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Integrating uni- and multicast scheduling in buffered crossbar switches

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2 Author(s)
Mhamdi, L. ; Comput. Eng. Lab., Tech. Univ. Delft ; Vassiliadis, S.

Internet traffic is a mixture of unicast and multicast flows. Integrated schedulers capable of dealing with both traffic types have been designed mainly for input queued (IQ) buffer-less crossbar switches. Combined input and crossbar queued (CICQ) switches, on the other hand, are known to have better performance than their buffer-less predecessors due to their potential in simplifying the scheduling and improving the switching performance. The design of integrated schedulers in CICQ switches has thus far been neglected. In this paper, we propose a novel CICQ architecture that supports both unicast and multicast traffic along with its appropriate scheduling. In particular, we propose an integrated round robin based scheduler that efficiently services both unicast and multicast traffic simultaneously. Our scheme, named multicast and unicast round robin scheduling (MURS), has been shown to outperform all existing schemes while keeping simple hardware requirements. Simulation results suggested that we can trade the size of the internal buffers for the number of input multicast queues

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High Performance Switching and Routing, 2006 Workshop on

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