E. Gelenbe et al., DIFFUSION CELL LOSS ESTIMATE FOR ATM WITH MULTICLASS BURSTY TRAFFIC, Computer systems science and engineering, 11(6), 1996, pp. 325-333
Citations number
13
Categorie Soggetti
System Science","Computer Application, Chemistry & Engineering","Computer Sciences, Special Topics","Computer Science Theory & Methods
We describe a diffusion approximation model for an ATM statistical mul
tiplexer using the instantaneous return model approach(1). Two Cell Lo
ss Estimates are proposed for multiclass traffic. Our aim is to provid
e 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 C
ell Loss Estimate (IBDCLE). We evaluate their accuracy by comparing th
em with simulation results using a wide variety of input traffic chara
cteristics. In particular we test the model with traffic which is a mi
xture of different 'On-Off' sources with varying loads. Both homogeneo
us and heterogeneous aggregated arrival processes have been taken into
account. These comparisons, which include evaluations of the statisti
cal 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 ov
er-estimate cell loss.