Inverse multiplexing of digital data

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04L 12/26 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2263478

In ATM networks, digital data in ATM cells are sent to a destination node over more than one transmission link in round robin fashion. This is called inverse multiplexing. At connection start-up, the source node informs the destination node of the specific round robin fashion of the transmission links so that the ATM cells are reassembled in a proper sequential order. Inverse multiplexing control cells are used to communicate between the source node and destination node for connectivity testing of transmission links. Cell stuffing is also provided in one embodiment to accommodate non-synchronized links among transmission links. In a particular embodiment, two consecutive control cells indicate a stuffing cell. A start-up procedure is described when not all the transmission links are usable.

Dans les réseaux ATM, les données numériques contenues dans des cellules ATM sont envoyées à un noeud cible par plus d'une liaison de transmission selon un mode circulaire. On appelle ce procédé "multiplexage inverse". A l'établissement de la connexion, le noeud source informe le noeud cible du procédé circulaire spécifique des liaisons de transmission, de façon que les cellules ATM soient réassemblées selon un ordre approprié. Des cellules de commande de multiplexage inverse sont utilisées pour communiquer entre le noeud source et le noeud cible, de façon à tester la connectivité des liaisons de transmission. Dans l'un des modes de réalisation, le bourrage des cellules permet l'adaptation à des liaisons non synchronisées existant parmi les liaisons de transmission. Dans un mode de réalisation particulier, deux cellules de commande consécutives indiquent un bourrage de cellule. Une procédure d'établissement de connexion peut être employée quand certaines liaisons de transmission ne sont pas utilisables.

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