Research On Interference Coordination Technology For Millimeter Wave Massive MIMO Network

As one of the most promising key technologies in the realization of 5G networks,millimeter wave communication technology has received more and more attention and research.At the same time,due to the fusion and symbiosis relationship presented by the three technologies of millimeter wave communication,massive MIMO,and ultradense networks,major organizations have also jointly proposed the reasonable introduction of these three technologies in mobile communication systems to achieve 5G and improve spectrum efficiency.And energy efficiency vision.In millimeter-wave massive MIMO communication networks,through the use of directional beamforming,millimeter-wave base stations can support multi-beam parallel transmission,so there must be interference between millimeter-wave users during the multi-beam parallel transmission process,which seriously affects the millimeter-wave network performance.This article focuses on the interference coordination technology in millimeter-wave massive MIMO networks.The main work is as follows:First,taking the single-cell multi-user millimeter-wave massive MIMO system as the research goal,in order to optimize the total data rate,under the actual condition that the number of RF chains is less than the number of users,a beam assignment algorithm based on one-to-one matching game is proposed.Because some users have beam nonorthogonal interference with each other,some users have low data rates.In order to maintain the total data rate and increase the single data rate of users suffering from inter-beam interference,to ensure user satisfaction,This article also proposes an adaptive frequency reuse scheme.The simulation results show that the proposed algorithm effectively improves the overall throughput of the system while ensuring user satisfaction in the system.Secondly,for the millimeter-wave heterogeneous network scenario based on massive MIMO(multi-cell multi-user),this paper proposes a beam interference coordination scheme for a global millimeter-wave heterogeneous network.First,the proposed beam switching scheme and interference tolerable beam selection scheme are used to perform beam non-orthogonal interference coordination for all non-orthogonal users in all millimeter-wave small cells in the network,and then the remaining in all millimeter-wave small cells Non-orthogonal users who cannot perform beam parallel transmission use the beam switching scheme and the interference tolerant beam selection scheme to decide whether to access other millimeter wave small cells or macro base stations in the network.The system simulation results show that the proposed global interference coordination scheme under heterogeneous networks can effectively improve the system's total reachable rate and user satisfaction compared with other schemes.The main work of this paper is the design of the interference coordination scheme and the corresponding simulation verification in the millimeter-wave massive MIMO network,In the future,further research work will focus on reducing the computational complexity of the algorithm,while considering other wireless resources such as computing The algorithm proposed by the combination of resources and time resources is designed.