基于短包优先的动态阈值共享缓存管理策略的研究*

为了减小共享缓存管理分组交换系统的丢包率和流破坏率，本文提出了一种基于短包优先的动态阈值共享缓存管理策Sharing Buffer Managing Strategy of Dynamic Threshold Based on Short-Packet First（SPBDT）,交换设备中，所有分组共享同一缓存区。SPBDT策略的主要思想是用两个动态的门限控制缓存区中输出队列的长度，根据当前队列长度与当前门限的比较来判断新到达的包是接纳还是丢弃。仿真结果表明，与Dynamic Algorithm with Different Thresholds (DADT)策略相比，SPBDT策略在多入多出交换设备中体现了更低的丢包率和流破坏率。

Research on sharing buffer managing strategy of dynamic threshold based on short-packet first

To reduce the packet loss ratio and flow destroy ratio in the packet switching system with sharing buffer management, this paper proposes Sharing Buffer Managing Strategy of Dynamic Threshold Based on Short-Packet First, every packet sharing the same buffer. For SPBDT, we use two dynamic thresholds for each queue. According to the contrast of the length and the threshold of the queue, we could decide whether receive the new packet or not. Compare with DADT, SPBDT policy has lower packet loss ratio and lower flow destroy ratio in the more inputs and more outputs switching equipment.