G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 1/12 (2006.01) H04B 7/26 (2006.01) H04J 3/06 (2006.01) H04Q 7/30 (2006.01)
Patent
CA 2331963
The present invention relates to a method and apparatus for synchronising at least one node (N1-N4) in a net (n), which node (N1-N4) is used as an example for packet oriented transmission. A server (C), generating a stable frequency (fs), and the node (N1-N4) measures the number of cycles of the stable frequency (fs) respective the number of cycles of a local frequency (f1-f4), generated by the node (N1-N4). These measurements are started respective stopped at the instant of time when a phase of a signal, generated by a power network (PN) connected to the server (C) and the node (N1-N4), equals zero. The results of the measurements are compared and the node (N1-N4) is adjusted accordingly. Measurements can continuously be performed by the server (C) and the node (N1-N4).
L'invention concerne un procédé et un appareil de synchronisation d'au moins un noeud (N¿1?-N¿4?) d'un réseau (n). Ce noeud (N¿1?-N¿4?) est utilisé comme exemple de transmission orientée paquet. Un serveur (C) qui génère une fréquence stable (f¿s?), et le noeud (N¿1?-N¿4?) mesurent le nombre de cycles de la fréquence stable (f¿s?) et le nombre de cycles d'une fréquence locale (f¿1?-f¿4?) qui est générée par le noeud (N¿1?-N¿4?). Ces mesures sont commencées et stoppées dès que la phase d'un signal, générée par un réseau de puissance (PN) relié au serveur (C) et au noeud (N¿1?-N¿4?), est égale à zéro. Les résultats ainsi obtenus sont comparés et le noeud (N¿1?-N¿4?) est ajusté en conséquence. Les mesures sont réalisées en continu par le serveur (C) et le noeud (N¿1?-N¿4?).
Lundqvist Stellan
Westberg Lars
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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