Apparatus for implementing a lightweight, reliable,...

H - Electricity – 04 – L

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H04L 29/08 (2006.01) H04L 12/46 (2006.01) H04L 12/56 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2508748

A fast, lightweight, reliable, packet-based protocol (ABC) that operates independent of the type of networking protocol used by the underlying physical layer of the network is disclosed. More specifically, the packet based protocol operates independently of or is capable of encapsulating over physical layer protocols such as but not limited to MAC, Ethernet, Ethernet II, HARD or IP. The protocol defines at least three different types of frames including Information frames, Supervisory frames, and Unnumbered frames. In various embodiments of the invention, the Information, Supervisory, and Unnumbered frames include DSAP and SSAP field with semantics which are sufficiently large to support the various physical layer protocols that may be used on the network. The Information frames, Supervisory frames, and Unnumbered frames also have the ability to support urgent data delivery and certain memory management functions. The protocol is further capable of support the multiplexing of layers higher than the protocol so that multiple higher layer applications may share the same connection. Finally, the protocol of the present invention supports both flow control and congestion control, to help reduce the incidence of lost or dropped packets at a receiving node or over the network respectively.

L'invention concerne un protocole de transport par paquets fiable, léger et rapide, fonctionnant quel que soit le type de protocole de communication utilisé par la couche physique sous-jacente du réseau. Plus précisément, le protocole fonctionne indépendamment ou est capable d'encapsuler des protocoles de couche physique tels que, sans en exclure d'autres, MAC, Ethernet, Ethernet II, HARD ou IP. Ce protocole définit au moins trois types différents de trames, y compris des trames d'informations, des trames de supervision et des trames non numérotées. Dans divers modes de réalisation de l'invention, les trames d'informations, de supervision et les trames non numérotées comprennent un champ DSAP et SSAP avec une sémantique suffisamment grande pour prendre en charge les divers protocoles de couche physique qui peuvent être utilisés sur le réseau. Les trames d'informations, de supervision et les trames non numérotées peuvent également prendre en charge la livraison de données urgentes et certaines fonctions de gestion de mémoire. Ce protocole est également capable de prendre en charge le multiplexage de couches supérieures au protocole afin que plusieurs applications de couche supérieure puissent partager la même connexion. Finalement, le protocole de la présente invention prend en charge le contrôle de flux et le contrôle de congestion, pour réduire l'incidence de perte de paquets ou d'abandon de paquets au niveau d'un noeud de réception ou sur le réseau, respectivement.

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