Title: Synchronization system and method for wireless communicating nodes

Abstract

A system includes first and second wireless nodes having a clock with plural times, a wireless transceiver, and a processor cooperating with the transceiver to transmit and receive packets. The second node transceivers wirelessly communicate with the first or other second node transceivers. The second nodes include a Kalman filter with an output, plural filter gains, and an input representing the difference between: about the time of the clock when a received packet should have ideally been received, and a time when the received packet was actually received as measured by the clock. A circuit provides dynamic adjustment of the filter gains. The Kalman filter output estimates the difference between the time of the receiving node clock and a corresponding one of the times of the transmitting node clock. The second processor cooperates with the Kalman filter output to adjust the times of the receiving node clock.

Inventors:

Armstrong, Brian S. R.; Pereira, Luis R.; Rentel, Carlos H.

Issue Date:

2011-03-22

Research Org.:

Eaton Corp., Cleveland, OH (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1531834

Patent Number(s):

7912164

Application Number:

11/613,406

Assignee:

Eaton Corporation (Cleveland, OH)

Patent Classifications (CPCs):

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04W - WIRELESS COMMUNICATION NETWORKS

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04J - MULTIPLEX COMMUNICATION

Show more

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04W - WIRELESS COMMUNICATION NETWORKS

H04W56/0075 - {based on arrival time vs. expected arrival time}

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04J - MULTIPLEX COMMUNICATION

H04J3/0658 - {Clock or time synchronisation among packet nodes}
H04J3/0679 - {by determining clock distribution path in a network}

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04W - WIRELESS COMMUNICATION NETWORKS

H04W56/002 - {Mutual synchronization}
H04W92/18 - between terminal devices

Show less

DOE Contract Number:  

FC26-04NT42071

Resource Type:

Patent

Resource Relation:

Patent File Date: 2006-12-20

Country of Publication:

United States

Language:

English