共享式光缓存中的控制策略

Control Strategy in Shared Optical Buffers

在光分组交换(OPS)节点结构中,由光纤延迟线(FDL)所构成的光缓存是解决光分组冲突的一种非常有效的方法。对于共享式FDL光缓存,由于FDL竞争的出现会导致光缓存性能的恶化。为了有效利用光缓存,需要对光缓存资源的分配进行有效的控制。为此,针对共享式FDL光缓存,提出一种有效的光缓存控制策略,即有限贪婪模式(limited greedy mode,LGM)缓存控制策略。使用仿真实验的方法对LGM的性能进行了评估。

In optical packet switch, optical buffer, which is composed of fiber delay line （FDL） ,is an effective way to resolve optical packet contentions. The performance deterioration of shared optical buffers results from FDL contention. In order to improve the efficiency of optical buffer,it necessitates to control effectively the resource distribution of optical buffer. A novel optical buffer control strategy, i. e. ,limited greedy mode （LGM）,is proposed for shared optical buffer. The performances of LGM are evaluated by simulation experiments.