i got a 3G+ HSPA Broadband service, its an internet receiver from my ISP at 21mb/s, its connected to my Airport Extreme Base Station that is placed on the 1st floor of my house, connected to the airport extreme are all the computers and gaming consoles on the first floor through LAN and Wireless 2.4ghz N, and an External 2TB storage HDD, now the problem is theres no internet coverage on the second floor, only in the room above the room that the AP extreme is in, what do i do? i want to wirelessly extend the network to cover the whole second floor without an ethernet wire, should i place another airport extreme upstairs? does act as a wireless bride? like take in wireless and transmit wireless?