H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 3/06 (2006.01) H04B 7/26 (2006.01)
Patent
CA 2316168
The invention relates to a wireless network with a plurality of network nodes, each of which consists of at least one electrical apparatus and at least one radio device which are arranged to exchange data via a wireless medium. A network node includes a clock supply for supplying all electrical apparatus and the radio device with its clock. A network node which is designated as a main network node transmits, via its radio device, a synchronization pattern which is dependent on the clock of its clock supply. All other network nodes, referred to as secondary network nodes, are assigned to different, hierarchically ordered distance classes in dependence on their distance from the main network node which is assigned to the highest distance class. All secondary network nodes of a distance class transmit, via their respective radio device, a synchronization pattern which is dependent on the clock of their respective clock supply and characterizes the distance class. A secondary network node synchronizes its clock supply by means of at least one received synchronization pattern of a hierarchically higher distance class.
L'invention porte sur un réseau sans fil comportant une série de noeuds comportant chacun au moins un appareil électrique et au moins un dispositif radio conçus pour échanger des données par l'intermédiaire d'un milieu sans fil. Un noeud de réseau comporte une source de signaux d'horloge alimentant tous les susdits appareils électriques et dispositifs radio. L'un des noeuds de réseau dit noeud principal transmet par l'intermédiaire de son dispositif radio un motif de synchronisation dépendant du signal d'horloge de la source de signaux d'horloge. Les autres noeuds dits noeuds secondaires sont répartis en classes ordonnées hiérarchiquement en fonction de leur distance du noeud principal lequel est classé dans la classe de distance la plus élevée. Les noeuds d'une même classe de distance émettent via leurs dispositifs radio respectifs un motif de synchronisation dépendant du signal d'horloge de leur propre source de signaux d'horloge et caractérisant leur classe de distance. Un noeud secondaire synchronise sa source de signaux d'horloge au moyen d'au moins un motif de synchronisation reçu correspondant à une classe de distance hiérarchiquement plus élevée.
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
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