Why Users Are Associated with Other APs When AP Density Is High?
The reason is that the interval between sending Beacon frames is long. A STA obtains peripheral wireless network information in either of the following ways:
Passive scan: A STA listens on the Beacon frames sent by APs to obtain wireless network information.
Active scan: A STA actively sends a Probe Request frame and receives Probe Response frames to obtain wireless signals.
A STA can actively and passively scan wireless networks. When a STA passively scans wireless networks and the AP density is high, the STA can receive Beacon frames from another AP, not the nearest AP and perform association.