公开(公告)号：US20230046129A1

公开(公告)日：2023-02-16

申请号：US17402211

申请日：2021-08-13

Applicant: ITRON, INC.

Inventor： Thomas F. UHLING ,  Keith Wayne BARNES

IPC: H04L12/26 ,  H04W24/08

Abstract: One embodiment of the present invention sets forth a technique for evaluating connections between nodes in a mesh network. The technique includes listening, at a first node and across a plurality of listening windows, for one or more messages transmitted by a second node during a first period of time; determining a number of messages received by the first node during the first period of time; computing, based on the number of messages received by the first node, a received message success rate associated with a first connection between the first node and the second node, wherein the received message success rate indicates a probability of successfully receiving, at the first node, messages transmitted by the second node via the first connection; and computing, based on at least one message received during the first period of time, a transmitted message success rate associated with the first connection, wherein the transmitted message success rate indicates a probability of successfully transmitting messages from the first node to the second node via the first connection.

公开(公告)号：US20220394611A1

公开(公告)日：2022-12-08

申请号：US17888448

申请日：2022-08-15

Applicant: ITRON, INC.

Inventor： Christopher Lloyd OSTERLOH ,  Keith Wayne BARNES ,  Thomas UHLING

IPC: H04W52/02 ,  H04W40/10

Abstract: Techniques for path selection in a network include a first node in a mesh network receiving, from a second node in the mesh network, a first battery life metric for a path through the mesh network, determining a value representing a remaining battery life of the first node, calculating a second battery life metric based on at least one of the first battery life metric for the path or the value representing the remaining battery life for the first node, and transmitting, to a third node in the mesh network, the second battery life metric.

公开(公告)号：US20220376807A1

公开(公告)日：2022-11-24

申请号：US17325892

申请日：2021-05-20

Applicant: ITRON, INC.

Inventor： Thomas F. UHLING ,  Keith Wayne BARNES ,  Howard Neal BRACE ,  Imad JAMIL

IPC: H04J3/06 ,  H04L12/26

Abstract: One embodiment of the present invention sets forth a technique for performing time synchronization within a network. The technique includes receiving, from a first node in the network and at a first receive time, a first periodic beacon that includes a first network time associated with the first node. The technique also includes determining a second receive time at which a second periodic beacon from the first node is to be received based on the first network time and the first receive time. The technique further includes calculating a first listening window for the second periodic beacon based on the second receive time, a first jitter uncertainty, and a first drift uncertainty, and listening for the second periodic beacon during the first listening window.

公开(公告)号：US20220022131A1

公开(公告)日：2022-01-20

申请号：US16930228

申请日：2020-07-15

Applicant: ITRON, INC.

Inventor： Christopher Lloyd OSTERLOH ,  Keith Wayne BARNES ,  Thomas UHLING

IPC: H04W52/02 ,  H04W40/10

Abstract: A wireless network includes nodes configured to implement an improved parent and path selection process to efficiently and reliably manage energy consumption of a battery powered device node. When a given node selects a path, the node transmits requests to multiple potential parent nodes. Each potential parent node transmits a metric that is indicative of the remaining battery life of the nodes in the path that includes the respective potential parent node. The given node then selects a parent node, and corresponding path, based on the metrics. More specifically, the given node selects a path, where at least one node on the selected path is less likely to prematurely exhaust the remaining battery life of the node, relative to the nodes in the other potential paths. As a result, the given node selects a path that optimizes battery consumption of the various battery powered nodes in the wireless network.

公开(公告)号：US20200008146A1

公开(公告)日：2020-01-02

申请号：US16024574

申请日：2018-06-29

Applicant: ITRON, INC.

Inventor： Thomas UHLING ,  Imad JAMIL ,  Fabrice MONIER ,  Keith Wayne BARNES

IPC: H04W52/02 ,  H04W72/12

Abstract: A wireless mesh network includes a child node coupled to a parent node. The parent node transmits time sync beacons that indicate a time slot number and a start time for a current time slot. The child node receives the time sync beacons and determines a delta between the current time slot number of the child node and the current time slot number of the parent node. The child node also computes an offset between a start time of the current slot of the child node and the start time of the current slot of the parent node. The child node reports the delta and the offset to the parent node. Based on the delta and the offset, the parent node determines when, and on what channel, the child node is predicted to be receiving transmissions, and then schedules transmissions to the child node accordingly.