GPS-based time stamp system
US10310091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2015 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | May 18, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K3/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for providing time stamps protected from GPS timing signal attacks. A GPS receiver receives a GPS time data, and a local clock provides local time data. A controller initiates the local clock with the GPS time data. It continuously monitors the GPS time data by calculating any difference error between current GPS time data and local time data, and determining whether the error exceeds a threshold value. If the error does not exceed the threshold value, the GPS time data is used to discipline the local clock data and the disciplined output is used for the time stamp. If the error exceeds the threshold value, the local time data is used for the time stamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.