Train-ground redundant communication system and method adopting double drift IP addresses

Abstract

The invention belongs to the technical field of railway communication, and provides a train-ground redundancy communication system and method adopting double drift IP addresses, and the system comprises a vehicle-mounted ATP module which comprises a vehicle-mounted wireless transmission unit, a first communication interface and a second communication interface; the ground RBC module comprises an RBC host, a first interface unit system and a second interface unit system; the first interface unit system and the second interface unit system are in a main-standby relation; in the first system or the second system of the interface units, the two interface units are in a main-standby system relationship, and the main system interface unit communicates with the first communication interface or the second communication interface by using a drift IP address; the main system interface unit and the standby system interface unit are switched by setting a heartbeat detection mechanism; and the RBC host communicates with the first system and the second system of the interface unit through the internal Ethernet. According to the invention, the dual-system interface units are adopted to form the main-standby system relationship, and in each system of interface units, the two interface units form the main-standby system relationship, so that communication interruption between the ATP and the RBC caused by hardware faults of the interface units is effectively avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway communications, and in particular relates to a train-to-ground redundant communication system and method using dual drift IP addresses. Background Art

[0002] Currently, in the existing technology, the wireless connection between the vehicle-mounted ATP and the ground RBC is established through a single channel. When network fluctuations cause this channel to be disconnected, it is easy to cause a wireless timeout failure.

[0003] like Figure 2 As shown, in the existing single-channel connection solution, ATP can use MT1 (IP_B1) or MT2 (IP_B2) to establish a wireless connection with RBC (IP_A). There are two interface units on the RBC side: interface unit series 1 and interface unit series 2, and the two interface units are in a master-slave relationship with each other; there are three IP addresses on the RBC side, namely: the physical IP address IP_A1 configured for interface unit series 1, the physical IP address IP_A2 configured for interface unit series 2, and the virtual IP address IP_A configured for the master interface unit; the virtual IP address is used for network communication with ATP.

[0004] The two interface units continuously ping the gateway IP address. When an interface unit detects a communication problem with the gateway, if the current interface unit is the active system and the standby interface unit is communicating normally with the gateway, the interface unit automatically switches systems. The standby system becomes the active system and the virtual IP address IP_A is assigned to the new active interface unit.

[0005] A heartbeat detection mechanism is set up between the main system interface unit and the backup system interface unit. When the backup system interface unit detects that the heartbeat of the main system interface unit has timed out, it determines that the main system interface unit has failed. The backup system interface unit is promoted to the main system and configured with a virtual IP address IP_A for network communication with ATP.

[0006] A single-channel connection is used between ATP and RBC. ATP and RBC only establish one vehicle-to-ground communication channel, and there is no redundant channel. During the upgrade of the backup system to the main system, the connection between ATP and the RBC host will be disconnected and then reconnected. This process takes a long time and is prone to cause wireless timeout failures.

[0007] Therefore, when a single point failure occurs in any device in the vehicle-to-ground communication channel, it will cause vehicle-to-ground communication failure and poor system reliability. Summary of the Invention

[0008] To solve the above problems, the present invention provides a vehicle-ground redundant communication system and method using dual drift IP addresses.

[0009] The present invention provides a vehicle-to-ground redundant communication system using dual drift IP addresses, the system comprising: On-board ATP module, including an on-board wireless transmission unit, communication interface 1 and communication interface 2; Ground RBC module, including RBC host, interface unit series 1 and interface unit series 2; The communication interface 1 and the communication interface 2 establish wireless connections with the interface unit 1 and the interface unit 2 respectively; The interface unit 1 and the interface unit 2 are in a master-slave relationship, and are each assigned a drift IP address; The interface unit 1 includes interface unit 1 and interface unit 2; the interface unit 2 includes interface unit 3 and interface unit 4, and each of interface unit 1, interface unit 2, interface unit 3 and interface unit 4 is assigned a physical IP address; In the interface unit 1 system or the interface unit 2 system, the interface unit 1 and the interface unit 2, or the interface unit 3 and the interface unit 4, are in a master-slave relationship. The master interface unit communicates with the communication interface 1 or the communication interface 2 using a drift IP address. A heartbeat detection mechanism is set up to switch between the master interface unit and the backup interface unit. The RBC host communicates with the interface unit series 1 and the interface unit series 2 via internal Ethernet.

[0010] Furthermore, the vehicle-mounted wireless transmission unit sends and receives data through the communication interface 1 and the communication interface 2, and performs redundancy processing; The ground RBC module sends and receives data through interface unit series 1 and interface unit series 2, and performs redundant processing.

[0011] Furthermore, the communication interface 1 and the communication interface 2 are each assigned a physical IP address.

[0012] Furthermore, the interface unit 1 and the interface unit 2 communicate with each other to synchronize status information, synchronize interaction information with the outside world, and monitor each other's status.

[0013] Furthermore, the heartbeat detection mechanism is used for the standby system interface unit to detect the heartbeat timeout condition of the main system interface unit.

[0014] Furthermore, the master system interface unit and the backup system interface unit are disconnected by setting a heartbeat detection mechanism, which specifically includes: In the interface unit system 1 or the interface unit system 2, after the backup interface unit detects that the heartbeat of the main interface unit has timed out through the heartbeat detection mechanism, the backup interface unit is promoted to the main interface unit and configured with a drift IP address to establish a wireless connection with the communication interface 1 or the communication interface 2 to restore redundant communication.

[0015] Furthermore, in the interface unit system 1 or the interface unit system 2, when the main system interface unit cannot ping the gateway, the backup system interface unit is promoted to the main system interface unit and configured with a drift IP address to establish a wireless connection with the communication interface 1 or the communication interface 2 to restore redundant communication.

[0016] The present invention also provides a vehicle-to-ground redundant communication method using dual drift IP addresses, the method comprising: When the on-board wireless transmission unit in the on-board ATP module sends data, it copies one copy of the data into two copies and sends them through communication interface 1 and communication interface 2. When receiving data, it receives two copies of the data through communication interface 1 and communication interface 2, and only retains one copy of the data after redundancy processing. When the ground RBC module sends data, it copies one copy of the data into two copies and sends them through the interface unit series 1 and interface unit series 2. When receiving data, it receives two copies of the data through the interface unit series 1 and interface unit series 2, and only retains one copy after redundancy processing of the data. The interface unit 1 and the interface unit 2 communicate with each other to synchronize status information, synchronize interaction information with the outside world, and monitor each other's status; When the interface unit system 1 fails, the connection between the communication interface 2 and the interface unit system 2 can maintain normal communication between the onboard ATP module and the ground RBC module; When the interface unit system 2 fails, the connection between the communication interface 1 and the interface unit system 1 can maintain normal communication between the onboard ATP module and the ground RBC module; In the interface unit 1 system or the interface unit 2 system, the interface unit 1 and the interface unit 2, or the interface unit 3 and the interface unit 4 are in a master-slave relationship. The master interface unit uses a drifting IP address to communicate with the communication interface 1 or the communication interface 2. When the master interface unit fails to ping the gateway or the master interface unit heartbeat times out, the backup interface unit becomes the master interface unit and configures a drifting IP address to establish a wireless connection and restore redundancy. The RBC host communicates with the interface unit series 1 and the interface unit series 2 via internal Ethernet.

[0017] Compared with the prior art, the present invention has the following advantages: The present invention optimizes the wireless connection mode between the vehicle and the ground to establish a redundant dual-channel connection, thereby reducing the probability of wireless timeout; dual-system interface units are used to form a master-slave relationship, and in each system interface unit, the two interface units further form a master-slave relationship, effectively avoiding the interruption of ATP and RBC communication due to hardware failure of the interface unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 Schematic diagram of the structure of a vehicle-to-ground redundant communication system using dual drift IP addresses according to the present invention; Figure 2 Schematic diagram of a single-channel connection structure of a vehicle-to-ground communication system in the prior art; Figure 3 The figure is a flow chart of a vehicle-ground redundant communication method using dual drift IP addresses according to the present invention. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] In one embodiment of the present invention, a vehicle-to-ground redundant communication system using dual drift IP addresses is provided. Figure 1 As shown, the system includes: The vehicle-mounted ATP module includes a vehicle-mounted wireless transmission unit, a communication interface MT1 and a communication interface MT2; wherein the communication interface MT1 and the communication interface MT2 are each assigned a physical IP address IP_B1 and IP_B2; Ground RBC module, including RBC host, interface unit series 1 and interface unit series 2; The communication interface 1 and the communication interface 2 establish wireless connections with the interface unit 1 and the interface unit 2 respectively; The vehicle-mounted wireless transmission unit sends and receives data through the communication interface MT1 and the communication interface MT2, and performs redundancy processing; The ground RBC module sends and receives data through the interface unit series 1 and interface unit series 2, and performs redundant processing; The interface unit 1 and the interface unit 2 are in a master-slave relationship and are each assigned a drift IP address IP_A1 and IP_A2; Inter-system communication is carried out between the interface unit 1 and the interface unit 2 to synchronize status information, synchronize interaction information with the outside world, and monitor each other's status; When the interface unit system 1 fails, the connection between the communication interface MT2 and the interface unit system 2 can maintain normal communication between the onboard ATP module and the ground RBC module; When the interface unit system 2 fails, the connection between the communication interface MT1 and the interface unit system 1 can maintain normal communication between the onboard ATP module and the ground RBC module; The interface unit 1 includes interface unit 1 and interface unit 2; the interface unit 2 includes interface unit 3 and interface unit 4; wherein, interface unit 1, interface unit 2, interface unit 3, and interface unit 4 are each assigned a physical IP address IP_C1, IP_C2, IP_C3, and IP_C4; In the interface unit 1 system or the interface unit 2 system, the interface unit 1 and the interface unit 2, or the interface unit 3 and the interface unit 4, are in a master-slave relationship. The master interface unit uses a drifting IP address to communicate with the communication interface 1 MT1 or the communication interface 2 MT2. The main system interface unit and the backup system interface unit are disconnected by setting a heartbeat detection mechanism, wherein the heartbeat detection mechanism is used by the backup system interface unit to detect the heartbeat timeout of the main system interface unit; When the primary interface unit fails to ping the gateway or the primary interface unit's heartbeat times out, the backup interface unit becomes the primary interface unit and configures a drifting IP address to establish a wireless connection with communication interface 1 MT1 or communication interface 2 MT2 to restore redundant communication. The RBC host communicates with the interface unit series 1 and the interface unit series 2 via internal Ethernet.

[0022] The embodiment of the present invention also provides a vehicle-ground redundant communication method using dual drift IP addresses, such as Figure 2 As shown, the method includes: When the on-board wireless transmission unit in the on-board ATP module sends data, it copies one copy of the data into two copies and sends them through communication interface 1 and communication interface 2. When receiving data, it receives two copies of the data through communication interface 1 and communication interface 2, and only retains one copy of the data after redundancy processing. When the ground RBC module sends data, it copies one copy of the data into two copies and sends them through the interface unit series 1 and interface unit series 2. When receiving data, it receives two copies of the data through the interface unit series 1 and interface unit series 2, and only retains one copy after redundancy processing of the data. The interface unit 1 and the interface unit 2 communicate with each other to synchronize status information, synchronize interaction information with the outside world, and monitor each other's status; When the interface unit system 1 fails, the connection between the communication interface MT2 and the interface unit system 2 can maintain normal communication between the onboard ATP module and the ground RBC module; When the interface unit system 2 fails, the connection between the communication interface MT1 and the interface unit system 1 can maintain normal communication between the onboard ATP module and the ground RBC module; In the interface unit 1 system or the interface unit 2 system, the interface unit 1 and the interface unit 2, or the interface unit 3 and the interface unit 4, are in a master-slave relationship. The master interface unit uses a drifting IP address to communicate with the communication interface 1 MT1 or the communication interface 2 MT2. When the master interface unit fails to ping the gateway or the master interface unit's heartbeat times out, the backup interface unit becomes the master interface unit and configures a drifting IP address to establish a wireless connection and restore redundant communication. The RBC host communicates with the interface unit series 1 and the interface unit series 2 via internal Ethernet.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-to-ground redundant communication system using dual drift IP addresses, characterized in that: The system comprises: The vehicle-mounted ATP module includes a vehicle-mounted wireless transmission unit, a communication interface 1 and a communication interface 2; Ground RBC module, including RBC host, interface unit series 1 and interface unit series 2; The communication interface 1 and the communication interface 2 respectively establish wireless connections with the interface unit series 1 and the interface unit series 2; The interface unit system 1 and the interface unit system 2 are in a master-slave relationship, and are each assigned a drift IP address; The interface unit 1 includes interface unit 1 and interface unit 2; the interface unit 2 includes interface unit 3 and interface unit 4; interface unit 1, interface unit 2, interface unit 3, and interface unit 4 are each assigned a physical IP address; In the interface unit 1 system or the interface unit 2 system, the interface unit 1 and the interface unit 2, or the interface unit 3 and the interface unit 4 are in a master-slave relationship, and the master interface unit uses a drift IP address to communicate with the communication interface 1 or the communication interface 2; the master interface unit and the backup interface unit are disconnected by setting a heartbeat detection mechanism; The RBC host communicates with the interface unit series 1 and the interface unit series 2 via internal Ethernet.

2. The system according to claim 1, characterized in that The vehicle-mounted wireless transmission unit sends and receives data through the communication interface 1 and the communication interface 2, and performs redundancy processing; The ground RBC module sends and receives data through interface unit series 1 and interface unit series 2, and performs redundant processing.

3. The system according to claim 1, characterized in that The communication interface 1 and the communication interface 2 are each assigned a physical IP address.

4. The system according to claim 1, characterized in that The interface unit 1 and the interface unit 2 communicate with each other to synchronize status information, synchronize interaction information with the outside world, and monitor each other's status.

5. The system according to claim 1, characterized in that The heartbeat detection mechanism is used by the standby system interface unit to detect the heartbeat timeout condition of the main system interface unit.

6. The system according to claim 1, characterized in that The main system interface unit and the backup system interface unit are disconnected by setting a heartbeat detection mechanism, which specifically includes: In the interface unit system 1 or the interface unit system 2, after the backup system interface unit detects the heartbeat timeout of the main system interface unit through the heartbeat detection mechanism, the backup system interface unit is promoted to the main system interface unit, and the drift IP address is configured to establish a wireless connection with the communication interface 1 or the communication interface 2 to restore redundant communication.

7. The system according to claim 1, characterized in that In the interface unit system 1 or the interface unit system 2, when the main system interface unit fails to ping the gateway, the standby system interface unit is promoted to the main system interface unit, and is configured with a drift IP address to establish a wireless connection with the communication interface 1 or the communication interface 2 to restore redundant communication.

8. A vehicle-ground redundant communication method using dual drift IP addresses, characterized in that: The method comprises: When the on-board wireless transmission unit in the on-board ATP module sends data, it copies one copy of the data into two copies and sends them through communication interface 1 and communication interface 2; when receiving data, it receives two copies of the data through communication interface 1 and communication interface 2, and only retains one copy of the data after redundancy processing; When the ground RBC module sends data, it copies one copy of the data into two copies, and sends them through the interface unit series 1 and the interface unit series 2; when receiving data, it receives two copies of the data through the interface unit series 1 and the interface unit series 2, and only retains one copy of the data after redundancy processing; The interface unit 1 and the interface unit 2 communicate with each other to synchronize status information, synchronize interaction information with the outside world, and monitor each other's status; When the interface unit system 1 fails, the connection between the communication interface 2 and the interface unit system 2 can maintain the normal communication between the vehicle-mounted ATP module and the ground RBC module; When the interface unit system 2 fails, the connection between the communication interface 1 and the interface unit system 1 can maintain the normal communication between the vehicle-mounted ATP module and the ground RBC module; In the interface unit 1 system or the interface unit 2 system, the interface unit 1 and the interface unit 2, or the interface unit 3 and the interface unit 4 are in a master-slave system relationship, and the master system interface unit uses a drift IP address to communicate with the communication interface 1 or the communication interface 2; When the main system interface unit cannot ping the gateway or the heartbeat of the main system interface unit times out, the standby system interface unit is promoted to the main system interface unit, and a drift IP address is configured to establish a wireless connection to restore redundant communication; The RBC host communicates with the interface unit series 1 and the interface unit series 2 via internal Ethernet.

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