Ring/mesh optical network

Details Ring/mesh optical network Ring/mesh optical network

H - Electricity

04

J

H04J 14/00 (2006.01) H04B 10/00 (2006.01) H04B 10/20 (2006.01) H04J 14/02 (2006.01) H04J 14/08 (2006.01) H04Q 11/00 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2320833

A plurality of optical cross-connect switches (OCCS B, OCCS C, OCCS D) are freely interconnected (302, 304, 306, 308, 310, 312) to form a mesh type network (202). At least three of the optical cross-connect switches are switched to form a line-switched ring network, thereby forming a ring/mesh network (202). Simply by changing the switching logic of the optical cross- connect swithes within the ring/mesh network, new rings can be created and existing rings can be modified, thereby providing a great deal of flexibility to make changes to the network as traffic patterns change without incurring hardware costs or significant network downtime. Another advantage of the ring/mesh design approach is that spare capacity within the line-switched ring can be utilized by the mesh network, and spare capacity within the mesh network can be utilized by the line-switched ring, thereby significantly increasing the spare efficiency.

Plusieurs commutateurs reliés optiquement (OCCS B, OCCS C, OCCS D) interconnectés librement (302, 304, 306, 308, 310, 312) forment un réseau maillé (202), et trois au moins de ces commutateurs forment un réseau annulaire commuté en ligne c.-à-d. un réseau annulaire/maillé (202). Une simple modification de la logique de commutation des commutateurs du réseau permet de créer de nouveaux anneaux ou de modifier les anneaux existants, d'où une grande souplesse d'adaptation du réseau aux variations de structure du trafic, n'impliquant pas de coûts en matériel, ni d'interruption significative du fonctionnement. Un autre avantage réside dans la possibilité d'utiliser la capacité de réserve du réseau en créant des anneaux commutés en ligne, ce qui améliore nettement l'utilisation desdites réserves.

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