Multi-Layer Greenfield Re-Grooming with Wavelength Defragmentation

Flexible network design for multi-granular and quasi-dynamic traffic is important to minimize resource requirements. In the wavelength layer, wavelength blocking must also be reduced to achieve further cost reduction. We propose a novel traffic accommodation scheme based on repetitive Greenfield Re-grooming with Wavelength Defragmentation (GRWD), which is similar to storage-disk defragmentation. Numerical evaluation shows the required minimum number of sets of transport equipment for the proposed scheme.