摘要
AODV是MANET网络中典型的按需路由协议。针对AODV路由策略的缺陷,提出一种基于节点状态的路由发现和建立策略。通过对MANET网络建模,在路由发现时,利用马尔可夫链预测邻节点的状态,在原有AODV路由策略的基础上,上一跳节点利用AODV路由发现时建立的反向路由获取邻节点的状态信息;在路由建立时,结合邻节点的状态信息,优先选择处于空闲状态和休眠状态的节点作为下一跳路由。仿真结果表明,基于该策略优化的AODV路由协议提高了网络中数据包的投递率,降低了端到端延迟,改善了网络性能。
AODV is a typical on-demand routing protocol in MANET networks.For the defect of AODV routing strategy,a routing discovery and establishment strategy based on node state was proposed.By modeling the MANET network,Markov chain is used to predict the state of neighbor nodes during routing discovery.Based on the original AODV routing strategy,the last hop node uses the reverse routing established by the AODV routing discovery to obtain the status information of the neighbor node.When routing is set up,combining neighboring node status information,the idle and dormant nodes are preferentially selected as the next hop routing.The simulation results show that the AODV routing protocol optimized based on this strategy improves the packet delivery rate in the network,reduces the end-to-end delay,and improves the network performance.
引文
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