对流层散射信道下Ad Hoc网络路由防断裂技术

Anti-fracture Technology of Ad Hoc Network Routing in Tropospheric Scatter Channel

现有Ad Hoc网络路由防断裂研究多采用在理想信道下将单一接收端功率作为路由监测的依据。为了增强反导作战组网性能,引入通信距离远、抗干扰能力强的对流层散射信道,研究该信道及设备的特性对Ad Hoc网络路由的整体影响;提出了散射信道路由状态监控模型,力图在路由断裂之前迅速定位"虚弱态"路由的末端节点;根据RE-AODV的优化协议,发起反向路由搜索以修复受损路由。结果显示,改进的散射信道路由修复协议RE-AODV使平均端到端时延最大降低17.1%,减小控制报文开销最大21.8%,同时能在高速状态下保持过70%的分组投递率,能较好地防止高速移动节点的路由断裂。

Most of the existing Ad Hoc network routing researches are to use the single receiver power as the basis of the ideal channel. In order to enhance the performance of anti-missile network, the tropospheric scatter channel with long communication distance and anti-interference ability is introduced, and the overall effect of the channel and device characteristics on Ad Hoc network routing is studied. According to the AODV optimization protocol, a monitoring model for the routing status of scatter channel is proposed, which can quickly locate the end nodes of ＂ weak ＂ routing and initiate a reverse search for damaged routes before the routes break. Simulated results show that the improved routing protocol RE-AODV reduces the average end-to-end delay by 17.1% and the maximum control packet overhead by 21.8%. The packet delivery ratio of RE-AODV algorithm maintains at 70% or even higher, which proves that it can prevent the routing fault of high-speed mobile nodes.