Routing in wavelength-routed all-optical WDM networks has received much attention in the
past decade, for which fixed and dynamic routing methods have been proposed. Taking into
account the observation that wavelength-routed all-optical WDM networks are similar to
circuit-switched voice networks, except with regard to wavelength conversion, we propose
an adaptive alternate routing (AAR) scheme for wavelength-routed all-optical WDM
networks. A major benefit of AAR is that it can operate and adapt without requiring an�…