Load-aware transparent reach maximization in flexible optical networks

Abstract

Abstract-We propose a novel load-aware powerselection strategy for maximizing the transparent reach in dispersion-uncompensated flexible optical networks with coherent modulation formats, and we quantify the savings in opto-electronic regenerations with respect to using the standard full-load transparent reach.

Regeneration savings in flexible optical networks with a new load-aware reach maximization

“…FWM is normally negligible in DU links [10]. Neglecting FWM, the NLI coefficient can be written as a NL = a SCI + a XCI (9) and in [16] we found that with rectangular spectra the SCI coefficient in the coherent GN model may be well approximated at large enough symbol rate/dispersion as:…”

“…In this paper, which is an extension of [9], we concentrate on the SB due to accumulation of linear and nonlinear optical impairments [1,3,[6][7][8]. The standard approach is to set-up only lightpaths whose physical length is below the full-load (FL) reach, i.e., the maximum length guaranteeing a received SNR above S 0 when all W wavelengths on all fibers are occupied.…”

Cross-layer optimization: Network cost vs. physical layer margins

“…However, in reality, the network is not fully congested and a relaxation in the worst-case assumptions and consequently in the margins taken into consideration can improve its performance [2]. Many efforts focus on the design of algorithms whose goal is to grant the lowest possible margins by configuring various parameters.…”