Soft Computing Approaches to Routing and Wavelength Assignment in Wavelength-Routed Optical Networks

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Title: Soft Computing Approaches to Routing and Wavelength Assignment in Wavelength-Routed Optical Networks
Author: Lea, Djuana
Advisors: Dr. Henry Nuttle, Committee Member
Dr. Elmor Peterson, Committee Member
Dr. Salah Elmaghraby, Committee Member
Dr. Shu-Cherng Fang, Committee Chair
Abstract: The routing and wavelength assignment (RWA) problem is essential for achieving efficient performance in wavelength-routed optical networks. For a network without wavelength conversion capabilities, the RWA problem consists of selecting an appropriate path and wavelength for each connection request while ensuring that paths that share common links are not assigned the same wavelength. The purpose of this research is to develop efficient adaptive methods for routing and wavelength assignment in wavelength-routed optical networks with dynamic traffic. The proposed methods utilize soft computing techniques including genetic algorithms, fuzzy control theory, simulated annealing, and tabu search. All four algorithms consider the current availability of network resources before making a routing decision. Simulations for each algorithm show that each method outperforms fixed and alternate routing strategies. The fuzzy-controlled algorithm achieved the lowest blocking rates and the shortest running times in most cases.
Date: 2005-02-28
Degree: PhD
Discipline: Operations Research
URI: http://www.lib.ncsu.edu/resolver/1840.16/5955


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