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US 2022/0209882 A1Published application
Method and apparatus for switching clock sources
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsYao PENG, Jun WANG, Daiying LIU
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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.
Claims7
A method for switching clock sources, the method comprising:
- monitoring Precision Time Protocol (PTP) packets using PTP ports which connect to a new grandmaster;
- calculating a frequency and a phase for a first PTP port based on the PTP packets;
- and
- in response to a successful check for the frequency and the phase, adding the first PTP port to a candidate list.
1 more element
Dependencies are inferred from the claim text.