应用于移动节点行为检测的基于PPM中继路径构造  

PPM-based relay path construction used in behavior detection of mobile nodes

作　　者：桂劲松[1] 陈志刚[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：《中南大学学报（自然科学版）》2011年第10期3078-3085,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(60873082;60903058);湖南省自然科学基金资助项目(10JJ3087);中南大学博士后科学基金资助项目(2009年)

摘　　要：在无线接入网环境下,移动节点采用AODV路由协议,提出一种基于PPM(Probabilistic packet marking)的中继路径构造方法。移动节点以一定概率标记它中继的包,无线接入点收集被标记的包,1个专门服务器根据一定数量的被标记的包头中所含信息,依据一定算法构造中继路径。该方法的关键是一旦前1个节点标记了包,随后若干节点将针对被标记的包增添自身标记信息,以加快构造算法的收敛速度。研究结果表明:不同标记概率和标记次数对收敛包数和收敛时间有影响,当标记概率为0.2以及标记次数为4时可获得较好的仿真结果;与利用DSR(Dynamic source routing)的源路由信息来获得中继路径的方法相比,本文方法的IP包头开销明显降低。Under the circumstance where mobile nodes in wireless access networks adopt AODV routing protocol,a relay path construction method based on PPM（Probabilistic packet marking） was proposed.Mobile nodes in the marked packets were relayed by them according to the specified probability,wireless access points collected the marked packets,and the specific server constructed a relay path according to the information from IP headers of the marked packets and the specified algorithm.The key idea of the method is that once a mobile node marks packets,some subsequent nodes superinduce their marking information in the marked packets,which improves the convergence speed of the path constructing method.The impact of marking probability and marking frequency on the number of convergence packets and convergence time was analyzed through the simulation.The results show that when a marking probability is 0.2 and a marking frequency is 4,a better simulation result is gained.Furthermore,the method has less IP header costs than that based on DSR（Dynamic source routing）.

关 键 词：无线接入网 行为检测 中继路径 概率包标记 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]