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1. (WO2018165137) REDUCED LATENCY OPERATING MODES FOR WIRELESS MESH NETWORKS

Pub. No.:    WO/2018/165137    International Application No.:    PCT/US2018/021116
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Wed Mar 07 00:59:59 CET 2018
IPC: H04B 7/212
H04J 3/06
H04W 72/04
H04W 84/18
Applicants: ITRON NETWORKED SOLUTIONS, INC.
Inventors: POORREZAEI, Kamal
Title: REDUCED LATENCY OPERATING MODES FOR WIRELESS MESH NETWORKS
Abstract:
A wireless mesh network includes a mesh of continuously-powered devices (CPDs) and a mesh of battery-powered devices (BPDs). The BPDs are organized into hop layers based on hopping distance to the mesh of CPDs. In a medium latency communication mode, a given BPD receives data during a receive window that is scheduled to occur within either the first half of a communication window or the second half of the communication window, depending on the parity of the hop layer where the BPD resides. With this approach, a data packet can traverse one hop of the BPD mesh per communication window. In a low-latency communication mode, a given BPD receives and transmits data according to an alternating pattern that depends on the parity of the hop layer where the node resides. With this technique, a data packet can traverse multiple hops of the BPD mesh within a single communication window. These techniques also are applicable to CPDs and other types of nodes as well.