What's wireless roaming?

Roaming overview
Wireless roaming means that when a STA (Station, wireless workstation) moves to a critical area covered by two APs, the STA associates with the new AP and disconnects from the original AP, and maintains an uninterrupted network during this process. connect. Simply put, just like the mobile calling function of a mobile phone, the mobile phone can provide uninterrupted and seamless communication capabilities when moving from the coverage of one base station to the coverage of another base station.

b) Some basic concepts of roaming
1) Diffuse AC: or HA (Home-AC)
A wireless terminal (STA) associates with a wireless controller in the roaming group for the first time, and the wireless controller is the diffused AC of the wireless terminal (STA).

2) Diffuse into AC
Also called FA (Foreign-AC); it is connected to a wireless terminal (STA), and is not the wireless controller of the HA, the wireless controller is the inflow AC of the wireless terminal (STA).

3) Roaming within the AC
A wireless terminal (STA) roams from one AP of a wireless controller to another AP in the same wireless controller, which is called intra-AC roaming.

4) Roaming between ACs
A wireless terminal (STA) roams from an AP in a wireless controller to an AP in another wireless controller, which is called inter-AC roaming.