An Efficient Optimization Framework for Solving RSSA Problems in Spectrally and Spatially Flexible Optical Networks

We focus on the routing, spatial mode, and spectrum allocation (RSSA) problem-a basic optimization problem in spectrally and spatially flexible optical networks (SS-FON). RSSA is a very challenging problem since it introduces a new dimension, related to the selection of spatial resources, to the already complex (NP-hard) routing and spectrum allocation (RSA) problem. To allow solving large RSSA problem instances, in particular, in optical...