Wi-Fi 6 (Formerly IEEE 802.11ax) Deep Dive
Talkat Embedded Linux Conference @ Open Source Summit North America 2022 · on Friday, 2022-06-24· at 14:00· Room 201/202 (Level 2), JW Marriott Austin, 110 E 2nd Street Austin, TX 78701·
summary
Wi‑Fi 6 raises capacity by splitting spectrum into OFDMA resource units so one frame serves multiple users, adds 1024‑QAM for ~25% peak rate gains, and enables up/downlink MU‑MIMO so APs can reach 12‑stream AP capacity (eight 5 GHz + four 2.4 GHz). It brings TWT for lower power, BSS coloring for dense reuse, and WPA3 with DPP provisioning plus GCMP‑256. Practical notes: MediaTek MT7915/MT7911 support in OpenWrt exists but vendor firmware often lacks NAND ECC (UBI installer fixes this); Intel AX210 is flaky on ARM, MediaTek MT7921 shows best x86 throughput.
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chapters (6)
- 0:00Introduction and agenda
- 2:01Key concepts of Wi-Fi 6
- 14:06Security enhancements
- 19:31OpenWRT router hardware
- 33:57Wi-Fi 6 client devices
- 39:25Performance and conclusions
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