Safety And Credibility Research For Wireless-Communication Based Train Automatic Control

The CBTC system is the present urban track traffic signal system's one kind of new application plan, its security and reliable direct relation train movement quality. The present signaling system uses is fixed unenlightened perhaps the accurate movable block, along with the urbanized development, the operation request is getting higher and higher, therefore the CBTC appearance, displays the train automatic control system's ability fully. But the CBTC system's security and the reliability are one very important and the actual topic. Because traditional train automatic system's intelligence transmission mainly based on special-purpose wired network, reliability and security in private network design basic solution; Along with the wireless networking's development, has introduced CBTC based on the wireless communication train automatic control system, proposed the security to commercial WLAN and the reliable request.This article proposed that present domestic orbital transportation profession has some only regarding the CBTC system's secure reliability based on the universal network standard and the standard (for example the IEEE profession standard and in view of CBTC IEEE 1474 guidance white paper), in the network security has used some mature encryption algorithm (for example DES, 3DES), but these procedures and the standard often exist have the security loophole, must therefore carry on the corresponding analysis and the improvement to them.This article to the correspondence domain commonly used standard, the profession standard and the algorithm in fact carries on the analysis, as well as in communications system's network standard, IEEE 802.3 standards and IEEE International organization standard key cut agreement and so on analysis; Has carried on the analysis in view of the wireless communication system's profession standard and the algorithm which saves to the wireless system password proposed the compatible demand; Has referred to the security aspect correlation data, had discovered the two accommodating appear possibly some questions, and have carried on the analysis to the order of complexity, simultaneously aimed at the discovery the question to propose the enhancement solution and the agreement, have proven the CBTC system application feasibility as well as the superiority.This article significance lies, not only proposed a brand-new intelligent track transportation system, but also had proven in the communications system introduction rigorous signaling system, will have provided a recent development direction and the performance improvement way for signaling system's development.