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Grooming Benefits on Designing Elastic Optical Networks: An Exact Formulation

This work proposes a new Mixed Integer Linear Programming (MILP) formulation for traffic grooming, routing and spectrum allocation to be used in the design of Elastic Optical Networks (EON). In order to compare our method with classic Routing and Spectrum Allocation (RSA) formulation without grooming, the evaluation of the benefits of exact traffic grooming and RSA formulation are presented over three small networks. For each network, the objective function is set as minimizing the maximum slot index among all fibers. Then, the collected results show the benefits of traffic grooming in EON networks. Due to the NP characteristic of the MILP proposed, we propose a heuristic algorithm for large networks, and the benefits of the grooming using this algorithm are investigated.