Avaliação do impacto da otimização topológica no bloqueio de demanda em redes ópticas elásticas

Abstract

The considerable increase in applications that are increasingly benefiting from the resources provided by global optical networks is advancing parallel studies to increase the capacity of data traffic on these networks efficiently, while maintaining the integrity of the data transmitted by them. One of the advancements is elastic optical networks, which use flexible width slots to meet the demands most efficiently. However, the use of these intervals results in spectrum fragmentation and, as a consequence, demand blocking. These problems can be addressed through routing, modulation level adjustment, and spectrum allocation, also known as RMLSA, from Routing Modulation Level and Spectrum Assignment. This work is an extension of the study developed by (NERIS, 2017), which dealt with a similar problem, without considering different channel modulation formats. In the scope of this work a tool was developed that deals with the RMLSA problem and consequently provides data to evaluate the impact of topological optimization on the demand blocking in elastic optical networks, simulating demand requests with different traffic requirements. The present work shows how topological optimization influences demand blocking, total link occupancy rate and fragmentation rate.