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:
Oct. 11, 2011
Filed:
Jul. 27, 2006
Daniel Christian Biederman, San Jose, CA (US);
Haichuan Tan, Santa Clara, CA (US);
Howard Borchew, Saratoga, CA (US);
Senthil Arumugam, San Jose, CA (US);
Daniel Christian Biederman, San Jose, CA (US);
Haichuan Tan, Santa Clara, CA (US);
Howard Borchew, Saratoga, CA (US);
Senthil Arumugam, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Disclosed, inter alia, is a Physical Layer Transceiver (PHY) with integrated time synchronization, such as, but not limited to, IEEE 1588 Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems. The PHY includes circuitry to maintain a current time, and to trigger the storage of timestamps corresponding to received frames. Typically, in response to a request from an external device, the timestamps are retrieved from storage and are communicated to the external device. By moving the triggering of the storage of the timestamps by the PHY itself, rather than by a monitoring of the traffic between the PHY and the Media Access Controller (MAC), higher accuracy can typically be achieved.