I did not quite understand your issue but if it is a distance problem, you can always use a learning bridge to extend your range and connectivity.
This device will do it for you perfectly. I have 3 of these at home and ALL my connections are wired to the back of my home router and I have absolutely no connectivity or interference issues.
https://www.amazon.com/NETGEAR-Ethernet-Unmanaged-Internet-Splitter/dp/B00QR6XFHQ/ref=sxts_sxwds-bia...