Network Quality Degradation Detection Method by Using Network Specification

The authors propose a framework and a detection method for network quality degradation. The framework has three functions. The first function is making a topology tree and selecting flows by watching network traffic at a single point probe. The second function is inferring a network specification, whether a flow has wireless link or not, by frequency analysis. The third function is the network quality anomaly detection by frequency analysis, then inferring the bad links. In this paper, the authors discuss the useful flows in the next generation networks for first function, and the use of the second and the third function under the condition of intermingled wireless and wired links.