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Fast handover method optimized for IEEE 802.11 networks

  • US 7,676,226 B2
  • Filed: 05/17/2005
  • Issued: 03/09/2010
  • Est. Priority Date: 05/17/2004
  • Status: Active Grant
First Claim
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1. A fast handover method for a mobile terminal in a wireless local area system including the mobile terminal and a plurality of wireless access points (APs), of which one is a serving AP currently communicating with the mobile terminal and others represent neighbor APs of the mobile terminal, that communicate with the mobile terminal over a unique radio channel, the method comprising:

  • receiving a beacon frame signal from the serving AP and the neighbor APs of the mobile terminal;

    generating a first signal to determine a state of each of the neighbor APs based on the beacon frame signal received from each of the neighbor APs;

    comparing the first signal with predefined thresholds, classifying the neighbor APs into a detected AP, a candidate AP, and a target AP according to a result of the comparison, and storing the classification result in a neighbor AP list; and

    selecting an AP for the handover based on the classification result in the neighbor AP list.

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