Deterministic selection of an optimal restoration route in a...

Details Deterministic selection of an optimal restoration route in a... Deterministic selection of an optimal restoration route in a...

H - Electricity

04

L

H04L 12/24 (2006.01) H04L 12/14 (2006.01) H04L 12/28 (2006.01) H04L 12/56 (2006.01) H04L 29/14 (2006.01) H04Q 3/00 (2006.01)

Patent

CA 2230493

Upon detection of a fault, the sender node (8) broadcasts a restoration message that includes a weighted identifier to tandem nodes (2, 4, 6, 12). Upon detection of an incoming restoration message, a tandem node (2, 4, 6, 12) retrieves the weighted identifier from the restoration message and modifies it with a weight associated with the spare link (100, 200) from which the restoration message was received. The modified weighted identifier is reinserted into the restoration message and the message is broadcast downstream. The chooser node (10) compares the weighted identifiers of received restoration messages and selects an alternate route with the best weighted identifier.

Lors de la détection d'une défaillance, le noeud (8) de l'émetteur diffuse un message de rétablissement qui comprend un identificateur pondéré à destination des noeuds en tandem (2, 4, 6, 12). Lors de la détection d'un message de rétablissement entrant, un noeud en tandem (2, 4, 6, 12) extrait l'identificateur pondéré du message de rétablissement et le modifie avec un poids associé à la liaison de réserve (100, 200) à partir de laquelle le message de rétablissement a été reçu. L'identificateur pondéré modifié est réinséré dans le message de rétablissement et le message est diffusé en aval. Le noeud (10) du sélectionneur compare les identificateurs pondérés des messages de rétablissement reçus et sélectionne une autre route avec le meilleur identificateur pondéré.

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