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Regular version of the site

Article

A Tutorial on IEEE 802.11ax High Efficiency WLANs

IEEE Communications Surveys and Tutorials. 2019. Vol. 21. No. 1. P. 197-216.
Khorov E., Kiryanov A., Lyakhov A., Bianchi G.

While celebrating the 21st year since the very first IEEE 802.11 “legacy” 2 Mbit/s wireless Local Area Network standard, the latest Wi-Fi newborn is today reaching the finish line, topping the remarkable speed of 10 Gbit/s. IEEE 802.11ax was launched in May 2014 with the goal of enhancing throughputper-area in high-density scenarios. The first 802.11ax draft versions, namely D1.0 and D2.0, were released at the end of 2016 and 2017. Focusing on a more mature version D3.0, in this tutorial paper, we help the reader to smoothly enter into the several major 802.11ax breakthroughs, including a brand new OFDMAbased random access approach as well as novel spatial frequency reuse techniques. In addition, this tutorial will highlight selected significant improvements (including PHY enhancements, MUMIMO extensions, power saving advances, and so on) which make this standard a very significant step forward with respect to its predecessor 802.11ac