Temporal and Spectral 2D Fragmentation-Aware RMSA Algorithm for Advance Reservation Requests in EONs

In this paper, we explore the problem of routing, modulation and spectrum assignment (RMSA) for advance reservation (AR) requests in elastic optical networks (EONs), with objective to further reduce blocking probability improve utilization. On one hand, propose a minimum resource consumption routing policy (MRC) leaving more free resources future requests. other introduce two-dimensional (2D) path model, which each AR request can be transformed into rectangle block whose length width are related bandwidth duration respectively. Therefore, is simplified packing problem. Furthermore, design several factors evaluate fragmentation caused by operation, where consider situation neighborhood first time. Based on these factors, fragmentation-aware strategy (2D-FA). Through combination MRC 2D-FA, novel RMSA algorithm named MRC-2D-FA dynamically provisioning EONs. Simulation results show that achieve lower higher utilization compared well-performed benchmark algorithms.