Loop-type network system and controlling of path thereof

H - Electricity – 04 – L

Patent

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Details

H04L 12/437 (2006.01) H04L 12/56 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2242487

A network system which has an exact measure for solving a defect and therefore is very reliable and a method for setting a path thereof. With a plurality of node devices, each of which has a local communication device that is a source of data, an ATM-method loop-type network is built. In the case that a local communication device (21-1) and a local communication device (21-2) transmit data interactively, a communication path (41) for transmitting data and a communication path (42) for receiving data are formed by separate paths at both sides of a loop, and a spare communication path (43) is formed in the reverse direction, When any fault occurs on the transmission path, a loopback is conducted between the node devices which are adjacent to the fault point using the spare communication path to recover the communication path.

L'invention concerne un système réseau, lequel est parfaitement en mesure de résoudre un défaut et est donc très fiable, ainsi qu'un procédé d'établissement d'un trajet de celui-ci. A l'aide d'une pluralité de dispositifs nodaux, possédant chacun un dispositif de communication local constituant une source de données, on construit un réseau du type en boucle fonctionnant en MTA. Lorsqu'un dispositif de communication local (21-1) et un dispositif de communication local (21-2) transmettent des données de manière interactive, un trajet de communication (41) destiné à transmettre des données ainsi qu'un trajet de communication (42) destiné à recevoir des données sont formés par des trajets séparés situés des deux côtés d'une boucle, et il se forme un trajet de communication de rechange (43) dans la direction inverse. Lorsqu'il se produit un défaut quelconque sur le trajet de transmission, il s'effectue un bouclage entre les dispositifs nodaux adjacents au point défectueux, à l'aide du trajet de communication de rechange, afin de récupérer le trajet de communication.

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