Patent ID: 6643256
Filing Date: 2003-11-04
Classification: H04L

Abstract:
A packet switch, comprising:a plurality of input side transfer units from which packets are entered; a plurality of output side transfer units from which packets are outputted; a switching unit through which each packet entered from each input side transfer unit is switched to a desired output side transfer unit; a congestion status monitoring unit configured to monitor a congestion status of each transfer target to which each packet can be destined to reach within the packet switch; a priority level attaching unit configured to attach a priority level to each packet, according to the congestion status of a transfer target of each packet monitored by the congestion status monitoring unit; and a packet selection unit configured to select one packet that is to be transferred at a higher priority among colliding packets when a packet collision occurs within the switching unit, according to the priority level attached to each colliding packet.