SDN和MEC架构下高铁网络多维资源适配架构研究

Research on Multidimensional Resource Adaptation Architecture with MEC and SDN in High-speed Rail Networks

为了满足高铁网络中不同业务对带宽、延迟、可靠性等多元化的要求,采用集中式与分布式相结合的方法,提出一种基于SDN和MEC的高铁网络多维资源适配架构,采用了SDN逻辑集中控制和MEC的关键技术和方法,并在SDN控制器、MEC服务器和软件定义移动单元三个实体上设计了核心功能组件,实现链路状态信息实时收集、多维网络资源动态适配、服务及时响应等能力,通过一个实际的高铁网络应用案例测试验证了该架构在时延、丢包率等方面的性能提升,最后讨论了该架构未来的一些问题和研究方向。

To meet the diversified requirements of different services in the high-speed rail networks,such as bandwidth,delay,and reliability,a multi-dimensional resource adaptation architecture of high-speed rail networks based on software-defined networking(SDN)and multi-access edge computing(MEC)is proposed.It adopts the key technologies and methods of SDN logic centralized con-trol and MEC,and designs core functional components on three entities of the SDN controller,MEC server and software-defined mo-bile unit.It realizes the real-time collection of link state information,dynamic adaptation of multi-dimensional network resources,and timely response to services.Through a practical high-speed rail network application case test,it verifies the performance improvement of the architecture in terms of reliability,delay and resource utilization.Finally,some future problems and research directions of the architecture are discussed.