摘要
在AODV路由协议的路由维护阶段,当节点检测到链路中断时,会采取一种链路修复机制,然而该机制的实施难以避免数据包的丢失和传输时延的增加,针对这个问题本文提出一种对AODV协议的改进方案。该方案通过计算节点间的链路生存期,在AODV协议的路由发现阶段引入优先节点机制,在路由维护阶段引入链路中断避免机制。仿真实验结果表明,改进的AODV路由协议减少了RREQ消息的数量,降低了丢包率,并且缩短了传输时延,特别适用于节点密度较大的车载网络。
During the route maintenance phase,the AODV routing protocol adopts a link repair mechanism. However,this mechanism can＇t avoid the rising of packet loss rate and the increasing of transmission delay. To address the issues,this paper proposes an improved method for route maintenance of AODV routing protocol. This method uses the priority nodes judging mechanism in routing discovery phase to prevent the flooding caused by RREQ message,and uses the break link avoiding mechanism in routing maintenance phase to decrease the rate of the packet loss. The two mechanisms are both carried out by calculating link expiration time. The simulation results from the Network Simulator Version 2（ NS2） show that the improved AODV routing protocol performance well in the dense and fast motion VANET.
出处
《计算机与现代化》
2016年第8期86-90,96,共6页
Computer and Modernization
