Reduced power network association in a wireless sensor network
First Claim
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1. An apparatus, comprisinga sensor node for a wireless sensor network, the sensor node to:
- monitor, during a network sleep period for the wireless sensor network, for received wireless signals containing information pertaining to an operational mode for the wireless sensor network; and
enter, subsequent to said monitoring and prior to the wireless sensor network entering the operational mode, a sleep mode in which the sensor node cannot monitor for the received signals.
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Abstract
In some embodiments of the invention, an unassociated node in a low-duty-cycle wireless sensor network may determine when the next network operational period begins, so that the node may go into a power-saving sleep mode until the start of that operational period.
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Citations
24 Claims
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1. An apparatus, comprising
a sensor node for a wireless sensor network, the sensor node to: -
monitor, during a network sleep period for the wireless sensor network, for received wireless signals containing information pertaining to an operational mode for the wireless sensor network; and enter, subsequent to said monitoring and prior to the wireless sensor network entering the operational mode, a sleep mode in which the sensor node cannot monitor for the received signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus, comprising
a controller node for a wireless sensor network, the controller node to: -
transmit to sensor nodes in the wireless sensor network, during a first network operational period, at least one indicator of a time period for a network sleep mode to occur subsequent to the network operational period; and transmit, during the time period for the network sleep mode, at least one message containing an indicator of a remaining time period until a second network operational period. - View Dependent Claims (8, 9)
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10. A method, comprising:
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placing a wireless sensor node into a first operational mode for a first period of time, the operational mode being a mode in which the node is able to process incoming radio signals; placing the wireless sensor node in a low power mode for a second period of time subsequent to the first period of time, the low power mode being a mode in which the node is unable to process the incoming radio signals; and placing the wireless sensor node into a second operational mode for a third period of time subsequent to the second period of time; wherein the first and second periods of time occur during a network sleep period and the third period of time occurs during a network operational period. - View Dependent Claims (11, 12, 13, 14)
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15. A method comprising:
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transmitting at least one wireless message to multiple wireless sensor nodes in a network, directing the wireless sensor nodes to enter a low power sleep mode until the end of a predetermined time period; and transmitting additional messages during the predetermined time period, the additional messages containing an updated indication of when the predetermined time period is to end. - View Dependent Claims (16)
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17. An article comprising
a tangible machine-readable medium that contains instructions, which when executed by one or more processors result in performing operations comprising: -
placing a wireless sensor node into a first operational mode for a first period of time, the operational mode being a mode in which the node is able to process incoming radio signals; placing the wireless sensor node in a low power mode for a second period of time subsequent to the first period of time, the low power mode being a mode in which the node is unable to process the incoming radio signals; and placing the wireless sensor node into a second operational mode for a third period of time subsequent to the second period of time; wherein the first and second periods of time occur during a network sleep period and the third period of time occurs during a network operational period. - View Dependent Claims (18, 19, 20, 21, 22)
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23. An article comprising
a tangible machine-readable medium that contains instructions, which when executed by one or more processors result in performing operations comprising: -
transmitting at least one wireless message to multiple wireless sensor nodes in a network, directing the wireless sensor nodes to enter a low power mode for a predetermined time period; and transmitting additional messages during the predetermined time period, the additional messages containing an indication of when the predetermined time period is to end. - View Dependent Claims (24)
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Specification