Network Protection Design Models, a Heuristic, and a Study for Concurrent Single-Link Per Layer Failures in Three-Layer Networks
Multilayer network design has received significant attention in current literature. However, the explicit modeling of IP/MPLS over OTN over DWDM in which the OTN layer's technological constraints are specifically considered has not been investigated before. In this paper, the authors present an optimization design model for protecting an IP/MPLS over OTN over DWDM three-layer network. While considering the technological constraints of each layer, they provide a protection mechanism at each layer that guarantees the multilayer network survivability when three links fail simultaneously where each layer suffers a single failure.