Multipath Routing, Spectrum and Core Allocation in Protected SDM Elastic Optical Networks

The adoption ofSpace division multiplexing (SDM) in elastic optical networks brings new challenges for spectrum allocation. This paper proposes an algorithm for routing, spectrum and core allocation based on single/multipath routing for providing path protection. The proposed solution has the advantage of using small contiguous bands divided into several paths to provide the request protected bandwidth, allowing the increase in the number of requests accepted. Results show that the proposed algorithm can decrease the blocking ratio by three orders of magnitude when compared with other existing algorithms.