Spectral utilization efficient coarse granular routing optical networks with resiliency against multiple failures

Abstract

A spectral-utilization-efficient and multiple-failure-resilient coarse granular routing optical network architecture is proposed. This work is based on our previously proposal of shared path protected networks with dense channel accommodation to coarse granular (grouped routing) optical pipes. Its advances, which include enhanced path and pipe restoration, mean that the proposed networks not only resolve the optical filtering impairment issue at nodes but also achieve higher survivability. Numerical evaluations prove that the number of fibers needed is reduced by up to 20% relative to conventional networks with the same resiliency.