基于二次反馈的两级交换结构

摘要

To relax the time constraint on scheduling algorithms of FTSA (feedback-based two-stage switch architecture ), a new scheme called DFTS ( double-feedback-based two-stage switch architecture) was proposed. This switch architecture feeds back twice at both ends of each time slot. Based on the double-feedback mode and the relay scheduling mode, the DFTS enables the cell transmission to take place in parallel with the first-stage scheduling process and thus extends the time space of the scheduling algorithm at the cost of an additional N-bit feedback ( N is the number of input/output ports). The theoretical analysis shows that the DFTS has the same performance and feasibility as compared with the FTSA.%为缓解FTSA(feedback-based two-stage switch architecture)对调度算法执行时间的限制,提出了一种基于二次反馈的两级交换结构DFTS(double-feedback-based two-stage switch architecture).该结构通过二次反馈和接力调度模式,以多反馈一次N位缓存信息的代价拓展了调度算法的时域空间(N为交换端口数).理论分析表明:在相同条件下,DFTS的时延性能与FTSA的理论性能是一致的.