A Brief History of Wi-Fi Standards
Wi-Fi standards have been evolving since the late 1990s. Each generation brings improvements in speed, range, and the ability to handle more connected devices simultaneously. The naming used to be confusing (802.11a, 802.11ac…), so the Wi-Fi Alliance introduced cleaner generation names — hence Wi-Fi 5, Wi-Fi 6, and Wi-Fi 6E.
What Is Wi-Fi 6?
Wi-Fi 6 (technically IEEE 802.11ax) is the sixth generation of the Wi-Fi standard. Released in 2019, it was designed not just to be faster than Wi-Fi 5, but to be smarter — particularly in environments packed with many devices, like offices, apartments, stadiums, and smart homes.
Key Technologies Behind Wi-Fi 6
OFDMA (Orthogonal Frequency Division Multiple Access)
This is arguably the most important improvement. Wi-Fi 5 sent data to one device at a time per channel. OFDMA allows a single transmission to carry data for multiple devices simultaneously by dividing a channel into smaller sub-channels. Think of it as upgrading from a single-lane road to a multi-lane highway.
MU-MIMO (Multi-User, Multiple Input, Multiple Output)
Wi-Fi 6 expands MU-MIMO from 4 streams (Wi-Fi 5) to 8 simultaneous streams. This means the router can communicate with more devices at the same time without them having to wait in a queue.
BSS Coloring
In dense environments, overlapping wireless signals from neighbouring networks can cause interference. BSS Coloring allows routers to tag their transmissions, so devices can identify and ignore interference from nearby networks more effectively.
Target Wake Time (TWT)
Devices can now negotiate scheduled "wake" times with the router, meaning they don't have to constantly listen for signals. This significantly improves battery life on smartphones, IoT sensors, and smart home devices.
Wi-Fi 6 vs Wi-Fi 5: At a Glance
| Feature | Wi-Fi 5 (802.11ac) | Wi-Fi 6 (802.11ax) |
|---|---|---|
| Max Theoretical Speed | ~3.5 Gbps | ~9.6 Gbps |
| Frequency Bands | 5 GHz only | 2.4 GHz + 5 GHz |
| MU-MIMO Streams | 4 downlink | 8 up & downlink |
| Multi-Device Efficiency | Moderate | Significantly improved |
| Battery Efficiency (IoT) | Standard | Improved (TWT) |
What About Wi-Fi 6E?
Wi-Fi 6E extends the same Wi-Fi 6 technology into the 6 GHz frequency band, which was previously unavailable for Wi-Fi. This opens up a much less congested spectrum, reducing interference dramatically. It's particularly useful in dense urban areas but requires both a 6E-compatible router and device.
Do You Actually Need Wi-Fi 6?
If you have a household with many devices — smart TVs, phones, tablets, smart speakers, laptops, gaming consoles — Wi-Fi 6 will noticeably improve the consistency of your connection. The real-world speed gains over Wi-Fi 5 are modest for a single device, but the benefit grows significantly as more devices compete for bandwidth.
If you're upgrading your router anyway, choosing a Wi-Fi 6 model is a sensible future-proof choice. If your current setup works well and you have few connected devices, there's no urgent need to upgrade immediately.
Summary
- Wi-Fi 6 is designed for dense, multi-device environments more than raw speed.
- Key innovations: OFDMA, MU-MIMO 8x8, BSS Coloring, and Target Wake Time.
- Wi-Fi 6E adds the 6 GHz band for even less congestion.
- Both your router and device need to support Wi-Fi 6 to benefit from it.