Optimization of strict-sense nonblocking wavelength-space-wavelength elastic optical switching fabrics

Abstract

The paper considers the optimization of strict-sense nonblocking three-stage wavelength-space-wavelength switching fabrics for elastic optical switching nodes. Strict-sense nonblocking conditions for such switching fabrics have recently been presented. A brief analysis of the number of switches required to construct such fabrics was also presented in that paper. In this paper, we present a detailed estimation of the number of elements in these switching fabrics of different capacities. To find the switching fabric with the lowest number of switching elements, all possible configurations have been checked. Such an exhaustive search was possible, since the final parameters of the switching fabric of a given capacity were found within less than a minute. The results obtained for networks of several capacities allow us to draw more general conclusions about the parameters of optimal switching fabrics.