中文摘要：

随着网络规模的爆炸性增长,网络能耗问题日益突出,面向软件定义网络（SDN）的节能技术的相关研究已成为热点。这些研究主要以网络单元、服务器等为节能方法的切入点。基于总结的现有SDN网络节能技术,归纳出一种SDN网络节能方法的分类标准,讨论了不同分类下节能方法的实现原理。最后,分析了现有方法的不足,并对未来研究方向作出了展望。

英文摘要：

With the explosive growth of network scale,the energy consumption of network had been especially prominent. So the research on energy-conservation technology of SDN had become a hot topic,which was mainly about saving-energy in terms of network components and servers. On the basis of summarizing the energy-conservation technology in SDN,this paper concluded the taxonomy of energy saving methods in SDN,and discussed the implementation principle of energy saving methods under different classification. At last,it analyzed the shortage of the existing methods and made a prospect for the future research.