System and method for adaptive sleep of wirelessly networked devices
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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Abstract
A system and method for power saving in a wireless network for transmitting uncompressed audio/video (A/V) data disclosed. The method includes an adaptive sleep period scheme in which the current sleep period is computed based at least partly on one or more previous sleep periods. The method also includes entering an inactive state by a coordinator as well as non-coordinator stations in the wireless network in which no beacons are transmitted.
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Citations
33 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of power saving in a wireless network for transmitting uncompressed audio/video (A/V) data having a coordinator station, the method comprising:
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detecting a low or no channel activity in the wireless network by the coordinator station; 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; entering into a deep sleep power saving (DSPS) mode status for the new sleep window, wherein the DSPS mode includes a power-saving inactive state during which the coordinator 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), 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. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus for power saving in a wireless network for transmitting uncompressed audio/video (A/V) data, the apparatus comprising:
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a processor configured for; causing the station to enter into a deep sleep power savings (DSPS) mode when a low or no channel activity is detected within a preset duration, 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), and adaptively computing a current sleep period for a current sleep window cycle using an adaptive sleep period algorithm based at least on a maximum allowed sleep period and one or more previous sleep periods; and a memory in communication with the processor and configured for storing the computed current sleep period, 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. - View Dependent Claims (26, 27, 28)
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29. An apparatus for power saving in a wireless network for transmitting uncompressed audio/video (A/V) data, the apparatus comprising:
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a processor configured for; 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 at least one of the stations, and causing a coordinator station to enter into a deep sleep power savings (DSPS) mode status for the duration of the current sleep period when a low or no channel activity is detected, wherein the DSPS mode includes a power-saving inactive state during which the coordinator 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); and a memory in data communication with the processor and configured to store the current sleep period, 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. - View Dependent Claims (30, 31, 32, 33)
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Specification