基于短包优先的动态阈值共享缓存管理策略的研究  

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

作　　者：许应新[1] 许都[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都611731

出　　处：《计算机应用研究》2011年第5期1805-1807,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(60872031);国家"863"计划资助项目(2008AA01A326)

摘　　要：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,提出了一种基于短包优先的动态阈值共享缓存管理策略(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DADT(dynamic algo-rithm with different thresholds)策略相比,SPBDT策略在多入多出交换设备中表现出更低的丢包率和流破坏率。To reduce the packet loss ratio and flow destroy ratio in the packet switching system with sharing buffer management,this paper proposed SPBDT,every packet sharing the same buffer.For SPBDT,used two dynamic thresholds for each queue.According to the contrast of the length and the threshold of the queue,it could decide whether receive the new packet or not.Compared with DADT,SPBDT policy has lower packet loss ratio and lower flow destroy ratio in the more inputs and more outputs switching equipment.

关 键 词：动态阈值 缓存管理 共享缓存 分组交换 丢包率 

分 类 号：TN915.41[电子电信—通信与信息系统]