| 摘要 |
The present invention provides a wireless local area network handover method based on fuzzy rules, the method comprises: the mobile station S1: receives the beacon frames sent in predefined time interval from the current associated access point and the adjacent access point during a preset time period, obtains and stores signal strength of two access points through beacon frames; S2: performs fuzzy processing to the value of signal strength of the current access point and the adjacent access point and the change rate of signal strength respectively, then obtains fuzzy data characterizing levels of signal strength and the change rate of signal strength; S3: performs fuzzy reasoning taking the fuzzy data as the input according to a preset fuzzy rules, obtains a reasoning output variables which contain handover modes of the mobile station, and determine the target access point according to the reasoning outputs; S4: the mobile station authenticates with the target access point; S5: the mobile station sends the re-association request frame to the target access point after passing through the authentication; the handover is completed when the establishment of the re-association is finished after the mobile station receives the re-association response frame. According to the method of the present invention, the mobile station can automatically adjust the handover mechanism according to signal strength of the current access point and the adjacent point and change rate of signal strength and the better handover performance can therefore be achieved.
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