LoSS Detection Approach Based on ESOSS and ASOSS Models

This paper investigates loss of self-similarity (LoSS) detection performance using exact and asymptotic second order self-similarity (ESOSS and ASOSS) models. Previous works on LoSS detection have used ESOSS model with fixed sampling that we believe is insufficient to reveal LoSS detection efficiently. In this work, we study two variables known as sampling level and correlation lag in order to improve LoSS detection accuracy. This is important when ESOSS and ASOSS models are considered concurrently in the self-similarity parameter estimation method. We used the optimization method (OM) to estimate the self-similarity parameter value since it was proven faster and more accurate compared to known methods in the literature. Our simulation results show that normal traffic behavior is not influenced by the sampling parameter. For abnormal traffic, however, LoSS detection accuracy is very much affected by the value of sampling level and correlation lag used in the estimation.