In this article we have given an overview of different scheduling algorithms for virtual output queuing switches. We have also proposed three new scheduling algorithms for VOQ switches called Hierarchical Round-Robin Matching (HRRM), Matching Matching with Random Selection (MMRS) and Maximal Matching with Round-Robin Selection (MMRRS). Evaluation of the proposed algorithms was performed under Bernoulli and bursty packet arrivals with uniform and non-uniform distributions to output ports. Performance evaluation of the proposed algorithm under different traffic models is given and compared with other well-known algorithms. The simulation results show that MMRRS and HRRM achieves 100% throughput and low MTD for high loads.
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