随机Petri网理论在GSM-R通信系统中的仿真应用

列车和无线闭塞中心在多数情况下通信处于正常状态，但在实际通信过程中可能出现以下几种引发故障因素：传输数据出错、连接丢失、越区切换、端到端传输延时。应用仿真主要考虑高速列车在移动闭塞区间条件下GSM-R无线通信系统的可靠性，结合随机Petri网理论对GSM-R铁路无线通信系统故障恢复事件进行建模和分析，给出了随机Petri网表示的列车与无线闭塞中心通信的故障恢复模型，并采用TimeNET仿真工具对GSM-R通信系统的可靠性进行分析得出相应结论。

Application stochastic Petri nets theory on GSM-R system simulating

The communication link between train and RBC is always connected in normal operation mode.In that situation the elements of causing failures are as follows：Transmission errors,connection losses,handovers and end-to-end delay.In this case study,it is considered the reliability of communication needed for moving-block operation of high-speed train.The thesis＇ content models and analyzes GSM-R with stochastic Petri nets.The purpose gets the result of the fail situation of GSM-R.The thesis＇content models and analyzes failure and recovery model for GSM-R based on stochastic Petri nets.The model which is described by stochastic Petri nets is given for specifying and verify wireless communication failure and recovery model between trains and radio block center.The purpose is to get the result dependability of GSM-R wireless communication system and get the performance evaluation by using the tool of TimeNET.