Methods, devices, and systems for supporting wireless roaming

A method for supporting wireless roaming among coverage areas of a plurality of access points, comprising:

• detecting, by a first access point of the plurality of access points, signal strength of signals from a client device that is wirelessly connected to the first access point;
• comparing the signal strength with a threshold, and if the signal strength is less than the threshold, disconnecting, by the first access point, the client device from the first access point;
• transmitting, by the first access point, a signal indicating the disconnection of the client device to an access controller;
• updating, by the access controller, connection status information to indicate the disconnection of the client device from the first access point;
• transmitting, by the access controller, the connection status information of the client device to the plurality of access points;
• and
• in response to receiving the connection status information that indicates the disconnection of the client device from the first access point, connecting, by a second access point of the plurality of access points, the client device with the second access point of the plurality of access points;
• wherein detecting, by a first access point, signal strength of signals from a client device that is wirelessly connected to the first access point comprises:
• generating a received signal strength indicator (RSSI) to indicate signal strength of the signals from the first client device, and wherein the threshold level is a RSSI threshold level;
• and wherein:
• multiple access points of the plurality of access points have an overlapping coverage area;
• each of the multiple access points has a maximum RSSI and a minimum RSSI of signals from the client device when the client device is within the overlapping coverage area;
• and
• the RSSI threshold is a medium of the maximum RSSI and minimum RSSI of the multiple access points.