Whilst this problem appears to be device specific (other tablets, PC's, Mac, and phones) are OK it appears to have some connection to this router and firmware. I have another RT-N66U router running dd-wrt and this problem does not occur (although that is at another location).
You can search on Google and find lots of complaints about Google Nexus WiFi problems after upgrading from the early versions of Android Kit Kat. And that was a big mistake on my part because I've had problems ever...
Google Nexus Tablet wireless drops in RT-N66U 378.56.2
You can search on Google and find lots of complaints about Google Nexus WiFi problems after upgrading from the early versions of Android Kit Kat. And that was a big mistake on my part because I've had problems ever...
Google Nexus Tablet wireless drops in RT-N66U 378.56.2