Method, device, and system for acquiring application information in WLAN

摘要

A method, a device, and a system for acquiring application information in a WLAN are provided by embodiments of the present invention, relating to the communication field, and used for acquiring application information of any mobile terminal in the WLAN. The method includes: sending, by a controller, a switch request message to an unassociated neighboring AP, where the switch request message includes an identifier of a mobile terminal and a designated channel, so that the unassociated neighboring AP switches from an original working channel of the unassociated neighboring AP to the designated channel and monitors the mobile terminal according to the identifier of the mobile terminal so as to acquire application information. The embodiments of the present invention are used for acquiring application information in a WLAN.