Patent · US Active

Method and apparatus for switching clock sources

US11811503B2 · kind B2 · utility

0Cited by

2References

7Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Yao Peng · Shanghai, CN
Jun Wang · Village of La Jolla, US
Daiying Liu · Beijing, CN

Key dates

Filing date	Apr 29, 2019
Grant date	Nov 7, 2023
Priority date	—
Expiry date	May 2, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04J3/0688
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

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 (401). A frequency and a phase for the PTP port are calculated based on the PTP packets (402). In response to a successful check for the frequency and the phase, the PTP port is added to a candidate list (403). A phase calibration and a phase stability check may be introduced prior to the alternate BMCA.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.