AODV路由发现过程中基于动态概率的优化研究  

Optimization research for AODV route discovery based on dynamic probability

作　　者：孙悦[1] 魏艳艳[1] 

机构地区：[1]陕西交通职业技术学院,西安710018

出　　处：《工业仪表与自动化装置》2017年第4期35-39,68,共6页Industrial Instrumentation & Automation

基　　金：陕西省青年基金"异构网络中的分层并发传输技术研究"(61501285)

摘　　要：AODV中,洪泛效率低且会引起冗余消息的转播,导致过度使用有限的网络资源从而减少网络生存期。该文提出一种改进协议,基于动态概率的广播技术来减少洪泛问题。为实现路由发现中高效广播,基于节点剩余能量强度和阈值随机延迟动态地产生重播概率。该方法在AODV协议上展开分析,通过修改AODV的路由请求包来收集节点能量信息。采用ns2仿真器,通过发送广播包和端对端延迟分析了改进协议的性能。仿真结果表明,冗余传输率大大降低,且延长了网络的生存期。In AODV,flooding is inefficient and results in redundant message relays,which in turn over use limited network resources to reduce the lifetime of the network.In this paper,dynamic probability based broadcasting technique for routing protocol is proposed to trim down flooding problem.It uses nodes remaining energy strength and threshold random delay to generate rebroadcast probability dynamically for the efficient broadcasting in route discovery.This protocol is analyzed over AODV protocol by modifying the route request packet of AODV to gather energy information of nodes.The performance of modified protocol is analyzed over broadcast packets sent and end-to-end delay using ns2 simulator.Simulation results show that redundant transmissions are reduced greatly and extend the lifetime of the network.

关 键 词：洪泛 网络资源 动态概率 路由发现 路由请求包 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]