The resilience of WDM networks to probabilistic geographical failures


Journal Article

Telecommunications networks, and in particular optical WDM networks, are vulnerable to large-scale failures of their physical infrastructure, resulting from physical attacks (such as an Electromagnetic Pulse attack) or natural disasters (such as solar flares, earthquakes, and floods). Such events happen at specific geographical locations and disrupt specific parts of the network but their effects are not deterministic. Therefore, we provide a unified framework to model the network vulnerability when the event has a probabilistic nature, defined by an arbitrary probability density function. Our framework captures scenarios with a number of simultaneous attacks, in which network components consist of several dependent subcomponents, and in which either a 1+1 or a 1:1 protection plan is in place. We use computational geometric tools to provide efficient algorithms to identify vulnerable points within the network under various metrics. Then, we obtain numerical results for specific backbone networks, thereby demonstrating the applicability of our algorithms to real-world scenarios. Our novel approach allows for identifying locations which require additional protection efforts (e.g., equipment shielding). Overall, the paper demonstrates that using computational geometric techniques can significantly contribute to our understanding of network resilience. © 2011 IEEE.

Full Text

Duke Authors

Cited Authors

  • Agarwal, PK; Efrat, A; Ganjugunte, S; Hay, D; Sankararaman, S; Zussman, G

Published Date

  • August 2, 2011

Published In

Start / End Page

  • 1521 - 1529

International Standard Serial Number (ISSN)

  • 0743-166X

Digital Object Identifier (DOI)

  • 10.1109/INFCOM.2011.5934942

Citation Source

  • Scopus