Patent ID: 7330918
Filing Date: 2008-02-12
Classification: H04L

Abstract:
1. A packet buffer management system used for simulating statuses of transferring packets having a variable length in an IP network, comprising: a packet type identification control portion attaching a TAG information for identifying a service class to a received packet, which is of a variable length and is transferred in an IP network, according to an identification information of the received packet and outputting the received packet with the TAG information, a buffer memory to store the received packet; and a buffer management control portion to control writing and reading the received packet attached with the TAG information to and from said buffer memory, wherein the buffer management control portion includes, a service class characteristic table setting characteristics for each packet in advance for the simulation of statuses of transferring packets having a variable length in an IP network by defining a packet control operation for each received packet, corresponding to a service class, which is identified by the TAG information; a conversion table in which allocated areas of said buffer memory corresponding to service classes are stored, and a packet output control portion controlling packets to output from the buffer memory, wherein said conversion table modifies the allocated areas of said buffer memory according to the number of service class settings in said service class characteristic table and defines output physical ports, the areas of the buffer memory being allocated based on said output physical ports, and said packet output control portion managing the areas of the buffer memory from which packets are to be read out and the order and timing of reading out the packets, according to contents stored in the conversion table, so as to perform the characteristics for each packet set in the service class characteristics table.