Research On Enhanced Scheduling Methods For 5G-Advanced System

Currently,the fifth generation(5G)is undergoing research and standardization of the second phase of the 5 G-Advanced which focuses on exploring the potential of 5G networks.5G-Advanced is committed to researching and supporting new services to achieve faster data transmission speeds,shorter latency and greater capacity.In the protocol stack of 5G-Advanced system,the scheduling algorithms of media access control layer can be adjusted according to the requirements of service type,power consumption,etc.,which improve service quality,while physical layer supports a series of signal processing and modulation technologies to provide richer radio resource allocation strategies.Therefore,how to combine the enhanced scheduling method of media access control layer and physical layer and improve system performance has become one of the research hotspots of 5G-Advanced system.This paper focuses on the enhanced scheduling method of 5G-Advanced system,and the main research work and innovation points for performance requirements such as capacity,power consumption,and delay include:(1)According to relevant protocol standards,a system-level simulation platform of 5G-Advanced system is designed and built,and basic modules are developed including topology and scenario module,channel module,scheduling and resource allocation module.The complete communication process and corresponding key technologies are realized,and the accuracy calibration of the simulation platform is completed,which is used as the basic platform for subsequent algorithm verification.(2)Aiming at the requirements of extended reality service scenarios for low power consumption and low latency in 5G-Advanced systems,the low-power scheduling methods in the media access control layer such as discontinuous reception mechanism and downstream physical control channel monitoring and regulation technology are modeled and verified,and based on the newly introduced low-power wake-up signal(LP-WUS)technology introduced in the 5G-Advanced system.Two low-power scheduling methods are proposed:LP-WUS combined with discontinuous receiving mechanism and LP-WUS combined with downstream physical control channel monitoring and regulation technology,and the results show that the two proposed scheduling methods achieve the performance balance between system power consumption and delay.(3)Aiming at the further optimization requirements of multi-user capacity,energy consumption costs in scenarios including extended reality services in 5 G-Advanced systems,a large-scale multiple-input,multioutput multi-user matching scheduling method is proposed based on hybrid beamforming architecture,which reduces the cost and user interference and improves channel gain by the proposed low-energy hybrid beamforming algorithm based on block diagonalization.On this basis,the multi-user matching algorithm based on branch delimitation method reduces the complexity and further improves the sum rate.The simulation results show that the proposed scheduling method can effectively improve the capacity of the system under the low energy cost and low complexity.