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Wi-Fi Alliance Announces Wi-Fi 6E Moniker for 802.11ax in the 6 GHz Spectrum
The FCC has been considering the opening up of the 6 GHz band (essentially, the 1.2 GHz unlicensed spectrum span just above the currently used 5 GHz band) for unlicensed operation. Wideband unlicensed channels of 160 MHz and more may become essential to achieve expected performance from 802.11ax, 802.11be, 4G LTE, and 5G NR in unlicensed spectrum. Opening up a continuous 1200 MHz chunk will enable substantial amount of new bandwidth over multiple wide bandwidth channels.
Unfortunately, even though there are no currently unlicensed users of the 6 GHz band, certain fixed wireless point-to-point long-range deployments are licensed to utilize it. Wi-Fi platform vendors such as Qualcomm and Broadcom have been confident of working with those users to prevent any interference. Their key message to the licensed incumbents is that any Wi-Fi deployment in the 6 GHz band would use LPI (low-power indoor) operation and can also implement AFC (automated frequency coordination). LPI operation, for example, may impose restrictions on the total EIRP (effective isotropically radiated power) and PSD (power spectral density) for Wi-Fi devices. This will prevent interference due to low power levels and substantial building losses. In addition, most licensed users of the spectrum have their point-to-point endpoints well above the ground (mounted atop towers and buildings), and devices rated for LPI operation are not likely to affect them. AFC involves the maintenance of a database where licensed users are tracked based on their deployment location, and any unlicensed Wi-Fi usage in that spectrum capable of interfering with the licensed users could automatically shift to a different channel.
The Wi-Fi Alliance is introducing a new terminology to distinguish upcoming Wi-Fi 6 devices that are capable of 6 GHz operation - Wi-Fi 6E. This is essentially the benefits of Wi-Fi 6 / 802.11ax (higher performance in terms of faster data rates as well as lower latency) in the 6 GHz band. Wi-Fi 6E devices are expected to make it to the market relatively quickly after regulatory approval, as it only requires changing the antenna tuning / RF front end on existing devices.
802.11be is likely to become Wi-Fi 7 and also operate in the 2.4 GHz, 5 GHz, and 6 GHz bands.
In retrospect, the new Wi-Fi naming scheme is not that bad. Or at least, it's not as bad as USB yet.
Previously: Wi-Fi Alliance Rebrands Wi-Fi Standards
Related: Netgear Introduces its First Wi-Fi 6 (802.11ax) Routers
Intel Launches a Wi-Fi 6 (802.11ax) Wireless Network Adapter
(Score: 2) by fyngyrz on Wednesday January 08 2020, @08:52PM
Definitely not. [fyngyrz.com] That's just a portion of the AM broadcast (medium wave) band here; you can see there's a station that is receivable on every channel (though that's only part of the medium wave band here... this is also true right across the band), and furthermore, if I use phase discrimination like this [youtube.com], there's more than one station per channel that I can pull out and enjoy.
That is why you failed to assess the actual situation correctly.
Except, also no. First, because the AM band has entirely different propagation characteristics than VHF signals do. That makes it entirely impractical for many classes of use during a large portion of the day (and which make it great for listening during those same periods, because you can hear many non-local stations.) Second, because at these wavelengths, the transmitting antennas are relatively large.
Also, somewhat related, because of the propagation characteristics at medium wavelengths, digital broadcasting in these bands doesn't work even close to as well as analog does. There's way too much selective fading, phase shift, and multipath. Digital broadcasting in the medium wave bands has been tried and has been a rousing failure. So the only practical candidates for these wavelengths are analog signals, which in turn pretty much rule out a lot of the use cases where governments and corporations are inclined to be acquisitive. Medium wave is great for voice, pretty good for low-to-moderate-fi music, and downright terrible for data of any kind.
The vast majority of frequency acquisition and expansion is at VHF and above. Much of it well above VHF, in fact. The AM (and shortwave, for that matter) broadcast, utility and ham bands are at comparably little risk of encroachment or replacement for the above reasons.
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What if there were no hypothetical questions?