Patent ID: 7508768

Claim:
A traffic measurement system comprising: a plurality of measurement devices that collect packets flowing through Internet links between routers, extract traffic data required to analyze traffic from the collected packets, and process the extracted data into predetermined flow types; and an analysis server that identifies applications of traffic by analyzing the traffic data transferred from measurement devices, classifies the identified applications into predetermined traffic types, and outputs the classification result, and the traffic types comprise: a first traffic type whose applications are identified using only TCP/UDP port numbers; a second traffic type whose application is identified by collecting application headers and application signatures that are included in payloads of the packets; a third traffic type whose applications are identified by extracting application data from the second traffic type, since application data is not included in reverse traffic of the second traffic type; a forth traffic type whose applications are assigned predetermined port numbers are identified based on application signature of other flows since the port numbers are exchanged through an other control flow; and a fifth traffic type whose applications are not classified into the first through the fourth traffic types.