I have the S4 to create a mesh network and provide coverage in an office room extension. WiFi strength is acceptable and I can work effectively but my network connection drops on a 2 hourly basis and I don't know how I can resolve this. The drop is only for around a minute but not great if I'm on a teams call. 
the network connection is still there (no red light) and it seems to be in a 2 hourly cycle from first connection of the day as someone sitting next to me experiences the same but on a different 2 hourly cycle depending on their first connect time!

any ideas (in simple English?). Thanks