The Potential of Full Duplex in Beyond 5G and 6G

Full Duplex or In-band Full Duplex (IBFD) was once touted as a breakthrough technology for 5G. Unfortunately the problem proved far too challenging to solve and there is still research going on how to make it work.

IEEE Communication Society's Full-Duplex and Self-Interference Cancellation Emerging Technologies Initiative (ETI) hosted a panel discussion on Full-Duplex and Self-Interference Cancellation late last year.

The meeting hosts invited talks by industry professionals with deep insights into current standardization activities and leading academic researchers, after which there were discussions on open research challenges and next steps in research and standardization.

The current mission of the emerging technology initiative (ETI) includes promoting of SIC techniques with an emphasis on full-duplex communications for future wireless networks. The scope of the present ETI is to develop SIC and mitigation techniques and to develop technology enablers and associated physical layer and medium access control layer algorithms and radio resource management techniques that facilitate full-duplex communications and SIC techniques in the next generation of wireless systems and, when applicable, in wireline networks.

The agenda was as follows:

  • Welcome message: Dr. Gabor Fodor, Ericsson Research and KTH Royal Institute of Technology, IEEE Full Duplex ETI Chair, Sweden
  • Massive MIMO Subband Full Duplex Technology and 5G NR Prototyping: Dr. Tingfang Ji, Qualcomm Wireless R&D, USA
  • Expectations for Full Duplex for 6G: Dr. Yoshihisa Kishiyama , Manager of the 6G IOWN Promotion Department, NTT DoCoMo, Japan
  • XDD (Cross Division Duplex): Realistic Option for Full Duplex Realization: Dr. Hyoung Ju Ji, Principal Engineer, Samsung Electronics, Korea
  • Massive MIMO Full Duplex: Prof. Ashutosh Sabharwal, Department Chair and Earnest Dell Butcher, Professor of Electrical and Computer Engineering, Rice University, TX, USA
  • In band Full Duplex by Means of Reflected Power: Prof. Besma Smida, University of Illinois at Chicago, IL, USA
  • Full Duplex Integrated Sensing and Communication: D. Sc. (Tech.) Taneli Riihonen, Assistant Prof., Tampere University, Finland
  • Discussion on open research challenges for full duplex communications, next steps in standardization and for the IEEE Full Duplex and Self Interference Cancellation Emerging Technology Initiative

The video of the discussion is embedded as follows:

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