A roaming algorithm for associating a mobile station (STA) with an access point in a wireless LAN system used in an automatic guidance vehicle (AGV) application. Fast roaming is achieved by eliminating a STA's scanning time during the search of the next AP to associate with. To eliminate the scanning time, each AP is pre-configured with its adjacent APs in advance. Whenever an AP is associated with, a mobile station (STA) gets the information of neighboring APs from the currently associated AP. Then, the STA continuously monitors the signal strength of APs in its neighborhood. During roaming, the STA chooses the best AP to associate with without having to scan all the APs.
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