Rescheduling-based QoS control algorithms for optical burst switching

Optical burst switching (OBS) was proposed as a scheme to switch bursty traffic on optical switches. However, due to the lack of optical RAM, the provision of QoS with OBS is an open issue. In this paper, we are the first to propose and demonstrate a practical QoS scheduling algorithm for IP/WDM networks based on OBS. We show that, by adopting a carefully designed rescheduling scheme using delayed preemption and controlled deadlines, we archive the goal of providing differentiated services without degrading the system performance.