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Learn to Stay Cool: Online Load Management for Passively Cooled Base Stations
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computing Science. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Computing Science.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Computing Science. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computing Science.ORCID iD: 0000-0002-6025-3515
Tech Univ Denmark, Dept Engn Technol, Lyngby, Denmark..ORCID iD: 0000-0002-4741-0715
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computing Science. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Computing Science.ORCID iD: 0000-0001-8119-5206
2024 (English)In: 2024 IEEE Wireless Communications and Networking Conference, WCNC 2024, Institute of Electrical and Electronics Engineers (IEEE), 2024, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

Passively cooled base stations (PCBSs) are highly relevant for achieving better efficiency in cost and energy. However, dealing with the thermal issue via load management, particularly for outdoor deployment of PCBS, becomes crucial. This is a challenge because the heat dissipation efficiency is subject to (uncertain) fluctuation over time. Moreover, load management is an online decision-making problem by its nature. In this paper, we demonstrate that a reinforcement learning (RL) approach, specifically Soft Actor-Critic (SAC), enables to make a PCBS stay cool. The proposed approach has the capability of adapting the PCBS load to the time-varying heat dissipation. In addition, we propose a denial and reward mechanism to mitigate the risk of overheating from the exploration such that the proposed RL approach can be implemented directly in a practical environment, i.e., online RL. Numerical results demonstrate that the learning approach can achieve as much as 88.6% of the global optimum. This is impressive, as our approach is used in an online fashion to perform decision-making without the knowledge of future heat dissipation efficiency, whereas the global optimum is computed assuming the presence of oracle that fully eliminates uncertainty. This paper pioneers the approach to the online PCBSs load management problem.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024. p. 1-6
Series
IEEE Wireless Communications and Networking Conference, ISSN 1525-3511
Keywords [en]
Passive cooling, load management, deep reinforcement learning
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:uu:diva-539623DOI: 10.1109/WCNC57260.2024.10571225ISI: 001268569304052ISBN: 9798350303582 (electronic)ISBN: 9798350303599 (print)OAI: oai:DiVA.org:uu-539623DiVA, id: diva2:1902866
Conference
IEEE Wireless Communications and Networking Conference (IEEE WCNC), April 21-24, 2024, Dubai, United Arab Emirates
Funder
Swedish Research CouncilEU, Horizon 2020Available from: 2024-10-02 Created: 2024-10-02 Last updated: 2025-05-07Bibliographically approved
In thesis
1. Selected Topics on Optimal Allocation and Configuration in Mobile Computing for 5G and Beyond
Open this publication in new window or tab >>Selected Topics on Optimal Allocation and Configuration in Mobile Computing for 5G and Beyond
2025 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation explores optimal allocation and configuration in mobile computing for 5G and beyond. As wireless technologies rapidly evolve, emerging technologies such as integrated terrestrial, aerial, and satellite networks (ITASNs), integrated sensing and communication (ISAC), reconfigurable intelligent surfaces (RIS), edge computing, AI-driven networking, cell-free multiple-input multiple-output (MIMO), movable antenna systems, and passively cooled base stations (PCBS) are reshaping network design. These innovations promise significant improvements in capacity, energy efficiency, and sustainability, but also introduce challenges in resource allocation and configuration.

The bulk of this dissertation comprises five research papers that address key resource allocation and configuration problems for some of the evolving technologies. Paper I presents a novel framework for jointly optimizing RIS configuration and resource allocation in multi-cell networks. Paper II investigates content caching in edge computing, proposing a column generation-based approach for balancing cost and data freshness. Paper III examines renewable energy management in edge computing networks to minimize the carbon footprint while maintaining performance. Papers IV and V focus on thermal management in PCBS, with Paper IV developing an online reinforcement learning method for dynamic load allocation in a single base station and Paper V extending this approach to multi-cell scenarios with inter-cell interference and resource coupling.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2025. p. 69
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 2550
Keywords
Mathematical Optimization, Resource Allocation and Configuration, Mobile Networks.
National Category
Computer Sciences
Identifiers
urn:nbn:se:uu:diva-555957 (URN)978-91-513-2505-7 (ISBN)
Public defence
2025-08-22, 101121, Sonja Lyttkens, Ångström, Regementsvägen 10, Uppsala, 13:15 (English)
Opponent
Supervisors
Available from: 2025-06-02 Created: 2025-05-07 Last updated: 2025-06-03

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Yu, ZhanweiZhao, YiYuan, Di

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