US 11,722,168 B2
Electrical phase computation using RF media
Philippe Chiummiento, Fontenay-aux-Roses (FR); Matthieu Pichot, Paris (FR); Guillaume Descamps, Paris (FR); and Fabrice Monier, Bry sur Marne (FR)
Assigned to Itron, Inc., Liberty Lake, WA (US)
Filed by Itron, Inc., Liberty Lake, WA (US)
Filed on Aug. 3, 2022, as Appl. No. 17/817,283.
Application 17/817,283 is a continuation of application No. 16/425,626, filed on May 29, 2019, granted, now 11,411,598.
Prior Publication US 2022/0376737 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04J 3/06 (2006.01); H04W 4/38 (2018.01); H04B 3/54 (2006.01); H04B 1/7073 (2011.01); H04W 72/0446 (2023.01); H04L 7/033 (2006.01); H04Q 9/00 (2006.01); H04L 7/00 (2006.01)
CPC H04B 1/7073 (2013.01) [H04L 7/0087 (2013.01); H04L 7/0331 (2013.01); H04Q 9/00 (2013.01); H04W 4/38 (2018.02); H04W 72/0446 (2013.01); H04B 2201/709718 (2013.01); H04Q 2209/60 (2013.01)] 20 Claims
OG exemplary drawing
 
10. A network, comprising:
a first metrology unit of a first network node to obtain first data indicating a first zero-crossing at a first time;
a second metrology unit of a second network node to obtain a packet comprising second data indicating a second zero-crossing at a second time; and
a processor of the first network node to:
obtain the packet comprising the second data, the packet comprising at least one free-run timer value defining a period between the second zero-crossing until a time of transmission of the packet;
record, at the first network node, a time of reception of the packet, the time of reception being based at least in part on a reception of the packet;
determine a time difference between the first zero-crossing and the second zero-crossing, wherein the time difference is based at least in part on the first data, the second data, the time of reception of the packet, and a latency defined by a time taken for the packet to propagate through at least one layer of at least one of the first metering device and the second metering device; and
determining, by operation of the processor of the first metering device, a phase difference between the first zero-crossing and the second zero-crossing based at least in part on the determined time difference.