基于单程时间的丢包率估计算法

对于无线网络,信道的高误码率和节点移动等会导致丢包,多路径路由和节点移动切换等会导致乱序。由于传统的拥塞控制机制没有考虑由于非拥塞因素和乱序引起的丢包,会把非拥塞包丢失和乱序也当作网络拥塞标志,从而错误地进入拥塞控制,这将严重影响TCP性能。无线网中,可以采用累积方式的显示传输错误通告(Cumulative Explicit Transport Error Notification)机制来提高TCP的性能。针对CETEN需要路由器支持这一缺点进行了改进,在接收方估计丢包率。试验仿真结果表明这种方法的有效性。

Packet loss rate estimation algorithm based on one trip time

In wireless link,Packet loss may caused by the high channel bit error rate and nodes mobile,and multi-path routing and node switching will lead to reorder.The traditional congestion control mechanism is not consider to packet loss because of non-congestion factor and reorder,it takes the non-congestion and reorder for congestion,and switches to the congestion control state.This will affect the performance of TCP seriously.In wireless net,Cumulative Explicit Transport Error Notification Scheme is used to improve the TCP performance.This paper in view of the shortcoming of CETEN(Cumulative Explicit Transport Error Notification) to make the improvement,in receiver side estimates drop rate.The method is showed efficient in experiment.