Method for managing a list of packets in an output port of a...

Details Method for managing a list of packets in an output port of a... Method for managing a list of packets in an output port of a...

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 29/06 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2412629

The invention concerns a method for taking into account priority levels which consists in storing in a processing queue, in their arrival sequence for retransmission in the output port, packet identifiers to be retransmitted and in carrying out, by backtracking step by step through the processing queue, a series of pairing comparisons of the identifiers present in the processing queue, using a bank of working registers (RD) and maintaining in the bank of working registers (RD) the identifier concerned at the end of each comparison as the earliest in the highest priority level, said operations being carried out in a queue memory (224) managed by means of four pointers: a read pointer (P¿L?), a write pointer (P¿E?), an auxiliary read pointer (P¿AL?) and an auxiliary write pointer (P¿AE?).

Ce procéde permet de tenir compte des niveaux de prioritésil con siste à stocker dans une file de traitement, dans leur ordre d'arrivée pour réémission dans le port de sortie, les identificateurs des paquets à réémettre et à effectuer, en remontant pas à pas la file de traitement, une succession de comparaisons deux à deux des identificateurs présents dans la file de traitement, en s'aidant d'un banc de registres de travail (RD) et en maintenant dans le banc de registre de travail (RD) l'identificateur considéré en fin de chaque comparaison comme le plus ancien dans le niveaux de priorité le plus élevé, ces opérations s'effectuant dans une mémoire de liste d'attente (224) gérée au moyen de quatre pointeurs: un pointeur de lecture PL, un pointeur d'écriture PE, un pointeur auxiliaire de lecture PAL et un pointeur auxiliaire d'ecriture PAE.

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