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Packet-switched Networks-on-Chip (NoC) have been proposed as an efficient communication infrastructure for multi-core architectures. Adding virtual channels to a NoC helps to avoid deadlock and optimize the bandwidth of the physical channels in exchange for a more complex design of the routers. Another, possibly alternative, approach is to build multiple parallel physical networks (multi-planes) with smaller channels and simpler router organizations. The authors present a comparative analysis of these two approaches based on analytical models and on a comprehensive set of experimental results including both synthesized hardware implementations and system-level simulations.
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