Towards hitless reconfiguration in WDM optical networks for ATM transport

This paper proposes a methodology for reconfiguring a wavelength division multiplexed (WDM) optical network to adapt to changing traffic requirements at the ATM layer. The ATM network layer is reconfigured to adapt to changes in traffic patterns. These changing ATM network topologies or connectivities are known and are used to design the network. The proposed method sizes the ATM switches and then assigns wavelengths between pairs of ports so as to support the required ATM network topologies and their reconfiguration in a hitless manner