hello,
I have this problem, on every mikrotik release on mikrotik sistem of some routerbord in the log I have this messagge sometime:
33:AE:44:3W:67:54@wlan1: disconnected, extensive data loss
Why? for me it is a big problem also for videosurvillance sistem. Hoh I can do it for don't have this disconnection of wlan?
best regards

I answered on your other post in General topic
http://forum.mikrotik.com/viewtopic.php?f=2&t=25738