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System and method for adaptive sleep of wirelessly networked devices

  • US 8,619,652 B2
  • Filed: 11/28/2007
  • Issued: 12/31/2013
  • Est. Priority Date: 12/04/2006
  • Status: Expired due to Fees
First Claim
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1. A method of power saving in a wireless network for transmitting uncompressed audio/video (A/V) data, the method comprising:

  • detecting a low or no channel activity in the wireless network by a station;

    entering into a deep sleep power saving (DSPS) mode by the station, wherein the DSPS mode includes one or more periods of inactive state during which the station does not transmit a beacon, wherein the DSPS mode includes a first sub-mode and a second sub-mode, wherein the first sub-mode comprising a passive DSPS mode (PDSM) and the second sub-mode comprising an active DSPS mode (ADSM);

    adaptively computing a current sleep period for a current sleep window cycle based at least on a maximum allowed sleep period and one or more previous sleep periods by the station; and

    remaining in the deep sleep mode by the station for the duration of the computed current sleep period or until a new channel activity is detected in the wireless network, wherein the PDSM comprising;

    passively scanning for channel activity for K superframes during a scheduled wake period, wherein the station terminates the PDSM when channel activity is detected, otherwise the station returns to an inactive state, where K comprises an integer; and

    the ADSM comprising;

    announcing the ADSM to all stations in the wireless network by transmitting DSPS messages indicating DSPS status.

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