WiFi · Networking
Wi-Fi Roaming
The process by which a wireless device transitions from one access point to another as it moves through a space, ideally without dropping connections or interrupting ongoing sessions.
In a multi-AP environment, a device doesn't stay connected to one AP forever — as it moves, signal quality to the current AP degrades and a nearer AP becomes the better choice. Roaming is the handoff process.
Sticky client problem
The roaming decision is made by the client, not the AP. Some clients are "sticky" — they hold onto a weak signal from a distant AP rather than roaming to a closer one, even when the closer AP would give them much better performance. This is a common cause of poor Wi-Fi experience in larger spaces.
Modern access points and controllers combat this by nudging clients toward the better AP and helping them find nearby options without a slow scan.
Fast handoff for calls
Standard roaming makes the device fully re-authenticate with each new AP — a delay long enough to drop a VoIP call mid-sentence. Fast-handoff features pre-stage that authentication so the switch between APs takes milliseconds, which is essential for voice and video on the move. Most enterprise Wi-Fi systems support this; it usually just needs to be enabled.
SSID consistency
For seamless roaming, all APs serving the same wireless network must broadcast the same SSID with the same security settings. Clients roam between APs transparently because from their perspective it's all the same network.