区分服务网络基于测量的接纳控制方案的设计与应用

提出了一种分布式可扩展的接纳控制方案，其目的是为区分服务网络提供端到端服务质量（Quality of Services,QoS)保证，该方案主要由以下部分构成：（1）连接接纳控制协议，主要负责主机和网络节点以及网络节点和带宽代理之间的信息传送，实现对连接请求的串行操作；（2）位于网络核心节点的可用带宽估计算法；（3）位于网络边缘节点的接纳控制算法；给出了该方案在视频传输方面的应用实例；利用多种网络拓扑结构和QoS指标评价该方案的性能，实验结果表明该方案能准确地控制可接纳区域和提高网络资源的利用率。

A Measurement-Based Admission Control Scheme for DiffServ Network: Design and Application

Due to the scalability problem of Integrated Services (IntServ) network, Differentiated Services (DiffServ) architecture was proposed to provide Quality of Services (QoS) support for aggregate traffic rather than individual flows. It requires no per flow state management and signaling process at each router. However, DiffServ can not provide end to end QoS guarantees for aggregated flows because of lacking effective Connection Admission Control (CAC) mechanism. This paper presents a distributed and scalable admission control scheme to provide end to end statistical QoS guarantee for DiffServ network. The scheme consists of three main elements: (1) a new sender initiated admission control protocol to transfer messages between end hosts and edge routers, or edge router and bandwidth broker, (2) available bandwidth measurement and estimation, and (3) admission control algorithm. Authors present an example of applying the proposed scheme to object based video transmission. The performance of the scheme is evaluated with a variety of QoS metrics and network topologies. The simulation results demonstrate that the proposed scheme can accurately control the admissible region and effectively improve the utilization of network resource.