Well well well a lot of confusing statements here. What is Mikrotik claiming when they say, they can do 400Mbps on a 40MHz wide 2.4GHz channel?
It looks as something impossible.
https://meraki.cisco.com/blog/2013/08/4 ... t-802-11ac And Mikrotik then naming this "wifiwave2" adds further to the great confusion.
If you look in that MT help file, you see indeed that speed claim. "400Mb/s maximum data rate in the 2.4GHz band for IPQ4019 interfaces"
https://help.mikrotik.com/docs/display/ROS/WifiWave2
Very unexpected, as 802.11ac is not defined for the 2.4GHz band. It is defined for the 5 GHz band. This is about standards and can be found on many places. OK some brands may define their own extensions, but compatibility can be an issue.
https://www.arubanetworks.com/pdf/techn ... nDepth.pdf
Also based on the 802.11n and 802.11ac knowledge and experience , the beacons and MCS definitions are quite different for both protocols.Where 802.11n uses HT MCS (numbered up to MCS23 as the way multistream is defined for n, 802.11ac uses VHT MCS, numbered up to MCS09 per stream.
https://mcsindex.com/.
802.11ac wave2 was an improvement of 802.11ac , but here the 2.4GHz band is still left aside of this standard, as that band is supposed to use 802.11n.
So how can MT claim 400Mbps?? Well the answer may be in the same help file:
Klembord-2.jpg
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They are not running 802.11ac or 802.11 ac wave2 on the 2.4GHz interfaces. The 2.4GHz only got an upgrade from 802.11n (wifi 4) with the 802.11ax (wifi6) standard.
So this wifiwave2 driver (what's in a name?) is not about wifi5 wave 2 , but about wifi 6. Here the MCS rates are defined as HE (not as VHT) Different animal, no 0.4µs SGI, and different rates also when in ax. Not clear what MT is bringing here. And does the client now need to support 802.11ax (wifi6) to be able to connect ???? And if it is 802.11ax then the interface rate is 458.8Mbps, according to MCSINDEX!? Are there other things from 802.11ax available? Why not call it wifi 6 ? If hAP ac3 is a wifi 6 device, it should be all over the marketing documents.
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