Estimation Uncertainties in the Optical Signal-to-Noise Ratio Network Optimization

Fábio Durand, Guilherme M. Lopes, Amanda Spagolla, Taufik Abrão

Abstract


In this work, we investigate the effects of estimation uncertainties in the optimization of the optical signal-to-noise ratio (OSNR) at the wavelength division multiplexing (WDM) optical networks. The OSNR optimization increases the network throughput and energy efficiency and it enables to minimize the number of retransmissions by higher layers. The OSNR optimization algorithms are related with the optical channel estimation performed by the combinations of optical performance monitors (OPM) measurements, analytical models and simulations. Furthermore, the estimation uncertainties are introduced by several factors such as the availability of monitoring information, monitoring accuracy, imperfection of physical layer and dynamic of channel allocation. The main results have shown the relation between the uncertainties in the channel error estimation, normalized mean squared error (NMSE) and power penalty for an evaluated numerical example. The methodology developed could be utilized to determinate the maxim level of acceptable uncertainties in the channel error estimation according the power penalty permitted in the OSNR optimization.


Keywords


optical networks, optical signal noise ratio, uncertainties, optimization algorithm.

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References


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DOI: http://dx.doi.org/10.1590/2179-10742016v15i1448

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