基于软件定义网络技术与网络功能虚拟化技术的城市轨道交通视频监控系统新型网络架构

New Network Architecture for Urban Rail Transit Video Surveillance System Based on SDN and NFV Technologies

[目的]上海轨道交通视频监控系统面临灵活性不足、扩展性差和运维复杂等挑战。对此,提出基于SDN(软件定义网络)和NFV(网络功能虚拟化)技术的视频监控系统新型网络架构。[方法]剖析了传统网络架构的不足,深入分析了SDN技术和NFV技术的工作原理、特点及优势,详细阐述了基于SDN技术和NFV技术的视频监控系统新型网络架构。并在实验室条件下通过试验来测试该架构的性能。[结果及结论]该网络架构实现了控制层与数据转发功能的分离,实现了网络功能的虚拟化,不仅能优化资源配置,增强视频监控系统的可拓展性和可管理性,还能提供灵活的硬件配置和升级能力。试验结果表明,该架构在多视频流和高网络负载情况下的性能表现优异,有助于提高城市轨道交通视频监控系统的可靠性、安全性和实时性。

[Objective]The video surveillance system of Shanghai urban rail transit faces challenges such as insufficient flexibility,poor scalability,and complex operation and maintenance.In response,a new network architecture for video surveillance system based on SDN(software defined networking)and NFV(network function virtualization)technologies is proposed.[Method]Through analyzing in-depth the shortcomings of conventional network architecture,the working principles,characteristics,and advantages of SDN and NFV technologies,a new network architecture for video surveillance systems based on SDN and NFV technologies is elaborated.Experiments under laboratory conditions are conducted to test the performance of this architecture.[Result&Conclusion]The proposed network architecture achieves the separation of control layer and data forwarding functions,realizing the virtualization of network functions.This not only optimizes resource allocation and enhances urban rail transit video surveillance system scalability and manageability,but also provides flexible hardware configuration and upgrade capabilities.Experimental results indicate that the above-mentioned architecture performs excellently under multiple video streams and high network load conditions,contributing to improved reliability,security,and real-time performance of urban rail transit video surveillance systems.