Implications of Rent´s Rule for NoC Design and Its Fault-Tolerance

Rent´s rule is a powerful tool for exploring VLSI design and technology scaling issues. This paper applies the principles of Rent´s rule to the analysis of networks-on-chip (NoC). In particular, a bandwidth-version of Rent´s rule is derived, and its implications for future NoC scaling examined. Hop-length distributions for Rent´s and other traffic models are then applied to analyse NoC router activity. For fault-tolerant design, a new type of router is proposed based on this analysis, and it is evaluated for mutability and its impact on congestion by further use of the hop-length distributions. It is shown that the choice of traffic model has a significant impact on scaling behaviour, design and fault-tolerant analysis