Congestion control schemes in prioritized ATM networks
P. Yegani, Marwan Krunz, Herman D. Hughes · 2002
One of the fundamental challenges facing broadband information transport is to determine congestion control strategies to support multiple classes of traffic in the future asynchronous transfer mode (ATM)-based broadband integrated services digital networks (B-ISDN). To accomplish this in a flexible and a cost-effective manner, priority classes for the different services are commonly used. The authors study priority queueing schemes implemented in a statistical multiplexer with shared and separate buffers, whose input consists of superposition of voice and data traffic. A performance comparison is given for two buffer access schemes: the common nested threshold cell discarding (NTCD) with single shared buffer and NTCD with multiple buffers (NTCD-MB). The arrival process to the multiplexer is approximated using a Markov modulated Poisson process (MMPP). It is shown that when implementing the NTCD-MB priority scheme, the parameters of the switching node can be adjusted in such away that the service quality is guaranteed for different classes of traffic. The improved performance as a result of implementing such scheme is investigated via simulations.>