[Hardware] 4x4 Multi-User MIMO 802.11ac Wave 2 Acces Point

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Status: Implemented

You are probably already working on it, but what I would like to see is a new, high-end access point based on the definitive 802.11ac specification (a.k.a. a Wave 2 AP). It would be awesome if it did support Multi-User MIMO and 4 spatial streams using a 4x4 MIMO set-up. It's already available in routers like Asus RT-AC87U and the Netgear R7500.


With this standard it would be possible to have a link speed of 1,733 Mb/s on the 5GHz band using 80MHz 802.11ac channels, and 800 Mb/s with 256-QAM on 2,4GHz and 5GHz using 40MHz 802.11n channels. This total potential link speed of 2533 Mb/s could be distributed over up to 8 client using Multi-User MIMO. It would also be awesome to see a cheap 802.11ac access point, with 2x2 MIMO support on both frequencies. So you would get a line-up like this:


  • New: UniFi AP AC Pro: 2,4GHz 4x4 MU-MIMO 802.11n, 5GHz 4x4 MU-MIMO 802.11ac (2533 Mb/s)
  • UniFi AP AC: 2,4GHz 3x3 MIMO 802.11n, 5GHz 3x3 MIMO 802.11ac (1750 Mb/s)
  • UniFi AP Pro: 2,4GHz 3x3 MIMO 802.11n, 5GHz 2x2 MIMO 802.11n (750 Mb/s)
  • New: UniFi AP AC Entry: 2,4GHz 2x2 (MU-)MIMO 802.11n, 5GHz 2x2 (MU-)MIMO 802.11ac (1167 Mb/s or 1267 Mb/s)
  • UniFi AP Long-Range: 2,4GHz 2x2 MIMO 802.11n (300 Mb/s)
  • UniFi AP: 2,4GHz 2x2 MIMO 802.11n (300 Mb/s)


With the addition of these two access points I think you have a very appealing line-up. Multi-User MIMO is gonna be huge in the coming year, with al new Qualcomm smartphones and tablets already supporting it and almost all other vendors working on it. 


So Multi-User MIMO, 256-QAM modulation and 4 spatial streams all in both bands, priced between $350 and $400, that is what I would love to see in a new UniFi access point. This plus a new entry 802.11ac access point with as much features a you can cram in for $150-$200. But that is just my opinion, I would love to hear others and maybe Ubiquiti can provide a sneak peak on the new hardware which I'm sure they're working on Man Happy.

on ‎03-22-2015 11:37 AM

What would be even nicer would be if they could do it for $100 per AP or less - give it the same ubiquity (pun definitely intended) as the standard UAP.

on ‎03-28-2015 06:44 AM
$100 entry AC would be amazing. Also, getting handoff working would be excellent.
on ‎04-15-2015 07:59 AM

two distinct 802.11ac products are needed - a full function 4 x 4 MU-MIMO all singing and dancing heavy duty AP


and an aggressively priced 2 x 2 that meets regulatory requirements for mass deployment ( one per room)


for many purposes, the fully featured version is ovrkill, but if you do need everything, it must be available.



on ‎06-05-2015 12:13 PM

as Uberseehandel says. An inexpensive UAP-AC for ~$100 with 2x2 MIMO, and a UAP-AC-Pro with 4x4 MIMO.

on ‎06-13-2015 03:28 PM

Of course to make full use of this we're going to need 3x or 4x gigabit ethernet ports with LAG, or (gasp) 10GbE. The practical implications of passing the gigabit barrier aren't small.

on ‎06-13-2015 03:42 PM

A single 1Gb ethernet port is sufficient for best-case 3x3 in 80Mhz at 1.3Gbps - overhead.  By the time you add just a couple client radios that have <=80% signal then 4x4 in 80Mhz is below 1Gb throughput.


Realistically, not many businesses  will run a 'business/enterprise' AP in 80Mhz because you can only have 1.  3x3 or 4x4 in 20Mhz is MUCH more attractive for about 95% of the target audience.  In business the MU-MIMO improving SNR and the lower MAC overhead are the obvious improvements 802.11AC brings.

by Ubiquiti Employee
on ‎06-28-2015 04:35 PM
Status changed to: Under Consideration
on ‎06-28-2015 10:55 PM

To ensure there is sufficient backhaul capacity, aggregate 2 1Gb ethernet cables, as some others do. The UniFi switches are all capable of being configured for this purpose.

on ‎03-28-2016 01:41 PM

Adding my +1 to this idea.


What would be amazing, though I don't know if the spec allows it, would be to create "executive priorities" on the MU-MIMO array. Say if MAC address X connects it gets a guaranteed 2x2 MIMO array for its connection


As for how to connect to it, NBase-T....



on ‎03-28-2016 01:48 PM

They already redid the lineup recently, and while I'd love to see Wave 2... I don't think you'll hear about it for awhile. Could be wrong...