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On optimization of optical packet switches with reconfiguration overhead

Optical packet switching is one of the most promising technologies for carrying EP traffic over WDM optical networks. For optical packet switch (OPS) design, due to the reconfiguration overhead in the switch fabric, packet delay and speedup are two key factors to be considered. Existing scheduling algorithms, DOUBLE [B. Towles and W.J. Dally, Oct 2003] and ADAPTIVE [Bin Wu and K.L. Leung, Dec 2004], make effective tradeoff between these two factors. In this paper, we show that the performance of both DOUBLE and ADAPTIVE, as well as their underlying OPS switch architecture, can be further optimized. Our proposed solutions are shown to effectively reduce both speedup and packet delay at the same time without incurring any extra cost.