一种基于通信量趋势预测的Ad-hoc网络拥塞控制策略  

Congestion Strategy Based on Traffic Trend Forecasting for Ad-hoc Networks

作　　者：王文涛[1] 王豪[1] 朱容波[1] 郭峰[1] 郑芳[1] 

机构地区：[1]中南民族大学计算机科学学院,武汉430074

出　　处：《计算机科学》2014年第8期148-153,共6页Computer Science

基　　金：国家自然科学基金(61272497)资助

摘　　要：针对反应式MANET路由协议在较大通信量模式下出现的RREQ报文拥塞问题,提出一种新的机制。该机制根据分组投递率和数据包发送速率的拟合函数曲线设定不同的阈值响应路由请求,当平均队列长度超出最大阈值时,以一定概率随机丢弃RREQ报文,同时根据拟合函数公式来决定Hello包发送周期。仿真结果表明,新的机制在没有明显增加路由发起频率的情况下,能够有效降低平均端到端延时和Hello包开销,提高了分组投递率。For the RREQ message congestion problems of reactive MANET routing protocols in high traffic mode, this paper proposed a new mechanisnx The mechanism sets different threshold to response to the route request according to the fitting curve of packet delivery ratio and packet sending rate, and the RREQ is dropped with a certain probability randomly when the average queue length exceeds the maximum threshold. The Hello packet interval is also determined by the fitting function. The simulation results indicate that without obvious increase of routing discovery frequency, the new mechanism can reduce the average end-to-end delay and Hello packet overhead effectively, and thereby improves the packet delivery ratio.

关 键 词：拥塞控制 拟合函数 阈值 AD-HOC网络 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]