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Traffic anomalies are abnormal changes in network traffic. There are many causes of resulting in traffic anomaly changes, including network fault, abuse, network attack and so on. This paper proposes a novel method for detecting traffic anomalies in a network. Firstly, all Origin-Destination (OD) flows in the network are grouped with accordance with common destination nodes. We then make time-frequency...
Origin-Destination (OD) traffic anomalies reflect network-level traffic anomaly behaviors, which is significantly dangerous to network operation. OD traffic anomalies in a network are investigated in this paper, using statistical analysis based on principle component analysis (PCA). Firstly, we use PCA method to analyze network traffic characteristics and to divide OD flows in the network into both...
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