Aiming at the problem of global communication management and reliability design in application-specific Network on Chip (NoC)

the concept of network monitor is introduced

which monitors overall network real-time conditions and implements path allocation algorithm.Then a novel dynamic routing scheme based on Network Monitor called DyRS-NM is presented.The proposed scheme has the ability to discover and deal with both congestion and permanent faults and distinguish them from transient faults.DyRS-NM can avoid transient faults by using retransmission scheme

and also can detour congested and permanently faulted links by recalculating routing paths.The RTL-level circuits design of the network monitor and fault-tolerant router are realized

and experimental results with a MPEG4 decoder application mapped onto network monitor based 44 mesh NoC architecture verify the system performance and cost of area and power consumption.Compared to both static XY routing and fault-aware dynamic routing FADR

significant performance improvements can be achieved by using the DyRS-NM scheme with acceptable additional cost.