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:
Aug. 19, 2014
Filed:
Dec. 17, 2009
Stewart Frederick Bryant, Surrey, GB;
Kenneth A. Patton, Cary, NC (US);
Mark L. Hendrickson, Lafayette, CO (US);
Rajiv Asati, Morrisville, NC (US);
Christian Cassar, Hampton, GB;
Stewart Frederick Bryant, Surrey, GB;
Kenneth A. Patton, Cary, NC (US);
Mark L. Hendrickson, Lafayette, CO (US);
Rajiv Asati, Morrisville, NC (US);
Christian Cassar, Hampton, GB;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In one embodiment, a clock on a network device is initialized, and then a first timing message is received at the network device from a reference device having a first timestamp indicating when the first timing message was transmitted from the reference device. The network device may then determine and store a one-way delay from the first timestamp to a first time at which the first timing message was received at the network device. In response to restarting the clock, the network device may receive a second timing message from the reference device having a second timestamp indicating when the second timing message was transmitted from the reference device. The network device may then calibrate the clock such that a second time at which the network device received the second timing message is the second timestamp plus the stored one-way delay.