From opacity to transparency via translucent optical networks

➲ According to the state of the technology, above 2000 km range, only translucent networks with spare RR ares viable: concept of “island of Page 141 transparency” [source: A. Saleh, “Islands of transparency: an emerging reality in multi-wavelength optical networking,” IEEE/LEOS Summer Optical Meeting Broadband Optical Networks Technologies, 1998] ➲ The benefit of adding in a translucent network RRs above 20% of the number of RRs in the same but opaque network has a negligible benefit in terms of connection acceptance ratio [source: X. Yang, B. Ramamurthy, “Sparse regeneration in translucent wavelength-routed optical networks: architecture, network design and wavelength routing,” Photonic Network Communications, vol. 10, no. 1, pp. 39–50, 2005] ➲ The QWRP tool is one of the rare tools enabling to optimize RWA and regenerator placement under QoT impairments constraints ➲ The LERP module enables to optimize both the amount of required optical Page 142 channels and the amount of electrical RRs ➲ The BER-Predictor module is one of the few tools that consider simultaneously the impact of multiple physical layer impairments ➲ QWRP is scalable to real backbone networks ➲ It is one of the very rare hybrid WDM network planning tools that consider non-flat systems ➲ The RPCO2 tool is the first one to integrate CAPEX and OPEX objectives ➲ The impact of FWM in wavelength allocation will be considered in QWRP and RPCO2 tools