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On the stability of input-queued switches with speed-up

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4 Author(s)
E. Leonardi ; Dipartimento di Elettronica, Politecnico di Torino, Italy ; M. Mellia ; F. Neri ; M. A. Marsan

We consider cell-based switch and router architectures whose internal switching matrix does not provide enough speed to avoid input buffering. These architectures require a scheduling algorithm to select at each slot a subset of input buffered cells which can be transferred toward output ports. We propose several classes of scheduling algorithms whose stability properties are studied using analytical techniques mainly based upon Lyapunov functions. Original stability conditions are also derived for scheduling algorithms that are being used today in high-performance switch and router architectures

Published in:

IEEE/ACM Transactions on Networking  (Volume:9 ,  Issue: 1 )