A METHOD FOR CALL ADMISSION CONTROL IN ATM NETWORKS WITH HETEROGENEOUS SOURCES

We present a procedure for call admission control for ATM networks. Th e procedure can be applied to deciding if an additional Virtual Channe l (user, source) can be assigned to an end-to-end Virtual Path, or if a link connecting two ATM switches can carry an additional VC. Each so urce is characterized by its peak rate, mean rate, and cycle length. T he objective is to admit as many sources as possible, while meeting a desirable level of cell loss probability. We adapt an effective bandwi dth technique to the case where sources do not have to belong to a sma ll number of classes. We do this by suggesting an upper bound for the cell-loss-probability for the case of heterogeneous Markovian on-off s ources, and by showing that its computation can be performed in real t ime by the sending switch, with a reasonable amount of computational a nd storage resources. We show by simulation that the proposed procedur e is effective even for highly bursty source mixes, where it achieves more than 80% of the theoretically possible multiplexing gain.