Priority statistical multiplexing of mixed VBR video and CBR traffic in B-ISDN/ATM with a threshold algorithm

The authors analyze a threshold priority access statistical multiplexing technique with a Markov modulated fluid source model for variable-bit-rate (VBR) video traffic, and an exact constant-bit-rate (CBR) model. Exact expressions for loss probabilities and delay are obtained. Based on these quality-of-service parameters, buffer size requirements of the statistical multiplexer are obtained, and the performance of a fixed threshold algorithm is compared with that of a rate-based threshold algorithm. The results provide the tradeoffs between buffer size and processing complexity for control. The exact analytical results can be used to calculate buffer size requirements.