基于NS2的校园网服务质量控制模型设计及实现

Campus Network QOS Model on NS2

ATM(AsynchronousTransferMode)在多媒体应用中的服务质量QOS(QualityofService)的优势使其成为综合业务模型中的一种新的技术。文章首先介绍了QOS定义和VINT项目(VirtualInter-NetworkTestbed)及其网络模拟环境NS2(NetworkSimulation2),重点阐述了基于NS2的CIPOA(ClassicalIPoverATM)的具体模型的实现,并在此基础上实现了校园网络的一种用户优先级的QOS策略,通过控制ATM交换虚通道(SVCs)获得更好的服务质量。

ATM technology makes the integrated service Internet supporting running real-time and multimedia applica-tions rapidly become a reality.This paper describes the design and implementation of the simulation of a campus net-work model supporting IP over ATM in the NS2simulator,which is the simulation engine being developed within the Virtual Inter-Network Testbed(VINT)project.On this model,It also provides quality-of-service(QoS)guarantees for inter-net traffic running through ATM subnets in the NS2simulator,which provides an IP integrated service with QoS over ATM switched virtual circuits(SVCs )to obtain better performance of packet delivery.