改进的基于带宽估计的Ad Hoc网拥塞控制策略研究  

Research of improved congestion control strategy based on bandwidth estimation in Ad Hoc networks

作　　者：胡宁静[1] 康忠毅[1] 向松[1] 

机构地区：[1]长沙理工大学计算机与通信工程学院,湖南长沙410076

出　　处：《计算机工程与设计》2008年第22期5702-5705,共4页Computer Engineering and Design

基　　金：湖南省教育厅重点资助科研基金项目(06A003);湖南省教育厅科研基金项目(06C122)

摘　　要：为解决Ad Hoc网络中路由协议在通信过程中存在拥塞问题,提出了一种基于带宽估计的拥塞控制策略。该策略通过结合一阶低通数字滤波算法和算数平均值滤波算法,有效提高可用带宽估计的精确度;采用主动队列管理算法实施拥塞控制,实现对包的选择性丢弃策略,达到了较优的控制效果。实验结果表明,该算法在各项重要指标上都有较好性能。In order to solve the problem of traffic congestion that always occurs in multi-hop Ad Hoc networks, a congestion control strategy based on improved bandwidth estimation is proposed. It can improve effectively the precision of estimating available bandwidth by combining the first-order digital low pass filtering algorithm and the arithmetic average value filtering algorithm. By using the algorithm of active queue management to implement the congestion control, which realizes the selective package abandoning tactics, more excellent controlling effect can be reached. The results of experiment illustrate the algorithm has good performance on many important indexes.

关 键 词：数字滤波 带宽估计 ADHOC网络 队列管理 拥塞控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]