trackside control device, and generating a movement authorization for the PTC train based on the received ETCS2 ​​train operation information.

[0050] In other words, the PTC trackside control equipment needs to package and send PTC train operation information to the ETCS2 ​​trackside control equipment, while simultaneously receiving and parsing ETCS2 ​​train operation information from the ETCS2 ​​trackside control equipment. When generating movement authorization for its own trains, it comprehensively utilizes trackside resource information and accurate information about the other train.

[0051] In addition, combined Figure 3 As shown, the PTC trackside control equipment also sends PTC train operation information and ETCS2 ​​train operation information to the PTC dispatch center equipment. The ETCS2 ​​trackside control equipment also sends ETCS2 ​​train operation information and PTC train operation information to the ETCS2 ​​dispatch center equipment.

[0052] In summary, this invention enables PTC trains to utilize ETCS2 ​​line resources without requiring any software or hardware modifications to the PTC and ETCS2 ​​onboard equipment, significantly reducing the implementation cost and time required for cross-system compatibility. By reusing existing interlocking equipment's occupancy detection information and safety processing logic, or by establishing bidirectional communication between trackside control equipment to achieve information synchronization, it effectively ensures safe intervals and operational efficiency for trains of different systems operating in mixed environments.

[0053] It should be noted that, in this document, 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. Unless otherwise specified, 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.

[0054] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A system for PTC train control system to be compatible with ETCS2 train control system, characterized in that, The system comprises: a PTC wayside control device deployed in a borrowed area of a PTC line and an ETCS2 line; an interlocking device in the ETCS2 line, which is connected to the PTC wayside control device and is configured to send trackside resources in the borrowed area to the PTC wayside control device; the PTC wayside control device is further configured to send a train control command to a PTC train running in the borrowed area according to the trackside resources, so as to control the safe running of the PTC train in the borrowed area.

2. The system for PTC train control system to operate compatibly with ETCS2 train control system according to claim 1, characterized in that, The PTC wayside control device and the interlocking device are connected through a safety communication protocol conforming to an international standard.

3. The system for PTC train control system compatible operation with ETCS2 train control system according to claim 2, characterized in that, The communication between the PTC wayside control device and the interlocking device adopts a data encryption and redundant communication mechanism, so as to ensure the stability of the interface and the safety of data transmission.

4. The system for PTC train control system compatible operation with ETCS2 train control system according to claim 1, characterized in that, The trackside resources include trackside route information, section occupancy status, switch position and signal status.

5. The system for PTC train control system compatible operation with ETCS2 train control system according to claim 1, characterized in that, The system further comprises an ETCS2 wayside control device deployed in the borrowed area of the PTC line and the ETCS2 line, which is connected to the interlocking device.

6. The system for PTC train control system compatible operation with ETCS2 train control system according to claim 5, characterized in that, The system is configured to support a first compatible mode, in which the PTC wayside control device and the ETCS2 wayside control device do not establish direct communication, the PTC wayside control device regards an ETCS2 train as a non-communication train, and generates a movement authority for a PTC train based on section occupancy status information obtained from the interlocking device, so as to ensure that the PTC train does not enter a section occupied by the ETCS2 train; the ETCS2 wayside control device regards a PTC train as a non-communication train, and generates a movement authority for an ETCS2 train based on section occupancy status information obtained from the interlocking device, so as to ensure that the ETCS2 train does not enter a section occupied by the PTC train.

7. The system of claim 5, wherein the PTC control system is compatible with the ETCS2 train control system, and The system is configured to support a second compatible mode, in which the PTC wayside control device and the ETCS2 wayside control device establish a bidirectional data communication connection, the PTC wayside control device sends PTC train running information obtained through train-ground communication to the ETCS2 wayside control device, the ETCS2 wayside control device sends running information of an ETCS2 train under its jurisdiction to the PTC wayside control device, and the two wayside control devices generate movement authorities for the trains under their control based on the received train information of the other system.

8. The system for PTC train control system compatible operation with ETCS2 train control system according to claim 7, characterized in that, The PTC wayside control device is further configured to send PTC train running information and ETCS2 train running information to a PTC dispatch center device; The ETCS2 wayside control device is further configured to send ETCS2 train running information and PTC train running information to an ETCS2 dispatch center device.

9. A method for compatible operation of a PTC train control system with an ETCS2 train control system, applied to a PTC trackside control device in a system for compatible operation of a PTC train control system with an ETCS2 train control system according to any one of claims 1 to 8, characterized in that, The method comprises: obtaining trackside resources in a borrowed area from the interlocking device; sending a train control command to a PTC train running in the borrowed area according to the trackside resources, so as to control the safe running of the PTC train in the borrowed area.

10. The method for PTC train control system to operate compatibly with ETCS2 train control system according to claim 9, characterized in that, The system further comprises an ETCS2 trackside control device, and the system is configured to support a first compatible mode in which no direct communication is established between the PTC trackside control device and the ETCS2 trackside control device; The method further comprises: regarding the ETCS2 train as a non-communication train and generating a movement authority for the PTC train based on the section occupancy status information obtained from the interlocking device to ensure that the PTC train does not enter a section occupied by the ETCS2 train; and regarding the PTC train as a non-communication train and generating a movement authority for the ETCS2 train based on the section occupancy status information obtained from the interlocking device to ensure that the ETCS2 train does not enter a section occupied by the PTC train.

11. The method for PTC train control system to operate compatibly with ETCS2 train control system according to claim 9, characterized in that, The system further comprises an ETCS2 trackside control device, and the system is configured to support a second compatible mode in which a bidirectional data communication connection is established between the PTC trackside control device and the ETCS2 trackside control device; and the method further comprises: sending the PTC train operation information obtained through the train-ground communication to the ETCS2 trackside control device to enable the ETCS2 trackside control device to generate a movement authority for the ETCS2 train based on the received PTC train operation information; receiving the ETCS2 train operation information sent by the ETCS2 trackside control device and generating a movement authority for the PTC train based on the received ETCS2 train operation information.

12. The method for the PTC train control system to operate compatibly with the ETCS2 train control system according to claim 11, characterized in that, The method further comprises: sending the PTC train operation information and the ETCS2 train operation information to the PTC dispatching center device.

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