Modeling and Queuing Analysis of Variable- Bit-rate Mpeg Video Streams

In this paper modeling and queuing analysis of variable-bit-rate (VBR) MPEG coded video sources transmitted over B-ISDN networks are studied. A low pass version of the aggregate MPEG sequence is examined so that the network resources are analytically predicted. Based on this simplified signal, a discrete-state continuous-time Markov chain is proposed to approximate the MPEG video traffic. Then, queuing analysis is performed for obtaining analytical solution of cell losses and average buffer size. The overall analysis is relied on a fluid flow approximation of MPEG video traffic, in which the queue can be viewed as a reservoir of water that is fed from water supplies of time varying rates and that empties through a fixed rate sink. Experimental results, indicating the good performance of the proposed model, are finally presented using MPEG coded video streams.