Another way to accomplish your goal is to deploy a second wireless AP closer to your distant clients, using the same service set identifier (SSID) as your existing AP. Both APs should be connected to the same backhaul network -- for example, plug both AP Ethernet ports into the same LAN hub or switch. If the location of your new AP makes Ethernet a challenge, consider using a wire-free alternative like HomePlug to connect your new AP to the same hub/switch as your existing AP. HomePlug adapters use the electrical wiring inside a home to carry Ethernet transmissions without requiring Cat5 cables. Simply insert your new AP's Ethernet output into a HomePlug adapter, plugged into a nearby electrical socket. Plug a second HomePlug adapter into an electrical socket near your existing AP, connected to that AP's hub/switch. Now you have two APs serving your Wi-Fi clients, connected to the same backhaul LAN, that together offer twice as much bandwidth and operate more efficiently than the wireless repeater solution described above. See this overview to learn more about HomePlug technology.
This was first published in January 2009