Work Group 1 ( For Technologies ) TITLE : A Fast and Efficient Buffer Sharing Scheme for an Input Buffer ATM Switch

In this paper a fair and fast buffer sharing scheme based on the round robin cell distribution mechanism for an input buffer ATM switch is proposed. This buffer sharing scheme improves the performance of the input buffer ATM switch in terms of the cell loss ratio and the CDV by equalizing the occupancy of input buffers. In order to make the equalizing and buffer sharing operation fast and simple, the proposed buffer sharing scheme uses a dynamic threshold by which input buffers are separated into two groups according to their occupancy. The buffer sharing scheme equalizes the buffer occupancy of input buffers by distributing incoming cells to the input buffers of lower occupancy first. The performance of the proposed buffer sharing scheme is evaluated by computer simulation. The result shows that the input buffer ATM switch adopting the buffer sharing scheme outperforms those with conventional input buffer schemes based on virtual output queue (VOQ) and the simple round robin in terms of the cell loss ratio, the maximum throughput and the CDV.