CBTC系统数据通信子系统的可靠性分析

基于通信的列车控制系统（CBTC）通过连续的车地双向数据通信对列车进行控制和监督，而系统各个实体之间的信息交互是基于数据通信子系统（DCS）的。本文首先简单介绍CBTC系统的基本结构和相关安全水平，然后再介绍DCS的基本结构，并对DCS的可靠性进行详细而具体的分析，包括冗余性策略和故障一安全策略。

Analysis to Reliability of Data Communication System of CBTC System

Communicafion-Based Train Control （CBTC） system controls and supervises train by using continuous and bidirectional train to wayside data communication. The communication among the equipments of the system is based on the Data Communication System （DCS） .At first, the paper introduced the concept of CBTC and the safety level of each sub-system. Then, it presented the typical DCS structure in brief. At last, it analyzed the reliability of DCS in detail, including redundancy policy and fail-safe policy.