无线传感器网络T-MAC协议的研究

Research on T-MAC protocol of wireless sensor networks

自适应能量有效无线传感器网络T-MAC协议拥有一个自适应的休眠周期,动态地控制节点的活动状态时间来减少节点的空闲监听时间,有效地节约了节点的能量,同时还兼顾了网络的吞吐量。同时,由于无线传感器网络中不对称通信模式的存在,T-MAC协议存在早睡问题,很大程度上影响了网络的性能。根据中心极限定理,对T-MAC提出了一种改进设计,使其低负载时能耗更少,并一定程度上改善了早睡问题。

The T-MAC protocol for wireless sensor networks （WSNs）has an adaptive duty cycle. Dynamically ending the active part time can reduce the amount of energy wasted on idle listening, while still maintains a reasonable throughput. For the asymmetric communication in WSNs, the early sleeping problem affects the property of WSNs. According to the theorem of probability, some improving designs are put forward which reduces the energy waste further more and solves the early sleeping problem.