Clock synchronization over redundant networks
US10348429B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2014 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Oct 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/001
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of facilitating clock synchronization over redundant networks may include, when a SYNC message and a DELAY_REQ message of a PTP clock synchronization cycle are carried by different redundant networks, adjusting a timestamp associated with one of the messages to emulate carriage of the SYNC message and the DELAY_REQ message by the same redundant network. In a method of facilitating PTP clock synchronization, an indicator of an operational status of each of a pair of redundant networks for carrying messages from a slave clock to a master clock may be embedded in a PTP message destined for the slave clock. An indicator of which one of the pair of redundant networks is valid for PTP clock synchronization may be obtained from a PTP message destined for the master clock. PTP messages to the master clock may be selectively relayed based on whether the PTP messages have been received from the valid one of the redundant networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.