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Communication system for sensor networks

  • US 9,936,451 B2
  • Filed: 06/18/2015
  • Issued: 04/03/2018
  • Est. Priority Date: 06/18/2015
  • Status: Active Grant
First Claim
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1. A method for managing communications in a sensor network, the method comprising:

  • receiving charging interval data from an energy-harvesting sensor device for the energy-harvesting sensor device at a coordinator device;

    determining a sleeping interval of the energy-harvesting sensor device based on the charging interval data;

    transmitting a beacon frame from the coordinator device to the energy-harvesting sensor device, the beacon frame including sensor device data used by the energy-harvesting sensor device, wherein the timing of the transmission of the beacon frame is based on the sleeping interval;

    detecting, at the coordinator device, that the energy-harvesting sensor device has not received the beacon frame with the sensor device data;

    transmitting upon said detecting, from the coordinator device to the energy-harvesting sensor device, a beacon frame that does not include sensor device data;

    receiving, at the coordinator device, in response to the beacon frame without sensor device data, updated charging interval data from the energy-harvesting sensor device indicating that a charging interval has changed; and

    transmitting from the coordinator device to the energy-harvesting sensor device a second beacon frame that includes the sensor device data, wherein the timing of the transmission of the second beacon frame is based on the updated charging interval data.

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