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Power saving method for mobile terminal in wireless local area network

  • US 8,619,704 B2
  • Filed: 11/03/2006
  • Issued: 12/31/2013
  • Est. Priority Date: 11/04/2005
  • Status: Active Grant
First Claim
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1. A power saving method for a wireless local area network comprising a plurality of access points providing at least one mobile station in each access point cell with an access service, a mobile station transiting between an active mode and an idle mode, the method comprising the steps of:

  • grouping the plurality of access points into at least one paging group with a paging group boundary;

    determining if the mobile station is in the idle mode in which the mobile station switches between an awake state and a doze state every predetermined time interval, or in the active mode in which the mobile station is in the awake state;

    if the mobile station is in the idle mode, activating an idle handoff, which occurs only when the mobile station moves across the paging group boundary, the idle handoff being performed in a media access control level; and

    performing handoff operations related to an activation of an internet protocol layer after a successful completion of paging,wherein the idle handoff comprises a home access point of the mobile station transmitting, to a most recently associated access point of the mobile station, a page-notify message that initiates an access point receiving the page-notify message to page the mobile station, and the most recently associated access point transmitting the page-notify message to at least one access point in a paging group of the most recently associated access point.

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