【摘要】 介绍了高速信息网中两种确保服务质量(QoS)的网络结构:集成服务(Intserv)及区分服务(Diffserv).分析了EF业务的特点及EF流产生突发和延迟的原因.提出了EF业务QoS保证模型.在此模型中,将区分服务域分成子域,在子域的边缘节点对EF流使用基于输入链路的调度控制EFWFQ.使用ns2仿真软件对模型的性能进行了分析.更多还原

【Abstract】 Introduced the architectures for QoS guarantee in the network, Intserv and Diffserv.Analyzed the characteristic of EF flow and the reason for EF flow burst and delay. Provided a model of EF flow for QoS guarantee. In the model, DS domain is divided into sub-domains. At the edge node of the sub-domain, a control method basing on WFQ for per-ingress EF flow named EFWFQ is used. The performance of the model is analyzed by simulation with simulation software ns-2.更多还原