Traffic grooming and clique partitioning‐based spectrum assignment in elastic optical networks

Abstract

We adopt a fragmentation reducing policy for spectrum assignment and incorporate it with multicast traffic grooming in EON. To reduce fragmentation, the spectrum is partitioned based on the clique partitioning approach and spectral slots are assigned to traffic demands depending on which partition they belong. Simulation results predict that the proposed approach has better spectrum slot utilization compared to the state-of-the-art non-partitioning approach and the proposed approach reduces fragmentation, and also has less blocking ratio compared to the state-of-the-art partitioning approach.