Experience between ac and n

RouterOS Wireless Networking
1

Hello everyone I would like to share the experience I had while migrating to AC.

I have a tower where I have a sector with netmetal (mipsbe) plus a horn RF-elements with only 3 clients SXTsq AC (ARM), the spectrum is clean and even the sector transport up to 200Mbps without problem. Signals of clients are also perfect 45-50dBm with 100%CCQ.

Use 802.11 pure with rts / cts on clients with 0 threshold and cts to self in AP.
With a width of 40Mhz, in N when I test the three clients simultaneously they get their 30Mbps and when I do it in both directions limiting upload to 5Mbps it also works without problems and well with CCQ almost 100% all the time. Works like a charm when sets MCS-15 manually, if left default fail like in AC.
But when switching to AC if I do the test to send data only there is no problem and they get their 30Mbps but if I do in both directions the CCQ falls below 10% and the speeds do not rise from 5-8Mbps.

Is it ARM problem? Any advice?
For now I have it in N and it works wonderful.

2

802.11 n or AC is irrelevant for this type of traffic. RTS / CTS will not help. You need the real TDMA protocol. U can try mikrotik NV2 works well for 5-10 device. Or buy cambium & elevate miktotik OLD 802.11N 600Mhz SXT / LHG.

3

Yeah I know this options, but like I said I can work perfect if I set fix MCS15 and N and works really really good.
Now I stay in N and keep working with mikrotik, hope that work hard on NV2.

Thanks for advice.