Effect of Burst Assembly on Data Loss in OBS Network under Correlated Input Traffic

Abstract

A computational framework for determining the data loss rate for three basic types of burst assembly algorithms of optical burst switched(OBS) network is proposed here. The model is based on our previous work, where a computational scheme for capturing the effect of time correlation of input IP-packet sources on characteristics of assembled burst under various burst assembly algorithms, has been developed. So, the framework, presented here, is also capable of analysing the impact of time correlation on data loss under basic types of burst assemblers. We observe that data loss increases with increase in source correlation for all types of assembler though the effect is more emphasised in case of timer based assembler in comparison with burst threshold based assembler. With the proposed model, the constant loss contours in load-correlation plane for parameterized assembler has also been obtained. This can be applied to design initial assembly parameters for static assemblers and adaptation rules for dynamic assemblers under varying load and source traffic correlation.