Abstract: This paper researches a new energy-ef?cient MAC protocol which is based on asynchronous duty cycling. Predictive- Wakeup MAC(PW-MAC) minimizes sensor node energy consumption by enabling senders to predict receiver’s wakeup times. However, PW-MAC protocol performs poorly in the dramatically changing traffic Wireless Sensor Network(WSN). Based on this problem, the paper proposes a Adaptive Duty Cycle MAC(ADC MAC) protocol that dynamically adjusts the node’s duty cycle based on the changing traffic. Simulation results show that ADC MAC reduces the packet transmission delay by 30% and increases the packet successful delivery ratio by 35% compared with PW-MAC.

Key words: Wireless Sensor Network(WSN), duty cycle, MAC protocol, dynamic traffic, energy efficiency, transmission delay

摘要： PW-MAC协议中发送者通过预测接收者的醒来时间来最小化传感器节点的能量消耗，但在无线传感器网络中，PW-MAC协议不能适应大幅流量的变化。为此，提出一种动态调整传感器节点占空比的MAC协议，该协议采用传感器的占空比，根据流量的变化进行动态调整。仿真结果证明，与PW-MAC协议相比，该协议数据包传输延时减少30%，数据包投递率提高35%。

关键词: 无线传感器网络, 占空比, MAC协议, 动态流量, 能量效率, 传输延时

CLC Number: 

• TP393