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Author Tarifeno-Gajardo, M.; Beghelli, A.; Moreno, E.
Title Availability-Driven Optimal Design of Shared Path Protection in WDM Networks Type
Year 2016 Publication Networks Abbreviated Journal Networks
Volume 68 Issue 3 Pages 224-237
Keywords optical networks; shared path protection; prioritized shared protection; availability-guarantees; integer linear programming; heuristic; wavelength division multiplexing networks
Abstract Availability, defined as the fraction of time a network service is operative, is a key network service parameter. Dedicated protection increases availability but also the cost. Shared protection instead decreases the cost, but also the availability. In this article, we formulate and solve an integer linear programming (ILP) model for the problem of minimizing the backup resources required by a shared-protected static optical network whilst guaranteeing an availability target per connection. The main research challenge is dealing with the nonlinear expression for the availability constraint. Taking the working/backup routes and the availability requirements as input data, the ILP model identifies the set of connections sharing backup resources in any given network link. We also propose a greedy heuristic to solve large instances in much shorter time than the ILP model with low levels of relative error (2.49% average error in the instances studied) and modify the ILP model to evaluate the impact of wavelength conversion. Results show that considering availability requirements can lead up to 56.4% higher backup resource requirements than not considering them at all, highlighting the importance of availability requirements in budget estimation. (C) 2016 Wiley Periodicals, Inc.
Address [Tarifeno-Gajardo, Marco] Univ Tecn Federico Santa Maria, Dept Elect Engn, Valparaiso, Chile, Email: marco.tarifeno@postgrado.usm.cl
Corporate Author Thesis
Publisher Wiley-Blackwell Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0028-3045 ISBN Medium
Area Expedition Conference
Notes WOS:000388289300005 Approved
Call Number UAI @ eduardo.moreno @ Serial 678
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