AGQ-MAC:无线传感器网络中基于Grid Quorum的异步低占空比MAC协议

AGQ-MAC:Asynchronous MAC Protocol Based Grid Quorum for Low Duty-cycled Wireless Sensor Networks

针对无线传感器网络占空比MAC协议在链路或节点失效环境下易导致严重的能量浪费问题,提出了一种基于Grid Quorum的异步低占空比M AC协议-AGQ-M AC(Asynchronous Grid Quorum M AC).AGQ-M AC采用Grid Quorum组分配信道,通过动态调配Quorum比率得到了节点的最优占空比,并在邻节点发现过程中采用双前导序文抽样来监测信道状态,以减少节点唤醒时间从而达到能量高效.仿真实验结果表明,与其他占空比MAC协议相比,AGQ-MAC延长了网络生存时间,降低了网络能耗,提高了邻发现数据传输率,同时保持较低的平均邻发现延迟.

To tackle the problem of serious energy waste of the duty cycled MAC Protocol for wireless sensor networks when existing the linking failures or failed nodes, an asynchronous low-duty cycle MAC Protocol based on Grid Quorum is proposed, and it is called Asynchronous Grid Quorum MAC （AGQ-MAC） as well. By adopting Grid Quorum group distribution channel and dynamic alloca- tion of Quorum ratio for AGQ-MAC, the optimal duty cycle is obtained. Meanwhile, channel status is monitored by dual preamble sampling in the process of neighbor discovery, and the awake time is reduced so as to achieve energy efficiency. The simulation ex- periments results show that AGQ-MAC prolongs the network lifetime, while reducing network energy consumption, increasing the av- erage neighbor delivery ratio, and maintaining the average neighbor discovery latency low.