摘要
针对在军事通信、地震或水灾等自然灾害发生时应急通信等特殊场合,移动自组织网络中路由协议不够完善的问题,提出了一种基于AODV协议的改进路由协议B-AODV,弥补了在AODV协议中路由发现过程延迟时间较长和路由维护过程路由重建几率较小的不足。在B-AODV中,首先使用了反向路由发现:广播控制消息反向路由请求代替控制消息路由回复,这样减少了路由发现的次数;其次,在路径重建过程中,采用了控制消息以及路由表中都记录相邻两跳节点地址的技术,减少了发现路由的时间,增加了路由修复的概率,提高了网络的性能。在NS2的环境下实现了AODV协议及改进后B-AODV协议的仿真,对其从分组传送率、平均端到端延时和路由开销这三种性能指标作了定量的分析,验证了改进后的路由协议优于原有的按需距离矢量路由协议AODV。
In special situation such as military communications,earthquake or flood and so on,the routing protocol of Ad Hoc network can not meet the real-time communication.This paper presents an optimized protocol： B-AODV based on the shortage of routing finding and routing repair of AODV.First through reverse request by sending BRREQ replace of RREP,it reduces the time of routing finding.Second,two hops IP record in control messages and route table can improve the rate of routing repair and reduces the times of routing findings.And it improves the function of Ad Hoc network.This simulation experiments are based on NS2 and compared the performance of AODV and B-AODV.And it compared the differences of control packets,ratio of packets,end to end delay for AODV and B-AODV.It shows that B-AODV is better than AODV.
出处
《科学技术与工程》
北大核心
2013年第18期5207-5213,共7页
Science Technology and Engineering
基金
国家自然科学基金(61170147)资助
