Abstract
Flexible-grid elastic optical networks (EONs) are expected to substitute in near future fixed-grid wavelength division multiplexing (WDM) optical networks. The previous works that were focused on optimization of EONs take many different assumptions regarding the transmission reach of modulation formats (MFs). However, according to the best of our knowledge, there have been no comparative analysis showing how the transmission reach models impact the network performance in terms of both spectrum and transceiver usage. In this paper, we address joint optimization of these two key resources in EONs. The main contribution of this work is a detailed analysis of the MF transmission reach impact on the spectrum consumption and transceiver usage in EONs. We present and discuss results of extensive numerical experiments run on representative network topologies with realistic physical assumptions considering various transmission reach values of the applied MFs.
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