Dynamic spectrum allocation based on connection alignment for elastic optical networks

To deal with exponential traffic growth, Elastic Optical Networks (EONs) are necessary because they enable to provide large capacity transmissions. In EONs, multiple widths of spectra are assigned to optical paths. Therefore, fragmentation in frequency domain degrades network performance. We propose a spectrum allocation method to reduce blocking probability and node costs, especially in spatially and spectrally elastic all-optical networks. This paper demonstrates the connection alignment that classifies frequency slots into several prioritized areas.