I'm setting up a home network utilizing a Comcast cable modem. It is located on the first floor of the house. I have a wired network in the basement with 3 computers that need to be connected. There is only one wire from the first floor that goes between the floors. My current configuration is that I have the cable modem on the first floor and the WAN wire feeds a wireless router in the basement, which all of the computers connect to. The challenge is that the wireless signal dies as I get to the second floor. I'm a novice at this. What configuration and equipment would you suggest I use? The home is approximately 2800 sqft between the three floors.