On the provision of quality-of-service guarantees for input queued switches
IEEE Communications Magazine
On the speedup required for work-conserving crossbar switches
IEEE Journal on Selected Areas in Communications
Teletraffic: Theory and Applications
Teletraffic: Theory and Applications
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The existing forward planning conflict-free (FPCF) packet switches are designed for fixed-size packets and synchronous operation mode. In this paper an asynchronous FPCF packet switch for variable-size packets is proposed. The key problem of efficient packet insertion procedure was solved by introduction of a so-called quasi-synchronous record array arrangement. A performance evaluation based on simulations is provided in terms of throughput, delay and loss probability. The limited maximum switch throughput is a deficiency of the presented asynchronous FPCF packet switch. In most cases, utilization of over 90% can be achieved by using multiple traffic flows, while preserving proper packet order. Maximum packet delays are comparable to those produced by output-queued packet switches. By comparing FPCF and virtual-output-queued packet switches a conclusion is drawn that FPCF switch produces both, lower maximum packet delays and lower packet delay variations.