Delay - jitter Bound and Statistical Loss Bound forHeterogeneous

Network support for variable bit-rate video needs to consider (i) properties of workload induced (e.g., signiicant auto-correlations into far lags and diierent marginal distributions among connections) and (ii) application speciic bounds on delay-jitter and statistical cell-loss probabilities. The objective of this paper is to present a quality-of-service solution for such traac at each multiplexing point in the network. Heterogeneity in both ooered workload and quality-of-service needs are addressed. The framing strategy introduced by Golestani is generalized by inducing the framing structure on virtual circuits (VCs) rather than on communication links. This results in eliminating the phase mismatch between incoming and outgoing frames at the switches. Hence, a signiicant reduction in delay and buuer requirements at each switch traversed by the VC is achieved. An architecture design that can be implemented in a moderate cost is also presented. The framing strategy is combined with an active cell discard, a pseudo earliest-due-date cell dispatcher, and a dropping policy to provide heterogeneous cell-loss bounds, exploit statistical multiplexingand maximize output-link eeciency. An upper bounds on the equivalent bandwidth needed are also calculated and some numerical and simulation results for actual MPEG-I video traces are included.