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1 1999

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Quantitative analysis of 'BET-TER' scheduling algorithm capabilities in handling best effort traffic in ATM networks

Burakowski W., Ahmed A.M.

Systems Science

1999

Vol. 25, nr 4

71-81

ATM networks have to handle at least two types of traffic. A Guaranteed Bandwidth Traffic (GBT), and the so-called Best Effort Traffic (BET). In order to handle these types of traffic properly, ATM network must, firstly, guarantee the QoS of the GBT, and secondly, at the same time, obtain a high level of network resources utilization by serving the BET traffic. Some schedulers guarantee the quality of service of GBT, but cause the starvation of BET traffic. Other schedulers such as WFQ assign a non-zero weight to BET in order to avoid its starvation. In the paper we demonstrate that the proposed earlier BET-TER scheduling algorithm handles the GBT and BET without the above mentioned drawbacks of known scheduling disciplines. This is proven, in the paper, via analytical quantitative analysis and simulation experiments.