列车控制与服务网络流量监管研究

摘要

列车控制与服务网络(TCSN)不同于传统的列车通信网络,TCSN在保证列车控制业务传输的同时,充分考虑应用越来越广泛的旅客服务业务,实现列车控制与旅客服务业务流量一体化传输.TCSN采用区分服务模式,针对TCSN网络实际流量到达速率与SLA规定的流量速率可能不相符造成的流量突发,提出了一种多级令牌桶流量监管方案,通过两级令牌分配监管AF业务流量,并对监管后的流量报文进行着色和入队管理,实现列车控制与服务业务流量的动态监管及网络资源的合理分配.%The train control and service network (TCSN) is different from the traditional train communication network. Taking full account of the more widely used passenger service business, TCSN ensures the transmission of train control business, implements integrated transmission of train control and service traffic. TCSN uses a differentiated service model, the network can generate traffic bursting because the actual traffic arrival rate of the TCSN may not be correspond to the traffic rate specified by the Service Level Agreement(SLA). This article presented a new multi-level token bucket traffic monitoring scheme, which monitored Assured Forward(AF) business traffic by two-level allocation, tinted traffic packets, tinted traffic packets and managed traffic queue after traffic monitoring, implemented the dynamic monitoring of TCSN traffic and the reasonable distribution of network resources.