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Proceedings Paper

Dynamic routing based on local information in wavelength-routed WDM networks
Author(s): Yonghua Zhu; Rujian Lin
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Paper Abstract

We consider the problem of routing and wavelength assignment problem (RWA) in wavelength-routed networks, which consists of the Wavelength Division Multiplexers (WDM) and optical cross-connect (OXCs) devices interconnected via point-to-point WDM links. Assume that none of the OXCs has wavelength conversion capability. In this paper, we develop a set of dynamic distributed source-based DLE algorithms to provide primary and backup paths for connection requests with protection guarantee under single-link failures with local information. For better resource utilization, we employ multiplexing techniques, named primary backup multiplexing, to maximize the wavelength sharing among independent protection lightpaths. This technique allows a wavelength channel to be shared by a primary and one or more backup paths. We formulate the problem in link-based restoration context. The algorithm support on-demand path computation. Another main contribution is the introduction of the light-weight aggregated link metrics termed "barrel", we provide guidance to construct the protection routes with minimal wavelength consumption. We also compare the performance of various routing algorithms through simulation studies.

Paper Details

Date Published: 11 February 2005
PDF: 11 pages
Proc. SPIE 5625, Optical Transmission, Switching, and Subsystems II, (11 February 2005);
Show Author Affiliations
Yonghua Zhu, Shanghai Univ. (China)
Rujian Lin, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 5625:
Optical Transmission, Switching, and Subsystems II
Cedric F. Lam; Wanyi Gu; Norbert Hanik; Kimio Oguchi, Editor(s)

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