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We propose an all-optical converter placement/wavelength assignment scheme to improve network utilization under practical constraints such as input wavelengths and cascadability. We show doubling of utilization compared to no conversion and 70% reduction in converters over OEO.
We jointly consider problems of virtual network mapping and routing and wavelength assignment in WDM networks. Flexible virtual node mapping enabled by network virtualization achieves significant optical network resource savings compared to fixed node mapping.
We show that blocking in dynamic networks of colorless, non-directional ROADMs is tolerant to intra-node contention when contention-aware routing/wavelength assignment (RWA) algorithms are used. An optional client-side cross-connect enables low blocking with simpler RWA variants.
We present a heuristic algorithm to address the demand aggregation problem in DWDM optical networks employing shared ring protection. The algorithm decides the route and wavelength of each demand with the aim of minimizing the total number of optical line cards as well as reducing the total number of DWDM rings.
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