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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 4, Iss. 6 — Jun. 1, 2012
  • pp: 436–448

A Dynamic Path-Computation Algorithm for a GMPLS-Enabled Multi-layer Network

Anica Bukva, Ramon Casellas, Ricardo Martínez, and Raül Muñoz  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 4, Issue 6, pp. 436-448 (2012)
http://dx.doi.org/10.1364/JOCN.4.000436


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Abstract

In this paper, we propose a path-computation algorithm for a dynamic virtual network topology (VNT) configuration. We focus on a multi-layer network formed by a connection-oriented Ethernet over a wavelength-switched optical network under the framework of a unified generalized multi-protocol label-switching control plane. The algorithm chooses the route depending on the current state of the network resources, favoring the usage of virtual and forwarding adjacency (FA) traffic engineering (TE) links over a new lambda switching capability (LSC) label-switched path (LSP) establishment. The performance evaluation of the proposed algorithm is conducted through simulations according to three different operational scenarios for the VNT configuration: dynamic, in which all LSC LSPs are established and released dynamically, semi-dynamic, in which a set of FA LSC LSPs is pre-established and advertised by a routing protocol as FA TE links, and virtual, in which a set of FA TE links is pre-defined, but not established. Two different topologies are used: NSFNET and Pan-European. It is shown that the proposed algorithm significantly reduces the connection-blocking probability compared to the algorithms found in the literature, providing an efficient collaboration between the switching layers involved.

© 2012 OSA

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms

ToC Category:
Research Papers

History
Original Manuscript: January 23, 2012
Revised Manuscript: April 16, 2012
Manuscript Accepted: April 16, 2012
Published: May 8, 2012

Citation
Anica Bukva, Ramon Casellas, Ricardo Martínez, and Raül Muñoz, "A Dynamic Path-Computation Algorithm for a GMPLS-Enabled Multi-layer Network," J. Opt. Commun. Netw. 4, 436-448 (2012)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-4-6-436

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