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Algorithmes et mécanismes pour la qualité de service dans des réseaux hétérogènes

Abstract : The notion of quality of service (QoS) is very essential each time we want to transfer the information with a maximum of reliability. The main metrics of QoS are the throughput, the delay, the jitter and the loss rate. In addition, the various natures of applications leads to heterogeneity of the data : elastic flows require a guaranteed throughput while non-elastic flows require a guaranteed delay. The scheduling algorithms that use a proportional differentiation make possible to fairly share the resources between applications, according to their needs. However, the proportionality was carried out according to only one quality metric (throughput, delay or loss rate). Thus, we designed and propose a scheduling algorithm using proportional differentiation, founded on the power function which is the ratio of two criteria: the delay and the throughput. PSP scheduler (Power as a Scheduling Parameter) offers a fairly resource sharing between the applications that have different needs. In this way, no class suffers from the famine phenomenon. The implementation and the tests of the scheduler were carried out by the ns-2 simulation tool.
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Submitted on : Monday, February 16, 2004 - 9:51:30 AM
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  • HAL Id : tel-00004662, version 1




Leila Toumi. Algorithmes et mécanismes pour la qualité de service dans des réseaux hétérogènes. Réseaux et télécommunications [cs.NI]. Institut National Polytechnique de Grenoble - INPG, 2002. Français. ⟨tel-00004662⟩



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