Investigation of dynamic routing and spectrum allocation methods in elastic optical networks
Abstract
The introduction of flexible frequency grids and advanced modulation techniques to optical transmission, namely an elastic optical network, requires new routing and spectrum allocation techniques. In this paper, we investigate dynamic two-step routing and spectrum allocation (RSA) methods for elastic optical networks. K-shortest path-based methods as well as spectrum allocation methods are analysed and discussed. Experimental verified of the investigated techniques is provided using simulation software. Based on the obtained experimental results, it can be seen that effectiveness of routing and spectrum allocation methods depend on network topologies. Moreover, performance of shortest path first methods improves considerably when a number of candidate paths increases in a topology with high nodal degree.References
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