Fault Injection-based Evaluation of a Synchronous NoC Router

This paper evaluates fault-tolerant behavior of an NoC router through simulation-based method. A structural-level VHDL environment has been employed to estimate fault injector signal’s (FIS) effects. Different fault models such as dead clause, stuck-then, micro-operation, crosstalk, and SEU have been injected to evaluate the transient faults ’ effects. According to the results, up to 48 % of the injected faults cause system failure and also about 51 % are overwritten before turning into errors. Less than 1 % of injected faults treat as latent errors. The average of fault latency has been investigated as 194ns. Almost 70%, 31%, and 35 % of injected faults are overwritten in buffer, routing unit, and switch components, respectively. Routing unit is also recognized as the most tenuous component. 1