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Proceedings Paper

Fiber-level p-cycles with cable-disjoint optimal design for survivable mesh WDM networks
Author(s): Hongfang Yu; Dongling Wu; Sheng Wang; Lemin Li
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Paper Abstract

P-cycle based protection has been proved to be an effective way for WDM networks’ survivability design, summed up by the notion of “ring like speed with mesh-like efficiency”. However, current p-cycles optimal design studies all ignore the protection switching cost. In fact, the cost of protection switching is a significant factor in the total cost to provide network survivability. Switching in aggregates (fiber or waveband) can significantly reduce the number of spare switch ports. In this paper, we consider that network protection is implemented at the whole-fiber level not at the wavelength level to reduce protection switching cost. Further, we address the issue about the joint optimization design of the working path routes with fiber-level p-cycle placement, and develop an improved ILP formulation. While to reduce the complexity of joint optimization problem, the simple process of pre-selecting candidate p-cycles by the efficiency and length metric and pre-selecting candidate working path routes by the hop metric is used. For a case study of COST239 network, we compare the fiber-level p-cycles optimal design with the wavelength-level p-cycles optimal design in terms of the switching cost and the required spare capacity.

Paper Details

Date Published: 8 February 2005
PDF: 6 pages
Proc. SPIE 5626, Network Architectures, Management, and Applications II, (8 February 2005); doi: 10.1117/12.576300
Show Author Affiliations
Hongfang Yu, Univ. of Electronic Science and Technology of China (China)
Dongling Wu, Univ. of Electronic Science and Technology of China (China)
Sheng Wang, Univ. of Electronic Science and Technology of China (China)
Lemin Li, Univ. of Electronic Science and Technology of China (China)

Published in SPIE Proceedings Vol. 5626:
Network Architectures, Management, and Applications II
S. J. Ben Yoo; Gee-Kung Chang; Guangcheng Li; Kwok-wai Cheung, Editor(s)

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