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<p><it>Abstract—</it>This paper proposes a simple, yet effective scheme to prevent congestion in a packet-switched multistage interconnection network (MIN) caused by <it>hot spots</it>. In this scheme, switches in the second and third stages of the MIN monitor their buffer occupancy to detect any notable nonuniform access behavior. When a switch detects congestion, packets generated by processors will be blocked from entering the congested switch until the congestion is cleared. Our scheme is compared with two well known schemes [<ref type="bib" rid="D05351">1</ref>], [<ref type="bib" rid="D05352">2</ref>], and shown to exhibit significantly better performance than these two.</p><p><it>Index Terms—</it>Congestion tree, packet-switching, multistage interconnection networks (MIN), hot spots, buffer occupancy.</p>

C. C. Chang, J. Liu and K. G. Shin, "Prevention of Congestion in Packet-Switched Multistage Interconnection Networks," in IEEE Transactions on Parallel & Distributed Systems, vol. 6, no. , pp. 535-541, 1995.
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