On the Efficient Dynamic Routing in Spectrally-Spatially Flexible Optical Networks

Abstract

In this paper we focus on the efficient dynamic routing in spectrally-spatially flexible optical networks (SS-FON). To this end, we propose novel adaptive spectral-spatial allocation (ASSA) algorithm supported by high load spectral-spatial allocation (HLSSA) mechanism. The main principle of the ASSA/HLSSA is to allow for demand allocation using spectral-spatial channels only in the case of high network load while prioritizing channels using lowest possible number of spatial modes. Then, we evaluate efficiency of the proposed approach by means of extensive numerical experiments. The results show its high efficiency especially for sets of relatively big demands and in a survivable network (in that case protected by dedicated path protection). According to the experiments, the methods allow to reduce bandwidth blocking probability up to 5.5% comparing to the allocation without their application.