US Patent No. 10,560,894

MESH ROUTING OF SLEEPY SENSOR DATA


Patent No. 10,560,894
Issue Date February 11, 2020
Title Mesh Routing Of Sleepy Sensor Data
Inventorship Joel C. VanderZee, La Crosse, WI (US)
Assignee Trane International Inc., Davidson, NC (US)

Claim of US Patent No. 10,560,894

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.