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多态光突发交换(POBS)网络能够有效地支持多种同步和异步业务的传输,但是其异步突发业务的丢失率较相同网络环境下的传统OBS丢失率要高。如何有效地对多态OBS中异步突发进行合理调度,是降低异步突发丢失率的关键所在。提出了一种基于信道整理的调度算法,将已经成功调度的突发重新调度到最合适的数据信道,使得信道资源得到充分的利用,从而降低了异步突发的丢失率。仿真结果表明,该算法能很好地降低多态OBS网络中异步突发的丢失率。
The POBS network can effectively support the transmission of many kinds of synchronous and asynchronous services, but the loss rate of its asynchronous burst service is higher than the loss rate of traditional OBS in the same network environment. How to effectively schedule asynchronous burst in polymorphic OBS is the key to reduce the rate of loss of asynchronous burst. A scheduling algorithm based on channel arrangement is proposed. The already scheduled burst is rescheduled to the most suitable data channel so that channel resources can be fully used, which reduces the loss rate of asynchronous burst. Simulation results show that this algorithm can reduce the loss rate of asynchronous burst in multi-state OBS network well.