Fragmentation-Aware Demand Routing on Elastic Optical Network

In this paper, we address the demand routing problem in elastic optical networks (EONs), where the objective is to establish suitable lightpaths for each connection request. Our contribution lies in proposing two fragmentation-aware algorithms that take into account both fragmentation and misalignment factors. These algorithms are designed to determine optimal routing paths, modulation formats, and spectrum assignments in EONs. Through comprehensive simulations, we assess the performance of the proposed algorithms in terms of bandwidth blocking probability (BBP) and demonstrate their efficacy in achieving favorable outcomes. Considering the misalignment measure can yield better BBP values than algorithms only considering fragmentation.