6E is basically Wifi 6, but with the important distinction that it operates in the 6 Ghz band. 6 Ghz is important because 1, there aren't many incumbent devices that will interfere with Wifi meaning better speeds, but the second and more important point is that you can finally run 160 Mhz channels cleanly without interruption. With 5Ghz, if you try to run a 160 Mhz channel, due to the limited spectrum available, you will have to operate within the DFS bands. Running 160 Mhz is important because with 80 Mhz channels, a typical 2x2 wifi6 chip inside your computer will connect at 1.2 Gbps. But with 160 Mhz channels, you will get a 2.4 Gbps connection, meaning your actual wifi speeds (upload and download) can exceed the speed of 1 gbps wired LAN connection!Does 6E offer even less latency than regular wifi6? If so, that would be big for the future of VR/AR
DFS means dynamic frequency selection, which is a mechanism codified into law across the globe to protect RADAR from Wifi. In order for any router to certified for operation within the USA (and various countries), the FCC mandates that the company show that if the router detects radar, it will vacate the DFS channel immediately. So say you're on a Zoom call, your router is set to the 160 Mhz mode, and while you're talking on your call, the airport or military uses the same radar channel as your wifi. Boom! You're kicked off... and you have to wait while the router sets up shop another channel.
Running 160 Mhz on the 5 Ghz band is unstable because your router can be kicked off at any time without your intervention or control if it "detects" radar. The radar "detection" may even be a false positive, but the router will still hop to another frequency regardless. This cycle can go on indefinitely as long as the router is on a DFS channel. Just depends on if you have radar in your radio environment. This is frustrating because your connection to the internet can drop in and out while the router is hopping to another frequency. This is terrible for real-time applications such as calls, etc.
But with 6 Ghz, there is no such problem, as there will be no DFS mechanism. I presume that the weather band and military radar don't operate within 6 Ghz. So you can operate 160 Mhz within the 6 Ghz band cleanly and without any interruption. And get maximum speed. And when Wifi 7 comes, 802.11be, we will get 320 Mhz channels for even more maximum speeds. Also, 6 Ghz will bring a ton more bandwidth to Wifi. There will be more frequency bands available to wifi in the 6 Ghz band than the 5 Ghz and 2.4 Ghz bands combined. 6 Ghz is probably the biggest update to wifi in 20 years.
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