Currently using a Sony 570 blu-ray player to stream netflix wirelessly to a television one room over from the N router. I'm using Cox cable. During the day, streaming of movies, series shows, anything, just couldn't be better. During the night, however, it's pretty much unwatchable. Occasionally, we can get 5 minutes into a show before it stops and buffers. We're then able to watch maybe a minute before it stops and buffers again.
No point in pointing fingers at Cox, which may or may not have overloaded nodes at night, or even the Sony player, which may or may not have less-then-perfect wireless. A wired solution is not viable for me.
Since I already have the N router (D-Link 655), my question is what other things could I try to improve the nightly signal. Would a powerline adapter improve the situation (and, if so, which one)? Are there settings I should be making to the router which might improve the constant buffering situation at night? Appreciate any not-too-technical insight/advice.