User-centric Handover in mmWave Cell-Free Massive MIMO with User Mobility

Abstract

The coupling between cell-free massive multiple-input multiple-output (MIMO) systems operating at millimeter-wave (mmWave) carrier frequencies and user mobility is considered in this paper. First of all, a mmWave channel is introduced taking into account the user mobility and the impact of the channel aging. Then, three beamforming techniques are proposed in the considered scenario, along with a dynamic user association technique (handover): starting from a user-centric association between each mobile device and a cluster of access points (APs), a rule for updating the APs cluster is formulated and analyzed. Numerical results reveal that the proposed beamforming and user association techniques are effective in the considered scenario.

Paper accepted for publication in the proceedings of the 2021 European Signal Processing COnference (EUSIPCO), 23-27 August 2021, Dublin, Ireland

References in corpus (3)

• White Paper on Broadband Connectivity in 6G
• Energy-Efficient Power Control in Cell-Free and User-Centric Massive MIMO at Millimeter Wave
• Energy-Efficient Access-Point Sleep-Mode Techniques for Cell-Free mmWave Massive MIMO Networks With Non-Uniform Spatial Traffic Density