Method and system for maintaining state of external interface system during shutdown of high-speed rail CTC skylight

Abstract

The invention discloses a method and a system for maintaining the state of an external interface system during the shutdown period of a high-speed rail CTC (Computer Television Control) skylight, which are corresponding schemes: a CTC external support information subsystem with a two-stage structure is designed; the two-level structure comprises an external support information center module and an external support information station module which are configured in a CTC center system and a CTC station system, synchronous recording of information of an external interface system is achieved through a CTC external support information subsystem, the closed CTC subsystem can be replaced when a high-speed rail CTC skylight is stopped, external support information can be continuously provided, and the service life of the high-speed rail CTC skylight is prolonged. And the method has practical significance for accurately recovering the whole service and compressing the influence duration of the skylight when the skylight is finished.

Description

Technical Field

[0001] The present invention relates to the technical field of railway transportation, and particularly to a method and system for maintaining the state of an external interface system during the outage of the high-speed rail CTC skylight. Background Art

[0002] The high-speed rail skylight is a time-space window period for technical operations such as equipment inspection, line maintenance, fault handling, and system upgrade. The operation within the skylight range is interrupted according to the plan. The Centralized Traffic Control (CTC) system is a system equipment for centralized dispatching of high-speed rail train operation resources. During the skylight period, the corresponding CTC subsystem software is closed to deactivate the corresponding dispatching service, so as to avoid the time-space conflict between operation and technical operations. With the improvement of the information integration degree of the high-speed rail CTC system, the number of external interface systems of the CTC system increases, including the Temporary Speed Restriction Server (TSRS), Radio Block Center (RBC), Transportation Dispatching Management System (TDMS), Global System for Mobile Communications - Railway (GSM-R), interlocking, and train control. There is a tight state coupling relationship between the external interface system and the CTC. The shutdown of the CTC subsystem often leads to the loss of the state of the external interface system. For example, Figure 1 Each module or device of the CTC central system and the CTC station system in [reference] can be individually shut down as a CTC subsystem. When the skylight ends and the closed CTC subsystem is enabled, the state of the external interface system cannot be automatically restored to the state before the skylight.

[0003] The impacts of the CTC subsystem deactivation on the external interface system status include three categories: primary / backup status, clock synchronization, and service execution status. (1) The impact on the primary / backup status means that the external interface system is a dual-machine system, and its primary / backup machine status is comprehensively determined and arbitrated by the CTC system. When the corresponding CTC subsystem is in the closed state, the primary / backup status of the external dual-machine system that depends on the CTC system arbitration changes, resulting in non-optimal devices preempting the host authority; among them, the dual-machine system means that only one device executes relevant services at the same time, and the other standby machine is in the service backup state. (2) The impact on the clock synchronization status means that the deactivation of the CTC subsystem causes the loss of the CTC system's external time-giving function, and the corresponding external interface system has a clock deviation. (3) The impact on the service execution status means that signal control statuses such as speed limit, locking state, and poor shunting, which are sent by the CTC system to the external interface system as periodic control instructions and executed by the external interface system, will cause the external interface system to lose the execution status when the CTC-related subsystem is closed because it cannot continuously receive periodic instructions to maintain information.

[0004] Due to different information requirements of the external interface system for the CTC system, the impacts of the CTC subsystem deactivation are also different. During the skylight period, the TSRS system needs to receive the speed limit command status maintenance information and clock information sent by the CTC system. The lack of speed limit command status maintenance information will cause the speed limit status during the execution of the TSRS to disappear, and the lack of clock information will cause the clock deviation within the TSRS system. During the skylight period, the RBC needs to receive the clock information sent by the CTC system. The lack of clock information will cause the RBC clock deviation. TDMS receives the actual train operation diagram regularly sent by the CTC system. If the CTC system stops sending the actual train operation diagram during the skylight period, it will cause periodic alarms in the TDMS system and affect its service execution status. During the skylight period, the GSM-R system needs to receive the locomotive registration application information sent by the CTC system. The lack of this information will cause the registration status of the registered locomotives to disappear, and then trigger an alarm in the GSM-R system, affecting its service execution status. During the skylight period, both the interlocking and train control systems need to receive the primary / backup arbitration information and clock information sent by the CTC system. The lack of primary / backup arbitration information will cause the primary / backup status of the interlocking and train control systems themselves to deviate from the optimal state, and the lack of clock information will cause the clock deviation within the interlocking and train control systems.

[0005] In view of the above situation, the current solutions are as follows: According to the status of the external interface system in front of the skylight, manually check the status of the external interface system affected during the skylight and perform restoration settings. Specifically: The signal maintenance personnel record the primary and standby status of the external interface system before the skylight and perform status confirmation and restoration settings at the end of the skylight; The dispatcher and the station duty officer register the execution status of the relevant services of the external interface system before the skylight and perform status confirmation and restoration settings at the end of the skylight; The clock status of the external interface system during the skylight is monitored by the signal maintenance personnel and corrected in a timely manner, and it returns to the automatic synchronization mode after the CTC subsystem is started; Some subsystems of CTC are set up with a dual-machine system. The main machine synchronizes the information recorded by itself to the standby machine. The standby machine automatically takes over the corresponding services when the main machine shuts down and provides information support externally.

[0006] However, the defects of the above solutions are as follows: Manually registering, confirming, and setting the status of the external interface system do not make full use of the available CTC channel resources and equipment resources during the skylight, with low automation, high labor intensity, and high safety pressure for relevant personnel; Due to the large number and types of the high-speed rail CTC external interface systems, the existing manual methods do not have "technical prevention" or "physical prevention" measures for control, and there are risks of omission and misoperation; Before the end of the skylight, time needs to be reserved for manually confirming and setting the status of the external interface system, which prolongs the duration of the skylight and is not conducive to the timely release of transport capacity and the rapid restoration of operation organization; The CTC dual-machine system needs to be shut down simultaneously during some construction operations to deactivate the corresponding services and ensure the safety of construction operations within the skylight period. The external interface system status cannot be effectively maintained during the period when the dual machines are deactivated.

[0007] Excluding the above manual solutions and the dual-machine synchronization solutions applicable only in some scenarios, the existing automation solutions are mainly used for the optimization of railway skylights or the control of information during railway skylights, but none of them can maintain the status of the external interface system. For example, the Chinese invention patent application "A Method, Device, Equipment, and Readable Storage Medium for Optimizing Railway Skylight Schemes" with the publication number CN119250394A, and the Chinese invention patent application "A Method and System for Deactivating the Inner Dispatcher Service during the High-Speed Rail Skylight Based on CTC" with the publication number CN119840690A.

[0008] In view of this, the present invention is specifically proposed. Summary of the Invention

[0009] The purpose of the present invention is to provide a method and system for maintaining the status of the external interface system during the deactivation of the high-speed rail CTC skylight, which can replace the closed CTC subsystem during the skylight and continuously provide external support information, reduce labor intensity, and ensure train operation safety.

[0010] The purpose of the present invention is achieved through the following technical solutions: An external interface system status maintenance system during the shutdown period of the high-speed rail CTC skylight, comprising: a CTC external support information subsystem provided in the CTC system for maintaining the status of the external interface system during the shutdown period of the high-speed rail CTC skylight. Among them, the CTC system is a centralized traffic control system, including: a CTC central system and a CTC station system; The CTC external support information subsystem mainly includes: an external support information center module accessing the application server in the CTC central system, and an external support information station module accessing the station extension in the CTC station system; the external support information center module receives and records the status information of the external interface system from the CTC central system forwarded by the application server, the synchronization information of the external interface system status of the CTC station system forwarded by the external support information station module, and the clock information inside the CTC system sent by the application server; among them, the status information of the external interface system includes: main and standby status information and execution status information; the external support information station module receives and records the status information of the external interface system of the CTC station system at the station where it is located, and the clock information inside the CTC system sent by the external support information center module, and the external support information station module sends the status information of the CTC external interface system at the station where it is located to the external support information center module as synchronization information; When the startup conditions are met, the external support information center module provides external support information for the external interface system of the CTC central system, and the external support information station module provides external support information for the external interface system of the CTC station system; among them, the external support information includes the status information and clock information provided to the corresponding external interface system.

[0011] An external interface system status maintenance method during the shutdown period of the high-speed rail CTC skylight, implemented based on the aforementioned external interface system status maintenance system during the shutdown period of the high-speed rail CTC skylight. The method includes: when the startup conditions are met, the external support information center module provides external support information for the external interface system of the CTC central system, and the external support information station module provides external support information for the external interface system of the CTC station system; among them, the external support information includes the status information and clock information provided to the corresponding external interface system.

[0012] As can be seen from the technical solution provided by the present invention above, a CTC external support information subsystem with a two-level structure is designed. The two-level structure is respectively an external support information center module and an external support information station module configured in the CTC central system and the CTC station system. Through the CTC external support information subsystem, synchronous recording of information of the external interface system is realized, and during the period when the high-speed rail CTC skylight is deactivated, it can replace the closed CTC subsystem and continuously provide external support information, which has practical significance for the accurate restoration of the overall business at the end of the skylight and the reduction of the skylight impact duration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 Schematic diagram of an external interface system status maintenance system during the period when the high-speed rail CTC skylight is deactivated provided by an embodiment of the present invention; Figure 2 Schematic diagram of the cross-interconnection of the station extension with the interlocking and train control provided by an embodiment of the present invention; Figure 3 Schematic diagram of the information verification process after the dual-machine system switchover provided by an embodiment of the present invention; Figure 4 Schematic diagram of the method for establishing a temporary information channel provided by an embodiment of the present invention; Figure 5 Schematic diagram of the information flow direction of the CTC external support information subsystem provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] First, the terms that may be used in this article are described as follows: Descriptions with terms such as "including", "comprising", "containing", "having" or other similar semantics shall be construed as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article, etc.) shall be construed as not only including the explicitly listed technical feature element, but also including other technical feature elements well-known in the art that are not explicitly listed.

[0017] The term "consisting of" means excluding any technical feature element not explicitly listed. If this term is used in a claim, it will make the claim a closed type, so that it does not include technical feature elements other than the explicitly listed ones, except for related conventional impurities. If this term only appears in a sub-clause of a claim, then it only limits the elements explicitly listed in that sub-clause, and the elements recorded in other sub-clauses are not excluded from the overall claim.

[0018] Unless otherwise explicitly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0019] The following provides a detailed description of a method and system for maintaining the state of the external interface system during the suspension of the high-speed rail CTC skylight. The content not described in detail in the embodiments of the present invention belongs to the prior art well-known to those of ordinary skill in the art. For those conditions not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. For the instruments used in the embodiments of the present invention that are not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0020] Embodiment 1 The embodiment of the present invention provides a system for maintaining the state of the external interface system during the suspension of the high-speed rail CTC skylight, which mainly includes: a CTC external support information subsystem provided in the CTC system, used for maintaining the state of the external interface system during the suspension of the high-speed rail CTC skylight, wherein the CTC system is a centralized traffic control system, including: a CTC central system and a CTC station system.

[0021] In the embodiments of the present invention, the CTC external support information subsystem mainly includes: an external support information center module accessing the application server in the CTC central system, and an external support information station module accessing the station extension in the CTC station system; the external support information center module receives and records the status information (primary and standby status information and execution status information of the external interface system) from the external interface system of the CTC central system forwarded by the application server, the synchronization information of the status of the external interface system of the CTC station system forwarded by the external support information station module, and the clock information inside the CTC system sent by the application server; the external support information station module receives and records the status information (primary and standby status information and execution status information of the external interface system) of the external interface system of the CTC station system where it is located, and the clock information inside the CTC system sent by the external support information center module, and the external support information station module sends the status information of the CTC external interface system of the station where it is located to the external support information center module as synchronization information.

[0022] When the startup conditions are met, the external support information center module provides external support information for the external interface system of the CTC central system, and the external support information station module provides external support information for the external interface system of the CTC station system; wherein, the external support information includes the status information (i.e., the corresponding primary and standby status information, execution status information) provided to the corresponding external interface system and the clock information.

[0023] Preferably, the startup conditions include: within a set time threshold range, the status information feedback from the corresponding external interface system is not received; or, the interface interruption alarm information is received a set number of times.

[0024] Preferably, a direct connection logical channel is provided between the external support information center module and the external support information station module; when the external support information center module receives a synchronization request sent by the external support information station module through the direct connection logical channel, it sends the last received synchronization information from the external support information station module to the corresponding external support information station module through the direct connection logical channel.

[0025] Preferably, both the application server and the station extension are in a dual-machine configuration; during the period when the CTC skylight in high-speed rail is deactivated, when the main machines of the application server and the station extension are shut down and the corresponding standby machines are enabled, the startup conditions of the external support information center module and the external support information station module are not met. In this case, the corresponding standby machines undertake the business functions of the main machines and send clock information to the corresponding external interface systems.

[0026] Preferably, both the station extension and the external interface system of the CTC station system connected thereto are dual-machine configured; during the period when the high-speed rail CTC skylight is deactivated, when the main machine of the station extension is shut down and the standby machine is activated, the startup condition of the station module that does not meet the external support information is not satisfied. In this case, the standby machine of the station extension arbitrates according to the main-standby state of the external interface system of the CTC station system, and outputs the main-standby arbitration information to the corresponding external interface system of the CTC station system.

[0027] Preferably, when the main machines of the application server and the station extension are shut down and their respective standby machines take over the corresponding host service functions, the standby machine of the application server sends a verification request message to the external support information center module, and the standby machine of the station extension sends a verification request message to the external support information station module; the external support information center module returns the execution status information of the external interface system of the CTC center system to the standby machine of the application server according to the verification request message, and the standby machine of the application server transmits it to the corresponding interface server. The standby machine of the application server and the interface server verify the execution status information of the external interface system of the CTC center system; wherein, the interface server belongs to the CTC center system and is used to connect the application server and the external interface system of the CTC center system; the external support information station module returns the execution status information of the external interface system of the CTC station system to the standby machine of the station extension according to the verification request message, and the station extension verifies the execution status information of the external interface system of the CTC station system.

[0028] Preferably, a direct connection channel is configured between the external support information center module and the interface server, and port occupancy software is configured in the interface server; the interface server belongs to the CTC center system and is used to connect the application server and the external interface system of the CTC center system; when the external support information center module is started, it sends an instruction to the port occupancy software through the direct connection channel to occupy the port of the interface server where it is located; after that, the external support information center module sends the external support information to the external interface system of the CTC center system through the corresponding interface server port; when the application server and the interface server are fully activated and self-check and recover to normal, the application server sends a port occupancy release application message to the external support information center module, and the external support information center module controls the port occupancy software to release the occupied interface server port.

[0029] Optionally, the external support information station module is deployed in the signal maintenance terminal of the CTC station system, and port occupancy software is configured in the integrated processor of the CTC station system. When the external support information station module is started, it sends an instruction to the port occupancy software of the integrated processor to occupy the port of the integrated processor where it is located; after that, the external support information station module sends the external support information to the external interface system of the CTC station system through the corresponding integrated processor port.

[0030] Preferably, expand the communication protocol of the CTC system to enable data transmission between the CTC external support information subsystem and the external interface systems of the CTC central system and the CTC station system.

[0031] In order to more clearly demonstrate the technical solution provided by the present invention and the resulting technical effects, the system provided by the embodiments of the present invention will be described in detail below with specific embodiments.

[0032] Considering that in the current solution, after the CTC system is restored, the dispatcher, station attendant or signal maintenance personnel are mainly responsible for confirming the status of the external interface system and restoring the settings. In fact, the way to close the CTC subsystem during the skylight period is to close some software, and the hardware resources and network channels of the CTC system are usually not affected. Therefore, by utilizing the stable hardware resources and network channels of the CTC system, a state maintenance system for the external interface system during the high-speed railway CTC skylight deactivation period is designed to enable the timely restoration of the status of the external interface system when the skylight ends and the complete functions of the CTC are enabled, which has practical significance for the accurate restoration of the overall business at the end of the skylight and the reduction of the skylight impact duration.

[0033] The following is a detailed introduction to the system from the following three aspects: First, based on the existing CTC architecture, design a CTC external support information subsystem for maintaining the status of the external interface system, which replaces the closed CTC subsystem during the skylight period and continuously provides external support information. Second, analyze the status maintenance requirements of the external interface system during the skylight deactivation period and design a method for sending external information of high-speed railway CTC during the skylight period, and design a method for the CTC to maintain the status of the external interface system from three perspectives: function startup conditions, dual-machine system information synchronization mechanism, and establishment and solution of temporary communication channels. Third, expand the existing CTC communication protocol in combination with the communication flow direction to realize the external information support function during the skylight period.

[0034] I. Design of the CTC external support information subsystem.

[0035] 1. Analysis of the types of CTC external support information and system structure.

[0036] The CTC system is the core technical equipment for train operation dispatching services. The dispatcher mainly understands and controls the train operation status within the dispatching section through the CTC system. The external interface system of the CTC system receives and executes the relevant information sent by the CTC to correctly maintain its own working status and accurately complete the dispatcher's operation intention. The CTC system includes the CTC central system and the CTC station system. The external interface systems of the CTC central system include TSRS, RBC, TDMS, and GSM-R. The external interface systems of the CTC station system include interlocking and train control systems, such asFigure 1 As shown in the figure. The external interface system of the CTC central system refers to the external interface system that realizes information interaction through the interface server of the CTC central system; the external interface system of the CTC station system refers to the external interface system that realizes information interaction through the station sub - machine interface system.

[0037] The CTC central system realizes information interconnection with the corresponding external interface systems through independent interface servers respectively. The other ends of the interface servers are all connected to the application server. The CTC station system exchanges information with the interlocking and train control systems through the station sub - machine. Among them, the CTC internal information forwarding devices such as the application server, communication server, and station sub - machine are all dual - machine systems, the TSRS, RBC, and GSM - R interfaces are dual - machine systems, and the TDMS interface is a single - machine system, as Figure 1 shown. Considering that Figure 1 the communication server, train operation terminal, signal maintenance terminal, self - discipline machine, train dispatcher console, and various interface servers shown in the figure all belong to the existing parts of the CTC system, they will not be elaborated here.

[0038] 2. Secondary structure design of the CTC external support information subsystem.

[0039] The CTC external support information subsystem includes: an external support information center module and an external support information station module (which can be simply referred to as the center module and the station module), which are respectively connected to the application server and the station sub - machine. The system structure is as Figure 1 shown. The external support information center module is connected to the application server as an information flow branch node and has the ability of two - way communication. Modify the application server synchronously to have the access ability of the external support information center module. Preferably, due to the large number of stations, in order to reduce the difficulty of hardware deployment, the external support information station module can run in the integrated processor and share hardware resources with the self - discipline machine and the station sub - machine.

[0040] The external support information center module receives and records the status information of the external interface system of the CTC central system (the main - standby status information and execution status information of the external interface system), the synchronization information sent by the external support information station module, and the clock information inside the CTC system; the external support information station module receives and records the status information of the external interface system of the CTC station system in the station where it is located and the clock information inside the CTC system, and sends synchronization information to the center module. There is a direct connection logical channel between the external support information center module and the external support information station module. The synchronization information from the external support information station module to the external support information center module is transmitted through this channel, and the clock information of the external support information station module is directly obtained from the external support information center module through the direct connection channel.

[0041] Since the business functions of the CTC station system rely on the CTC central system, there are situations where some functions of the CTC station system are disabled while the CTC central system remains operational. However, there will never be a state where the CTC central system is disabled while the CTC station system remains operational. That is, the disablement of the CTC central system is a sufficient but not necessary condition for the disablement of the CTC station system. Therefore, during the skylight period, the availability and stability of the external support information center module are higher than those of the external support information station module. When the external support information station module is unable to operate continuously due to power failure or restart of the station self-discipline machine equipment (or other reasons), an attempt can be made to obtain synchronization information from the external support information center module. When the business disablement of the CTC station system ends and resumes, the external support information station module sends a synchronization request to the external support information center module, and the external support information center module responds to this request and sends the last synchronization information obtained for this station to the external support information station module. The "request-response" mode is adopted instead of the mode where the external support information center module automatically sends information after detecting the interruption and recovery of the external support information station module because there may be a situation where the channel between the CTC central system and the CTC station system is interrupted. During the channel interruption period, the external support information center module cannot monitor the status of the external support information station module and cannot obtain the latest synchronization information, but the external support information station module still remains in a correct and effective working state.

[0042] II. Method for Sending External Information of High-Speed Rail CTC During the Skylight Period.

[0043] 1. Function Startup Conditions.

[0044] To avoid increasing the workload of CTC users (i.e., dispatchers and equipment managers), the external support function of the CTC external support information subsystem adopts a self-starting method. When the primary and standby machines of the application server and the station sub-machine are both in the shutdown state, and the corresponding modules (i.e., the external support information center module and the external support information station module) cannot obtain the status information (the primary and standby status information and the execution status information of the external interface system) forwarded by the external interface within the function activation time threshold range, the external support information sending function for the corresponding external interface system is enabled. Due to the information packet loss phenomenon caused by the instantaneous channel failure of CTC, to distinguish the instantaneous channel failure from the skylight plan deactivation, the function activation time threshold can be set to 20s, which is longer than the convergence time of the CTC system channel routing selection, that is, the routing selection time of the CTC system in the case of channel failure can be completed within 20s, avoiding the CTC external support information subsystem misjudging the information interruption caused by the channel failure as the skylight state. Among them, enabling the external support information sending function of the corresponding external interface subsystem means that when the CTC external support information subsystem does not receive the status information of a certain external interface system within the time threshold (for example, the primary and standby machines of the application server and the station sub-machine are both in the shutdown state), at this time, start sending all the external support information required by the corresponding external interface system; for example, if the external support information center module does not receive the status information of the TSRS for 20s, then start sending all the external support information that needs to be sent by the TSRS interface, including the clock information and the execution status information of the temporary speed limit command. After receiving the external support information sent by CTC, the external interface system will feedback the status information.

[0045] In addition to the above function activation conditions based on the time threshold, the interface interruption alarm information sent by the CTC central system and the station signal maintenance terminal can also be used as the activation condition. Taking the station signal maintenance terminal as an example, it polls the interface status once every 3s, and the CTC external support information subsystem starts the external support information sending function after continuously receiving the set number of times (for example, 7 times, and about 21s for 7 cycles).

[0046] 2. Information synchronization mechanism for dual-machine systems.

[0047] The internal information forwarding equipment of CTC and external interface systems such as TSRS, RBC, interlocking, and train control are all dual-machine systems. During the skylight period, when the host interface system is closed, the standby machine system undertakes the host business function and sends support information externally.

[0048] Regarding the clock information, since the internal information forwarding equipment and interface equipment of CTC both have independent clock information synchronization mechanisms, and the reliability of the standby machine clock information is not lower than that of the host, the standby machine does not receive the relevant information of the CTC external support information subsystem after it is enabled, and still provides timing for the external interface system according to its own system time.

[0049] The station interlocking and train control systems need to continuously receive the primary and standby arbitration information sent by the CTC station system. Both the interlocking and train control systems are cross-connected with the dual-system of the station sub-system in the CTC station system (denoted as A and B for the dual-system) to form four information transmission channels, as Figure 2 shown. The station sub-system comprehensively analyzes the stability and real-time status of System A or System B in the external interface system based on the information received from the four information channels, selects one of them as the primary device, and periodically sends the primary and standby status maintenance information to the external interface system until the primary and standby arbitration results change. The primary and standby status arbitration scheme can be implemented with reference to conventional technologies and will not be elaborated in this invention. Since the connection channels to the external interface system change after the standby machine is enabled, the standby machine may make an arbitration result different from that of the primary machine. Therefore, the standby machine does not receive the information related to the CTC external support information sub-system after it is enabled, and sends support information externally according to the arbitration result of the standby machine.

[0050] The execution status information of the CTC external interface system is related to train operation safety. In the dual-system (mainly referring to the internal information forwarding device of CTC), there is a synchronization mechanism from the primary machine to the standby machine. However, due to packet loss in the channel information or the status of the primary machine itself, the standby machine system may not be able to obtain the latest synchronization information in time. An execution status information verification mechanism for the external interface system is added. When the primary machine shuts down and the standby machine is enabled, the standby machine sends a verification request message to the CTC external support information sub-system. After receiving the verification request message, the CTC external support information sub-system returns the execution status information. All devices through which the information flows compare the execution status information with the execution status information stored in their own storage. Devices with inconsistent comparison results send alarm messages to remind manual confirmation.

[0051] Taking the verification process of the TSRS external support information after the application server primary machine shuts down and triggers a switchover as an example, the verification process after the switchover is as Figure 3 shown. The application server primary machine shuts down, and the standby machine is enabled and sends a verification request message to the external support information center module. The external support information center module sends the execution status information to the application server and the TSRS interface server. After receiving the information, the application server and the TSRS interface server compare it with the execution status information stored in their own storage and send the comparison result to the CTC external support information sub-system. If the comparison result of the application server is inconsistent, the application server sends an alarm message.

[0052] 3. Establishment and solution of the temporary communication channel.

[0053] A temporary communication channel needs to be established when there is no dual-system or the dual-system synchronization mechanism fails. Specifically: In the case of only having a single-system or both dual-systems shutting down simultaneously, there is no dual-system synchronization mechanism, and the external support information channel is in an interrupted state. It is necessary to use the existing CTC network channel and hardware devices to establish a temporary communication channel for the external support information.

[0054] Since the external support information station module can share hardware resources with the station extension, after the sending function of the external support information station module is started, it can automatically occupy the port connected to the external interface system and send the master-slave status arbitration information according to the interface communication protocol. After the station extension is started, the external support information station module releases the channel port.

[0055] Considering that the signal maintenance terminal undertakes operations such as shunting fault setting and equipment status monitoring during the skylight period and has high availability. In addition to adopting the above-mentioned scheme of sharing hardware resources with the station extension, the external support information station module can also be deployed in the station signal maintenance terminal equipment, and port occupancy software is added to the integrated processor. In the case where both station extension computers are shut down, the external support information station module sends external support information to the external interface system (interlocking, train control) through the port occupancy software.

[0056] The external support information center module can run independently in a server. When the external support information center module is enabled, a temporary information channel needs to be established, such as Figure 4 shown. Figure 4 In, taking the TSRS interface server as an example, a scheme for establishing a temporary information channel is provided. In this example, port occupancy software is pre-installed in the TSRS interface server. When both the dual-machine system is shut down or the single-machine system is shut down, the external support information center module cannot effectively obtain the status information. Then, the external support information center module sends an instruction to the port occupancy software through the direct connection channel to forcibly occupy the port of the interface server where it is located. The external support information center module sends external support information to the external interface system through the direct connection channel via the port occupancy software. When the application server and the corresponding interface server are fully enabled and self-check and recover to normal, the application server sends a port occupancy release application information to the external support information center module, and the external support information center module controls the port occupancy software to release the occupied port, and the external support information center module stops sending external support information at the same time.

[0057] III. Expand the existing CTC communication protocol in combination with the communication flow.

[0058] The CTC external support information subsystem is connected to the existing CTC system, and the flow of the newly added information is as Figure 5 shown. Among them, the verification result information and the alarm information follow the existing CTC communication protocol. Formulate the formats of the external support information packet and the occupation (release) port instruction information packet, and use the existing format to expand and modify the request information packet format.

[0059] 1. External support information.

[0060] The external support information includes the status information and clock information of the external interface system. Among them, the status information of the external interface system is transmitted within the CTC system to achieve synchronization between devices of the external support information. As shown in Table 1, it is the packet format of the external support information (clock information is omitted). The external support information is not only used to send to the external interface system, but also serves as the synchronization information transmitted within the CTC system. When used to send to the external interface system, the transmitted data includes the status information and clock information of the external interface system. When used as synchronization information, the transmitted data mainly includes the status information of the external interface system.

[0061] The situation where the external support information serves as synchronization information exists in multiple scenarios. Some examples of scenarios are provided below.

[0062] (1) The synchronization information periodically sent by the station module of the external support information to the central module of the external support information, that is: the station module of the external support information records the status information of the external interface system of the station where it is located.

[0063] (2) After receiving the synchronization request from the station module of the external support information, the central module of the external support information sends the corresponding synchronization information to the station module of the external support information, that is: the station module of the external support information records the status information of the external interface system of the station where it is located.

[0064] (3) After the standby machine of the dual-machine system of the internal information forwarding device in the CTC takes over the service, it sends a verification request message to the external support information subsystem of the CTC. The external support information subsystem of the CTC receives the request message and sends synchronization information (the execution status information contained is used for information verification) for information verification.

[0065] Similarly, when the external support information is used to send to the external interface system, there are also multiple scenarios. Some examples of scenarios are provided below.

[0066] (1) When it is necessary to enable the port occupancy software in the interface server and establish a temporary information channel, the central module of the external support information sends the external support information through the corresponding interface server port.

[0067] (2) When it is necessary to enable the port occupancy software in the integrated processor and establish a temporary information channel, the station module of the external support information sends the external support information through the integrated processor port.

[0068] Table 1: Packet format of external support information

[0069] 2. Port occupancy (release) instruction information.

[0070] The port occupancy software is deployed in the central TSRS, RBC, TDMS, and GSM-R interface servers. It receives the occupancy (release) port instruction information sent by the external support information center module and performs port occupancy and release operations on the interface servers. The packet format of the occupancy (release) port instruction information is shown in Table 2.

[0071] Table 2: Packet Format of Occupancy (Release) Port Instruction Information

[0072] Of course, in combination with the optional solutions provided above, port occupancy software can also be added to the integrated processor, and the information content such as port numbers in Table 2 above can be adjusted accordingly.

[0073] 3. Request Information.

[0074] The request information uses the packet format in the existing protocol and adds 3 categories in the information type field, namely the synchronization request for external support services, the execution status verification request, and the release port occupancy application information. The packet format of the request information is shown in Table 3.

[0075] Table 3: Packet Format of Request Information

[0076] The above solution provided by the embodiments of the present invention designs a CTC external support information subsystem with a two-level structure. The two-level structure is respectively the external support information center module and the external support information station module configured in the CTC central system and the CTC station system. Through the CTC external support information subsystem, the synchronous recording of information in the external interface system is realized, and during the high-speed rail CTC skylight outage period, it can replace the closed CTC subsystem and continuously provide external support information, which has practical significance for the accurate restoration of the overall business at the end of the skylight and the reduction of the skylight impact duration.

[0077] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be assigned to different functional modules according to needs, that is, the internal structure of the system is divided into different functional modules to complete all or part of the functions described above.

[0078] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiments can be implemented by software or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions of the above embodiments can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

[0079] Embodiment 2 The embodiment of the present invention provides a method for maintaining the state of an external interface system during the suspension of the high-speed rail CTC skylight. This method is mainly implemented based on the external interface system state maintenance system during the suspension of the high-speed rail CTC skylight provided in the foregoing embodiment. The method includes: when the startup condition is met, the external support information center module provides external support information for the external interface system of the CTC center system, and the external support information station module provides external support information for the external interface system of the CTC station system; wherein, the external support information includes the status information and clock information provided to the corresponding external interface system.

[0080] Considering that the foregoing system has elaborated in detail the working process of the entire system, it will not be repeated here.

[0081] As described above, only the specific preferred embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The information disclosed in the background art part of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art.

Claims

1. An external interface system status maintenance system during the suspension of the high - speed rail CTC skylight, characterized in that, Including: A CTC external support information subsystem installed in the CTC system, which is used to maintain the status of the external interface system during the suspension of the high-speed rail CTC skylight. Among them, the CTC system is a centralized traffic control system, including: a CTC central system and a CTC station system; The CTC external support information subsystem mainly includes: an external support information center module accessing the application server in the CTC central system, and an external support information station module accessing the station extension in the CTC station system; the external support information center module receives and records the status information of the external interface system from the CTC central system forwarded by the application server, the synchronization information of the status of the external interface system of the CTC station system forwarded by the external support information station module, and the clock information inside the CTC system sent by the application server; among them, the status information of the external interface system includes: primary and standby status information and execution status information; the external support information station module receives and records the status information of the external interface system of the CTC station system where it is located, and the clock information inside the CTC system sent by the external support information center module, and the external support information station module sends the status information of the CTC external interface system where it is located to the external support information center module as synchronization information; When the startup conditions are met, the external support information center module provides external support information for the external interface system of the CTC central system, and the external support information station module provides external support information for the external interface system of the CTC station system; among them, the external support information includes the status information and clock information provided to the corresponding external interface system.

2. The external interface system status maintenance system during the CTC skylight outage period of high-speed rail according to claim 1, characterized in that, There is a direct connection logical channel between the external support information center module and the external support information station module; when the external support information center module receives a synchronization request sent by the external support information station module through the direct connection logical channel, it sends the last received synchronization information from the external support information station module to the external support information station module through the direct connection logical channel.

3. The external interface system status maintenance system during the CTC skylight outage period of high-speed rail according to claim 1, characterized in that, The startup conditions include: within a set time threshold range, no status information feedback from the corresponding external interface system is received; or, a set number of interface interruption alarm messages are received.

4. The external interface system status maintenance system during the CTC skylight deactivation period of high-speed railways according to claim 1 or 3, characterized in that, Both the application server and the station extension are configured with dual machines; during the suspension of the high-speed rail CTC skylight, when the main machines of the application server and the station extension are shut down and the corresponding standby machines are enabled, the startup conditions of the external support information center module and the external support information station module are not met. In this case, the corresponding standby machines undertake the business functions of the corresponding main machines and send clock information to the corresponding external interface systems.

5. The external interface system status maintenance system during the shutdown period of the high-speed rail CTC skylight according to claim 1 or 3, characterized in that, Both the station extension and the external interface system of the CTC station system connected thereto are dual-machine configurations; during the period when the CTC skylight of the high-speed railway is deactivated, when the main machine of the station extension is shut down and the standby machine is activated, the startup condition of the external support information station module is not met. In this case, the standby machine of the station extension arbitrates according to the main-standby status of the external interface system of the CTC station system, and outputs the main-standby arbitration information to the corresponding external interface system of the CTC station system.

6. The external interface system status maintenance system during the high-speed rail CTC skylight outage period according to claim 4, wherein It also includes: When the application server and the main machine of the station extension are shut down and their respective standby machines undertake the corresponding host service functions, the standby machine of the application server sends a verification request message to the external support information center module, and the standby machine of the station extension sends a verification request message to the external support information station module. The external support information center module returns the execution status information of the external interface system of the CTC central system to the standby machine of the application server according to the verification request message, and the standby machine of the application server transmits it to the corresponding interface server. The standby machine of the application server and the interface server verify the execution status information of the external interface system of the CTC central system; among them, the interface server belongs to the CTC central system and is used to connect the application server and the external interface system of the CTC central system. The external support information station module returns the execution status information of the external interface system of the CTC station system to the standby machine of the station extension according to the verification request message, and the station extension verifies the execution status information of the external interface system of the CTC station system.

7. An external interface system status maintenance system during the deactivation of the high-speed rail CTC skylight according to claim 1, characterized in that It also includes: The external support information center module and the interface server are configured with a direct connection channel, and port occupancy software is configured in the interface server. The interface server belongs to the CTC central system and is used to connect the application server and the external interface system of the CTC central system. When the external support information center module starts up, it sends an instruction to the port occupancy software through the direct connection channel to occupy the port of the interface server where it is located; afterwards, the external support information center module sends the external support information to the external interface system of the CTC central system through the corresponding interface server port. When the application server and the interface server are fully activated and self-check and recover to normal, the application server sends a port occupancy release application message to the external support information center module, and the external support information center module controls the port occupancy software to release the occupied interface server port.

8. An external interface system status maintenance system during the outage of the high-speed rail CTC skylight according to claim 1, characterized in that, It also includes: The external support information station module is deployed in the signal maintenance terminal of the CTC station system, and port occupancy software is configured in the integrated processor of the CTC station system. When the external support information station module starts up, it sends an instruction to the port occupancy software of the integrated processor to occupy the port of the integrated processor where it is located; afterwards, the external support information station module sends the external support information to the external interface system of the CTC station system through the corresponding integrated processor port.

9. An external interface system status maintenance system during the deactivation of the high-speed rail CTC skylight according to claim 1, characterized in that, It also includes: Expand the communication protocol of the CTC system to realize data transmission between the CTC external support information subsystem and the external interface systems of the CTC central system and the CTC station system.

10. A method for maintaining the state of an external interface system during the suspension of the high-speed rail CTC skylight, characterized in that, Based on the implementation of the external interface system status maintenance system during the high-speed railway CTC skylight deactivation period as described in any one of claims 1 to 9, the method includes: when the start-up conditions are met, the external support information center module provides external support information for the external interface system of the CTC central system, and the external support information station module provides external support information for the external interface system of the CTC station system; wherein, the external support information includes status information and clock information provided to the corresponding external interface system.

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