Method and apparatus for multi-layer network in sonet/sdh

H - Electricity – 04 – L

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H04L 12/56 (2006.01) H04J 3/14 (2006.01) H04J 3/16 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2470637

Each node of a telecommunications network determines a connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation costs involved in traversing from one connection routing layer to another connection type attributes and adaptation costs are included in a link state advertisement broadcasted by each node in the telecommunications network. A route calculation is performed for a desired signal to determine a route through the telecommunications network for the signal. The route calculation takes into account adaptation costs in determining the shortest route for the signal through the telecommunications network.

Chaque noeud d'un réseau de télécommunications définit des attributs types de connexion disponibles pour chaque type de signal pris en charge par ledit noeud. Chaque type de signal est représentatif d'une couche de routage de connexion différente du réseau de télécommunications. Les coûts d'adaptation que représente un transfert d'une couche de routage à d'autres attributs types de connexion sont notifiés dans une annonce d'état de liaison que chaque noeud diffuse dans le réseau de télécommunications. Il est réalisé un calcul de trajet pour un signal donné, afin de déterminer le trajet du signal dans le réseau de télécommunications. Ce calcul tient compte des coûts d'adaptation lorsqu'il détermine le trajet le plus court dans le réseau de télécommunications.

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