Energy Reduction in Cell-Free Massive MIMO through Fine-Grained Resource Management
CoRR(2024)
Abstract
The physical layer foundations of cell-free massive MIMO (CF-mMIMO) have been
well-established. As a next step, researchers are investigating practical and
energy-efficient network implementations. This paper focuses on multiple sets
of access points (APs) where user equipments (UEs) are served in each set,
termed a federation, without inter-federation interference. The combination of
federations and CF-mMIMO shows promise for highly-loaded scenarios. Our aim is
to minimize the total energy consumption while adhering to UE downlink data
rate constraints. The energy expenditure of the full system is modelled using a
detailed hardware model of the APs. We jointly design the AP-UE association
variables, determine active APs, and assign APs and UEs to federations. To
solve this highly combinatorial problem, we develop a novel alternating
optimization algorithm. Simulation results for an indoor factory demonstrate
the advantages of considering multiple federations, particularly when facing
large data rate requirements. Furthermore, we show that adopting a more
distributed CF-mMIMO architecture is necessary to meet the data rate
requirements. Conversely, if feasible, using a less distributed system with
more antennas at each AP is more advantageous from an energy savings
perspective.
MoreTranslated text
Key words
Cell-free Massive MIMO,Energy Consumption,Data Rate,Optimization Algorithm,Energy Conservation,User Equipment,Data Rate Requirements,Downlink Data,Alternating Optimization Algorithm,Optimization Problem,Energy Efficiency,Power Consumption,Analog-to-digital Converter,Energy Model,White Rabbits,Mixed-integer Programming,Power Amplifier,Industrial Environment,Fading Channel,Spectral Efficiency,Static Random Access Memory,Minimum Mean Square Error,Large-scale Fading,Random Access Memory
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined