A method of filtering high data rate traffic

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01) G06F 17/30 (2006.01)

Patent

CA 2633528

A method of filtering high data rate traffic (2) based on its content, the method comprising identifying candidate fixed size partial strings (3) within the traffic; comparing characters within the candidate partial string with a content addressable memory (1) containing wanted partial string values and identifying matching traffic; wherein the partial string content includes at least one anchor character (7); wherein the partial string size is set to a predetermined number of characters adjacent to the anchor character; and, wherein partial strings ending in an anchor character are compared with wanted partial string values in the content addressable memory.

L'invention porte sur un procédé de filtrage de trafic (2) à haut débit en fonction de son contenu. Ledit procédé consiste: à identifier dans le trafic des chaînes partielles (3) candidates de taille déterminée; à comparer les caractères de la chaîne partielle candidate à une mémoire (1) à contenu adressable contenant les chaînes partielles désirées; et à identifier le trafic correspondant. Le contenu d'une chaîne partielle comprend au moins un caractère d'ancrage (7). La taille de la chaîne partielle est fixée à un certain nombre de caractères adjacents au caractère d'ancrage. Les chaînes partielles se terminant par un caractère d'ancrage sont comparées aux valeurs des chaînes partielles désirées de la mémoire à contenu adressable.

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