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:
Nov. 07, 2023
Filed:
Apr. 29, 2019
Applicant:
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Inventors:
Assignee:
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Primary Examiner:
Int. Cl.
CPC ...
H04J 3/06 (2006.01);
U.S. Cl.
CPC ...
H04J 3/0667 (2013.01); H04J 3/0617 (2013.01); H04J 3/0629 (2013.01); H04J 3/0688 (2013.01);
Abstract
A method for switching clock sources is provided. In the method, Precision Time Protocol, PTP, packets are monitored using each of PTP ports which connect to a new grandmaster (). A frequency and a phase for the PTP port are calculated based on the PTP packets (). In response to a successful check for the frequency and the phase, the PTP port is added to a candidate list (). A phase calibration and a phase stability check may be introduced prior to the alternate BMCA.