Performance Analysis and Handover Protocol Optimization for Space-Air-Ground Multi-layer Heterogeneous Integrated Networks
To address the complex handover problem in multi-layer heterogeneous integrated networks(MLHetINet),this paper develops a staring beam and interference cancellation algorithm to get valid data for handover analysis,simplifies the beam alignment and acquisition process,expands the coverage of the air-based network,and reduces the complexity of cross-layer handover.Firstly,aiming at the relatively high-speed movement between the ground terminal and the air base station,this paper develops a dynamic staring multi-beam forming algorithm to adaptively adjust the antenna phase and weight,and generates the main lobe in the target direction and the zero-trap for the interference source to achieve airspace isolation,thus simplifying the complexity of handover analysis.Then,considering the complexity of the air-ground channel,a multi-order interference cancellation algorithm based on column norm grouping sorting is pro-posed to further improve the detection accuracy of the target signal and the accuracy of handover analysis.Finally,based on the staring beam and interference cancellation algorithm,an independent handover proto-col is designed for handover events in the space-air-ground three-dimensional MLHetINet,which signifi-cantly reduces the consumption of network resources.Through simulation,it is verified that the user infor-mation rate in the three-dimensional MLHetINet is significantly improved compared with that in the tradi-tional ground network and space-ground integrated network.
万方数据
维普
