自适应带宽下的SDN网络负载均衡策略  

SDN network load balancing strategy based on adaptive bandwidth

作　　者：王明芬 卢宇 WANG Ming-fen;LU Yu(Concord University College,Fujian Normal University,Fuzhou,Fujian 350117,China)

机构地区：[1]福建师范大学协和学院信息技术系,福建福州350117

出　　处：《宁德师范学院学报（自然科学版）》2023年第3期246-253,共8页Journal of Ningde Normal University(Natural Science)

基　　金：福建省中青年教师教育科研项目(JAT200965);福建省教育科学“十三五”规划项目(FJJKCG19-106);福建师范大学协和学院科研团队基金(2020-TD-001).

摘　　要：理想的负载均衡策略应该能在历史流量数据集的基础上,根据网络态势选择合适的带宽转发数据.提出基于自适应带宽的多路径负载均衡策略.首先采用HK聚类算法的类别中心设计端口带宽队列集合;队列能根据流量大小的变化自适应分配带宽;其次计算多路径的链路权值,在选定带宽的基础上综合考虑路径长度、带宽利用率和网络时延对链路权值的影响;最后结合OpenFlow组表里的动作桶权重实现多径负载均衡.实验表明,所提算法在软件定义网络(SDN)中端口负载均衡效果明显,网络抖动和丢包率都优于传统的等价多路径算法,能够更好地提高SDN的性能.An ideal load balancing strategy should be able to select the appropriate bandwidth to forward data according to the network situation based on the historical traffic data set.A multi-path load balancing strategy is proposed based on adaptive bandwidth.Firstly,an information collection module is designed on the RYU controller,and the HK clustering algorithm is used to classify the historical traffic of the network into category centers,and the port bandwidth queue set is designed.The queue band can adaptively allocate bandwidth ac⁃cording to the change of traffic size.Secondly,the link weight of multi-path is calculated,and the influence of path length,bandwidth utilization rate and network delay on the link weight is comprehensively considered on the basis of the selected bandwidth.Then the action bucket weights are combined in the OpenFlow group table to achieve multi-path load balancing.Experiments show that the device port load balancing effect is obvious in the SDN network.The network jitter and packet loss rate of the algorithm are better than those of the traditional equivalent-cost multipath algorithm,which can better improve the performance of the SDN network.

关 键 词：软件定义网络 OpenFlow 链路权值 负载均衡 带宽聚类 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]