On the necessity of transient performance analysis in telecommunication networks

Most analytic models of telecommunication networks are based on steady-state methods. This paper discusses potential drawbacks of steady-state parameters, in particular of the steady-state buffer-overflow or cell-loss probability when used as quality of service (QoS) criteria. The importance of transient performance analysis is demonstrated for long-range dependent (multiplexed) ON/OFF traffic. A transient parameter pair is proposed as replacement for the steady-state overflow or loss probabilities. The in-depth discussion of the behavior of those transient parameters reveals surprising results that allow for characterization and understanding of the fluctuations that are being observed in actual network behavior under traffic loads with long-range dependent properties.

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