Performance Analysis And Research Of 5G Smart Repeater System

The millimeter wave frequency band is rich in spectrum resources,which can greatly alleviate the problem of resource shortage,and has broad application prospects in 5G and future 6G mobile communication systems.However,due to the large free space loss of millimeter wave and the limited effective transmission distance,its coverage radius is small,which brings difficulties to the actual deployment.5G Smart Repeater is an enhancement of traditional relay,which can not only amplify and forward received signals,but also interact with the network for information.As a low-cost solution,Smart Repeater can effectively overcome the shortcomings of insufficient cell coverage in the millimeter wave band,expand the network coverage and improve the network coverage.In this paper,aiming at the deployment and application of Smart Repeater system,a system-level simulation platform is built,and the network performance of Smart Repeater system is studied and analyzed.The main contributions of this paper are as follows:(1)In response to the limited research on 5G Smart Repeater,the lack of a clear plan for the deployment of Smart Repeater,and the lack of relevant system level simulation platforms,this article uses the International Telecommunication Union(ITU)simulation standards on the basis of the 5G system level simulation platform to model the large-scale channel of Smart Repeater and build a system level simulation platform for the 5G Smart Repeater system,And conduct research on the deployment plan of Smart Repeater.The simulation analyzed the impact of the deployment quantity,deployment location,and forwarding gain of Smart Repeaters on system performance in high-frequency scenarios.The simulation results demonstrate that reasonable deployment of Smart Repeater in the system can significantly improve the signal quality of edge users and increase signal coverage,proving that Smart Repeater is a promising coverage enhancement technology in 5G high-frequency scenarios.(2)Based on the simulation results of the system-level simulation platform of the Smart Repeater system,this paper studies the performance optimization scheme of the Smart Repeater system.The performance optimization effects of on-off information,gain control information and beam indication information on the Smart Repeater system are simulated and analyzed respectively,and the genetic algorithm is introduced in the simulation analysis process to optimize the gain setting and beam indication of the Smart Repeater when the system SINR is maximized.The simulation results show that adding on-off information can effectively reduce the interference brought by deploying Smart Repeater.Adding gain control information can improve the gain of edge users while maintaining a low level of system interference.Adding beam indication information can effectively improve the signal quality of edge users.It is proved that adding control information to the Smart Repeater system can make the system more flexible to adjust the working state of the Smart Repeater,more efficient to enhance the system coverage and reduce the system coverage hole.