Im living in a student house which covers 3 floors. The walls are pretty thick, which I think is having a pretty big effect on the wireless signal strength. The router is on the ground floor and some people on the 2nd floor cant get the internet most of the time, even some people on the ground floor cant. What would be the best way to sort this out? Weve got a second router, could we connect that to the 1st one and use it on the second floor? Or would a booster be better?