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On the stability of isolated and interconnected input-queueing switches under multiclass traffic

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4 Author(s)
Ajmone Marsan, M. ; Dipt. di Elettronica, Torino, Italy ; Leonardi, E. ; Mellia, M. ; Neri, F.

In this correspondence, we discuss the stability of scheduling algorithms for input-queueing (IQ) and combined input/output queueing (CIOQ) packet switches. First, we show that a wide class of IQ schedulers operating on multiple traffic classes can achieve 100% throughput. Then, we address the problem of the maximum throughput achievable in a network of interconnected IQ switches and CIOQ switches loaded by multiclass traffic, and we devise some simple scheduling policies that guarantee 100% throughput. Both the Lyapunov function methodology and the fluid modeling approach are used to obtain our results.

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Information Theory, IEEE Transactions on  (Volume:51 ,  Issue: 3 )