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Mesh routing of sleepy sensor data

  • US 10,560,894 B2
  • Filed: 01/13/2016
  • Issued: 02/11/2020
  • Est. Priority Date: 01/13/2015
  • Status: Active Grant
First Claim
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1. In a mesh network having an end node operable in a sleep mode and an awake mode, an energy-efficient method of transmitting data from the end node to a destination node, comprising:

  • transmitting a first message, the first message including a tag ID of the destination node and message data, from the end node to a parent node of the end node, wherein the tag ID represents an identifier of the destination node that differs from a network address of the destination node assigned by the mesh network;

    receiving, at the end node, a first acknowledgement from the parent node acknowledging receipt of the first message by the parent node;

    causing the end node to enter sleep mode in response to the first acknowledgement;

    in response to determining that the parent node is not the destination node;

    performing, at a node other than the end node, a discovery procedure that identifies the network address of the destination node based on the tag ID;

    performing, at the node, a routing procedure that transmits a second message, comprising the first message, to the destination node based on the network address and receives, at the parent node, a second acknowledgement acknowledging receipt of the first message by the destination node; and

    in response to an indication that the end node has awakened from the sleep mode, transmitting, by the parent node, the second acknowledgement to the end node.

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