Research On Airborne UAV Relay Network Deployment Strategy In Complex Environment

In recent years,with the diversified development of relay communication technology,relay communication has been more and more widely used in various communication scenarios.Due to the flexibility,convenience and wide coverage of UAVs,using it for relay communication has obvious advantages over satellite relay and ground relay communication.Therefore,more and more UAV relay communication platforms It is used in civilian and military fields.However,the following problems still need to be resolved: 1)UAV relay communication coverage: A relay network platform is formed through the reasonable deployment of multiple relay UAVs;2)The survivability of the UAV relay network: In military applications,UAVs are used in military operations to exchange information between combat aircraft.Therefore,the survivability of the UAV relay communication network has a great impact on the reliability of coordinated operations;3)The cost of relay drones: Use as few drones and power consumption as possible under the condition of ensuring network coverage and connectivity.Therefore,this paper uses UAV as a relay node to conduct related research on the deployment strategy of the relay network in the UAV air relay communication platform.The main research work of this paper is as follows:1)Review the relevant research on the deployment of UAV relay network.First,it introduces the research background and significance of UAV relay network deployment,and then introduces the current development of UAV relay network deployment strategy,and conducts a simple analysis of the relay network deployment strategy,and finally summarizes the possible problems in the deployment of UAV relay network at this stage.2)A brief introduction to the relevant theoretical knowledge of the UAV relay communication network.First,the channel model of UAV in the air relay communication network is determined,and then the research strategy of UAV relay network deployment based on coverage optimization is described.3)Briefly introduce the theory of UAV aerial relay network deployment,and design the optimization strategy of relay network deployment.Firstly,a model of the UAV relay communication network platform is constructed based on the related theoretical research on the deployment of UAV relay network.Secondly,the evaluation index of the relay communication network is defined,and the objective function is designed based on the air relay communication platform.Then this paper proposes the concept of node aggregation to measure the invulnerability of the relay network,and uses the average moving distance and distance standard deviation of the relay drone during the deployment process to measure the energy consumption balance of the relay UAVs.Finally,according to the relay network deployment optimization strategy in this paper,an improved particle swarm optimization algorithm based on virtual force is proposed.Use virtual force algorithm to avoid particle swarm optimization algorithm falling into local optimal solution during the update process.Through the improvement of the particle update formula,the inertia weight and the adaptive ability of the learning factor are improved,and a better relay network deployment effect is achieved.4)Under ideal conditions and complex environments,the UAV relay network deployment network coverage optimization algorithm is simulated.Analyze simulation results and comprehensive evaluation indexes of network performance.The improved particle swarm optimization algorithm based on virtual force proposed in this paper separately adjusted the inertia weight factor,learning factor and virtual force step length,so that the relay network deployment strategy was further optimized.