Study Of CoMP Downlink User Scheduling Algorithm In LTE-A System

The International Telecommunication Union has higher requirements for the performance indicators of the next generation of mobile communication system,so 3GPP organization proposed long-term evolution(LTE)technology.Inter-cell interference is a major interference.In the LTE system,the method of reducing inter-cell interference is mainly through the inter-cell interference coordination(ICIC)mode.In order to further reduce the inter-cell interference,Coordinated Multi-Point(CoMP)is adopted to reduce inter-cell interference(eICIC and FeICIC).In the LTE-A system,the key technology of CoMP is applied to solve the problem of limited edge user performance.CoMP downlink users scheduling algorithm has become the current research focus.In this thesis,they study the downlink single-user scheduling algorithm,mainly research and simulate two programs.(1)A scheduling algorithm for Coordinated Multi-Point(CoMP)under LTE-A system,that is the user's fairness based on SU-CoMP scheduling algorithm(FBSC),users will be divided into edge users and central users according to SINR,it's the same scheduling opportunity to the center and edge users,it can further enhance the system throughput and bring significant system gain.(2)One is the user's fairness based on SU-CoMP improved scheduling scheme(FBSCI),the priority formula is further improved,the edge user can adapt to each user to improve its scheduling priority.Improved scheduling scheme,adaptively changing the priority,adapting to different quality channel conditions,and further improving the fairness of the system.In order to verify the correctness and feasibility of two schemes,the thesis simulated two schemes on the MATLAB system level platform.Simulated results show that CoMP single user scheduling scheme based on user fairness and CoMP single user improved scheduling scheme based on user fairness can effectively improve system throughput,suppress the interference between cells,overall look at the performance of the cell has been further improved.It compares with the CoMP single user scheduling scheme based on user fairness,the improved scheduling scheme further solves the problem that the edge users are not universally scheduled and adapts to different quality channel conditions,improving the fairness of the system.