Control method and system for data access

A technology for data access and control methods, applied in the direction of input/output to record carriers, etc., can solve problems such as poor security, and achieve the effects of reducing workload, ensuring security, and improving security and continuity

Active Publication Date: 2013-03-20
CHINA ACADEMY OF RAILWAY SCI CORP LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this technical solution, the local database module is set on the client side of the system, and the data redundancy protection adopted by the core database has poor security.

Method used

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  • Control method and system for data access
  • Control method and system for data access
  • Control method and system for data access

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 It is a flow chart of a data access control method provided by an embodiment of the present invention, and the method includes:

[0024] Step 101, judging whether the database server works normally. According to the status information obtained from the database server and the data synchronization module, it is judged whether the database server is working normally; if the data server is working normally, then go to step 102; otherwise, go to step 103.

[0025] Step 102, perform data access to the database server according to the access instruction sent by the dispatching terminal module. Specifically: the dispatching terminal module is converted into a special encrypted information packet according to the dedicated security protocol for dispatching, and exchanges information with the application server through the TCP / IP protocol, and converts the access instructions from the dispatching terminal module into ADO data access, realizing the core dispatching comm...

Embodiment 2

[0030] In order to introduce the present invention more specifically, below in conjunction with appendix figure 2 The present invention is further described.

[0031] In the embodiment of the present invention, corresponding to the three working states of the database server of the dispatching centralized system: normal, fault and recovery, the system designs three working modes: normal operation mode, backup work mode and recovery work mode.

[0032] 1. Normal operation mode

[0033] On the one hand, in the normal operation mode, the database server works normally, and the following data needs to be accessed by the dispatching terminal module: adding, deleting, and modifying the number of running trains; Status records; train marshalling information; train storage information at stations; notes on section and station special information; editing of dispatching commands and records of sending and receiving status; all are accessed through the database server.

[0034] The a...

Embodiment 3

[0051] image 3 A schematic diagram of a data access system provided by an embodiment of the present invention, including: a scheduling terminal module 30, a database server 31, a standby database server 32, a data synchronization module 33 and an application server 34;

[0052] The scheduling terminal module 30 is configured to send an access instruction to the application server;

[0053] The database server 31 is configured to store operating data related to the access instructions sent by the dispatching terminal module;

[0054] The standby database server 32 is used for storing operation data related to the access instruction sent by the dispatching terminal module;

[0055] The application server 34 is used to judge whether the database server works normally; if the database server works normally, then perform data access to the database server according to the access instruction sent by the dispatching terminal module; if the database server When a failure occurs, da...

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PUM

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Abstract

The invention discloses a control method for data access. The control method for the data access is characterized in that whether a database server works normally is judged; if the database server works normally, the data access is conducted on the database server according to access orders sent by a dispatching terminal module; and if the database server does not work normally, whether a standby database server works normally is judged, and if the standby database server works normally, the data access is conducted on the standby database server according to access orders sent by the dispatching terminal module. By adoption of the control method, safe access of core data is realized, efficiency of dispatching command work is improved, and a rail traffic command system is provided with safety guarantee.

Description

technical field [0001] The invention relates to an urban rail transit system, in particular to a data access control method and system. Background technique [0002] CTC (Centralized Traffic Control System) in the urban rail transit system is mainly used to realize the supervision and control of train operation, and assist the train dispatchers to manage the trains on the whole line, which improves the efficiency of rail transit transportation and ensures the safety of operation played an extremely important role. [0003] In order to realize the supervision and control function of train operation safely and reliably, the CTC system must require the core train operation plan, actual, and dispatch command data used in dispatching and commanding to be safely stored and shared in real time. Once a fault occurs, the entire dispatching command system will be paralyzed , dispatchers will return from paperless electronic office to the original work mode of manually recording data ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 应志鹏袁志明许伟张涛宋鹏飞魏博
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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