A Rock Solid Way Of Extending Your Wifi Signal Around The House
So you would need a wifi access point. An access point is not a router but it is used for devices to access it hence the name. The access point gets its internet from the router and can then distribute it to devices attached to IT.
TP-Link have some great solid products. There are indoor and outdoor versions. You want to get some LAN cable and have it running from your router in your house to the device. It will need a power supply to it as well. The reason you would have a hard line to it rather then using a signal wifi extender is that you are likely to have a much more reliable system with the access point that has a cable to the router.