A CAC scheme based on real-time cell loss estimation for ATM multiplexers

For the superposition of ON/OFF sources, we propose a real-time computable two-state Markov modulated Poisson process [MMPP(2)] modeling method charac terizing the aggregate cell arrival rate and the variance-time curve for ce ll counts. Numerical examples show that the proposed method yields a good e stimation of cell loss ratio (CLR) in asynchronous transfer mode (ATM) mult iplexers, Then, we propose an approximation method for calculating the work load for the MMPP(2)/D/1 system. By considering the workload as an upper bo und of CLR of ATM multiplexers, He propose a connection admission control ( CAC) algorithm utilizing peak cell rate, sustainable cell rate, and maximum burst size as user traffic descriptors. Using the proposed CAC algorithm, an acceptance decision is made with computational complexities of less than 3000 floating point operations. It is also observed from numerical evaluat ions that the proposed CAC algorithm yields a high multiplexing gain, compa red with other methods in the literature.