Method and system employing wideband signals for RF wakeup
First Claim
1. A method of reducing an energy consumption of a wireless network, the method comprising:
- periodically entering a sleep mode by a receiver node;
broadcasting a signal simultaneously across an entirety of a wide band frequency range; and
upon waking up from the sleep mode, listening by the receiver node to only a first narrow part of the wide band frequency range, the receiver node subsequently performing one of the following;
returning to sleep if a signal strength of the broadcasted signal is less than a predefined signal strength threshold; and
staying awake for an additional period of time if the signal strength of the broadcasted signal is greater than the predefined signal strength threshold.
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Abstract
A method of reducing an energy consumption of a wireless network, the method including periodically entering a sleep mode by a receiver node, broadcasting a signal simultaneously across a wide band frequency range, upon waking up from the sleep mode, listening by the receiver node to only a first narrow part of the wide band frequency range, the receiver node subsequently either returning to sleep if a signal strength of the broadcasted signal is less than a predefined signal strength threshold, or staying awake for an additional period of time if the signal strength of the broadcasted signal is greater than the predefined signal strength threshold.
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Citations
17 Claims
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1. A method of reducing an energy consumption of a wireless network, the method comprising:
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periodically entering a sleep mode by a receiver node; broadcasting a signal simultaneously across an entirety of a wide band frequency range; and upon waking up from the sleep mode, listening by the receiver node to only a first narrow part of the wide band frequency range, the receiver node subsequently performing one of the following; returning to sleep if a signal strength of the broadcasted signal is less than a predefined signal strength threshold; and staying awake for an additional period of time if the signal strength of the broadcasted signal is greater than the predefined signal strength threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless network comprising:
a plurality of nodes, wherein; at least one of the plurality of nodes is configured to broadcast a wideband signal simultaneously across an entirety of a predefined frequency range; and at least one of the plurality of nodes is configured to; select one of a plurality of narrow parts of the predefined frequency range in which to selectively receive transmission of the wideband signal; periodically enter a sleep mode; and upon waking up from the sleep mode; listen to only a narrow part of the predefined frequency range; and subsequently return to sleep if a signal strength of the broadcasted signal is less than a predefined signal strength threshold, and stay awake for an additional period of time if the signal strength of the broadcasted signal is greater than the predefined signal strength threshold. - View Dependent Claims (12, 13, 14)
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15. A wireless sensor node, comprising:
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an arrangement to power the wireless sensor node; an arrangement to at least one of;
(a) sense an environmental condition and (b) actuate upon a stimulus;an arrangement to receive a wireless transmission; and a microcontroller to control an operation of the wireless sensor node, wherein the wireless sensor node is configured to periodically enter a sleep mode, and upon waking up from the sleep mode, listen to only a first narrow part of a signal broadcasted simultaneously across an entirety of a wide band frequency range, the wireless sensor node further configured to return to sleep if a signal strength of the broadcasted signal is less than a predefined signal strength threshold, and stay awake for an additional period of time if the signal strength of the broadcasted signal is greater than the predefined signal strength threshold. - View Dependent Claims (16, 17)
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Specification