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Wavelength Assignment Optimization in SDH over WDM Rings  

Chung, Jibok (Electronics and Telecommunications Research Institute)
Lee, Heesang (Department of Industrial Engineering, Hankuk University of Foreign Studies)
Han, ChiMoon (Department of Electronic Engineering, Hankuk University of Foreign Studies)
Publication Information
Management Science and Financial Engineering / v.9, no.1, 2003 , pp. 11-27 More about this Journal
Abstract
In this study, we propose a mathematical model based on the graph theory for the wavelength assignment problem arising in the design of SDH (Synchronous Digital Hierarchy) over WDM (Wavelength Division Multiplexing) ring networks. We propose a branch- and -price algorithm to solve the suggested models effectively within reasonable time in realistic SDH over WDM ring networks. By exploiting the structure of ring networks, we developed a polynomial time algorithm for efficient column generation and a branching rule that conserves the structure of column generation. In a computer simulation study, the suggested approach can find the optimal solutions within reasonable time and show better performance than the existing heuristics.
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