A Tutorial on IEEE 802.11ax High Efficiency WLANs
A Tutorial on IEEE 802.11ax High Efficiency WLANs
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通讯作者：
E. Khorov;Anton Kiryanov;A. Lyakhov;Giuseppe Bianchi
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作者：
E. Khorov;Anton Kiryanov;A. Lyakhov;Giuseppe Bianchi
在庆祝第一个IEEE 802.11“传统”2mbit /s无线局域网标准问世21周年之际，最新的Wi-Fi新生儿今天到达了终点线，超越了10gbit /s的惊人速度。IEEE 802.11ax于2014年5月推出，旨在提高高密度场景下的单位面积吞吐量。第一个802.11ax草案版本，即D1.0和D2.0，分别于2016年底和2017年底发布。在本教程中，我们将重点介绍更成熟的D3.0版本，帮助读者顺利进入802.11ax的几个主要突破，包括全新的基于ofdma的随机接入方法以及新颖的空间频率重用技术。此外，本教程将重点介绍一些重要的改进（包括PHY增强、MU-MIMO扩展、节能改进等），这些改进使该标准相对于其前身802.11ac迈出了非常重要的一步。
—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 throughput-per-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 OFDMA-based random access approach as well as novel spatial frequency reuse techniques. In addition, this tutorial will highlight selected significant improvements (including PHY enhancements, MU-MIMO extensions, power saving advances, and so on) which make this standard a very significant step forward with respect to its predecessor 802.11ac.