Survivable Path Sets: A New Approach to Survivability in Multilayer Networks

Abstract

Abstract-We consider the problem of survivability in multilayer networks. In single-layer networks, a pair of disjoint paths can be used to provide protection for a source-destination pair. However, this approach cannot be directly applied to layered networks where risk-disjoint paths may not always exist. In this paper, we take a new approach which is based on finding a set of paths that may not be disjoint but together will survive any single risk. We start with two-layered communication networks where the risks are fiber failures. We prove that in general, finding the minimum survivable path set (MSPS) is NP-hard, whereas if we restrict the length of paths the problem can be solved in polynomial time. We formulate the problem as an Integer Linear Program (ILP), and use this formulation to develop heuristics and approximation algorithms. Moreover, we study the minimum cost survivable path set problem where the cost is the number of fibers used and thus non-additive.Finally, we generalize the survivability problem to the networks with more than two layers. By applying our algorithms for survivable path set, we assess the survivability of communication networks that operate relying on power from a power grid.

Estimating the Survivability Impact of Multi-Fiber Wavelength-Division Multiplexing Networks

“…The hybrid methodology of FAHP gives the weight of the factors. The FTOPSIS gives the absolute ranking of the factors with respect to the present attributes [20][21][22][23][24]. The fuzzy approach of the following methodology has been used in WDM:…”

“…FTOPSIS ranks the factors and their alternatives. The developers have a set of factors from which they need to select the particular factors that determine survivability in WDM [24][25][26]. This process calls for judicious decision making as the developers have to select the factors of the highest preference for different criteria.…”

Cascading-failure-resilient interconnection for interdependent power grid - Optical network

“…Previous works analyzed the robustness of interdependent networks, e.g., determining the fraction of nodes whose removal will cause a complete blackout in the networks [3] [7] [8] [9]. The authors in [10] proposed a load control scheme mine under which topological conditions, i.e., dense vs sparse networks, the two strategies are more effective.…”

Survivable Cloud Network Design Against Multiple Failures Through Protecting Spanning Trees

“…Here SRLG means a group of network links routed through the same fiber, thus the fiber cut causes simultaneous failures to this group of links. Jaumard et al [31] and Parandehgheibi et al [32] proposed the use of minimal path sets for survivable routing after single link failure. Xi et al [33] considered rerouting as a restoration scheme to recover SRLG failures in IP-over-WDM networks.…”