Wavelength Conversion in WDM Optical Networks: Strategies and Algorithms for Limiting the Number of Converters in the Optical Cross-Connects

摘要

This paper considers the problem of wavelength conversion in optical networks using wavelength division multiplexing technique. In the previous literature, two main wavelength routing and assignment strategies have been introduced: wavelength path (WP) and virtual Wavelength path (VWP), depending on whether the signal stays on the same wavelength or is converted to another during its travel throughout The network. While the former method does not require any wavelength conversion, the latter needs wavelength conversion in each optical node And, in particular, a wavelength converter per each signal handled by the node itself.