Performance of an ATM LAN switch with back-pressure function

Traffic control schemes for ATM networks can be classified into two categories: reactive congestion control and preventive congestion control. Reactive congestion controlcan be effective in ATM local area networks as well as preventive congestion control. A possible scheme to realize efficient reactive congestion control is a switch architecture, which possesses buffers on both sides of input and output ports with a back-pressure function. Especially, when this switch is applied to ATM LANs for data transfer services, its performance should be evaluated by taking into account the bursty traffic, which is a main purpose of the current paper. In this paper, we show the maximum throughput, the packet delay distribution, and the approximate packet loss probability of such an ATM switch with back-pressure function under bursty traffic through an analytic method. In addition to a balanced traffic condition, unbalanced traffic and a mixture of bursty and stream traffic are also considered. Through numerical examples, we show the effects of the average packet length and the output buffer size on the perfomance of the switch quantitively.