I have been having issues with my Deco Xe75 dropping connections -- I have my office in the basement, the router is on the first floor with a satelite on the second floor and in the basement -- I do not have the option of not having to go through walls for the connection ... the system originally was working fine but has been having issues of late.  I am trying to figure out how I can increase the signal strength to the basement without trying to have to connect another router  

The syste says everthing looks good and did a network optimization and that came out good -- I have a Gig+ coming out of the pipe from Comcast but the signal is weak throughout the house (house is only 2200 sqft)