Synchronizing a central timing unit to an external link via...

H - Electricity – 04 – L

Patent

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Details

H04L 7/033 (2006.01) H04J 3/06 (2006.01) H04L 12/24 (2006.01)

Patent

CA 2243451

Synchronizing local timing units to a central timing unit to determine the difference in timing between external links and the local timing units so as to synchronize the centralized timing unit to the external links. This difference in timing is then transmitted to the central timing unit, which utilizes this information to adjust the timing of the central timingunit. The adjustment to the central timing unit brings it into synchronization with the selected external link. The local timing units are synchronized to the central timing unit via multiple timing paths set up through switching units within the network. Each switching unit switches one bit of data for each group of data being received on each of the external links. In addition, information received by each of the external links designating the accuracy of the external link is transmitted to the central timing unit so that the central timing unit can select the external link having the highest accuracy.

Synchronisation de temporisateurs locaux avec un temporisateur central afin de déterminer la différence de temporisation entre des liaisons externes et les temporisateurs locaux et de synchroniser ainsi le temporisateur centralisé avec les liaisons externes. Cette différence de temporisation est ensuite transmise au temporisateur central, qui l'utilise pour régler la temporisation du temporisateur central. Ce réglage synchronise le temporisateur central avec la liaison externe choisie. Les temporisateurs locaux sont synchronisés avec le temporisateur central au moyen de multiples trajets passant par les commutateurs à l'intérieur du réseau. Chaque commutateur commute un bit d'information pour chaque groupe de données reçues sur chacune des liaisons externes. En outre, l'information reçue par chacune des liaisons externes désignant la précision de la liaison externe est transmise au temporisateur central de sorte que ce dernier puisse sélectionner la liaison externe la plus précise.

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