CAJ | 학술논문

基于软件定义网络的集中管控平面，提出了一种在线流量异常检测方法。首先在控制器上在线获取OpenFlow交换机的流表信息，并构造整个网络的流量矩阵与样本熵矩阵进行组合，然后采用主成分分析方法检测异常流量。实验结果表明，相比于传统网络中利用主成分分析方法分别单独处理离线的流量矩阵或样本熵矩阵的方法，在线流量异常检测方法实现和处理方式简单、有效，异常流量能够得到快速隔离，是基于软件定义网络的一种轻量级在线流量异常检测方法。
기우연건정의망락적집중관공평면，제출료일충재선류량이상검측방법。수선재공제기상재선획취OpenFlow교환궤적류표신식，병구조정개망락적류량구진여양본적구진진행조합，연후채용주성분분석방법검측이상류량。실험결과표명，상비우전통망락중이용주성분분석방법분별단독처리리선적류량구진혹양본적구진적방법，재선류량이상검측방법실현화처리방식간단、유효，이상류량능구득도쾌속격리，시기우연건정의망락적일충경량급재선류량이상검측방법。
Based on the centralized control plane in SDN,an online traffic anomaly detection method (OpenTAD) is proposed.Firstly the flow table statistic is collected from the controller online,and the traffic matrix and sample entropy matrix are constructed and assembled.Then the PCA method is used to detect the abnormal traffic.The result of experiments show that,compared with the traditional PCA method which disposes the traffic matrix or the entropy matrix respectively offline,the OpenTAD is simple and effective,and traffic anomaly could be isolated rapidly.This method is a lightweight online traffic anomaly detection method for SDN.