Many network monitoring applications and performance analysis tools are based on the study of an aggregate measure of network\r\ntraffic, for example, number of packets in transit (NPT). The simulation modeling and analysis of this type of performance\r\nindicator enables a theoretical investigation of the underlying complex system through different combination of network setups\r\nsuch as routing algorithms, network source loads or network topologies. To detect stationary increase of network source load, we\r\npropose a dynamic principal component analysis (PCA) method, first to extract data features and then to detect a stationary load\r\nincrease. The proposed detection schemes are based on either the major or the minor principal components of network traffic\r\ndata. To demonstrate the applications of the proposed method, we first applied them to some synthetic data and then to network\r\ntraffic data simulated from the packet switching network (PSN) model. The proposed detection schemes, based on dynamic PCA,\r\nshow enhanced performance in detecting an increase of network load for the simulated network traffic data. These results show\r\nusefulness of a new feature extraction method based on dynamic PCA that creates additional feature variables for event detection\r\nin a univariate time series.
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