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On the dimensioning of survivable optical metro/core networks with dual-homed access
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Optical Network Laboratory (ON Lab).ORCID iD: 0000-0001-5600-3700
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Optical Network Laboratory (ON Lab).ORCID iD: 0000-0002-5636-9910
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2016 (English)In: IEEE International Conference on High Performance Switching and Routing, HPSR, IEEE Computer Society, 2016, article id 7483089Conference paper, Published paper (Refereed)
Abstract [en]

Long-reach passive optical networks (LR-PONs) are able to effectively support the growing demand of traffic originating from residential and business customers. Failures of metro/core (M/C) nodes serving the traffic to/from the access networks covered by LR-PONs, may potentially affect hundreds or thousands of customers. One way of guaranteeing 100% survivability from single-node failures is to apply dual-homing, where each LR-PON is connected to two M/C nodes, and combine it with node-disjoint dedicated-path protection (DPP). In this paper, we present a new approach to provide network survivability against single M/C node failures. Instead of applying dedicated path protection (DPP) strategy, which can require huge amount of extra resources, we combine an unprotected network design with a dynamic multilayer restoration algorithm. Our aim is to determine a suitable amount of resource overbuild (in terms of extra transponders) needed to provide average connection availability close to that guaranteed by DPP. Preliminary results show that dimensioning for the worst-case scenario among a set of predefined M/C node failures, i.e., the one disrupting the highest number of connections, yields to a cost-effective strategy requiring up to 35% less transponders than DPP, while offering the same average connection availability.

Place, publisher, year, edition, pages
IEEE Computer Society, 2016. article id 7483089
Keywords [en]
Dual-homing, flat metro/core network, IP-over-WDM resilience schemes, LR-PON, traffic blocking and survivability
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-194551DOI: 10.1109/HPSR.2015.7483089Scopus ID: 2-s2.0-84978240423ISBN: 978-147999871-5 (print)OAI: oai:DiVA.org:kth-194551DiVA, id: diva2:1042526
Conference
16th IEEE International Conference on High Performance Switching and Routing, HPSR 2015, Budapest, Hungary, 30 June 2015 through 4 July 2015
Note

QC 20161031

Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2016-10-31Bibliographically approved

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Furdek, MarijaMonti, PaoloWosinska, Lena
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