Protected routing in a communication network

Details Protected routing in a communication network Protected routing in a communication network

H - Electricity

04

L

H04L 12/56 (2006.01)

Patent

CA 2382323

This invention relates to routing in a communication network. The invention offers a method to make a protected routing through all the layers of a communication network. The bottom layer is the foundation for all protected routes. The routing order is from bottom to top. First, the first layer above the bottom layer is routed into the bottom layer. The links which do not need protection can be routed via the shortest path. The links which need protection are routed in a way that there exist two, as short as possible, separate paths. The other links are routed in a similar way. Finally the top layer is routed into the layer below the top layer.

Cette invention concerne l'acheminement au sein d'un réseau de communication. Le procédé selon l'invention garantit un acheminement protégé à travers toutes les couches d'un réseau de communication. La couche inférieure constitue la base de toutes les voies protégées. L'ordre d'acheminement va du bas vers le haut. Tout d'abord, la première couche au-dessus de la couche inférieure est acheminée dans ladite couche inférieure. Les liaisons qui ne nécessitent pas de protection peuvent être acheminées par la voie la plus courte. En revanche, les liaisons qui requièrent une protection sont acheminées de manière à ce qu'il y ait deux voies distinctes, aussi courtes que possible. Les autres liaisons sont acheminées de manière analogue. Enfin, la couche supérieure est acheminée dans la couche qui lui est immédiatement inférieure.

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