State detection and high-reliability guarantee method and system for vehicle-mounted access unit

Abstract

The invention relates to the technical field of time synchronization, in particular to a state detection and high-reliability guarantee method and system for a vehicle-mounted access unit. According to the vehicle-mounted access unit state detection and high-reliability guarantee method, a vehicle-mounted access unit management platform is deployed in a ground control system, vehicle-mounted access unit TAU devices at the head and the tail of a train are respectively deployed in two different Ethernet networks, direct communication links are not provided, communication cannot be directly carried out, and the reliability of the state detection and high-reliability guarantee of the vehicle-mounted access unit is improved. The train-mounted access unit management platform communicates with the train-mounted access unit management platform through a wireless cellular network and transmits train service data to the ground; and the vehicle-mounted access unit management platform detects the state of the equipment and sets the main and standby states of the equipment. According to the state detection and high-reliability guarantee method and system for the vehicle-mounted access unit, the vehicle-mounted access unit management platform carries out state detection and controls main and standby setting and switching, so that main and standby switching in a network environment without a direct communication link between equipment is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of Internet of Things, and in particular to a method and system for status detection and high reliability assurance of a vehicle-mounted access unit. Background Art

[0002] Metro train onboard access units (TAUs) are deployed at the front and rear of each train. The train's primary and backup service systems connect to the TAUs, respectively. These systems communicate with the ground control system via a wireless cellular network, transmitting train service data to the ground. Highly reliable primary and backup solutions are required for both the TAUs.

[0003] In the current industry-standard master-slave solution, the front and rear TAUs are deployed on the same Ethernet network, enabling direct communication and monitoring of their operational status. Initially, the devices are set to primary and backup, with the primary device providing services. The primary device periodically sends heartbeat messages to the backup device. If the backup device does not receive a heartbeat message within a certain period of time, it assumes the primary device is faulty. If the primary device fails, the backup device takes over and provides services. When the original primary device recovers, it reassumes primary status and resumes service.

[0004] For some business scenarios with higher security requirements, the front and rear TAUs cannot be deployed in the same Ethernet network. They do not have a direct communication link, cannot communicate directly, and cannot detect each other's status. Therefore, active-standby switching cannot be achieved, and high reliability protection cannot be provided.

[0005] Based on this, the present invention proposes a method and system for status detection and high reliability assurance of a vehicle-mounted access unit.

[0006] It is proposed to deploy a "vehicle access unit management platform" on the ground. The management platform can communicate directly with the TAU at the front and rear of the vehicle respectively. The management platform is responsible for detecting the status of the equipment and setting the primary and backup status of the equipment. The method of achieving high reliability of the primary and backup status of the TAU at the front and rear of the vehicle is controlled by the management platform. Summary of the Invention

[0007] In order to overcome the defects of the prior art, the present invention provides a simple and efficient method and system for status detection and high reliability assurance of a vehicle-mounted access unit.

[0008] The present invention is achieved through the following technical solutions:

[0009] A method for detecting the status of a vehicle-mounted access unit and ensuring high reliability is provided. A vehicle-mounted access unit management platform is deployed in a ground control system to detect the status of the device and set the primary and standby status of the device.

[0010] The subway train's onboard access unit (TAU) equipment is deployed at the front and rear of the subway train, and the train's main and backup service systems are connected to the onboard access unit (TAU) equipment deployed at the front and rear of the train respectively.

[0011] The on-board access unit (TAU) device communicates with the on-board access unit management platform deployed in the ground control system via a wireless cellular network, transmitting train service data to the ground.

[0012] Furthermore, the TAU devices deployed at the front and rear of the train are deployed in two different Ethernet networks, lacking direct communication links and unable to communicate directly.

[0013] The following steps are involved:

[0014] Step S1: Vehicle access unit TAU ​​equipment

[0015] The vehicle access unit TAU ​​device periodically sends heartbeat messages to the vehicle access unit management platform to report device information and notify the vehicle access unit management platform of its own status; and updates its own active and standby status according to the active and standby status synchronization message sent by the vehicle access unit management platform;

[0016] Step S2: Vehicle access unit management platform

[0017] The on-board access unit management platform receives the heartbeat message reported by the on-board access unit TAU ​​device, and sets and switches the main device by detecting the heartbeat message and network delay. It also notifies the on-board access unit TAU ​​devices deployed at the front and rear of the train of the main device information through the main and backup status synchronization message to realize the setting and switching of the main device.

[0018] In the step S1, the vehicle access unit TAU ​​device sets its own master / slave state according to the master / slave state synchronization message sent by the vehicle access unit management platform;

[0019] If the device information in the master-slave status synchronization message matches itself, the corresponding vehicle access unit TAU ​​device is set as the master device; if not, it is set as the backup device.

[0020] In step S2, the vehicle access unit management platform determines whether the primary device has been set:

[0021] If the primary device is not set, set the device currently reporting the heartbeat message as the primary device, record the corresponding device information on the vehicle access unit management platform, and set the corresponding device status to primary; send a primary-backup status synchronization message to notify the vehicle access unit TAU ​​device to be set as the primary device;

[0022] If the primary device is currently set, the newly reported device information will be recorded and the corresponding device status will be set to standby;

[0023] The current active device information is notified to the vehicle access unit TAU ​​device through the active-standby status synchronization message.

[0024] In step S2, the vehicle access unit management platform periodically detects the heartbeat message reporting status of the primary device and the delay from the vehicle access unit management platform to the vehicle access unit TAU ​​device to determine whether an abnormality occurs:

[0025] If an abnormality occurs, the vehicle access unit management platform initiates a master-slave switch, sets the current master device status to the backup device, and sets the backup device recorded by the vehicle access unit management platform to the master device; and notifies the vehicle access unit TAU ​​device of the updated master device information through the master-slave status synchronization message;

[0026] If there is no abnormality, the current active device information is notified to the vehicle access unit TAU ​​device through the active-standby status synchronization message.

[0027] In step S2, if the period during which the vehicle access unit TAU ​​device fails to report a heartbeat message exceeds a user-defined threshold, or the delay is greater than a preset threshold, it is considered that the current active device is abnormal.

[0028] A vehicle access unit status detection and high reliability assurance system, used to implement the above method, includes a vehicle access unit management platform and a vehicle access unit TAU ​​device;

[0029] The vehicle access unit management platform is deployed in the ground control system and is responsible for detecting the equipment status and setting the primary and standby status of the equipment;

[0030] The subway train's onboard access unit (TAU) equipment is deployed at the front and rear of the train. The train's main and backup service systems are connected to the TAU equipment deployed at the front and rear of the train respectively.

[0031] The on-board access unit (TAU) device communicates with the on-board access unit management platform deployed in the ground control system via a wireless cellular network to transmit train service data to the ground;

[0032] Moreover, the on-board access unit (TAU) devices deployed at the front and rear of the train are respectively deployed in two different Ethernet networks, and do not have direct communication links, making direct communication impossible.

[0033] A state detection and high-reliability assurance computing device for a vehicle-mounted access unit, comprising:

[0034] One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for performing any of the above methods.

[0035] A computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions, which, when executed by a status detection and high-reliability assurance computing device of an on-board access unit, enable the status detection and high-reliability assurance computing device of the on-board access unit to perform any of the above methods.

[0036] The beneficial effects of the present invention are: the status detection and high reliability guarantee method and system of the vehicle-mounted access unit, the vehicle-mounted access unit TAU ​​devices at the front and rear of the vehicle communicate with the vehicle-mounted access unit management platform respectively, and the vehicle-mounted access unit management platform performs status detection and controls the main and standby settings and switching, realizing the main and standby switching in a network environment where there is no direct communication link between devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Attachment Figure 1 Schematic diagram of the status detection and high reliability assurance system architecture of the vehicle-mounted access unit of the present invention.

[0039] Attachment Figure 2 Schematic diagram of the status detection process of the vehicle-mounted access unit of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0041] The vehicle access unit status detection and high reliability guarantee method deploys a vehicle access unit management platform in the ground control system, which is responsible for detecting the device status and setting the primary and standby status of the device;

[0042] The subway train's onboard access unit (TAU) equipment is deployed at the front and rear of the subway train, and the train's main and backup service systems are connected to the onboard access unit (TAU) equipment deployed at the front and rear of the train respectively.

[0043] The on-board access unit (TAU) device communicates with the on-board access unit management platform deployed in the ground control system via a wireless cellular network, transmitting train service data to the ground.

[0044] Furthermore, the TAU devices deployed at the front and rear of the train are deployed in two different Ethernet networks, lacking direct communication links and unable to communicate directly.

[0045] The following steps are involved:

[0046] Step S1: Vehicle access unit TAU ​​equipment

[0047] The vehicle access unit TAU ​​device periodically sends heartbeat messages to the vehicle access unit management platform to report device information and notify the vehicle access unit management platform of its own status; and updates its own active and standby status according to the active and standby status synchronization message sent by the vehicle access unit management platform;

[0048] Step S2: Vehicle access unit management platform

[0049] The on-board access unit management platform receives the heartbeat message reported by the on-board access unit TAU ​​device, and sets and switches the main device by detecting the heartbeat message and network delay. It also notifies the on-board access unit TAU ​​devices deployed at the front and rear of the train of the main device information through the main and backup status synchronization message to realize the setting and switching of the main device.

[0050] In the step S1, the vehicle access unit TAU ​​device sets its own master / slave state according to the master / slave state synchronization message sent by the vehicle access unit management platform;

[0051] If the device information in the master-slave status synchronization message matches itself, the corresponding vehicle access unit TAU ​​device is set as the master device; if not, it is set as the backup device.

[0052] In step S2, the vehicle access unit management platform determines whether the primary device has been set:

[0053] If the primary device is not set, set the device currently reporting the heartbeat message as the primary device, record the corresponding device information on the vehicle access unit management platform, and set the corresponding device status to primary; send a primary-backup status synchronization message to notify the vehicle access unit TAU ​​device to be set as the primary device;

[0054] If the primary device is currently set, the newly reported device information will be recorded and the corresponding device status will be set to standby;

[0055] The current active device information is notified to the vehicle access unit TAU ​​device through the active-standby status synchronization message.

[0056] In step S2, the vehicle access unit management platform periodically detects the heartbeat message reporting status of the primary device and the delay from the vehicle access unit management platform to the vehicle access unit TAU ​​device to determine whether an abnormality occurs:

[0057] If an abnormality occurs, the vehicle access unit management platform initiates a master-slave switch, sets the current master device status to the backup device, and sets the backup device recorded by the vehicle access unit management platform to the master device; and notifies the vehicle access unit TAU ​​device of the updated master device information through the master-slave status synchronization message;

[0058] If there is no abnormality, the current active device information is notified to the vehicle access unit TAU ​​device through the active-standby status synchronization message.

[0059] In step S2, if the period during which the vehicle access unit TAU ​​device fails to report a heartbeat message exceeds a user-defined threshold, or the delay is greater than a preset threshold, it is considered that the current active device is abnormal.

[0060] The vehicle access unit status detection and high reliability assurance system is used to implement the above method, including a vehicle access unit management platform and a vehicle access unit TAU ​​device;

[0061] The vehicle access unit management platform is deployed in the ground control system and is responsible for detecting the equipment status and setting the primary and standby status of the equipment;

[0062] The subway train's onboard access unit (TAU) equipment is deployed at the front and rear of the train. The train's main and backup service systems are connected to the TAU equipment deployed at the front and rear of the train respectively.

[0063] The on-board access unit (TAU) device communicates with the on-board access unit management platform deployed in the ground control system via a wireless cellular network to transmit train service data to the ground;

[0064] Moreover, the on-board access unit (TAU) devices deployed at the front and rear of the train are respectively deployed in two different Ethernet networks, and do not have direct communication links, making direct communication impossible.

[0065] The vehicle access unit's status detection and high-reliability computing equipment includes:

[0066] One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for performing any of the above methods.

[0067] The computer-readable storage medium stores one or more programs, wherein the one or more programs include instructions, which, when executed by the status detection and high-reliability assurance computing device of the on-board access unit, enable the status detection and high-reliability assurance computing device of the on-board access unit to perform any of the above methods.

[0068] The existing active-standby switching solution based on direct communication detection between devices is limited in its application scenarios. In a network environment without a direct communication link, active-standby switching cannot be implemented.

[0069] Compared with the existing direct communication master-slave switching solution for equipment, this vehicle-mounted access unit status detection and high-reliability assurance method stores the vehicle-mounted access unit TAU ​​equipment information in the vehicle-mounted access unit management platform of the ground control system. The device master-slave status is remotely controlled by the vehicle-mounted access unit management platform; the vehicle-mounted access unit management platform detects device status and network latency, realizing intelligent master-slave switching control in specific business network scenarios.

[0070] The embodiment described above is only one specific implementation of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the status of a vehicle-mounted access unit and ensuring high reliability, characterized by: Deploy a vehicle access unit management platform in the ground control system to detect the equipment status and set the primary and backup status of the equipment; The subway train's onboard access unit (TAU) equipment is deployed at the front and rear of the subway train, and the train's main and backup service systems are connected to the onboard access unit (TAU) equipment deployed at the front and rear of the train respectively. The on-board access unit (TAU) device communicates with the on-board access unit management platform deployed in the ground control system via a wireless cellular network, transmitting train service data to the ground. Furthermore, the TAU devices deployed at the front and rear of the train are deployed in two different Ethernet networks, lacking direct communication links and unable to communicate directly. The following steps are involved: Step S1: Vehicle access unit TAU ​​equipment The vehicle access unit TAU ​​device periodically sends heartbeat messages to the vehicle access unit management platform to report device information and notify the vehicle access unit management platform of its own status; and updates its own active and standby status according to the active and standby status synchronization message sent by the vehicle access unit management platform; Step S2: Vehicle access unit management platform The on-board access unit management platform receives the heartbeat message reported by the on-board access unit TAU ​​device, and sets and switches the main device by detecting the heartbeat message and network delay. It also notifies the on-board access unit TAU ​​devices deployed at the front and rear of the train of the main device information through the main and backup status synchronization message to realize the setting and switching of the main device.

2. The method for status detection and high reliability assurance of a vehicle-mounted access unit according to claim 1, characterized in that: In the step S1, the vehicle access unit TAU ​​device sets its own master / slave state according to the master / slave state synchronization message sent by the vehicle access unit management platform; If the device information in the master-slave status synchronization message matches itself, the corresponding vehicle access unit TAU ​​device is set as the master device; if not, it is set as the backup device.

3. The method for status detection and high reliability assurance of a vehicle-mounted access unit according to claim 1, characterized in that: In step S2, the vehicle access unit management platform determines whether the primary device has been set: If the primary device is not set, set the device currently reporting the heartbeat message as the primary device, record the corresponding device information on the vehicle access unit management platform, and set the corresponding device status to primary; send a primary-backup status synchronization message to notify the vehicle access unit TAU ​​device to be set as the primary device; If the primary device is currently set, the newly reported device information will be recorded and the corresponding device status will be set to standby; The current active device information is notified to the vehicle access unit TAU ​​device through the active-standby status synchronization message.

4. The method for detecting the status of a vehicle-mounted access unit and ensuring high reliability according to claim 1 or 3, characterized in that: In step S2, the vehicle access unit management platform periodically detects the heartbeat message reporting status of the primary device and the delay from the vehicle access unit management platform to the vehicle access unit TAU ​​device to determine whether an abnormality occurs: If an abnormality occurs, the vehicle access unit management platform initiates a master-slave switch, sets the current master device status to the backup device, and sets the backup device recorded by the vehicle access unit management platform to the master device; and notifies the vehicle access unit TAU ​​device of the updated master device information through the master-slave status synchronization message; If there is no abnormality, the current active device information is notified to the vehicle access unit TAU ​​device through the active-standby status synchronization message.

5. The method for status detection and high reliability assurance of a vehicle-mounted access unit according to claim 4, characterized in that: In step S2, if the period during which the vehicle access unit TAU ​​device fails to report a heartbeat message exceeds a user-defined threshold, or the delay is greater than a preset threshold, it is considered that the current active device is abnormal.

6. A status detection and high reliability assurance system for a vehicle-mounted access unit, characterized by: Used to implement the method according to any one of claims 1 to 5, comprising a vehicle access unit management platform and a vehicle access unit TAU ​​device; The vehicle access unit management platform is deployed in the ground control system and is responsible for detecting the equipment status and setting the primary and standby status of the equipment; The subway train's onboard access unit (TAU) equipment is deployed at the front and rear of the train. The train's main and backup service systems are connected to the TAU equipment deployed at the front and rear of the train respectively. The on-board access unit (TAU) device communicates with the on-board access unit management platform deployed in the ground control system via a wireless cellular network to transmit train service data to the ground; Moreover, the on-board access unit (TAU) devices deployed at the front and rear of the train are respectively deployed in two different Ethernet networks, and do not have direct communication links, making direct communication impossible.

7. A status detection and high-reliability assurance computing device for a vehicle-mounted access unit, characterized by: include: One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for executing the method according to any one of claims 1 to 6.

8. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include instructions, which, when executed by the status detection and high-reliability assurance computing device of the vehicle access unit, enable the status detection and high-reliability assurance computing device of the vehicle access unit to perform the method according to any one of claims 1 to 6.

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