Nanosecond accuracy under precision time protocol for ethernet by using high accuracy timestamp assist device
US10104148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2017 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Apr 26, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/6454
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In methods, systems, and devices, master and slave node timestamp synchronization units identify a node start frame delimiter of a time protocol message on transmission medium by matching patterns in the time protocol message to known start frame delimiter patterns. Master and slave node processors of such timestamp synchronization units capture a corresponding node clock time at which the node start frame delimiter is identified by referring to a corresponding node clock signal while each is identifying the node start frame delimiter. The master and slave node processors perform compensation of the node clock time by making adjustments to the node clock time for known time latency. The master and slave node timestamp synchronization units then output the node clock time as timestamps to corresponding timestamp units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.