改进的输入缓冲方案是在 ATM交换单元的输入队列和仲裁逻辑之间加入一个准随机存储器 .这个准随机存储器的作用是在保证去往同一出线的信元次序不变的条件下 ,信元可以随机争取出线 .作者计算了该方案的最大吞吐率、队列长度、信元丢失率、平均时延 ,并与三种典型的缓冲方案进行了比较 ,得知改进的输入缓冲方案具有一定优势 Improved input buffer scheme is to add a quasi-random access memory (SRAM) between input queues and arbitration logic of the ATM switching unit.The effect of this quasi-random access memory is that under the condition of keeping the order of the cells going to the same outgoing line unchanged, The author calculated the maximum throughput rate, queue length, cell loss rate, average delay and compared with three typical buffer solutions, and found that the improved input buffer scheme has some advantages