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Belief-Propagation-Assisted Scheduling in Input-Queued Switches

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4 Author(s)
Atalla, S. ; Dipt. di Elettron. e Telecomun., Politec. di Torino, Turin, Italy ; Cuda, D. ; Giaccone, P. ; Pretti, M.

We consider the problem of scheduling the transmission of packets in an input-queued switch. In order to achieve maximum throughput, scheduling algorithms usually employ the queue length as a parameter for determining the priority to serve a given queue. In this work, we propose a novel scheme to optimize the performance of a preexisting scheduler. Our main idea is to assist the scheduling decision, considering "messagesâ rather than queue lengths. Such messages are obtained by running an iterative parallel algorithm, inspired by a rigorous belief-propagation approach. We demonstrate that belief-propagation-assisted scheduling is able to boost the performance of a given scheduler, reaching almost optimal throughput, even under critical traffic scenarios.

Published in:

Computers, IEEE Transactions on  (Volume:62 ,  Issue: 10 )

Date of Publication:

Oct. 2013

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