A Novel User Association and Power Control Algorithm for Cell-free Massive MIMO

Sanyasi Vishnu Vardhan Rachuri, Gilberto Berardinelli*

*Corresponding author for this work

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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Abstract

The vision of Industry 4.0 relies on advancements in wireless solutions; cell-free Massive Multiple Input Multiple Output (cf-mMIMO) is emerging as a promising physical layer technology for fifth-generation (5G) and beyond 5G technologies. However, industrial applications often demand varied and conflicting Quality-of-Service (QoS) requirements, and finding an optimal and scalable resource allocation strategy is challenging. This paper proposes a novel user association and power control algorithm to minimize the overall uplink (UL) transmit power while ensuring a given spectral efficiency (SE) requirement. The proposed solution identifies the best schedulable users to maximize the number of satisfied users without relying on instantaneous channel state information. Moreover, it adopts a game theory-based power control algorithm to minimize the total uplink power while ensuring the spectral efficiency requirement. Numerical results have shown significant gains in the number of satisfied users. A maximum gain of up to $15\%$ is observed for a low SE requirement (0.25 bits/s/Hz), increasing to $50\%$ for a SE requirement of 0.75 bits/s/Hz. Furthermore, the proposed solution has shown a great adaptability to varying requirements with respect to state-of-the-art schemes.
Original languageEnglish
Title of host publicationIEEE International Mediterranean Conference on Communications and Networking (MeditCom) 2024
Publication statusAccepted/In press - May 2024

Keywords

  • 5G
  • Beyond 5G (B5G)
  • Industry 4.0
  • cell-free massive MIMO
  • User association
  • Power Control

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