In a network scenario, wavelength divisionmultiplexing
channels are added and dropped leading to fluctuations
on the network traffic loads along the optical path.
In this work, a comparison between the optical signal-to-noise
ratio (OSNR) predictions of the recently proposed closed-form
generalized Gaussian noise (GGN) model and a closed-form
Gaussian noise (GN) model that does not take into account the
stimulated Raman scattering (SRS) is performed, for different
network traffic loads and spectral occupancy over the entire C+L
band. In all results obtained, the maximum difference between
the OSNR predictions of GN (without SRS) and GGN models
closed forms is below 0.7 dB at optimum OSNR and maximum
C+L band occupancy. For channel launch powers higher than
the optimum, the OSNR differences increase up to 3 dB.