A Study on Open-Loop Transmit Power Control for Scalable Cell-Free Networks

Abstract

Toward 6G, cell-free networks (CFN) are attracting attention as a solution to the problem of poor communication quality at the cell edge. In CFN, many access points are densely deployed and cooperatively operated as distributed MIMO systems. In uplink communication in CFN, transmit power control (TPC) is required to mitigate interference and ensure fairness between users. In this paper, we propose an open-loop TPC algorithm for CFN and evaluate its performance by computer simulation. As a result, an improvement of 55.0% in the fifth percentile spectral efficiency is achieved compared to the case without TPC while maintaining a higher average spectral efficiency.