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Cell-free mMIMO Support in the O-RAN Architecture: A PHY Layer Perspective for 5G and Beyond Networks
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  • Vida Ranjbar ,
  • Adam Girycki, ,
  • Md Arifur Rahman ,
  • Sofie Pollin ,
  • marc moonen ,
  • Evgenii Vinogradov
Vida Ranjbar
KU Leuven, KU Leuven

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Adam Girycki,
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Md Arifur Rahman
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Sofie Pollin
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marc moonen
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Evgenii Vinogradov
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To keep supporting next-generation requirements, the radio access infrastructure will increasingly densify. Cell-free (CF) network architectures are emerging, combining dense deployments with extreme flexibility in allocating resources to users. In parallel, the Open Radio Access Networks (O-RAN) paradigm is transforming RAN towards an open, intelligent, virtualized, and fully interoperable architecture. This paradigm brings the needed flexibility and intelligent control opportunities for CF networking. In this paper, we document the current O-RAN terminology and contrast it with some common CF processing approaches. We then discuss the main O-RAN innovations and research challenges that remain to be solved.
Mar 2022Published in IEEE Communications Standards Magazine volume 6 issue 1 on pages 28-34. 10.1109/MCOMSTD.0001.2100067