Fault/Attack Tolerant Recovery Mechanism Under SRLG Constraint in the Next Generation Optical VPN

Hwang, Jinho; Shin, Ju-Dong; Yun, Mira; Kim, Jeong-Nyeo; Lee, Sang Su; Kim, Sung Un

doi:10.1007/978-3-540-30197-4_39

Cited by 3 publications

(1 citation statement)

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“…Third, a self-adaptive implementation of partitioning provides auto-isolation of failures [14]. It reduces management cost, which constitutes at least half of the operating cost of optical networks [15,16].…”

Section: B Distributed and Dynamic Self-organizationmentioning

confidence: 99%

k-Connected Network Partitioning Under Shared Risk Link Groups

Hasan

Farahmand

Jue

2015

J. Opt. Commun. Netw.

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Partitioning a large network into a connected hierarchy is a proven technique for scalability and manageability. Although a significant body of work is devoted to this area of interest, a reference to survivable hierarchical networks where each partition remains k-connected is missing (k ≥ 2). A k-connected partition ensures functional network organization even after any k − 1 failures occur. In optical networks, a failure of a physical component (e.g., a cable or line-card) disrupts multiple logical links that share the component. Such a shared risk link group (SRLG) failure is more common than a single link or node failure in the logical topology. Hence, we study the significance of a k-SRLG-connected (kSC) partitioning problem for optical networks. For a given network, we show that finding 2-SRLG-connected (2SC) partitioning, the simplest case, is NP-complete. We provide mathematical formulations and propose a distributed-scalable heuristic solution. We also solve 2SC partitioning with flexible mapping onto the physical topology, where lightpaths can be added to guarantee a solution. Simulation results verify that the kSC partitioning scheme performs better than traditional 1-connected partitioning schemes with regard to system survivability, stability, and repartitioning overhead.

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Section: B Distributed and Dynamic Self-organizationmentioning

confidence: 99%