SDN支撑的MEC系统效能评估综述

传统的“智能终端-互联网-云计算中心”的服务架构难以适应延迟敏感应用的需求。移动边缘计算( MEC: Mobile Edge Computing) 将计算资源、存储资源和网络资源部署到互联网边缘，提高了用户和终端的资源获取速度。然而，移动边缘计算仅实现了计算与存储的管理，为了实现网络资源与计算存储资源的协同控制，需要结合软件定义网络( SDN: Software-Defined Networks) 技术构成完整的弹性服务方案。在总结MEC 应用场景和MEC 系统优化的国内外进展的基础上，给出一种移动边缘计算与软件定义网络联合系统( MEC-SDN) 的系统架构，从计算任务、通信开销、计算开销和资源分配的角度介绍移动边缘计算效能评估的研究进展。最后，对MEC-SDN 系统的未来应用领域给出了展望。

Survey on Performance Evaluation for Mobile Edge Computing Combined with SDN Networks#br#

Traditional cloud computing service chain consists of intelligent terminals， internet and cloud datacenter，is inefficient for latency sensitive applications． MEC ( Mobile Edge Computing) pushs compute power，storage power，and network resources to the edge of the Internet to improve service speed for users and terminals． However，MEC can only manage compute resources and storage resources． MEC is combined with SDN ( Software-Defined Networks) for the sake of collaborative management of compute，storage and network resources． The state-of-the-art MEC scenarios and MEC improvement researches are investigated． A MEC-SDN system architecture is proposed in terms of MEC，SDN and cloud datacenter． The latest researches on MEC system evaluation are concluded in terms of application task，communication overhead，compute overhead and resource allocation． Finally，several encouraging areas of MEC-SDN in the future are shown．