Patent ID: 7009937
Filing Date: 2006-03-07
Classification: H04L

Abstract:
1. A transmission queue managing system for managing a queue serving packets in a packet switch, said transmission queue management system comprising: a differentiating portion for differentiating a header information of a received packet to produce a differentiated result signal, an adding portion connected to said differentiating portion for adding a discard priority bit to said received packet in response to said differentiated result signal supplied from said differentiating portion, a buffering memory connected to said adding portion for memorizing said received packet to which said priority bit is added to join said received packet to said queue, and a discarding portion for collectively discarding packets each of which said priority bit represents high priority from said queue when the number of packets of said queue coincides with a predetermined threshold, wherein said differentiating portion comprises: an information memorizing portion for memorizing at least one packet header pattern, and a retrieving portion connected to said information memorizing portion for deciding whether all or a predetermined part of said header information of said received packet is memorized in said information memorizing portion as said packet header pattern or not to produce said differentiated result signal when all or said predetermined part of said header information coincides with said packet header pattern, and wherein said packet header pattern is a bit stream that represents one of a network protocol, a transfer protocol and a destination address.