一种自适应调整发送概率的无线传感器网络MAC协议

文章提出一种新的无线传感器网络MAC协议AMAC.AMAC是对S-MAC的扩展,克服了S-MAC采用固定竞争窗,无法适应网络负载变化的缺点.为不影响协议休眠激活周期的建立,文章提出固定竞争窗加p坚持的退避算法,当退避计数器减为零时,节点不是立即发送数据,而是以最优概率p发送.为确定p值,又推导出使平均发送能耗最小的p与活动节点数的关系,同时提出了活动节点数估计算法.最后通过仿真验证了AMAC协议的自适应性和能量有效性.

A New Adaptive Tuning Transmitting Probability MAC Protocol for Wireless Sensor Networks

In this paper,AMAC,a new Medium Access Control protocol for wireless sensor network is proposed.AMAC protocol is an extension of S-MAC,which overcomes the shortcoming of S-MAC.S-MAC protocol employs a fixed contention window,and when the number of nodes change,its performance would be reduced.In order to set up duty cycle expediently,a contention window plus p persist backoff algorithm is proposed,when the backoff counter decrease to zero,node transmits data packets according to a best probability p rather ...