MANET中基于自相似流量的负载自适应路由协议  

Load-adaptive Routing Protocol for MANET Based on Self-similar Traffic

作　　者：曾锋[1] 陈志刚[1] 赵明[1] 葛志辉[1] 李庆华[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《小型微型计算机系统》2008年第11期2031-2034,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60573127)资助;高等学校博士学科点专项科研基金项目(20040533036)资助

摘　　要：最近,QiLian Liang和Shouyi Yin两位学者分别证实了MANET中流量的自相似性.本文利用自相似性流量的可预测性,使用统计学方法进行流量预测;同时,提出节点可负载度的概念,用于描述节点接受负载的能力,并把流量预测的信息加入到该度量中,使得可负载度能表示节点当前及下一时间段的负载状况;该度量还具有负载的自适应性,能根据节点负载状况,调节流量预测所起的作用,为路由协议提供有效的支持;综合流量预测与节点可负载度,本文在DSR协议基础上提出LBDSR协议,该协议使用节点的可负载度均值来判断路由的优劣,由此实现网络吞吐量的提高和负载均衡.模拟实验显示,在网络高负载时,本文协议与DSR协议相比,网络吞吐量提高6.5%,网络端到端时延下降8.3%.The self-similarity of traffic in MANET has been proved respectively by QiLian Liang and Shouyi Yin. Based on the predictability of self-similar traffic, this paper introduces a statistical methodology to predict the traffic, then, combines the measured traffic and the predicted traffic to form a new metric named loadability degree, which can be used to evaluate the node＇s ability to handle traffic and can adjust itself to the change of traffic. Also, this paper presents a load-adaptive routing protocol LBDSR using the new metric for route selection. This protocol can effectively balance the traffic and improve through- put within the MANET. Simulation results show that when the network traffic is heavy, comparing with DSR, LBDSR can improve the network throughput by 6.5% with the average end-to-end delay 8.3% decreased.

关 键 词：流量预测 可负载度 负载均衡 MANET路由协议 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]