1. Use a current RoS
2. Set tx power to 17dBm
3. Use Channel width=20MHz - 20/40MHz is not universally accepted by all devices and uses a lot of spectrum
4. Set distance=indoors
5. Disable TKIP in your security profiles - it limits speed to 54Mbps
6. Set ht-tx-chain=0,1 and ht-rx-chain=0,1 where supported
7. Set Guard Interval=long - allows for slower devices
This has given us stability and happy users.
Handheld devices will look at the signal from an AP and if it is really strong reduce their own power to conserve battery. The result is they may then not have sufficient signal to reach the AP, especially if it's running at 30dBm
It is best to match your AP capability to that of the devices it serves. So a really strong AP signal may not be serving you well if your client device cannot communicate back to it. It is better to have more low power AP's than 1 big one.
Tablets and iPhones disconnect when they go into standby mode - their wireless shuts down when not in use. Expect frequent re-connections from them.
Lastly, if you are running multiple 2.4 GHz AP's at a site stagger them on channel's 1,6 and 11.
And once you are running reliably you can then "tweak" the settings to see what works best for you.
--fonte: https://forum.mikrotik.com/viewtopic.php?f=3&t=60636&start=100#p452334
referencia: https://gryzli.info/2015/06/20/mikrotik-optimizing-wi-fi-performance/
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