Efficient Routing Table Minimization for Fault-Tolerant Irregular Network-on-Chip

Table-based routing is a common approach for a fault-tolerant Network-on-Chip (NoC). This approach is hard to scale, since the table size tends to grow according to the NoC size. To surpass this problem, some works, such as the Region-Based Routing (RBR), have proposed techniques for saving routing tables area. This work proposes an alternative routing technique finding among communication pairs selected by the RBR technique, shrinking the amount of bits used for setting up regions. The experimental results have shown that the proposed technique reduces the maximum and mean number of regions, decreasing the space used by routing tables, providing more scalable and efficient routing NoC.