摘要： 在无线传感器网络(WSN)中，降低能耗会引发端到端时延的增加。为兼顾能耗和时延的平衡，提出一种基于动态占空比的WSN介质访问控制协议。通过计算节点利用率、平均睡眠延时，结合占空比上下限，动态调整节点占空比，使其更好地适应网络实时通信流量。实验结果表明，该协议在线性拓扑中比S-MAC节能52%，延迟减少35%，在网状拓扑中比S-MAC节能68%，延迟减少46%。

关键词: 无线传感器网络, 介质访问控制协议, 占空比, 平均时延

Abstract: Lowering the energy consumption may result in higher latency Wireless Sensor Network(WSN). To address such a tradeoff, this paper proposes a Media Access Control(MAC) protocol based on dynamic duty cycle. It adjusts duty cycle dynamically based on utilization, average sleeping delay, and the upper and lower bound of duty cycle. Experimental results show that the MAC protocol saves energy about 52% and reduces latency by 35% from S-MAC in a chain topology. In the cross topology, it achieves 68% energy saving and 46% latency reduction from S-MAC.

Key words: Wireless Sensor Network(WSN), Media Access Control(MAC) protocol, duty cycle, average delay

中图分类号: 

• TP393