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In this paper, the authors analyze the stochastic characteristic of the measured Video Teleconference Service Traffic (VTST) and propose a mathematical model of the VTST based on the analyzed stochastic characteristic. From their analysis, a voice traffic can be modeled by a poisson process or renewal process with deterministic inter arrival times and fixed packet size. On the other hand, a video traffic is modeled by an ON and OFF source, where ON and OFF periods are according to exponential distribution with respective parameter. Using the mathematical model, they estimate the required bandwidth to satisfy a given quality of service requirement for the VTST. To show the validity of their analysis, numerical studies, the effectiveness of adaptive algorithm for estimation of effective bandwidth in VTST is done.
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