The Relative Utility of Three Optical Network Properties in Future Dynamic Optical Networks

M. MacGregor, D. Stamatelakis, and R. Iraschko (Canada)


network planning, dilation, tunability, wavelength conversion


This study examines the relative benefits of wavelength dilation, tunability and wavelength conversion in reducing the level of blocking in a dynamic optical transport network. Dilation is shown to be a necessary property of the network, in order to allow for express traffic through nodes. Network dilation is defined numerically in terms of the average hop length of demands, the maximum number of interfaces at a node, and the number of wavelengths in the transport system. Tunability and dilation are complementary properties, dilation being required for tunability to be useful. Systems with tunable endpoints will be very useful in reducing provisioning delays in dynamic transport networks, and the benefit of having both transmitters and receivers tunable is significant. Finally, wavelength conversion has been studied previously as a method for removing the wavelength continuity constraint. The results in this study show that tunability results in a much larger reduction of blocking than wavelength conversion.

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