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:
May. 03, 2011
Filed:
Jun. 25, 2007
Paxton Ming Kai Chow, Walnut Creek, CA (US);
Vera Alexandrova Snowball, Newark, CA (US);
Barton George Lane, Iii, Pleasanton, CA (US);
Sophia Leonidovna Shtilman, Sunnyvale, CA (US);
Chalee Asavathiratham, New York, NY (US);
Abhijit Majumdar, Pleasanton, CA (US);
Sherk Chung, San Francisco, CA (US);
Yi Wang, Foster City, CA (US);
Paul Tran, Sacramento, CA (US);
Paxton Ming Kai Chow, Walnut Creek, CA (US);
Vera Alexandrova Snowball, Newark, CA (US);
Barton George Lane, III, Pleasanton, CA (US);
Sophia Leonidovna Shtilman, Sunnyvale, CA (US);
Chalee Asavathiratham, New York, NY (US);
Abhijit Majumdar, Pleasanton, CA (US);
Sherk Chung, San Francisco, CA (US);
Yi Wang, Foster City, CA (US);
Paul Tran, Sacramento, CA (US);
Pivotal Systems Corporation, Pleasanton, CA (US);
Abstract
Embodiments of the present invention relate to managing timestamps associated with received data. According to one embodiment, data is collected from a device that generates data at a specified rate, but which lacks a built-in clock. An accurate timestamp is assigned to the data by first taking an absolute timestamp from a reference clock, and then adding a calculated amount of time to each subsequent data point based on an estimate of the sampling frequency of the device. As the generated timestamp drifts from the actual reference clock time, the sampling frequency is re-estimated based on the amount of detected drift.