TY - JOUR

T1 - Probabilistic Shared Risk Link Groups Modeling Correlated Resource Failures Caused by Disasters

AU - Vass, Balazs

AU - Tapolcai, Janos

AU - Heszberger, Zalan

AU - Biro, Jozsef

AU - Hay, David

AU - Kuipers, Fernando A.

AU - Oostenbrink, Jorik

AU - Valentini, Alessandro

AU - Ronyai, Lajos

N1 - Publisher Copyright:
© 1983-2012 IEEE.

PY - 2021/9

Y1 - 2021/9

N2 - To evaluate the expected availability of a backbone network service, the administrator should consider all possible failure scenarios under the specific service availability model stipulated in the corresponding service-level agreement. Given the increase in natural disasters and malicious attacks with geographically extensive impact, considering only independent single component failures is often insufficient. This paper builds a stochastic model of geographically correlated link failures caused by disasters to estimate the hazards an optical backbone network may be prone to and to understand the complex correlation between possible link failures. We first consider link failures only and later extend our model also to capture node failures. With such a model, one can quickly extract essential information such as the probability of an arbitrary set of network resources to fail simultaneously, the probability of two nodes to be disconnected, the probability of a path to survive a disaster. Furthermore, we introduce standard data structures and a unified terminology on Probabilistic Shared Risk Link Groups (PSRLGs), along with a pre-computation process, which represents the failure probability of a set of resources succinctly. In particular, we generate a quasilinear-sized data structure in polynomial time, which allows the efficient computation of the cumulative failure probability of any set of network elements. Our evaluation is based on carefully pre-processed seismic hazard data matched to real-world optical backbone network topologies.

AB - To evaluate the expected availability of a backbone network service, the administrator should consider all possible failure scenarios under the specific service availability model stipulated in the corresponding service-level agreement. Given the increase in natural disasters and malicious attacks with geographically extensive impact, considering only independent single component failures is often insufficient. This paper builds a stochastic model of geographically correlated link failures caused by disasters to estimate the hazards an optical backbone network may be prone to and to understand the complex correlation between possible link failures. We first consider link failures only and later extend our model also to capture node failures. With such a model, one can quickly extract essential information such as the probability of an arbitrary set of network resources to fail simultaneously, the probability of two nodes to be disconnected, the probability of a path to survive a disaster. Furthermore, we introduce standard data structures and a unified terminology on Probabilistic Shared Risk Link Groups (PSRLGs), along with a pre-computation process, which represents the failure probability of a set of resources succinctly. In particular, we generate a quasilinear-sized data structure in polynomial time, which allows the efficient computation of the cumulative failure probability of any set of network elements. Our evaluation is based on carefully pre-processed seismic hazard data matched to real-world optical backbone network topologies.

KW - Disaster resilience

KW - PSRLG enumeration

KW - Voronoi diagram

KW - network failure modeling

KW - probabilistic shared risk link groups

KW - seismic hazard

UR - http://www.scopus.com/inward/record.url?scp=85102629186&partnerID=8YFLogxK

U2 - 10.1109/JSAC.2021.3064652

DO - 10.1109/JSAC.2021.3064652

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AN - SCOPUS:85102629186

SN - 0733-8716

VL - 39

SP - 2672

EP - 2687

JO - IEEE Journal on Selected Areas in Communications

JF - IEEE Journal on Selected Areas in Communications

IS - 9

M1 - 9373653

ER -