Drop from front of buffer policy in feedback networks

Details Drop from front of buffer policy in feedback networks Drop from front of buffer policy in feedback networks

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 12/24 (2006.01) H04L 29/02 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2215934

A method for transmitting packets or cells (or both) in a communications network (10) is disclosed. The packets or cells are transmitted along a forward communications path in a network from a source node (h1) via one or more intermediary nodes (r1, x1, r6 and r2) to a destination node (h4). At the intermediary nodes (r1, x1, r5 or r2), the packets or cells are received in a buffer (38 or 42-1 to 42-4). The packets or cells are transmitted along the forward communications path according to a communications schedule. In the presence of congestion at one of the intermediary nodes (x1), an indication of the congestion (302-342) is provided to the destination nodes (h4) of the first packets to be transmitted according to the schedule. An indication of the congestion of the first packets or cells is provided by the destination nodes (h4) of the first packets or cells to the source nodes (h1) of the first packets or cells via a feedback communications path.

L'invention est une méthode de transmission de paquets ou de cellules (ou de combinaisons de paquets et de cellules) dans un réseau de communication (10). Les paquets ou les cellules sont transmis dans un trajet de communications d'un réseau, d'un noeud source (h1) à un noeud de destination (h4) via un ou plusieurs noeuds intermédiaires (r1, x1, r6 et r2). Aux noeuds intermédiaires (r1, x1, r5 ou r2), les paquets ou les cellules sont reçus dans un tampon (38 ou 42-1 à 42-4). Les paquets ou les cellules sont transmis sur le trajet de communication selon l'ordonnancement des communications. En cas de congestion à l'un des deux noeuds intermédiaires (x1), une indication de cette congestion (302-342) est transmise aux noeuds de destination (h4) des premiers paquets à être transmis selon l'ordonnancement. L'indication de la congestion des premiers paquets ou des premières cellules est transmise par les noeuds de destination (h4) des premiers paquets ou des premières cellules aux noeuds sources (h1) des premiers paquets ou des premières cellules via un trajet de rétroaction.

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