Quality-of-service differentiation and fairness in optical burst-switched networks

Fabrice Poppe; Koenraad Laevens; Herman Michiel; Serge Molenaar

doi:10.1117/12.475290

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3 July 2002 Quality-of-service differentiation and fairness in optical burst-switched networks

Fabrice Poppe; Koenraad Laevens; Herman Michiel; Serge Molenaar

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Proceedings Volume 4874, OptiComm 2002: Optical Networking and Communications; (2002) https://doi.org/10.1117/12.475290
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

A mechanism that is often proposed for Quality-of-Service differentiation in Optical Burst-Switched networks is offset-time management. In this paper we identify and explain some undesired characteristics of this mechanism. The most important finding is that the burst drop probability differentiation that is attained for a given offset-time value strongly depends on the distribution of the burst durations. Hence control of the differentiation is difficult, since the distribution of burst durations is subject to changes all the time, depending on the traffic conditions at the edge of the OBS network. We also found that offset-time management slightly increases the unfairness within the lower priority classes, in the sense that longer bursts are dropped more frequently than shorter ones.

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Fabrice Poppe, Koenraad Laevens, Herman Michiel, and Serge Molenaar "Quality-of-service differentiation and fairness in optical burst-switched networks", Proc. SPIE 4874, OptiComm 2002: Optical Networking and Communications, (3 July 2002); https://doi.org/10.1117/12.475290

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