【摘要】 研制了一种可扩展的大容量 ATM交换结构的交换控制系统 .该系统采用双输入共享 ,在引入较小的硬件开销下 ,使丢失率达到要求 .通过采用流水线式的高度并行的寻径控制技术 ,降低了交换控制系统的速率要求 .并在此基础上 ,用 EPLD完成了硬件实现更多还原

【Abstract】 Double input sharing is introduced into the switch fabric of grouping 15×15 crossbar with fan out of five. The satisfactory performance can be obtained with low hardware costs. The theoretical analysis and simulation both show that the cell loss probability can reach level of 10 -7 under the condition of uniform traffic with arrival rate of 0.9. The switch control system consists of the path hunt processing unit (PHPU) and the input expand controller (IEC). To meet the need of speed, the addressing quests. The IEC distributes the fan out link for the shared input. The switch path is established. Considering the high complexity of the system, an EPLD based circuit is designed to realize the switch system.更多还原