基于Holt双参数指数平滑法的SDN交换机流表超时优化策略  

The Timeout Optimization Strategy of SDN Switch Flow Table Based on Holt Two-parameter Exponential Smoothing Method

作　　者：王宣立 黄道颖 张安琳 董帅 刘江豪 WANG Xuan-li;HUANG Dao-ying;ZHANG An-lin;DONG Shuai;LIU Jiang-hao(College of Computer and Communication Engineering,Zhengzhou University of Light Industry,Zhengzhou 450000,China;Engineering Training Center,Zhengzhou University of Light Industry,Zhengzhou 450000,China)

机构地区：[1]郑州轻工业大学计算机与通信工程学院,郑州450000 [2]郑州轻工业大学工程训练中心,郑州450000

出　　处：《火力与指挥控制》2020年第10期90-94,99,共6页Fire Control & Command Control

基　　金：国家科技支撑计划基金(2006BAK01A38);河南省教育厅基础研究基金资助项目(15A120020)。

摘　　要：OpenFlow交换机流表容量有限,现有的流表更新机制在网络流量高峰时期会严重影响网络的稳定。针对这个问题,提出了一种基于Holt双参数指数平滑法的流表超时时间更新策略.通过预测下一个周期的流表项新增数量,得到流表超时时间调整参数,以此动态调整流表项的超时时间,通过仿真实验表明,该策略可以有效提高OpenFlow交换机流表空间利用率、数据转发成功率和流表项适配率,达到提升网络性能的效果。The OpenFlow switch has a limited flow table capacity.The existing flow table update mechanism will seriously affect network stability during peak periods of network traffic.In response to this problem,a time-out update strategy of flow table based on holt two-parameter exponential smoothing method is proposed.By predicting the new inereasing number of flow table items in the next cycle,the time-out adjustment parameters of flow table can be obtained to dynamically adjust the time-out time of flow table items.Simulation experiments show that this strategy can effectively improve the utilization rate of the flow table space,the success rate of data retransmission,and the adaptation rate of the flow table ilems of the OpenFlow switch,thereby achieving the effect of improving network performance.

关 键 词：OpenFlow 流表 Holt双参数指数平滑法 流表更新算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]