Time synchronization system, management device, time synchronization method, and program
US11927923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2019 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Jun 11, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A management apparatus in a time synchronization system includes a time variation information receiving unit configured to acquire time variation information and position information of a time synchronization apparatus, a position information classifying unit configured to classify time synchronization apparatuses into predetermined categories based on the acquired position information, a time variation analysis configured to determine majority based on whether patterns of time variation of the time synchronization apparatuses belonging to an identical category are identical to each other, and to analyze the time variation based on the determined results, and a filtering and delivery unit configured to output an instruction to block the time information received from the positioning satellite, to the time synchronization apparatus having abnormal time variation. A GPS-FW includes a filtering determination unit configured to blocks the time information received from a GPS satellite in a case where a block instruction is received from the management apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.