一种新型VPN网络设计及QoS性能仿真

通过对现有各专网方案所存在问题及未来数据网络演进趋势的分 析，以ATM-MPLS重叠网络的方式设计了一种新型VPN方案，并提出在现网的具体构建策略， 证明了该方案具有现实部署的可行性。通过OPNET实现语音、数据及视频等多业务的仿真模 拟，其中以数据业务响应时间作为量化指标，仿真结果表明该新型网络在高负载下响应时间 在0.6 s以内，且不累积拥塞，具有类似ATM的技术优势，为宽带网络演进提供了一种解 决思路。

Design and QoS simulation of a new type of virtual private network

By analysing both the shortcomings of the existing private networks and the evol ution trend of data networks, a new type of VPN(Virtual Private Network) solutio n is designed. Then the construction strategies for existing networks are propos ed, and the new VPN solution is proved to be feasible. Voice/data/video services are simu lated by OPNET, and under the condition of the heavy background traffic the res ponse time of the new VPN solution is less than 0.6 s without congestion. This n e w VPN solution is considered to be a good solution for the evolution of broa dband networks.