SCOQ, a high performance fast packet switch with shared concentration and output queueing supports, point-to-point transmissions only. The incorporation of multicast (point-to-multipoint) functions require packet duplications. If the copy network were placed on the feedforward path of the switch, it is not transparent to, and can interfere with, point-to-point switching. By placing the copy network in the feedback position, its operation can be made transparent to the point-to-point information transfer. The copy network incorporated onto the SCOQ switch is non-blocking even without an arbitration or selection network. Contrary to the feedforward approach in which the input buffers must be centrally controlled, with the copy network in the feedback loop, the input buffers all operate independent of each other.>

The SCOQ switch is a Batcher-banyan based high performance fast packet switch with shared concentration and output queueing, with a maximum of L(>

A space-division, nonblocking packet switch with data concentration and output buffering is proposed. The performance of the switch is evaluated with respect to packet loss probability, the first and second moments of the equilibrium queue length and waiting time, throughput, and buffer overflow probability. Numerical results indicate that the switch exhibits very good delay-throughput performance over a wide range of input traffic. The switch compares favorably with some previously proposed switches in terms of fewer basic building elements used to attain the same degree of output buffering.>

The SCOQ switch is a Batcher-banyan-based high-performance fast packet switch with shared concentration and output queuing, with a maximum of L(>

A space-division, nonblocking packet switch with data concentration and output buffering is proposed. The performance of the switch is evaluated with respect to packet loss probability, the first and second moments of the equilibrium queue length and waiting time, throughput, and buffer overflow probability. Numerical results indicate that the proposed switch exhibits very good delay-throughput performance over a wide range of input traffic. The proposed switch compares favorably with the knockout switch of Y. Yeh et al. (1987) in terms of implementation complexity and packet concentration performance, and with the sunshine switch of J. Giacopelli et al. (1989) and the modular architecture proposed by T. Lee (1990) in terms of fewer basic building elements used to attain the same degree of output buffering.>