How to name your Wi-Fi networks for best Mac, iPhone, and iPad roaming
Give your devices the great freedom to roam among Wi-Fi gateways—with one notable exception.
body>
Macs, iPhones, iPads, and other Apple hardware roam best across Wi-Fi networks that are made up of multiple wireless routers when the routers all share the same network name, known obscurely as a Service Set Identifier (SSID). This name allows your devices to recognize the collective set of routers as all equally available to switch among to preserve a connection when the signal for one network becomes weak.
I have several access points, but they're all unified under a single name.