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Evaluating performance of the MPQ policy for input and output queueing ATM switch supporting multiple traffic classes

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1 Author(s)
S. Ahmed ; Fac. of Eng., Universiti Pertanian Malaysia, Selangor, Malaysia

We propose a mixed priority queueing (MPQ) model to improve the quality of service (QOS) for 3 different classes of traffic in an ATM switch. A single stage input and output buffered nonblocking ATM switch is considered. In order to resolve a certain degree of external conflicts at the output ports, the switching fabric allows limited queueing at the output ports incorporating output buffers of a suitable size. The problem of overflow at the output buffers is solved by placing rejected cells in the input port buffers. The MPQ scheme is implemented as a buffer management scheme on the input and output port buffers of the switch. Using computer simulation under both uniform and bursty traffic, the paper analyzes the throughput, delay and cell loss probability (CLP) for the each class of traffic with a variety of traffic loads and switch sizes. It is shown that the performance of the ATM switch increases in terms of throughput, delay and cell loss probability (CLP)

Published in:

Networks, 1995. Theme: Electrotechnology 2000: Communications and Networks. [in conjunction with the] International Conference on Information Engineering., Proceedings of IEEE Singapore International

Date of Conference:

3-7 Jul 1995