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:
Jul. 05, 2016

Filed:

Sep. 30, 2013
Applicant:

Honeywell International Inc., Morristown, NJ (US);

Inventors:

Santosh Mallikarjuna Mandiganal, Karnataka, IN;

Rachana Gurunandan Rao, Karnataka, IN;

Patrick S. Gonia, Maplewood, MN (US);

Vincent Clarence Jacobson, Eden Prairie, MN (US);

Assignee:

Honeywell International Inc., Morris Plains, NJ (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 56/00 (2009.01); H04W 52/02 (2009.01); H04W 4/22 (2009.01);
U.S. Cl.
CPC ...
H04W 56/0015 (2013.01); H04W 4/22 (2013.01); H04W 52/02 (2013.01); H04W 52/029 (2013.01);
Abstract

A method including running a local low frequency clock in a node in a network during a battery conserving sleep mode, waking from the sleep mode at a time boundary determined by the low frequency clock, updating a representation of a master time based on a calculation and the time boundary, advancing the representation of master time based on a local high frequency clock while the node is awake, receiving a time synchronization signal from a node in the network, updating the calculation based on a difference between the representation of master time and a time provided in the time synchronization signal, setting a new time boundary, and returning to the sleep mode.


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