A Network on Chip Architecture for Heterogeneous Traffic Support with Non-Exclusive Dual-Mode Switching

As the multi-core processors era took place, several design concerns have risen. Interconnection layer efficiency has gained particular relevance as a crucial issue to be addressed in order to leverage the large amount of on-chip resources that today´s VLSI technologies are able to provide. At the same time, as the architectural parallelism will continue to grow and become more fine-grained, the kind of traffic generated by the different multithreaded applications is turning out to be very wide-ranging in terms of size and burstiness. In order to adapt to this large variety of traffic to be supported, several models of dual-mode routers have been developed, implementing both packet switching and circuit switching techniques, thus supporting both best effort and guaranteed throughput services. This paper introduces an innovative model of non-exclusive dual-mode router, able to combine the aforementioned features in a non exclusive way (i.e.: in parallel inside the network on the same link). This feature makes this NoC architecture well-suited for multi-processor system on-chip (MPSoC) architectures with a high level of parallelism which have to deal with heterogeneous traffic conditions, such as massively parallel processors (MPPs) and processor arrays (PAs).