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A dynamic stream link for efficient data flow control in NoC based heterogeneous MPSoC

As Systems-on-Chip size increase, the communication costs become critical and Networks-on-Chip (NoC) bring innovative solutions. Efficient stream-based protocols over NoC have been widely studied to address dataflow communications. They are usually controlled by a set of static parameters. However, new applications, such as high-resolution video decoders, present more data-dependent behaviors forcing communication protocols to support higher dynamicity. For this purpose, we present in this paper dynamic stream links for stream-based end-to-end NoC communications by introducing two link protocols, both independent of the transfer size, allowing to improve the hardware/software control flexibility. The proposed protocols have been modeled in a MPSoC virtual platform and the hardware cost evaluated. Based on simulations, we provide guidelines to exploit these protocols according to application needs.