基于节点流量的低能耗无线传感器网络MAC协议

An Energy-Efficient MAC Protocol Based on Traffic of Nodes for Wireless Sensor Networks

根据传感器节点的生存时间取决于节点能量消耗的特点,设计了节能的MAC协议.提出了一种基于节点流量的低能耗无线传感器网络MAC协议TBEE-MAC(traffic-based energy efficient MAC).在TBEE-MAC中,节点采用周期性休眠机制来节省能量,提出了活动时间结构和基于节点流量的同步调度方式,在时间误差允许的范围内,调整了同步调度周期,减少了能量消耗.仿真显示,TBEE-MAC在提供低延时性能的基础上,能量有效性相对于S-MAC协议有很大提高.

According to that the lifetime of sensor nodes depends on their energy consumption, an energy-efficient MAC （medium access control） protocol was designed to prepare the TBEE-MAC, i.e., the traffic based energy-efficient MAC protocol for wireless sensor networks, where the traffic refers to the nodes in network. In the TBEE-MAC protocol the sensor nodes sleep periodically to save energy, and a listening time framework with relevant synchronous scheduling based on traffic of nodes are suggested, which can readjust the periods of the synchronous scheduling within the range the time error is permitted to reduce energy consumption. Simulation results showed that TBEE-MAC obviously outperforms S-MAC in energy efficiency with shorter time-delay available.