I have an ordinary ADSL router, which also acts as WiFi AP. This router is connected to an Ethernet network, which includes several devices in several rooms. The WiFi signal can not reach all these rooms and I would like to avoid a simple WiFi range extender.
I am looking for a device which can be connected through Ethernet, far from the router, which can emulate the same WiFi network of the router. It should basically act as an additional antenna. This device should make a WiFi connection available in its area, using its Ethernet connection to the router for the actual data flow.
Does it exist? How is it called?