【摘要】 无线自组网按需平面距离矢量路由(AODV)算法在路由发现过程中会产生大量的广播消息,消耗了大量网络资源,严重影响了网络的服务质量(QoS)。针对这个不足,提出了一种跨层服务质量保障机制。使用了以信噪比(SNR)确定下一跳节点为准则的增强型无线自组网按需平面距离矢量路由(E-AODV)算法,并且应用了无线传输控制协议(WTCP)来提高数据传输可靠性。仿真结果表明,所提机制可以有效地将网络中的数据交付时延(DDL)减少近56%,同时将数据交付率(DDR)提高近24%。更多还原

【Abstract】 As one of the most popular routing protocols proposed by Internet Engineering Task Force(IETF),Ad Hoc on Demand Distance Vector Routing(AODV) has been implanted for many applications in Mobile Ad Hoc Network(MANET).In AODV,enormous broadcasting messages are generated during route discovery procedure,which consumes lots of bandwidth and degrades significantly the Quality of Service(QoS) of networks.To solve this problem,a cross-layer mechanism with a routing protocol Enhanced AODV(E-AODV) was proposed.In E-AODV,the Signal to Noise Ratio(SNR) of received signals was considered as the key criterion to select the next hop.Furthermore,Wireless Transmission Control Protocol(WTCP) was implanted as one important way in E-AODV to obtain a better QoS.The simulation results show that the proposed mechanism can reduce the Data Delivery Latency(DDL) up to 56% and improve the Data Delivery Ratio(DDR) up to 24%.更多还原