An Atm Traac Model Based on Empirical Traac Measurements

The characterization of ATM traac is very important in many aspects such as validating traac models, designing congestion control algorithms, implementing communication protocols, and developing switch architectures. In this paper, we present measurements of applications obtained from the High-Speed Networking and Performance Lab (HSNP) at Michigan State University. These applications are selected based on studies of Wide-Area TCP/IP traac measurements conducted by Danzig et al. 1, 2, 3]. Experimental results designed to investigate traac characteristics from a large amount of data collected, are discussed. Traac descriptors such as peak rate and mean rate are calculated from the gathered data. These descriptors are used to deene parameters for an ATM LAN/WAN workload model. A procedure for developing this workload model is presented. Cumulative distributions of the measured data are compared to those of simulated data as a way to validate the ATM workload model. A statistical test shows that there is no signiicant diierence between the simulated data and the measured data. This workload model can be used to generate diierent types of application traac in an ATM LAN/WAN. Such model is also useful for studying communication protocols, scheduling algorithms, and congestion control schemes for ATM networks.