区分服务模型有保证的转发研究

Study on Diffserv Assured Forward PDB

区分服务(Diffserv)是实现IP网络服务质量(IP-QoS)的重要途径之一。本文综合了有保证的转发(AF)和每域行为(PDB)的概念;利用一种性能模型对Diffserv进行了分析,得到了符合要求的RED算法和参数,并提出了一种充分利用带宽的标记/转发方案。应用本文的分析和模拟实验,实现了Diffsery的AF-PDB。

Differentiated service (Diffserv) is one of the most important methods to realize QoS on Internet. In this paper, we synthesis the idea of Assured Forward (AF) and Per-Domain Behaviour (PDB) to achieve assured service in Diffserv. Diffserv is analysised by a simple but useful performance model then RED algorithm and parameters that satisfied our request is obtained. We also give a marking/forwarding scheme, which could make better use of transmission bandwidth. With these analysis and simulation experiments, Diffserv AF-PDB is achieved.