Split-Demand and Multipath Routing in Space-Division Multiplexing Optical Networks

The dynamic spectrum allocation in Elastic Optical Networks with Space-Division Multiplexing can cause high spectrum fragmentation, reducing the probability for future connection establishments. This paper proposes a multipath routing algorithm to improve the spectrum allocation in EON-SDM networks using Multi-Core Fibers. The multipath algorithm parallelizes the search for frequency slots to be allocated to a lightpath and avoids the allocation of bands that can increase the fragmentation of the spectrum. Results show that our algorithm can effectively reduce the blocking probability of requests for connection establishment.