A Study of User Selection Method for Access Control Scheme on Multi-Beam Massive MIMO System

Multi-user multiple input multiple output (MU-MIMO) and massive MIMO transmission techniques can perform high-speed and simultaneous transmissions in wireless communications. However, transmission technologies need channel state information (CSI) feedback for channel estimation. CSI feedback decreases transmission efficiency owing to the overhead of access control for frame exchange. In related work, multi-beam massive MIMO transmission with CSI feedback elimination was proposed to resolve this issue. In this paper, we proposed an access control scheme for multibeam massive MIMO transmission called the overhead less access control scheme and studied a user selection method for fairness for terminals. We confirmed that the proposed access control with user selection scheme obtains a transmission efficiency of 90% or more.