Link availability mapping in infrastructure-based overlay networks

Abstract

Core networks are increasingly supporting overlay networks on top of an IP-WDM network. As network reliability is a growing concern, a major challenge in the survivable layered network design is the crosslayer survivable mapping problem that deals with QoS parameters such as availability, lightpath length, and many others. This work directly studies this problem and proposes matrix formulations of the -hard mapping problem, giving a detailed insight into the structure of the layered network as well as relationships between and among links, and some potential mapping extensions. Numerical experiments show availability gains at no expense, occasionally, to the routing cost.

Resilient network design: challenges and future directions

“…In [29] sufficient conditions for elimination of backhaul in multi-layer network crosslayer survivable mapping were given and the model of [22] was extended to a three-layer context. In [32] we extended the cross-layer survivable mapping optimization problem to maximize the overlay network availability given the physical layer link and node availability information. It was shown that survivable mappings of higher layer virtual links can result in much different network availabilities even for the same cost.…”