Research On Routing Protocol For 3D UAV Adhoc Network

UAV ad hoc network provides efficient solutions for various military and civil applications.However,the aerial motion capability of UAV makes UAV network present three-dimensional topology.At the same time,the high mobility of UAV nodes leads to the rapid change of network topology.Therefore,the traditional routing protocol can not adapt to the UAV ad hoc network environment effectively,and the network communication performance is significantly reduced.In this paper,the routing algorithm of UAV ad hoc network is studied in two aspects.Firstly,aiming at the problems of high dynamic network topology and unreliable links in UAV ad hoc network,a geographic routing protocol based on mobility prediction and extreme learning machine GPSR-ELM is proposed.In GPSR-ELM,a link lifetime prediction method of three-dimensional network topology is introduced.On this basis,the concept of connection time between node and base station is proposed,and the distributed update mechanism of connection time is designed.In the forwarding decision-making process of routing,extreme learning machine is used for optimization.The connection time is taken as the reference factor and the failure nodes are screened out by position prediction.Through simulation,compared with AB3D,GPSR-3D,SP-GMRF and PSPFP,GPSR-ELM can significantly improve the packet delivert rate of the network,and also has a stable delay and other performance.Secondly,considering the real-time multimedia transmission scenario of UAV ad hoc network,this paper proposes a multimedia geographic routing protocol MDTR-TL based on transfer learning.In MDTR-TL,a basic QoS model based on neural network is proposed to evaluate the QoS level of links in multimedia scenes.Then the offline QoS computing model and online QoS computing model are cloned from the basic QoS computing model and the single hop link QoS computing model is composed of these two parts.Transfer learning is also used to improve the adaptability of the model to different network environments.Based on the single hop link QoS,the concept of multi hop QoS from node to base station is proposed,and a distributed update mechanism of multi hop QoS is designed in the routing process.In the forwarding decision-making process of MDTR-TL,multi hop QoS is taken as the main reference factor.Through ns-3,the results show that compared with 3DPBARP,LinGO,GQPR and GGFGD,MDTR-TL can effectively improve the network throughput and obtain stable delay in the multimedia real-time transmission FANETs.