Patent ID: 6122253
Filing Date: 2000-09-19
Classification: H04L,H04Q

Abstract:
An ATM network switch comprising a buffer means for buffering the flow of ATM cells and a congestion control mechanism comprising:means for storing tot each virtual connection (VC) through the switch a predetermined value Max, representing the maximum permissible number of ATM cells which may be stored in the buffer means for the VC;means responsive to the arrival of a new ATM cell at the buffer means for determining the total number of cells TSC currently stored in the buffer means and the number of cells VcCnt stored for the respective VC for the new ATM cell;means for determining the remaining capacity BS of the buffer means;calculating means for calculating an adjusted value Max' of Max as a function of TSC and BS; andmeans for comparing Max' with VcCnt and for discarding the cell it VcCnt is greater than or equal to Max'.