17th AIAI 2021, 25 - 27 June 2021, Greece

Power Control in 5G Heterogeneous Cells considering User Demands using Deep Reinforcement Learning

Anastasios Giannopoulos, Sotirios Spantideas, Christos Tsinos, Panagiotis Trakadas

Abstract:

  Heterogeneous cells have been emerged as the dominant design approach for the deployment of 5G wireless networks. In this context, inter-cell interferences are expected to drastically affect the 5G targets, especially in terms of through-put experienced by the mobile users. This work proposes a novel Deep Rein-forcement Learning (DRL) scheme, targeting at minimizing the difference be-tween the allocated and requested user throughput through power regulation. The developed algorithm is employed in heterogeneous cells that are controlled in a centralized manner and validated for 5G-compliant channel models. First, the proposed learning framework of the DRL method is presented, mainly in-cluding the stabilization of the learning-related hyperparameters. Then, the DRL method is evaluated for several simulation scenarios and compared to well-established optimization methods for power allocation, namely the Water-filling and Weighted Minimum Mean Squared Error (WMMSE) algorithms, as well as a fixed power control scheme. The evaluation outcomes demonstrate the ability of the DRL framework in accurately approaching the user requirements, where-as the Water-filling and WMMSE solutions present large deviations from the user demands since they aim at the total network-wide throughput maximiza-tion.  

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