When Wi-Fi connection lost, what's the status, disconnected, limited, connected but no internet? Any IP address obtained?
Wi-Fi connection comes back automatically?
If you forget the network and reconnect, does it work?
Try to change channel to 1, 6 or 11 on web interface of W8970B. You can also change channel width to 20MHz.

i have the same problem sorry for my english but im from spain i buy this router from 2013 and this year start to freezing wireless but strange with cable work fine so,do u have any tp link moderator why,because after 6 or 19 reset from back button work again but when the n i don t know after 2 days happens again ,and again reset from back button and again work so please tell where do u i send to change my router because i have the entire box the tycket were i buy it and all i buy it from internet pccomponentes.com but they don t contest me so any tp link admin contact to me i send aa request to tp link because are too many people with this fail and is a TP LINK FAIL once again sorry for my english i pay a lot of euro and now this problem is very anoyng