Dependability analysis of the data communication system in train control system  

作　　者：XU TianHua TANG Tao GAO ChunHai CAI BaiGen 

机构地区：[1]State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China

出　　处：《Science China(Technological Sciences)》2009年第9期2605-2618,共14页中国科学（技术科学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 60634010, 60736047) ;the Doctoral Program Foundation of Institutions of High Education of China (Grant No. 20070004005)

摘　　要：Communication based train control (CBTC) system is based on mobile communication and overcomes fixed blocks in order to increase track utilization and train safety. The data communication system (DCS) between trains and wayside equipment is a crucial factor for the safe and efficient operation of CBTC system. The dependability under various transmission conditions needs to be modeled and evaluated. In this paper,a stochastic reward net (SRN) model for DCS based IEEE 802.11 standard was developed,which captures all relevant failure and failure recovery behavior system aspects in a concise way. We compared the reliability,availability for DCS with and without access point (AP) and antenna redundant configuration. We also quantitatively evaluated and compared the frame loss probability for three DCS configurations with different train velocities and train numbers in one radio cell. Fixed-point iteration was adopted to simplify the analysis. Numerical results showed the significant improvement of the reliability,availability and the frame loss probability index for the full redundant configuration.Communication based train control (CBTC) system is based on mobile communication and overcomes fixed blocks in order to increase track utilization and train safety. The data communication system (DCS) between trains and wayside equipment is a crucial factor for the safe and efficient operation of CBTC system. The dependability under various transmission conditions needs to be modeled and evaluated. In this paper, a stochastic reward net (SRN) model for DCS based IEEE 802.11 standard was developed, which captures all relevant failure and failure recovery behavior system aspects in a concise way. We compared the reliability, availability for DCS with and without access point (AP) and antenna redundant configuration. We also quantitatively evaluated and compared the frame loss probability for three DCS configurations with different train velocities and train numbers in one radio cell. Fixed-point iteration was adopted to simplify the analysis. Numerical results showed the significant improvement of the reliability, availability and the frame loss probability index for the full redundant configuration.

关 键 词：DEPENDABILITY ANALYSIS data COMMUNICATION system (DCS) stochastic REWARD net (SRN) COMMUNICATION based TRAIN control (CBTC) 

分 类 号：TP29-AC[自动化与计算机技术—检测技术与自动化装置]