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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. 4 — Apr. 1, 2010
  • pp: 196–205

Routing and Wavelength Assignment Problem in PCE-Based Wavelength-Switched Optical Networks

Yongli Zhao, Jie Zhang, Yuefeng Ji, and Wanyi Gu  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 2, Issue 4, pp. 196-205 (2010)
http://dx.doi.org/10.1364/JOCN.2.000196


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Abstract

As a key problem in wavelength-switched optical networks (WSONs), in which wavelengths are the most important resources, the routing and wavelength assignment (RWA) problem has been researched extensively. Due to the advantages of path computation in multilayer and multidomain networks, especially in multiconstraint scenarios, the path computation element (PCE) has been introduced into WSONs, which provides a better approach to the solution of the RWA problem in WSONs. This paper focuses on the RWA problem in PCE-based WSONs. A PCE-based routing framework and two PCE-based routing models are first designed, and then two distributed resource reservation schemes based on forward reservation protocol (FRP) and backward reservation protocol (BRP) are proposed and simulated in a PCE-based WSON. Finally, eight PCE-based RWA schemes are proposed in WSONs, the performances of which have been investigated and validated using the discrete event simulation tool OMNeT++. Numeric results show that the RWA (first-fit) scheme has the best performance in terms of blocking probability and average delay time.

© 2010 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: October 7, 2009
Revised Manuscript: March 1, 2010
Published: April 1, 2010

Citation
Yongli Zhao, Jie Zhang, Yuefeng Ji, and Wanyi Gu, "Routing and Wavelength Assignment Problem in PCE-Based Wavelength-Switched Optical Networks," J. Opt. Commun. Netw. 2, 196-205 (2010)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-2-4-196

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