Method and device for delineating a data stream and...

Details Method and device for delineating a data stream and... Method and device for delineating a data stream and...

H - Electricity

04

L

H04L 7/04 (2006.01) H04J 3/06 (2006.01) H04L 1/00 (2006.01) H04L 12/00 (2006.01) H04L 29/08 (2006.01)

Patent

CA 2715810

The present invention is directed at a method of delineating a data stream transmitted by a communication system using a protocol stack. According to the invention, the method consists in utilizing the redundancy of sequences whose content is fixed on one or more layers in a protocol stack so as to delineate packets which are or are not erroneous in a continuous data stream; the method consisting for this purpose in searching at the level of the receiver for the sequences corresponding to a known sequence SP present on the stream received, doing so by detecting sequences similar to this known sequence, the non-similar sequences not being retained; the method consisting moreover, in the presence of similar sequences, in storing their position so as to determine the start of the packets.

La présente invention a pour objet un procédé de délinéation d'un flux de données transmis par un système de communication utilisant une pile de protocoles. Selon l'invention, le procédé consiste à exploiter la redondance de séquences dont le contenu est fixe sur une ou plusieurs couches dans une pile de protocoles pour délinéer des paquets erronés ou non dans un flux continu de données; le procédé consistant à cette fin à rechercher au niveau du récepteur des séquences correspondant à une séquence connue SP présente sur le flux reçu et cela par détection de séquences similaires à cette séquence connue, les séquences non similaires n'étant pas retenues; le procédé consistant en outre, en présence de séquences similaires, à mémoriser leur position pour déterminer le début des paquets.

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