A Tutorial on IEEE 802.11 ax High Efficiency WLANs

作者：Khorov, Evgeny^*; Kiryanov, Anton; Lyakhov, Andrey; Bianchi, Giuseppe

来源：IEEE Communications Surveys and Tutorials, 2019, 21(1): 197-216.

DOI：10.1109/COMST.2018.2871099

• Wireless LAN
• quality of service
• OFDM
• IEEE 802.11 ax
• high efficiency WLANs
• Wi-Fi
• dense deployment
• OFDMA
• UL MU-MIMO

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 802.11 ax was launched in May 2014 with the goal of enhancing throughput-per-area in high-density scenarios. The first 802.11 ax 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 802.11 ax breakthroughs, including a brand new orthogonal frequency-division multiple access-based random access approach as well as novel spatial frequency reuse techniques. In addition, this tutorial will highlight selected significant improvements (including physical layer enhancements, multi-user multiple input multiple output extensions, power saving advances, and so on) which make this standard a very significant step forward with respect to its predecessor 802.11 ac.

• 出版日期2019