Use a linksys router as a repeater
If the main router on the network is set to use 192.168.1.1, the router that will be used as a repeater should use a higher number, such as 192.168.1.2 or 192.168.1.10, depending on how many devices are on the network. Disable the router's DHCP server. This setting should be on the same page as the IP address, but each router is a little different.