Patent ID: 6388993
Filing Date: 2002-05-14
Classification: H04L

Abstract:
An asynchronous transfer mode (ATM) switch for controlling cell input into a switching element using a back-pressure signal comprising:a buffer pool for storing cells input to the switch; a buffer pool control part for storing buffer pool occupancy information per input port of the buffer pool; a threshold control part receiving the buffer pool occupancy information from said buffer pool control part and calculating a threshold per input port periodically and then sending information regarding said threshold to said buffer pool control part; said buffer pool control part increasing a threshold value of an input port having a high buffer pool occupancy rate and decreasing a threshold value of an input port having a low buffer pool occupancy rate relatively to buffer pool occupancy rate of the rest of the input ports; an input crosspoint control part controlling the cells input to said buffer pool by receiving a control signal from said buffer pool control part based on threshold values of the input ports; and an output crosspoint control part controlling the cells output from said buffer pool by receiving the control signal from said buffer pool control part.