Boşluk-doldurma çizelgelemesi kullanan OBS ağlarında çoğuşma uzunluğunun kayıp olasılığına etkisi

Optical burst switching (OBS) is a new transport architecture for the next gener-ation optical internet infrastructure which is necessary for the increasing demandof high speed data traffic. Optical burst switching stands between optical packetswitching, which is technologically difficult, and optical circuit switching, whichis not capable of efficiently transporting bursty internet traffic. Apart from itspromising features, optical burst switching suffers from high traffic blocking prob-abilities. Wavelength conversion coupled with fiber delay lines (FDL) provide oneof the best means of contention resolution in optical burst switching networks.In this thesis, we examine the relation between burst loss probability and burstsizes for void filling scheduling algorithms. Simulations are performed for variousvalues of the processing and switching times and for different values of wave-lengths per fiber and FDL granularity. The main contribution of this thesis isthe analysis of the relationship between burst sizes and processing time and FDLinduced voids. This in turn creates a better understanding of the burstificationand contention resolution mechanisms in OBS networks. We show that voids gen-erated during scheduling are governed by the FDL granularity and the product ofthe per-hop processing delay and residual number of hops until the destination.We also show that differentiation between bursts with different sizes is achievedfor different network parameters and a differentiation mechanism based on burstlengths is proposed for OBS networks.