高速网中一种改进的选择报文丢弃策略

An Improved Selective Discarding Policy in High-Speed Networks

1引言高速网络应用程序产生的报文在传输时往往被分成较小的包(或分组),只有当组成一个报文的所有包都成功地到达时,该报文才是可用的.因而,在流量控制和拥塞控制策略中,必须采用基于报文的确认与重传机制,选择合适的包进行丢弃并使尽可能多的报文成功地被传送.

In this paper,an improved selective discarding policy called threshold-based partial message discarding (TPMD) policy is presented,which can adapt the varied load. The TPMD policy can change dynamically with the occupancy of the buffer between the PMD policy and the EMD policy. Numerical result shows the network performance under the TPMD policy get good performance under various network loads.