Abstract: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.