A novel arbitration mechanism for crossbar switch in wireless network-on-chip

Abstract

Wireless network-on-chip (WiNoC) has been introduced as an efficient communication paradigm that can provide high bandwidth and low latency wireless links among long-distance cores. However, the increase of demand for using these shared wireless links and the presence of few numbers of these channels on a chip leads to port contention in WiNoCs. This problem increases the average packet latency as well as the network latency. Therefore, a fair arbitration mechanism is required to eliminate port contention in wireless routers (WRs) and improve the utility of the output port. In this study, we propose a new arbitration mechanism for crossbar switch that can fairly allocate the port priorities based on the current traffic load and the wireless channel bandwidth. The simulation results under synthetic traffic patterns show that the proposed arbitration scheme reduces the average latency and improves the network throughput compared to round robin-based WiNoC.