【摘要】 依据欧洲标准EN50159设计一种用于CBTC各子系统间通信的安全通信协议。该协议面向连接,采用序列号、超时检测、安全编码等多种安全措施,在通信异常发生时,具备故障导向安全能力。借助OPNET仿真环境对协议的实时性进行分析。仿真结果表明,通过在仿真中注入链路故障协议验证故障导向安全功能,该协议能够满足CBTC系统的应用需求。更多还原

【Abstract】 This paper designs a safety-critical communication protocol according to the European standard EN50159 for the communication among the subsystems of Communication Based Train Control(CBTC).The protocol is connection-oriented and adopts many safety measures such as sequence number,timeout,safety code and so on.When transmission errors occur,the protocol makes the system fall into the safe state.In the end,the real-time response of the protocol is analyzed with the help of OPNET.Simulation results show that the real-time response of the protocol can well satisfy the requirements of CBTC application.Through the injection of a link failure during the simulation,the fail-safe function of the protocol is verified.So the safety-critical communication protocol designed is good enough to be applied in CBTC.更多还原