Congestion-Aware Dynamic RMCSA Algorithm for Spatially Multiplexed Elastic Optical Networks

We have proposed a dynamic Routing, Core, Modulation and Spectrum Assignment (RMCSA) algorithm for spatially multiplexed elastic optical networks with distance adaptive modulation formats. The algorithm finds an alternative candidate path based on the real-time traffic metric of the links. The algorithm reduces the connection-blocking probability by balancing the traffic load among network links. Extensive simulations are performed to validate the performance in terms of connection blocking and resource utilization efficiency. The results verify that the proposed algorithm performs significantly better than the benchmark K-shortest path routing and fragmentation-aware exact-fit spectrum allocation algorithms. The proposed algorithm with two alternative candidate paths outperforms the conventional K-shortest routing based RMCSA algorithm with four candidate paths.