Showing papers by "Miroslaw Klinkowski published in 2017"

Selection of spectral-spatial channels in SDM flexgrid optical networks

Abstract: Space division multiplexing (SDM) is a promising solution with the scaling potential to overcome the possible capacity crunch problem in optical backbone networks. The key idea behind SDM is to exploit the spatial dimension to provide a significant increase in the transmission system capacity. In SDM, optical signals are transmitted in parallel through spatial resources (fibers, cores or modes), thus co-propagating in the same optical fiber structure. The goal of this paper is twofold. First, we propose and evaluate several versions of a greedy algorithm for optimization of flexible-grid SDM optical networks, including comparison with optimization results yielded by the CPLEX solver. Second, using best found algorithm settings, we complement our study with an analysis of SDM network performance in terms of the spectrum usage. We report and discuss results of numerical experiments run on a representative network topology with realistic physical assumptions. The key observation is the low scalability of the CPLEX solver, while the greedy algorithm is capable of generating solutions for larger network scenarios. However, even the relatively simple heuristic experiences quite large execution times.

Performance analysis of flexible regeneration and modulation conversion in elastic optical networks

Abstract: We study potential performance gains resulting from deliberate use of signal regeneration along with modulation conversion in translucent elastic optical networks (EONs) realizing super-channel transmission.1

Influence of modulation format transmission reach on performance of elastic optical networks

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.

Spectrum usage for various SDM scenarios

Abstract: Space division multiplexing (SDM) seems to be a promising solution with the scaling potential to overcome the possible capacity crunch problem in optical backbone networks. The main goal of this paper is to provide a detailed analysis of three SDM scenarios, namely, SDM-Fixed, SDM-Single, and SDM-Flexible in terms of the spectrum usage and the wastage of spectral resources due to guardbands and resource overprovisioning.