Wireless problem

Hey everyone. Just got myself a new macbook pro retina 13" (A1502).
I have a problem with my wireless network (only at home). when I'm connected to my router, and i don't use the internet for let's say 10-20 secs, the connection stop working. in the wireless icon on the top-right corner of the screen it shows it still connected, but the internet is just not working until i turn it off and on again. as long as there's bandwidth, it dosent shut.. I can download something for 10 hours and everything keeps working..
-That problem is only at my house, at my work the internet works good.
-BUT, other computers seem to work just fine with my home router..

any ideas?

 

Same Page with you

My version is also 10.10.1
and according to my memory it was ok before.... 95% sure..

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I'm using d-link 2760u router. any suggestion? what should i do?