By Dr. Jacob Sharony, Mobius Consulting — June 2026
Wi-Fi has gone through two major generational changes in the past few years. Wi-Fi 6 (IEEE 802.11ax), published as IEEE Std 802.11ax-2021, re-architected how Wi-Fi shares the channel among many users. Wi-Fi 7 (IEEE 802.11be), approved by IEEE in September 2024 and published as IEEE Std 802.11be-2024 in July 2025 — with Wi-Fi Alliance certification under way since January 2024 — builds on that foundation with wider channels, denser modulation, and, most significantly, the ability to use multiple bands at once. This article summarizes what actually changed, and why those changes matter both to product designers and to patent litigators.
Wi-Fi 6 (802.11ax): From Faster Links to Smarter Sharing
Earlier Wi-Fi generations (through 802.11ac / Wi-Fi 5) mostly pushed single-user peak rates. Wi-Fi 6 instead optimized efficiency in dense environments:
- OFDMA (Orthogonal Frequency-Division Multiple Access) — the channel is divided into resource units (26 to 996 tones) so an access point can serve many clients in one transmission opportunity, downlink and uplink. This brought cellular-style scheduling into Wi-Fi.
- Uplink and downlink MU-MIMO — up to 8 spatial streams shared across users.
- 1024-QAM and a 4× longer OFDM symbol (12.8 µs, 78.125 kHz subcarrier spacing) — about 25% higher peak rates and better outdoor robustness, with a theoretical maximum of about 9.6 Gb/s.
- BSS Coloring and spatial reuse — neighboring networks can transmit concurrently instead of deferring to each other.
- Target Wake Time (TWT) — negotiated wake schedules that dramatically cut power consumption for IoT clients.
- Wi-Fi 6E — the same protocol extended into the 6 GHz band (1,200 MHz of new spectrum in the U.S. since 2020), with WPA3 security mandatory.
Wi-Fi 7 (802.11be): Extremely High Throughput
Wi-Fi 7 — formally "Extremely High Throughput" (EHT) — raises the ceiling again and attacks latency:
- 320 MHz channels in the 6 GHz band — double the maximum width of Wi-Fi 6.
- 4096-QAM (4K-QAM) — 12 bits per symbol, a further ~20% rate increase, with theoretical peak PHY rates up to 46 Gb/s versus 9.6 Gb/s for Wi-Fi 6.
- Multi-Link Operation (MLO) — the headline feature: a device can associate and exchange traffic over multiple bands/links (e.g., 5 GHz and 6 GHz) simultaneously, for throughput aggregation, lower latency, and rapid failover. MLO required rethinking association, security, power save, and block acknowledgment across links.
- Multi-RU assignment and preamble puncturing — a client can be scheduled on multiple resource units, and wide channels remain usable even when part of the band is occupied or restricted.
- Restricted TWT — protected service periods for latency-sensitive traffic (AR/VR, industrial control, gaming).
- 512-MPDU block ack and 16 spatial-stream signaling — headroom for future implementations (today's products implement up to 8 streams).
Wi-Fi 6 vs. Wi-Fi 7 at a Glance
| Feature | Wi-Fi 6 / 6E (802.11ax) | Wi-Fi 7 (802.11be) |
|---|---|---|
| IEEE publication | 2021 (802.11ax-2021) | July 2025 (802.11be-2024) |
| Max channel width | 160 MHz | 320 MHz |
| Max modulation | 1024-QAM | 4096-QAM |
| Theoretical peak rate | ~9.6 Gb/s | up to ~46 Gb/s |
| Multi-band operation | One link at a time | Multi-Link Operation (MLO) |
| Scheduling | OFDMA, single RU per client | OFDMA with Multi-RU per client |
| Latency tools | TWT | Restricted TWT, MLO failover |
What Comes Next: Wi-Fi 8
IEEE Task Group 802.11bn ("Ultra High Reliability," Wi-Fi 8) is already well under way: Draft 1.0 has completed its first ballot, Draft 2.0 is expected to go to ballot in mid-2026, and final approval is targeted for 2028. The emphasis shifts from peak speed to reliability — seamless roaming, multi-AP coordination, and consistent latency. Each generation's draft history, working-group submissions, and comment resolutions become part of the permanent technical record.
A Litigation Perspective
Every one of these feature transitions has consequences in patent disputes:
- New features attract new assertions. OFDMA scheduling, TWT power save, spatial reuse, and now Multi-Link Operation each map to large patent families. MLO in particular touches association, security, and scheduling at once, and is likely to be heavily litigated as Wi-Fi 7 products proliferate.
- The standard is evidence. Infringement theories against Wi-Fi products typically map claims to IEEE 802.11 mandatory behavior plus Wi-Fi Alliance certification; whether a feature is mandatory, optional, or merely certified matters enormously.
- Drafts and submissions are prior art. 802.11 task group drafts, member submissions, and meeting minutes are dated, publicly accessible documents — often decisive prior art in IPR proceedings against later-filed patents.
Dr. Jacob Sharony has served as an expert in numerous Wi-Fi and IEEE 802.11 patent matters, including thirteen IPR proceedings involving 802.11 technology. See Wi-Fi / IEEE 802.11 Patent Expert Witness, IPR / PTAB Wireless Patent Expert Witness, and previous testimony and engagements, or contact Mobius Consulting.