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基于邻节点残存率的AODV路由优化算法


摘 要:针对AODV路由发现缺少路径稳定性考虑以及本地修复没有避开不稳定区域的缺陷,提出了基于邻节点残存率的AODV-NSR优化算法。借助于邻节点残存率AODV-NSR对路由发现算法进行优化,使路径稳定性得以提高;借助于断链责任检测和数据抢救机制,AODV-NSR对本地修复算法进行优化,使本地修复尽可能避开不稳定区域,从而降低二次断链的几率。仿真实验表明,AODV-NSR对Ad hoc网络的性能有较为明显的提高。
  关键词:Ad hoc网络;按需距离矢量路由;邻节点残存率;断链责任检测;数据抢救
  中图分类号:TP393.17 文献标志码:A
  文章编号:1001-3695(2010)03-1102-04
  doi:10.3969/j.issn.1001-3695.2010.03.082
  
  Improved AODV routing algorithms based on neighbor survival ratio
  
  LIU Jin-ding1,YAN Han2
  
  (1.College of Information Science & Technology, Nanjing Agriculture University, Nanjing 210095 China;2.College of Computer Science & Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)Abstract:In the traditional AODV routing protocol, the route discovery algorithm does not consider route’s stability, and the local repair algorithm does not avoid the instability regional around broken link.Aiming at the above-mentioned problems, the article proposed an improved AODV algorithm based on neighbor survival ratio (AODV-NSR).With neighbor survival ratio of node, AODV-NSR improved the route discovery algorithm and enhanced route’s stability. With broken link responsibility detecting and data rescue mechanisms, AODV-NSR improved the local repair algorithm and made repaired route avoid the instability regional at full steam, and so diminished the probability of broken link. The result of the simulation indicates that AODV-NSR protocol can reduce the end-to-end delay, routing overhead and enhance packet delivery rate. ......
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