Research On UAV Network Technology In Air-ground Integrated Network

The air-ground integrated network is an important system to quickly get accurate information in modern battlefield,and is of great significance in winning information warfare.In recent years,the development of related technologies,such as wireless sensor networks,self-organizing networks,UAV and low power wide area Internet of Things,has made it possible to establish the air-ground integrated battlefield communication networks.Due to the small size,low cost and reconnaissance,UAVs can play an important role in the air-ground integrated network.Therefore,this paper studies the UAVs network under the air-ground integrated network,including UAVs' planning problems in the process of collecting sensor data and the routing algorithm of the UAVs' self-organizing network.1.The UAVs' planning problem and the self-organization concept,IP address assignment and routing algorithm in the UAVs' self-organizing network are summarized.2.For the path planning problem when a single UAV collects data from sensors,the spiral path planning algorithm with low complexity is proposed.The idea of SPP algorithm is to divide the convex polygon surrounding all sensor nodes into circular rings.Uav accesses the rings in order from the outside to the inside.The algorithm improves the convergence speed of the algorithm and improve the accuracy of the algorithm.3.For the problem of multi-UAVs cooperative area coverage,this paper proposes multi-UAVs area decomposition and coverage based on complete region coverage.First,the target area is transformed into honeycomb and the centers of the cells constitute a connected graph,so area decomposition is transformed into the problem of dividing the connected graph into sub-connected graphs.Then,find a Hamiltonian cycle inside the sub-connected graph as each UAV's path.The algorithm not only simplifies the problem of cooperative area coverage,but also helps improve the overall speed of the unmanned fleet to perform tasks and shorten the delay of sensor data.4.For the routing problem of UAVs' self-organizing network,this paper proposes an AODV-ETD routing algorithm with the expected transmission delay as the routing metric.The algorithm retains two characteristics of AODV,the AODV serial number and on-demand routing.The simulation proves that using the expected transmission delay as the routing metric can effectively improve the packet delivery rate.5.DTN protocol has been simulated.The result shows that the DTN protocol has a higher packet delivery rate when dealing with the rapidly changing network environment.