The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Sep. 09, 2025

Filed:

Apr. 13, 2023
Applicant:

Zainar, Inc., Redwood City, CA (US);

Inventors:

Philip A. Kratz, Redwood City, CA (US);

Mainak M. Chowdhury, Redwood City, CA (US);

Jonathan Lu, Redwood City, CA (US);

Siamak Yousefi, Redwood City, CA (US);

Assignee:

ZaiNar, Inc., Redwood City, CA (US);

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/08 (2006.01); G01S 5/02 (2010.01); G01S 11/08 (2006.01); H04L 7/00 (2006.01); H04L 7/04 (2006.01); H04W 64/00 (2009.01);
U.S. Cl.
CPC ...
H04L 7/08 (2013.01); G01S 5/02216 (2020.05); G01S 11/08 (2013.01); H04L 7/0016 (2013.01); H04L 7/041 (2013.01); H04W 64/003 (2013.01);
Abstract

A method includes: scheduling transmission of a first synchronization signal by a first node; and scheduling transmission of a second synchronization signal by a second node. The method also includes, after transmission of the first synchronization signal: receiving, from the first node, a first phase reference associated with the first synchronization signal; and receiving, from the second node, a first phase-of-arrival of the first synchronization signal at the second node. The method additionally includes, after transmission of the second synchronization signal: receiving, from the second node, a second phase reference associated with the second synchronization signal; and receiving, from the first node, a second phase-of-arrival of the second synchronization signal at the first node. The method further includes calculating a propagation delay between the first node and the second node based on the first phase reference, the second phase reference, the first phase-of-arrival, and the second phase-of-arrival.


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