IEEE 802.11be

IEEE 802.11be Extremely High Throughput (EHT) is the potential next amendment of the 802.11 IEEE standard.,[1] and will likely be designated as Wi-Fi 7.[2][3] It will build upon 802.11ax, focusing on WLAN indoor and outdoor operation with stationary and pedestrian speeds in the 2.4, 5 and 6 GHz frequency bands.[4]

Development of the 802.11be amendment is ongoing, with a goal of an initial draft by March 2021, and a final version expected by early 2024.[3]

Candidate features

The main candidate features that have been mentioned in 802.11be Project Authorization Request (PAR) are:[5]

  • 320 MHz bandwidth and more efficient utilization of non-contiguous spectrum,
  • Multi-band/multi-channel aggregation and operation,
  • 16 spatial streams and Multiple Input Multiple Output (MIMO) protocols enhancements,
  • Multi-Access Point (AP) Coordination (e.g. coordinated and joint transmission),
  • Enhanced link adaptation and retransmission protocol (e.g. Hybrid Automatic Repeat Request (HARQ)),
  • If needed, adaptation to regulatory rules specific to 6 GHz spectrum,
  • Integrating Time-Sensitive Networking (TSN) extensions for low-latency real-time traffic (IEEE 802.11aa).[6]

Additional features

Apart from the features mentioned in the PAR, there are newly introduced features:[7]

  • Newly introduced 4096-QAM (4K-QAM),
  • Contiguous and non-contiguous 320/160+160 MHz and 240/160+80 MHz bandwidth,
  • Frame formats with improved forward-compatibility,
  • Enhanced resource allocation in OFDMA,
  • Optimized channel sounding that requires less airtime,
  • Implicit channel sounding,
  • More flexible preamble puncturing scheme,
  • Support of direct links, managed by an access point.

References
  1. "IEEE P802.11 EXTREMELY HIGH THROUGHPUT Study Group". www.ieee802.org. Retrieved 2019-05-20.
  2. Shankland, Stephen (2019-09-03). "Wi-Fi 6 is barely here, but Wi-Fi 7 is already on the way - With improvements to Wi-Fi 6 and its successor, Qualcomm is working to boost speeds and overcome congestion on wireless networks". CNET. Retrieved 2020-08-20.
  3. Khorov, Evgeny (2020-05-08). "Current Status and Directions of IEEE 802.11be, the Future Wi-Fi 7". IEEE. Retrieved 2020-08-20.
  4. López-Pérez, David (12 Feb 2019). "IEEE 802.11be - Extremely High Throughput: The Next Generation of Wi-Fi Technology Beyond 802.11ax". arXiv:1902.04320 [cs.IT].
  5. "802.11be Project Authorization Request (PAR)".
  6. https://datatracker.ietf.org/meeting/106/materials/slides-106-raw-04-ieee-status-00
  7. E. Khorov, I. Levitsky, I. F. Akyildiz (2020). "Current Status and Directions of IEEE 802.11be, the Future Wi-Fi 7". IEEE Access. IEEE. 8 (in press): 88664–88688. doi:10.1109/ACCESS.2020.2993448.CS1 maint: uses authors parameter (link)
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