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Power-save method for 802.11 multicast paging applications

  • US 7,424,007 B2
  • Filed: 05/12/2004
  • Issued: 09/09/2008
  • Est. Priority Date: 05/12/2004
  • Status: Active Grant
First Claim
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1. A power-save method for a network having at least one access point and at least one associated power-save client comprising the steps of:

  • buffering, at the access point, wireless data including at least one of a unicast frame and a multicast frame;

    transmitting a periodic scheduled beacon message over at least one wireless link, the beacon message including a unicast indication element and a multicast indication element;

    designating at least one beacon message as a multicast delivery beacon;

    transmitting the buffered multicast frame following the designated at least one multicast delivery beacon;

    determining multicast group membership for each associated client station;

    examining at least one Internet Group Management Protocol Membership Report;

    determining, from the at least one Internet Group Management Protocol Membership Report a multicast group membership for the associated client; and

    classifying each multicast group;

    wherein a multicast group is disabled when no associated clients are members,wherein a multicast group is active when all member stations are in active mode, andwherein a multicast group is power-save when at least one associated member station is in power-save mode.

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