Multihop packet scheduling in WDM/TDM networks with nonnegligible transceiver tuning times

This paper addresses the design of packet transmission schedules in photoni c slotted wavelength-division multiplexing/time-division multiplexing broad cast-and-select networks with W wavelengths and N nodes, Nodes are equipped with one tunable-wavelength transmitter with nonnegligible tuning times an d one fixed-wavelength receiver, A new scheduling algorithm that exploits m ultihop packet transfer to shorten the duration of scheduling periods is fi rst proposed, A single-hop scheduling :algorithm that performs slightly bet ter than previous proposals is then described, A simulation-based analysis of the two-algorithms shows that they jointly lead to significant improveme nts in both throughput and delay with respect to previous single-hop schedu les.