Patent · US Active

Network timing synchronization

US11463253B2 · kind B2 · utility

3Cited by

6References

20Claims

0Family size

Inventors

Birju N. Shah · Piscataway, US
Tristan F. Schaap · San Francisco, US
James E. Zmuda · Redwood City, US
Manfred von Willich · Carp, CA

Key dates

Filing date	Sep 8, 2017
Grant date	Oct 4, 2022
Priority date	—
Expiry date	Sep 28, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/12
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Techniques are disclosed relating to time synchronization in a network. In some embodiments, an apparatus includes a first circuit having a first clock configured to maintain a local time value for a node coupled to a network. The first circuit is configured to send a first message to a second circuit. The first message includes a first nonce. The second circuit has a second clock that maintains a reference time value for the network. The first circuit receives a second message from the second circuit, the second message including a second nonce and is associated with a timestamp identifying the reference time value. The first circuit compares the first nonce to the second nonce to determine whether the timestamp is valid and, in response to determining that the timestamp is valid, uses the timestamp to synchronize the first clock with the second clock.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.