摘要
按需距离矢量路由协议(AODV)在寻找路由时是通过洪泛法发送路由请求(RREQ)实现的。洪泛法能较好地找到所需的路由,但时延较大,产生了许多不必要的重传,易造成广播风暴。针对AODV路由协议,提出了一种基于概率转发的机制。这种机制根据邻居节点的个数,选用不同的概率转发RREQ。NS2仿真模拟结果表明,该方法可以降低时延,提高吞吐量,提高分组投递率。
Ad hoc on-demand distance vector routing （AODV） send Route REQuest （RREQ） through flooding when it wantto search routing. Flooding can find the routing but the delay is long and it is generate many retransmission. Even worse, it is easily bring broadcast storm. This paper researched AODV routing protocol and gived a mechanism based on probabilistic forward. This mechanism choose different probabilistic forwarding RREQ through neighbor＇s numbers. The NS2 simulation results shows that this idea can decrease delay and can increase thoughput as well as packet delivery fraction ratio.
关键词
AODV
概率转发
NS2
广播风暴
无线网络
Ad hoc on-demand distance vector routing
probabilistic forwarding
network simulator version2
broadcast storm
wireless network
