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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 6 — Jun. 1, 2013
  • pp: 658–666

Collision-Aware Routing and Spectrum Assignment in GMPLS-Enabled Flexible-Bandwidth Optical Network

Bingli Guo, Juhao Li, Yan Wang, Shanguo Huang, Zhangyuan Chen, and Yongqi He  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 5, Issue 6, pp. 658-666 (2013)
http://dx.doi.org/10.1364/JOCN.5.000658


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Abstract

In a flexible-bandwidth optical network (FBON) with a generalized multiprotocol label switching control plane, the resource reservation protocol with traffic engineering extensions (RSVP-TE) is employed to establish end-to-end bandwidth variable lightpaths. The resource reservation can be blocked due to spectrum contention of different concurrent RSVP instances (called backward blocking), and it is the predominant blocking contribution when traffic load is low and arrival highly dynamic. Also, due to its flexible traffic granularity in FBON, the backward collision would happen more frequently and the collision scenario would be more complicated than that in wavelength-routed networking; thus the need for a collision evaluation and avoiding method. So, a collision-avoiding routing with maximum available spectrum allocation (SA) options and an SA scheme to search the spectrum segment with minimum collision possibility are proposed for backward blocking reduction, as well as an extension to the RSVP-TE. Simulation results show that the proposed algorithm could achieve better blocking performance through significantly reducing the backward reservation collision but with acceptable forward blocking deterioration. At the same time, with the proposed algorithm, different granularity traffic could be served more fairly in FBON.

© 2013 Optical Society of America

OCIS Codes
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(060.4264) Fiber optics and optical communications : Networks, wavelength assignment

ToC Category:
Research Papers

History
Original Manuscript: April 20, 2013
Revised Manuscript: April 20, 2013
Manuscript Accepted: April 24, 2013
Published: May 31, 2013

Citation
Bingli Guo, Juhao Li, Yan Wang, Shanguo Huang, Zhangyuan Chen, and Yongqi He, "Collision-Aware Routing and Spectrum Assignment in GMPLS-Enabled Flexible-Bandwidth Optical Network," J. Opt. Commun. Netw. 5, 658-666 (2013)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-5-6-658

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