Traffic-aware reconfigurable architecture for fault-tolerant 2D mesh NoCs

Abstract

With the aggressive scaling of the VLSI technology, Networkson-Chip (NoCs) are becoming more susceptible to faults. Therefore, designing reliable and efficient NoCs is of significant importance. The rerouting approach which is employed in most of the fault-tolerant methods causes the network performance to degrade considerably due to taking longer paths and creating hotspots around the faults. Moreover, they cannot adapt to the dynamic traffic distribution in the network. Considering the increasing demands for real-time systems, the necessity for designing reconfigurable and robust NoCs is even more pronounced. In this paper, a dynamically reconfigurable technique is proposed to address faulttolerance and minimal routing in mesh NoCs. To accomplish this goal, the router architecture is modified to enable the frequently communicating nodes to bypass the faulty router and communicate through shorter paths. Thus, not only the rerouting is minimized, the connectivity of the network is maintained in the vicinity of faults. The experimental results validate the performance and reliability of the proposed technique with a small hardware overhead.

Low‐cost regional‐based congestion‐aware routing algorithm for 2D mesh NoC

“…When the congestion is removed, it sends the information to the desired router; thus, it prevents packet destruction and improves the system's output. Moreover, Bahrebar et al 29 used a dynamically reconfigurable technique, which creates a fault‐tolerant system using the shortest path routing. The routers frequently contact each other to detect a router's failure.…”

A Review of Design Approaches for Enhancing the Performance of NoCs at Communication Centric Level

“…This fault tolerant architecture reduced latency and improved reliability as compared to normal mesh. The authors in [75] presented a reconfigurable fault tolerant technique for bypassing faulty routers. It modified the router structure and used Dynamic XY (DyXY) routing which makes it robust for deadlock and livelock also.…”