According to the special requirements of train control and passenger service business integration transmission in the train control and service network(TCSN), in view of data traffic scheduling in TCSN, this article comprehensively considered traffic characteristics, transfer demand of the various business traffic and utilization rate of the current network, designed a two-level scheduling policy DWDRR/PRI. The thought and the details of the two-level scheduling algorithm were expounded, the principle about how to solve the problem about critical business priority transmission and non-critical business fairness transmission according to the rules was introduced. Finally, the feasibility and correctness of the two-level scheduling algorithm was proved by simulation analysis.%文章根据列车控制与服务网络(TCSN)的列车控制与旅客服务业务一体化传输特殊需求,针对TCSN中数据流量调度,综合考虑TCSN中各种业务流量不同的流量特性、传输服务质量需求和网络当前利用率等因素,设计了一种两级调度方案DWDRR/PRI.重点阐述了两级调度的思想和调度算法的相关细节,以及调度策略,实现TCSN中关键业务优先传输和非关键业务按规则公平传输,并通过仿真分析证明了两级调度算法的可行性和正确性.
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