摘要： Today’s multi-domain optical network (MDON) suffer resource unavailability crisis due to the ever increasing multi-media application based scheduled traffic (ST). In optical networks, the ST demands are referred as scheduled lightpath demands (SLDs). Thus, there is the pressing need to allocate resources efficiently throughout the network. In line of this, we present a wavelength indexing based end-to-end routing (WIR) strategy in MDON under SLD. As per the strategy, the demands are first sorted in increasing order of their holding time. For routing and wavelength assignment (RWA), the wavelength selection gets priority over the route selection. Corresponding to each wavelength, the shortest route from among the available K predefined candidate routes is assigned. The simulation results demonstrate improvement in the blocking probability and resource utilization with respect to the conventional RWA techniques named as scheduling based RWA (S-RWA) and greedy-RWA (G-RWA). The proposed strategy also improves the acceptance of intra- and inter-domain demands in MDONs.