基于虚剩余带宽的多个路由表的多类别QoS路由

Multi-class QoS routing with multiple routing tables based on virtual residual bandwidth

现在以及将来的网络通需要支持有QoS请求的应用,而这对于大型复杂的网络结构是一个挑战,一些研究已经解决了QoS路由的一部分问题。本文在虚剩余带宽的多个路由表的基础上提出了一种新的QoS路由,允许在多个业务类之间动态地共享链路资源。路由算法尽可能为QoS业务选择best-effort业务轻载的链路,从而整体提升网络的性能。通过进一步的仿真,可以看出在链路负载不均衡的时候,QoS业务的丢包率以及best-effort业务的吞吐量都有很大的改善。

Future communications networks are expected to support application with quality of service （QoS） requirements. Supporting QoS poses major challenge due to the large size and complex structure of networks. Several studies have addressed different aspects of networks. In this paper, we present a new approach of QoS routing based on the concept of virtual residual bandwidth and multiple routing tables which allows dynamic sharing of link resources among multiple traffic classes. This scheme selects light loaded links for QoS traffic, so it can improve the performance of the networks. From our extensive simulation results, we have found that both packet loss of QoS traffic and throughput of best-effort traffic can be improved by using our scheme.