Two-Levels of Adaptive Buffer for Virtual Channel Router in NoCs
NoC designs are based on a compromise of latency, power dissipation or energy, usually defined at design time. However, setting all parameters at design time can cause either excessive power dissipation (originated by router underutilization), or a higher latency. Moreover, routers with virtual channels have larger buffer sizes and more complex control, increasing the total costs. The situation worsens whenever the application changes its communication pattern, i.e., when a portable phone downloads a new service. In this paper, the authors propose the use of a two-level adaptive buffer for a virtual channel router, where the buffers units and the virtual channels are dynamically allocated to increase router efficiency in a NoC, even under rather different communication loads.