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.
Patent No.:
Date of Patent:
Jan. 19, 2010
Filed:
Apr. 27, 2005
Sivaram Balasubramanian, Solon, OH (US);
Anatoly Moldovansky, Pepper Pike, OH (US);
Kendal R. Harris, Mentor, OH (US);
Sivaram Balasubramanian, Solon, OH (US);
Anatoly Moldovansky, Pepper Pike, OH (US);
Kendal R. Harris, Mentor, OH (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
A method and circuit for precisely synchronizing clocks in separate nodes on a communication network is provided by adjusting timestamps and related data in network messages. The circuit will allow a daisy-chain connection of the nodes and will forward time synchronization frames while accounting for delays in a manner that does not use boundary clocks, but does not depart from the IEEE 1588 standard protocol. The delays will be added on the fly to synchronization packets and the IP checksum and frame CRC will be adjusted. Deterministic data delivery and redundant data paths are also provided in a full duplex Ethernet network.