Performance optimisation of multichannel MAC in large-scale wireless sensor network
Chuchu Dong, Shengzhong Feng, Fengqi Yu · International Journal of Sensor Networks · 2022
Efficient multichannel medium access control (MAC) protocols can significantly prolong the lifetime of sensor networks.In this paper, an energy-efficient prediction-based multichannel MAC protocol (PM-MAC) is proposed for large-scale wireless sensor networks (WSNs).PM-MAC minimises sensor node's idle listening time without introducing any multihop time synchronisation and channel assignment overhead by introducing a prediction mechanism of the target node's wakeup channel and wakeup time.PM-MAC introduces a dynamic channel allocation to achieve precise and quick resynchronisation when a prediction error occurs.In addition, in PM-MAC, the load can be well balanced on all channels.Finally, its prediction-based retransmission mechanism can achieve more energy efficiency in resolving severe wireless collisions caused by concurrent traffic in large-scale sensor network.The PM-MAC not only reduces multihop packet latency and energy consumption, but also increases network capacity and throughput.Experimental results confirm the outstanding performance of PM-MAC in all testbeds.