Research On Load Balancing Technology For UAV Flying Ad Hoc Network Routing Protocol

Nowadays,UAV system is widely used in the fields of military and civilian life.Compared with single UAV,the collaborative work of multiple UAVs can be more effective,flexible and practical.The self-organizing network composed of UAVs can be regarded as a special form of Mobile Ad Hoc Network,which has the characteristics of no infrastructure assistance,simple deployment and easy expansion.The research content of this paper is aimed at the problem of unbalanced network load distribution due to the high-speed mobile link of the UAV Ad Hoc network,and comprehensive analysis of the performance advantages and disadvantages of multiple routing protocols in the UAV network.Research and design the widely used AODV routing protocol(Ad hoc OnDemand Distance Vector Routing,AODV)to make it show better performance in the high-load and high-mobility UAV Ad Hoc network.Aiming at the problem that the AODV protocol only uses the number of hops as the only criterion for routing selection,it cannot select the most stable and best-quality routing in the network,and the use of single-path data transmission cannot well achieve the problem of the balanced distribution of traffic in the network.This paper combines the AODV protocol with cross-layer optimization design,multi-metric weight optimization,multi-path routing ideas and load balancing strategies,and proposes the CLB-AODV routing protocol(Cross-layer Load-Balancing based AODV).First,the CLB-AODV routing protocol achieves cross-layer information sharing within the node through cross-layer optimization design.Secondly,in order to select a routing with more stable links and a longer survival time,we optimized the calculation of the routing criterion,taking into account the energy of the node,the remaining queue length of the node buffer and the mobility between adjacent nodes.Create multiple routings with the best routing quality for data transmission.Finally,in order to achieve network load balancing,a new Load message is added to deliver the network load situation.The load of the path is calculated by the workload of the node in the active path and the number of path hops.The source node dynamically allocates data traffic to multiple paths according to the load of different paths.Ultimately improve network stability,reduce end-to-end delay,and reduce the possibility of network congestion.This paper uses OPNET simulation software to design the network model of the CLB-AODV routing protocol to verify the feasibility of the protocol.It is compared with traditional AODV protocol,it compares the impact of different routing protocols on network performance under different network scales,different node moving speeds,and different load scenarios.Compare to the results in terms of throughput,average end-toend delay and routing overhead,it is verified that CLB-AODV can effectively increase the throughput,reduce the transmission delay and improve the stability of the network in the high-load and high-mobility UAV Ad Hoc network.