  This paper addresses the transmission-aware transceiver allocation problem of
flexible optical networks for a multi-period planning. The proposed approach
aims at assigning the best configuration of bandwidth variable transceivers
(BVTRX) considering the amplifier noise and nonlinear channel interferences
using the incoherent Extended Gaussian Noise (EGN) model. The proposed solution
improves the network throughput and spectrum utilization in the early planning
periods and allocates lower number of BV-TRXs in later periods in comparison to
algorithms presented recently. A heuristic approach to regenerator placement
has also been applied achieving up to 25% transceiver and 50% spectrum
utilization savings in comparison to configurations without regenerators.
