Multiple BHPs Delayed Scheduling Algorithm in Optical Burst Switching Network

Optical Burst Switching (OBS) is considered as one of core technologies for next generation optical switching networks. In OBS network, the scheduling algorithm for core router is important for the performance of switching network. And how to schedule bursts efficientlly and reduce the lost probability of bursts are the key issue. This paper proposes a new multiple BHPs (Burst Header Packets) delayed scheduling algorithm. With this algorithm, data bursts of all BHPs collected in one collection period are schedued collectively to a policy. And resources has been arranged before for the former BHP can be altered and rearranged by the latter one, and the scheduling result is optimized. In the light of different network application, this algorithm is divided into four realities. Through simulation and comparing the results with now existing algorithms, it is showed that the algorithm can optimize the scheduling of bursts, improve the channel utilization and decrease the loss possibility of bursts.