Method and system for efficient flow control for client data...

H - Electricity – 04 – J

Patent

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H04J 3/14 (2006.01)

Patent

CA 2529600

A method and system for flow control of GFP-encapsulated client data frames over SONET/SDH transport networks is described. Transport interfaces, in the form of port cards, have FIFO buffers for receiving the GFP frames. In acknowledgment of the received frames, a transmitting transport interface receives an acknowledgement in form of a returned frame sequence number tag along with the available capacity in bytes of the buffer of the receiving transport interface. With a continuous update of buffer capacity and tracking the number of bytes in transit to the receiving transport interface, the transmitting transport interface maximizes the utilization of the channel through the SONET/SDH transport network, even with dropped frames or dropped acknowledgment tags.

La présente invention concerne un procédé et un système de régulation de flux de données client encapsulées dans des trames GFP (Generic Framing Protocol) via des réseaux de transport SONET/SDH (Synchronous Optical NETwork / Synchronous Digital Hierarchy). Les interfaces de transport, qui sont des cartes de ports, comportent des tampons en liste directe (FIFO) pour la réception des trames GFP. Pour l'accusé de réception des trames reçues, une interface de transport émettrice reçoit un accusé de réception sous forme d'une étiquette à numéro d'ordre de trame en retour ainsi que la capacité disponible en octets du tampon de l'interface de transport réceptrice. La mise à jour en continu de la capacité de tampon et le suivi du nombre d'octets en transit jusqu'à l'interface de transport réceptrice permettent à l'interface de transport émettrice de maximiser l'utilisation du canal via le réseau de transport SONET/SDH, même en tenant compte des étiquettes de trames ou d'accusés de réception abandonnés.

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