基于单程时间的丢包率估计算法  

Packet loss rate estimation algorithm based on one trip time

作　　者：孟凡凡[1] 王东[1] 唐艳芬[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《计算机工程与应用》2007年第9期139-141,180,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(the National Natural Science Foundation of China under Grant No.60273070)。

摘　　要：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。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.

关 键 词：累积方式的显式传输错误通告 TCP性能 单程时间 出错率 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]