This paper presents Classified Cloning, a novel QoS provisioning mechanism for OBS networks carrying real-time

applications (such as video on demand, Voice over IP, online

gaming and Grid computing). It provides such applications with a minimum loss rate while minimizing end-to-end delay and jitter. ns-2 has been used as the simulation tool, with new OBS modules having been developed for performance evaluation purposes. Ingress node performance has been investigated, as well as the overall performance of the suggested scheme. The results obtained showed that new scheme has superior performance to classical cloning. In particular, QoS provisioning offers a guaranteed burst loss rate, delay and expected value of jitter, unlike existing proposals for QoS implementation in OBS which use the burst offset time to provide such differentiation. Indeed, classical schemes increase both end-to-end delay and

jitter. It is shown that the burst loss rate is reduced by 50% reduced over classical cloning

Askar, Shavan K A

Hunter, David K

Simeonidou, Dimitra

Zervas, Georgios S

English

In this paper we present a novel QoS provisioningmechanism with real-time applications (such as video on demand,Voice over IP, online gaming or Grid computing) when traverseover OBS networks. Classified Cloning is proposed to providesuch applications a minimum loss rate while maintain the lowestend-to-end delay and jitter values. NS-2 Simulator has been usedas the simulation tool after developing new OBS modules for theevaluation purposes. An investigation for the performance of theingress node has been done in addition to the evaluation of theperformance of the suggested scheme. The obtained resultsshowed the outperformance of the suggested scheme over theclassical cloning scheme. In particular, the QoS provisioning interm of loss rate, delay and the expectance of enhanced jitter areguaranteed over the existing QoS guaranteeing-service schemelike using of the offset time for providing a differentiation serviceas those classical schemes will increase the end to end delay of theoriginal applications plus the incurred jitter. It is showed that50% of the loss rate has been reduced as compared to theperformance of the classical cloning scheme

A Novel QoS provisioning Scheme for OBS networks

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