Modeling spatial and temporal behavior of Internet traffic anomalies

摘要

A new approach based on graph wavelets for analyzing the spatial and temporal behavior of Internet traffic anomalies is presented. This approach is applied to Internet2 traffic measurements to evaluate the time duration and spatial spread (number of links affected) of anomalies. Based on the empirical results, a node model is proposed that captures the behavior of anomalies at individual network nodes. The model considers various aspects of anomalies, such as its origin, termination, propagation, duration and volume changes. The derivation of the model parameters requires only local node information, but the model is capable of producing network-wide anomalies whose behavior mimics network wide anomalies. Model is verified by using Internet2 traffic data. Since the proposed model can be specified using only a few parameters, it can be used in place of large anomaly traces with a great data reduction. As extensions, the model is applied over a path and an aggregated model that applies to a neighborhood in the network is also presented. A method to use the graph wavelet components found during the analysis to implement a real-time anomaly monitoring system is also discussed.