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      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
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      Regenerator placement and traffic engineering with restoration in GMPLS networks

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      Author
      Yetginer, E.
      Karasan, E.
      Date
      2003
      Source Title
      Photonic Network Communications
      Print ISSN
      1387-974X
      Publisher
      Springer
      Volume
      6
      Issue
      2
      Pages
      139 - 149
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      In this paper, we study regenerator placement and traffic engineering of restorable paths in generalized multiprotocol label switching (GMPLS) networks. Regenerators are necessary in optical networks in order to cope with transmission impairments. We study a network architecture where regenerators are placed only at selected nodes for decreasing cost of regeneration. We propose two heuristic algorithms for optimum placement of these regenerators. Performances of these algorithms in terms of required number of regenerators and computational complexity are evaluated. In this network architecture with sparse regeneration, off-line computation of working and restoration paths is studied for traffic engineering with path rerouting as the restoration scheme. We study two approaches for selecting working and restoration paths from a set of candidate paths and formulate each method as an integer linear programming (ILP) problem. A traffic uncertainty model is developed in order to compare these methods based on their robustness with respect to changing traffic patterns. Traffic engineering methods are compared based on number of additional demands resulting from traffic uncertainties that can be carried over the network. Proposed heuristic regenerator placement algorithms are also evaluated from a traffic engineering point of view.
      Keywords
      GMPLS
      Regenerator placement
      Restoration
      Traffic engineering
      Algorithms
      Computational complexity
      Constraint theory
      Heuristic methods
      Integer programming
      Interoperability
      Linear programming
      Multilayers
      Network protocols
      Photons
      Regenerators
      Switching
      Telecommunication traffic
      Topology
      Regenerator placement
      Traffic engineering
      Telecommunication networks
      Permalink
      http://hdl.handle.net/11693/24440
      Published Version (Please cite this version)
      http://dx.doi.org/10.1023/A:1024731113866
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      • Department of Electrical and Electronics Engineering 3650
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