摘要
区域控制中心(ZC)子系统内部安全协议是基于通信的列车控制(CBTC)系统成败的关键。设计了ZC内部安全协议组播发送方式及确认机制,提出了组播报文的安全确认流程。利用网络仿真工具(OPNET)建立安全协议多线程模型,根据ZC的实际运行情况对通信过程进行仿真,结果表明组播发送方式减小了近50%的通信延时。
Safety protocol of zone controller （ZC） subsys- tem in communication based train control （CBTC） system is a key factor that determines whether the system is suc- cessful or not. A multieast sending and acknowledging method for safety protocol inner ZC is designed, the safety acknowledgement process for multicast packet is developed. Then,OPNET Modeler 10.0 is used to build a multitask module of the safety protocol, and the communication process is simulated basing on the real running situation of ZC. The results show that the delay of the safety protocol based on multicast is about 50% lower than that of the pro- tocol not based on multicast.
出处
《城市轨道交通研究》
北大核心
2016年第8期48-51,97,共5页
Urban Mass Transit
基金
中国铁道科学研究院基金项目(2013YJ105)
关键词
轨道交通
基于通信的列车控制系统
安全协议
组播报文
rail transit
communication based train control（CBTC）
safety protocal
multicast packet
