本文将 B-ISDN 中参加交换的信元(cells)划分为实时与非实时两类.当实时类信元超时时,就应将其从交换节点中去掉以减轻节点负载.这是一种简单的负载控制方法.本文分析了在非平衡负载以及存在时间溢出和空间溢出条件下,采用这种负载控制方法的输出排队、无阻塞快速分组交换(FPS)节点的吞吐量、时延和丢失率特性. In this paper, the cells involved in the exchange in B-ISDN are divided into real-time and non-real-time categories. When the real-time class cells expire, they should be removed from the switching nodes to reduce the node load. This is a simple This paper analyzes the throughput, delay and loss rate of output queuing and non-blocking fast packet switching (FPS) nodes under unbalanced load, and under the conditions of time overflow and space spillover. characteristic.