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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: Keren Bergman and Vincent Chan
  • Vol. 1, Iss. 2 — Jul. 1, 2009
  • pp: A194–A204

Effects of Outdated Control Information in Control-Plane-Enabled Optical Networks With Path Protection

Massimo Tornatore, Fabio De Grandi, Raul Muñoz, Ricardo Martinez, Ramon Casellas, and Achille Pattavina  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 1, Issue 2, pp. A194-A204 (2009)
http://dx.doi.org/10.1364/JOCN.1.00A194


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Abstract

New signaling suites for a distributed control plane in wavelength division multiplexing (WDM) networks, such as generalized multiprotocol label switching (GMPLS) and automatic switched optical networks (ASON), allow one to cope with the increasing variability of traffic patterns to be suppor ted by operators by providing a means to dynamically set up and release connections. The dissemination of link-state information [usually provided by routing protocols such as open-shortest-path-first traffic engineering (OSPF-TE)] is essential in this kind of control-plane enabled network: in particular, this information has to be continuously updated to allow routing algorithms to efficiently carry out the path computation. Most of the studies on dynamic traffic routing tend to neglect the effect of delays in control-information distribution on routing performance: in particular, even when the control plane is considered as in testbeds, emulators, or some simulations, the analysis of the effects of control plane delays is limited to a small range of values, applicable to well-specified contexts. Applying a very general control-delay representation, we are able to provide a wide-range simulative study to quantify the effect of sig naling on routing performance, mainly by using the blocking probability metric. We are able to evaluate the effect of outdated information (1) for a wide interval of control delay values, (2) for a large set of routing scenarios, considering, e.g., unprotected, dedica ted, and shared path protection routing, and (3) quan tifying the different delay effects in the absence or in the presence of wavelength conversion capabilities.

© 2009 Optical Society of America

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4253) Fiber optics and optical communications : Networks, circuit-switched

ToC Category:
Optical Networks for the Future Internet

History
Original Manuscript: October 27, 2008
Revised Manuscript: January 16, 2009
Manuscript Accepted: April 13, 2009
Published: July 1, 2009

Virtual Issues
Optical Networks for the Future Internet (2009) Journal of Optical Networking

Citation
Massimo Tornatore, Fabio De Grandi, Raul Muñoz, Ricardo Martinez, Ramon Casellas, and Achille Pattavina, "Effects of Outdated Control Information in Control-Plane-Enabled Optical Networks With Path Protection," J. Opt. Commun. Netw. 1, A194-A204 (2009)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-1-2-A194


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