Fault tolerant time synchronization

G - Physics – 04 – G

Patent

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Details

G04G 7/00 (2006.01) H02J 4/00 (2006.01) H02J 13/00 (2006.01) H04L 7/00 (2006.01) H04L 7/04 (2006.01) H04L 12/413 (2006.01)

Patent

CA 2757376

Systems and methods for distributing accurate time information to geographically separated communications devices are disclosed. Additionally, the desired systems and methods may adjust local time signals to compensate for measured signal drifts relative to more accurate time signals. Moreover, a system may determine a best available time signal based on a weighted average of available time signals or select a best available time signal based on weighted characteristics of various time signals. A system may be further configured to transmit time information embedded in an overhead portion of a SONET frame, including transmission of a standard or common time.

L'invention concerne des systèmes et des procédés pour distribuer des informations temporelles précises à des dispositifs de communication séparés géographiquement. De plus, les systèmes et les procédés souhaités peuvent ajuster les signaux temporels locaux pour compenser des dérives de signaux mesurées par rapport à des signaux temporels plus précis. De plus, un système peut déterminer un meilleur signal temporel disponible sur la base d'une moyenne pondérée de signaux temporels disponibles ou sélectionner un meilleur signal temporel disponible sur la base des caractéristiques pondérées de divers signaux temporels. Un système peut en outre être configuré pour transmettre des informations temporelles intégrées dans une partie de surdébit d'une trame SONET, comprenant la transmission d'un temps standard ou commun.

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