Network synchronization for sdh/sonet

H - Electricity – 04 – L

Patent

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H04L 7/04 (2006.01) H04J 3/06 (2006.01) H04L 12/24 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2250489

24 In a synchronous network composed of a plurality of nodes that are connected in ring network topology and have unique codes respectively assigned thereto, stable and reliable synchronization and the simplified timing design can be easily achieved. At each of the nodes, a signal having a unique code for identifying a source node of a current synchronization clock is transmitted to an adjacent node. A local clock of the node is selected from a plurality of clocks depending on whether a unique code assigned to the node is identical to the unique code included in a received signal.

Un réseau synchrone composé d'un certain nombre de noeuds qui sont connectés suivant une topologie de réseau annulaire et ont des codes uniques qui leur sont affectés en propre permet facilement une synchronisation stable, fiable et simplifiée. A chacun des noeuds, un signal ayant un code unique pour identifier un noeud source d'une horloge de synchronisation donnée est transmis à un noeud adjacent. Une horloge locale du noeud est sélectionnée parmi un certain nombre d'horloges, la sélection exigeant que le code unique affecté au noeud soit identique au code unique contenu dans un signal reçu.

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