Time control apparatus, time control method, and program
US9608855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2013 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Sep 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0685
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A time control apparatus provided in a slave machine and synchronizing time information with time information of a master machine connected over a network includes: calculation units respectively calculating time difference candidates of the slave machine with respect to the master machine and network delays indicative of an average of times necessary for communication of first and second messages over the network based on transmission and reception times of the first messages which are transmitted from the master machine and received using the slave machine and transmission and reception times of the second messages which are transmitted from the slave machine and received using the master machine; a selection unit selecting one of the calculated time difference candidates as a time difference based on the calculated network delays; and an adjustment unit adjusting the time information of the slave machine based on the selected time difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.