Abstract

Recent studies have established the feasibility of the Space division multiplexing enabled elastic optical network (SDM-e-EONs); however, in addition to spectrum, such networks also introduce an additional dimension of ‘space’. Hence, complexity in controlling the SDM-e-EONs is much higher compared to the EONs and therefore, to optimize the SDM-e-EONs, algorithms of higher efficiency has to be formulated which also ensure the generation of high quality solutions in reasonable execution times. In the current work, we formulate a routing, space, and spectrum assignment (RSSA) model which relaxes the space continuity constraint. Further, we also propose an efficient RSSA algorithm which includes parallelization of the algorithm in addition to the implementation of efficient data structures. To improve quality of the solutions, we implement appropriate methods which estimate the lower bounds of the solutions. Through extensive simulations we demonstrate that the proposed methods substantially quicken the optimal solution search for the RSSA problem, and are also able to obtain solutions of high quality.

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