Research On Key Techniques Of Integrated Communications For Air-ground Self-organizing Collaborative Networks

The air-ground cooperative network is composed of multifunctional nodes in threedimensional space,which face diverse tasks and carry multiple types of dynamic services.According to the different service requests in the air-ground self-organized cooperative scenario,multi-rate matching and adaptive physical resource scheduling mechanisms are needed to realize multi-service information integrated communication.To address this problem,this thesis investigates the converged communication technology for air-ground self-organizational cooperation,designs a physical layer converged communication regime supporting multiple rates,conducts a multi-rate communication performance analysis based on a typical air-ground cooperative physical channel,gives a MAC layer architecture design under the converged communication regime,and proposes an adaptive rate-matching converged communication scheduling algorithm based on multiple service types.The main research contents and innovative contributions of this thesis include:Designed A multi-rate convergent communication regime for multi-service requirements in air-ground cooperative communication scenarios.Firstly,the DSSS and OFDM communication regimes for multi-service are designed in the physical layer,and the multi-rate fusion communication mechanism for multiservice is implemented based on different channel coding and digital modulation strategies.Secondly,the wireless channel modeling under the air-ground cooperation scenario is completed,and the performance analysis of the multi-rate fusion communication system is completed under the channel model,and the system error bit rate curves under different communication rates are given.Designed A distributed MAC layer architecture based on the multi-rate converged communication system.For different service requests in cooperative scenarios,the scheduling modules are designed in the MAC layer,including service demand analysis,channel quality assessment,multi-rate matching and resource scheduling,to realize multi-rate matching and dynamic adaptive resource scheduling under different channel quality and dynamic service requests.Finally,the specific workflow between each scheduling module is analyzed.Proposed the multi-rate matching based adaptive resource scheduling algorithm.Based on the different service requests in the air-ground self-organized cooperative scenario,this algorithm completes the rate,delay,and false bit rate analysis of services based on the scheduling module,and combines the current channel quality estimation results to complete the multi-rate matching and dynamic adaptive physical resource scheduling,which meets the communication needs of different types of services and improves the channel resource utilization and system transmission efficiency.The simulation results demonstrate the effectiveness of the proposed algorithm in rate matching and resource scheduling.Through reasonable rate matching and time slot resource scheduling,the algorithm effectively reduces the transmission delay of highpriority services and improves the network throughput and packet delivery rate indexes compared with existing algorithms.The multi-rate integrated communication and adaptive resource scheduling algorithm studied in this thesis have theoretical and practical implications for multidimensional spatial cooperative applications such as air-ground self-organizational cooperation.