Distributed flow control and buffer management for Wireless Network-on-Chip

To bridge the widening gap between computation requirements of ubiquitous application and communication efficiency faced by gigascale multi-processor system-on-chip (MP-SoC) devices, a new on-chip communication system, dubbed wireless network-on-chip (WNoC), is proposed by using the recently developed CMOS ultra wideband (UWB) intrachip wireless communication. In this work, we propose a distributed flow control and buffer management strategy to improve WNoC end-to-end performance due to the close coupling between shared medium contention and network congestion. Such a strategy involves multiple mechanisms such as fast forwarding by prioritized contention, congestion aware traffic admission control, dynamic virtual output queuing with a shared buffer. The simulation results demonstrate the promising performance of the approach.