无线传感器网络自适应占空比媒体访问控制协议

M/M/1/n-based media access control protocol in wireless sensor network with adaptive duty cycle

为了减少无线传感器网络能量耗损,通过分析排队论单服务台排队系统模型,结合已有的低占空比无线传感器网络节点媒体访问控制协议和层次网络的结构特点,提出了一种改进的自适应调节占空比无线传感器网络节点媒体访问控制协议.该协议通过节点的队列模型预测下一周期的数据量,从而能够自适应的调整其占空比,降低网络节点的能量消耗.在网络仿真平台上对改进后协议的性能进行了评估.仿真结果表明,在保持网络性能的前提下,改进后协议比无线传感器网络节点媒体访问控制协议的能耗减少48%,延迟减少21%,吞吐量增加33%,显著地延长了整个无线传感器网络的寿命.

To reduce energy consumption, a media access control protocol in wireless sensor network with adaptive duty cycle was proposed based on the single-server queuing system. The protocol used the node＇s queue model to predict the number of data of next period and then adjusted the nodes＇ duty cycle to reduce energy consumption. The simulation results show that the protocol saves energy about 48 %, reduces latency 21% and increases throughput 33 % than the basic media access control protocol under the premise of keeping the network performance, which means the protocol effectively prolongs the net- work lifetime.