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保证服务质量(QoS)的通信是当今网络发展的必然趋势之一。动态路由算法可根据网络拓扑和负载情况实时为业务流选择路径，其合理性和有效性对于网络资源的优化使用及网络运行性能起着重要作用。文章阐述了QoS动态路由算法的研究内容：链路量度的选择、选路原则、改进Bellman-Ford算法和Dijkstra算法以及算法的触发，并总结了QoS路由算法目前存在的几个问题。
To ensure quality of service (QoS) communication is one of the inevitable trends in today’s network development. According to the network topology and load, the dynamic routing algorithm can select the path for the service flow in real time. Its rationality and effectiveness play an important role in optimizing the use of network resources and network operation performance. This paper describes the research content of QoS dynamic routing algorithm: the choice of link metric, routing principle, improved Bellman-Ford algorithm and Dijkstra algorithm and algorithm triggering, and summarizes some existing problems of QoS routing algorithm.