Time synchronization using dynamic thresholds

H - Electricity – 04 – J

Patent

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H04J 3/06 (2006.01)

Patent

CA 2468764

Methods and apparatus for time synchronization using dynamic thresholds. A method for synchronizing network elements includes receiving at a network element a time synchronization message (102) sent from a master clock element. The network element includes an internal clock to be synchronized with a master clock of the master clock element. The method includes calculating a latency (104) of the time synchronization message. The method includes estimating an adjustment (106) that may be made to the internal clock in response to the time synchronization message. The method includes determining whether the latency calculated is less than the adjustment estimated (108). The method includes adjusting the internal clock (110) when the latency calculated is less than the adjustment estimated.

L'invention concerne des procédés et un appareil de synchronisation temporelle au moyen de seuils dynamiques. Un procédé permettant de synchroniser des éléments de réseau consistent notamment à recevoir au niveau d'un élément de réseau un message (102) de synchronisation temporelle envoyé par un élément d'horloge maîtresse. L'élément de réseau comporte une horloge interne à synchroniser avec une horloge maîtresse de l'élément d'horloge maîtresse. Le procédé consiste notamment à calculer un temps d'attente (104) du message de synchronisation temporelle, à estimer un réglage (106) pouvant être apporté à l'horloge interne en réponse au message de synchronisation temporelle, à déterminer si le temps d'attente calculé est inférieur au réglage estimé (108), et à régler l'horloge interne (110) lorsque le temps d'attente calculé est inférieur au réglage estimé.

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