一种新型VPN网络设计及QoS性能仿真

Design and QoS Simulation of a New Type of Virtual Private Network

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。

By analysing both the shortcomings of the existing private networks and the evolution trend of data net- works, a new type of VPN （Virtual Private Network） solution is designed. Then the construction strategies for existing networks are proposed, and the new VPN solution is proved to be feasible. Voice/data/video services are simulated by OPNET, and under the condition of the heavy background traffic the response time of the new VPN solution is less than 0.6 s without congestion. This new VPN solution is considered to be a good solution for the evolution of broadband networks.