Roaming system using wireless access controller to select access point and method thereof

摘要

A roaming system using a wireless access controller to select an access point and the method thereof are provided. By sending a signal strength between a station and access points (AP's) detecting the station from each AP to a wireless access controller (WAC), and notifying the station to select one of the APs to connect according to the signal strength between the station and each AP by the WAC, the system and the method can keep connection quality and transmission efficiency of a station, and achieve the effect of fast roaming.

主权项

1. A roaming method using a wireless access controller (WAC) to select an access point (AP), comprising the steps of:
connecting a station (STA) to a first AP; transmitting first target station register message comprising a security key from the station to a WAC via the first AP, so that the security key is stored at the first AP and the WAC; after a second AP detects the station, transmitting target station query message to the WAC; sniffing communication packets between the station and the WAC by the second AP, so that the second AP obtains an MAC address of the station; transmitting a signal comprising a roam domain of the station corresponding to the MAC address by the WAC to the second AP; comparing the roam domain in the signal and the roam domain recorded in the MAC address by the second AP; transmitting a signal strength between the station and the second AP to the WAC by the second AP, if the roam domain in the signal and the roam domain recorded in the MAC address is determined as the same; transmitting monitor AP register message to the station via the first AP by the WAC; after the WAC determines whether the signal strength is compliant with predetermined roaming rules, transmitting a roaming command to the station; and the station roams to the second AP according to the roaming command.