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Method of scanning for beacon transmissions in WLAN

  • US 20060089138A1
  • Filed: 10/26/2004
  • Published: 04/27/2006
  • Est. Priority Date: 10/26/2004
  • Status: Active Grant
First Claim
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1. A method of scanning for beacon transmissions from a wireless local area network (WLAN) access point by a wireless station, comprising:

  • performing a scan and shut down procedure, including;

    waking up a WLAN radio subsystem of the wireless station at a target beacon time;

    receiving a beacon on a presently associated channel, the beacon transmission including beacon data including a received access point identifier;

    passing the beacon data to a host processor of the wireless station;

    placing the WLAN radio subsystem into a low power state immediately after receiving and passing;

    comparing the received access point identifier with a presently associated access point identifier, performed by the host processor;

    if the received access point identifier is the same as the presently associated access point identifier continuing to the scan and shut down procedure for receiving a next beacon transmission; and

    if the received access point identifier is not the same as the presently associated access point identifier, discarding the beacon data and using a timed window scanning procedure for receiving the next beacon transmission.

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