COST 257 MID-TERM SEMINAR INTERIM REPORT ON SOURCE CHARACTERIZATION Source Characterization in Broadband Networks

Preface This interim report provides an overview of results on source characterization obtained in the COST 257 Action on " Impacts of New Services on the Architecture and Performance of Broadband Networks ". First, the results related to fractal traffic characterization is presented. Multifractal analysis, the issue of non-stationarity and long-range dependent (LRD) traffic models are discussed. Three models have been investigated which can exhibit LRD features: quasi-Markovian models, superposed heavy-tailed on/off models and shifting level models. Finally, the impact of LRD on queueing performance is discussed in this section. Second, the issue of spatial traffic characterization is addressed and the estimation and characterization of expected teletraffic demand is investigated. Next, studies on the second order traffic descriptors to characterize MAPs and investigations on the application of generalized peakedness are outlined. Finally, research results concerning Internet traffic characterization are presented. The report is based on the COST 257 technical documents. The editors are thankful to P. Mannersalo for his contribution to the report. Contributors of the following authors have been used: A.