多态OBS网络中基于信道整理的调度算法

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。

A Schedule Algorithm Based on Channel Arrangement in Polymorphous OBS

Polymorphous OBS (POBS) can effectively support the transmission of a variety of synchronous and asynchronous traffic. Compared with the traditional OBS network in the same environment, the asynchronous burst loss rate of polymorphous OBS is higher. Effectively scheduling the asynchronous burst in polymorphous OBS is the key to reduce burst loss rate. In this paper, a scheduling algorithm based on channel arrangement is proposed, for which, after algorithm is started, the successfully scheduled burst will be rescheduled to the most appropriate wavelength channel. In this way, the channel resource is effectively utilized and the asynchronous burst loss rate is reduced. The simulation results show that the proposed algorithm can effectively reduce the asynchronous burst loss rate of polymorphous OBS.