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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 2, Iss. 11 — Nov. 1, 2010
  • pp: 915–927

Dynamic Impairment-Aware RWA in Multifiber Wavelength-Routed All-Optical Networks Supporting Class-Based Traffic

Akbar Ghaffar Pour Rahbar  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 2, Issue 11, pp. 915-927 (2010)
http://dx.doi.org/10.1364/JOCN.2.000915


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Abstract

A quality-of-transmission- (QoT-) aware routing and wavelength assignment (RWA) technique suitable for multifiber wavelength-routed all-optical networks supporting class-based lightpaths (LPs) is proposed, where QoT is evaluated not only for any candidate LP being set up but also for already-set-up LPs. In this paper, QoT refers to the quality of transmission at the physical layer and quality of service (QoS) refers to the network-level quality issues. Four performance improvement techniques are proposed: (1) preempting an existing low-quality (LQ) LP by a high-quality (HQ) connection considering bandwidth utilization to provide better QoS for HQ traffic; (2) class-based buffering of connection requests in edge switches to provide the chance of setup for the LPs that are going to be blocked, and therefore, improving the performance of the LP setup; (3) differentiated routing in which LQ LPs are routed through large dispersion paths and HQ LPs through small dispersion paths; and (4) wavelength ordering to reduce crosstalk in switches and interchannel crosstalk on fibers. Our performance evaluations show the effectiveness of the proposed improvements in reducing blocking probability.

© 2010 Optical Society of America

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(060.4253) Fiber optics and optical communications : Networks, circuit-switched

ToC Category:
Research Papers

History
Original Manuscript: March 9, 2010
Manuscript Accepted: August 12, 2010
Published: October 20, 2010

Citation
Akbar Ghaffar Pour Rahbar, "Dynamic Impairment-Aware RWA in Multifiber Wavelength-Routed All-Optical Networks Supporting Class-Based Traffic," J. Opt. Commun. Netw. 2, 915-927 (2010)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-2-11-915

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