Bandwidth allocation of multiple QOS classes in ATM environment

For future broadband-ISDN, asynchronous transfer mode (ATM) is designed not only to support a wide range of traffic classes with diverse flow characteristics (e.g., burstiness, bit rate and burst length), but to guarantee the different quality of service (QOS) requirements as well. The QOS may be measured in terms of cell loss probability and maximum cell delay. The authors consider the ATM network in which the virtual path (VP) concept is implemented. By applying the Markov modulated deterministic process method, they develop an efficient algorithm to compute the minimum capacity required to satisfy all the QOS requirements when multiple classes of on-off sources are multiplexed onto a single VP. Using the result, they then propose a simple algorithm to determine the VP combination to achieve the near optimum of the total capacity required for satisfying the individual QOS requirements. Numerical results are also presented to demonstrate the performance of the algorithm when compared to the optimal total capacity required