Abstract: There are some drawbacks in ATM switch unifying buffer: complicated structure, lack of expansibility and difficulties in ensuring to ensure high throughput. With distributed buffers, Banyan ATM switch structured by 2×2 switch elements is a convenient model to avoid the above disadvantages. This paper analyzes the maximum throughput, cell lost ratio, average delay time of 2×2 ATM switch element by output queuing or middle queuing, and studies the performance of Banyan ATM switch structured by 2×2 switch elements.

Key words: ATM switching, distributed buffer, output queuing, middle queuing