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A Diffusion Cell Loss Estimate for ATM with Multiclass Bursty Traffic

  • Erol Gelenbe
  • Xiaowen Mang
  • Yutao Feng
Chapter
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT)

Abstract

We describe a diffusion approximation model for an ATM statistical multiplexer using the instantaneous return model approach (Gelenbe, 1975). Two Cell Loss Estimates are proposed for multiclass traffic. Our aim is to provide a novel conservative, accurate and computationally efficient method for predicting cell loss probabilities which we call the Finite Buffer Diffusion Cell Loss Estimate (FBDCLE) and Infinite Buffer Diffusion Cell Loss Estimate (IBDCLE). We evaluate their accuracy by comparing them with simulation results using a wide variety of input traffic characteristics. In particular we test the model with traffic which is a mixture of different “On-Off” sources with varying loads. Both homogeneous and heterogeneous aggregated arrival processes have been taken into account. These comparisons, which include evaluations of the statistical confidence of the simulation runs, show that our model predictions are very close to the simulation results. In particular, FBDCLE is a conservative upper bound to cell loss ratio, while the other (IBDCLE) provides an accurate predictor which may slightly under-estimate or over-estimate cell loss.

Keywords

ATM network performance prediction quality of service queueing theory diffusion model call admission control bandwidth allocation. 

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Copyright information

© IFIP International Federation for Information Processing 1996

Authors and Affiliations

  • Erol Gelenbe
    • 1
  • Xiaowen Mang
    • 2
  • Yutao Feng
    • 1
  1. 1.Department of Electrical and Computer EngineeringDuke UniversityDurhamUSA
  2. 2.Cascade Communications CorpWestfordUSA

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