基于多优先级探测的准入控制实现端到端服务质量保证的研究

本文针对传统的基于单优先级探测的准入控制存在的缺陷,提出了一种可扩展性好的基于多优先级探测的准入控制方法.它可以根据流的不同服务质量需求,为单个流提供多种不同优先级别的端到端的服务质量保证.本文详细论述了它的原理与实现.为了降低探测流冲突对准入控制的性能的影响,本文提出了在路由器中设定可变的竞争探测流数目上限的方法来降低探测流冲突,既提高了资源利用率又保证了较高的准入成功率.最后,本文通过NS模拟验证了多优先级准入控制的优越性.

Research on Realizing End-to-End QoS by the Admission Control Based on Multiple-Prior Probing

A scalable admission-control method based on multiple-prior probing,aiming at the limitation of the traditional one-prior probing admission-control,is proposed to provide multiple-prior end-to-end QoS for individual flows according to their different QoS requirements and principle.The implementation of this method is explained in detail.To diminish the influence of probing collision on the performance of the proposed admission-control,a method of setting the alterable maximal number of the competing probing flows in the router is put forward so as to increase the resource utilization and ensure a high access success ratio.At last,the simulation in NS validates the advantage of the proposed admission-control method.