hotspot user complain line dropping

hotspot user complain line dropping.
May i know what is the problem?

Maybe your connection actually is dropping? We need more information.

signal strength , calculate Rx Tx its very essential to do your calculation when using wireless internet.. maybe your end-user needs a receiving antenna.

they are getting 50%++ signal.

How to calculate Rx Tx. This should be do the setting at mikrotik router or wireless devices?
I am using UBNT product for wireless access point.