iPhone 6S loses internet connectivity with TP Link Router after 1 Min

Im trying to connect to a TP Link wireless router (TL-WR941ND) with my iphone 6S, the phone will connect to the router and connects to the internet for around a minute, and then cuts out, remaining connected to the router, but no internet access. However my laptop can connect and remain connected to the internet as normal. Is there any way round this?? Thanks