TCSN业务流量及传输特性分析  

Research on flow and transport characteristics of TCSN

作　　者：侯世武 谭献海[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都611700

出　　处：《微型机与应用》2017年第17期62-64,67,共4页Microcomputer & Its Applications

基　　金：国家科技支撑计划(2015BAG14B01)

摘　　要：TCSN(Train Control and Service Network)的目标是实现列车控制与服务信息的一体化传输。流量的自相似特性对网络性能具有一定的影响,文章对列车控制信息和旅客服务业务的流量特性进行了分析,发现列车控制类流量不具有自相似特性,旅客服务类流量具有较强的自相似特性,列车控制业务流量和旅客服务业务流量聚合之后,聚合流量具有自相似特性。通过OPNET仿真,发现在列车传输网中加入旅客服务流量后,由于旅客服务流量具有较强的自相似特性,造成网络时延大幅增加。只有当网络服务速率大幅提高后,才可以使网络的时延与没有加入旅客服务之前的时延相当。该研究结果对TCSN的建设具有一定的参考意义。The goal of the TCSN(Train Control and Service Network) is to realize the integrated transmission of train control and passenger service information. The self-similarity characteristic of network flow has certain influence on the network performance. In this paper,the flow characteristics of the train control information and passenger service information are analyzed,and the result shows that the train control flow has no self-similar characteristic,and passenger service flow has strong self-similarity characteristic,when the train control flow and passenger service flow are aggregated,the aggregated traffic has strong self-similar characteristics. Through OPNET simulation,it is found that after the passenger service is added to the train transmission network,the network delay increased because of the passenger service flow has high selfsimilarity. Only the network service rate increased significantly can make the network delay as before input the passenger service into the network. The analysis of this paper has certain reference value to the construction of TCSN.

关 键 词：列车控制与服务网络 流量特性 自相似 时延特性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]