Coexistence Research Of NR System In Multiple Scenarios

The 5th generation mobile network(5G)system has a stronger demand for high-speed,low delay,high system reliability,low energy consumption and other system indicators.With the development of mobile communication technology and the promotion of 5G network high indicators,The future business scenarios will be more complex and diverse,and the demand for frequency band resources will be more intense.Therefore,considering the coexistence of 5G NR(New Radio)system in various scenarios has not only research value,but also practical significance.This thesis focuses on the coexistence of NR systems,specifically analyzes the coexistence of public and private networks in the macro base station scenario,the coexistence of macro base station system and indoor hotspot system,and the coexistence of traditional NR system and IAB(Integrated Access and Backhaul)system.In each part,Monte Carlo simulation method is used to build simulation platform for different system models and interference scenarios,and isolation suggestions are given to meet the system coexistence index.The first part is about the coexistence of public and private networks in the macro base station scenario.Firstly,the interference calculation model of NR system is studied,including path loss model,building wear model,antenna and beam forming model,uplink transmission power control model and L2S(Link Level to System Level)interface mapping.Then,the scene topology and interference calculation method of the proposed two kinds of interference scenarios:horizontal distance scene and circular scene are studied and improved.Finally,the Monte Carlo simulation method is used to build the simulation platform.According to the simulation results and the evaluation criteria of interference coexistence,the isolation degree between public network and private network is proposed.The second part is the co-existence of macro cell system and indoor hotspot system.Firstly,the indoor hotspot system model is studied,and the path loss model and antenna model different from those in the macro base station scene are analyzed.Based on the particularity of hot spot system topology,two interference scenarios are proposed:the overlapping coverage scenario and the hollowing out scenario.In the overlapping coverage scenario,we focus on the interference of whether the user of Acer enters the hot spot system or not.Finally,through the Monte Carlo system level simulation method,the simulation results of macro station system and indoor hot spot system under different interference scenarios are obtained,and the corresponding simulation analysis is carried out,and reasonable suggestions for the isolation degree of the two systems are given.The third part is the research on the coexistence of traditional NR and IAB systems,which mainly studies the interference coexistence between traditional NR and IAB and the interference coexistence between IAB and IAB networks in the macro station scenario.Firstly,the structure of IAB base station is introduced,and the related contents of IAB system model are mainly studied,including the path loss model between IAB macro base station and micro base station,and the uplink power control model of IAB micro base station.Based on beamforming at base station,an interference control strategy is proposed for uplink interference.Finally,the simulation results of inter-uplink interference and inter-downlink interference are obtained,and the coexistence suggestions between traditional NR and IAB and between IAB networks are given.The simulation modeling of interference control process is carried out,and the rationality and effectiveness of the scheme are verified by the simulation results.