Szilárd Zsigmond, Marcell Perényi, Tibor Cinkler
OSNR based routing in WDM optical networks
In this paper we propose new physical impairments based routing and wavelength assignment (ICBR) methods where the control plane has influence on the signal power of the Wavelength Division Multiplexed (WDM) channels in metro-optical networks. We give the exact integer linear programming (ILP) formulation of the method. Nowadays in nearly all kinds of reconfigurable optical add-drop multiplexers (ROADM) the signal power can be tuned via variable optical attenuators (VOA) from the control plane. The proposed algorithm can be used in existing WDM optical networks where the nodes support signal power tuning. The proposed method outperforms the traditional existing schemes.