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Method for controlling data consistency in communication based train control (CBTC) system

A consistency and data technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve data security control and other issues, and achieve the effect of avoiding potential safety hazards

Active Publication Date: 2011-09-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the shortcomings of the prior art, in order to solve the problem of data security control in the existing CBTC system, the present invention proposes a method for data consistency control in the CBTC system, which is used to realize the security management of data

Method used

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  • Method for controlling data consistency in communication based train control (CBTC) system
  • Method for controlling data consistency in communication based train control (CBTC) system
  • Method for controlling data consistency in communication based train control (CBTC) system

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Based on the above version number design scheme, other subsystems in CBTC can periodically apply for the version number information of various databases from DSU, and judge whether the data lines or other configuration data have changed by comparing the version numbers. Only when the version number changes Only when the application is made to the DSU to download the corresponding database, the quantity and frequency of data exchange between different subsystems are reduced, the network bandwidth is saved, and the possibility of data destruction is minimized. The design concept of this solution is "DSU centralized storage, DSU centralized management".

[0073] The following takes the VOBC and ZC subsystems in CBTC as an example to describe this process in detail, such as figure 2 shown.

[0074] (1) DSU, ZC and VOBC are initialized and self-checked after power-on;

[0075] (2) After the DSU self-test is successful, read the data stored in the hard disk into the memory...

Embodiment 2

[0089] In order to reduce the impact on the entire system when the DSU fails, the figure 2 The workflow shown has been modified, and a scheme of "centralized storage in DSU and decentralized management in ZC" is proposed. The specific process is as follows image 3 Shown:

[0090] (1) DSU, ZC and VOBC are initialized and self-checked after power-on;

[0091] (2) After the DSU self-test is successful, read the data stored in the hard disk into the memory, and verify the integrity of the data;

[0092](3) After the VOBC self-test succeeds, in order to run in the CBTC system, it needs to periodically send a request to ZC and wait for MA;

[0093] (4) After the ZC self-test is successful, it needs to request the version numbers of various databases from the DSU, and the ZC will not control the train until it is confirmed that it is consistent with the data version number of the DSU;

[0094] (5) DSU sends the corresponding version number to ZC after receiving the data version...

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Abstract

The invention relates to the technical field of embedded systems and provides a method for controlling the data consistency in a communication based train control (CBTC) system. By the method, safety management of data is realized; and all vehicle on board controllers (VOBC), zone controllers (ZC) and other sub systems can acquire new data from a database storage unit (DSU) immediately during running of the whole CBTC system, and the mutually used data are consistent totally. In the method, by adoption of a management strategy based on a database version number, the version number can be associated with a data content, and the probability of error identification can be reduced; meanwhile, the quantity of data interacted among different sub systems is reduced to the maximum extent; therefore, the efficiency and the safety are improved.

Description

technical field [0001] The invention relates to the technical field of embedded systems, in particular to a method for data consistency control in a CBTC system. Background technique [0002] In large and medium-sized cities with increasingly serious traffic problems, rail transit has received more and more attention due to its compliance with low-carbon and energy-saving trends. As the core control system of rail transit, Communication Based Train Control (CBTC) has been increasingly used and accepted due to its significant advantages in improving the transportation efficiency and safety of urban rail transit. promote. [0003] The Database Storage Unit (DSU) is responsible for managing the raw data of the entire track line and the configuration files of the entire system, and is an important security device in the CBTC system. The on-board subsystem (Vehicle On Board Controller, VOBC) in the CBTC system needs to use the sensor to obtain distance measurement information b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06F17/30
Inventor 王悉唐涛郜春海刘波
Owner BEIJING JIAOTONG UNIV
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