基于异步MAC协议的WSN节点通信能耗模型的研究及应用

为进一步减小采用B-MAC协议无线传感器节点的能量消耗,对无线通信模块接收、发送、监听、休眠的电流消耗和时间特性进行了实验测试. 并根据异步MAC协议的特点,将网络负载参数进一步细分,引入节点发送间隔、接收间隔、每次发送字节数、每次接收字节数这4个参量,同时考虑节点接收信号时所处状态的概率建立通信能耗模型,并给出能耗模型的最优解析解,使得能耗参数在不同网络负载和收发间隔下达到最优. 实验结果表明,采用能量最优参数的B-MAC协议比普通B-MAC协议的能量消耗更少,明显减少了WSN节点在通信过程中能量的消耗,延长了节点的工作寿命. 

Research and Application of WSN Node Communication Energy Consumption Model Based on Asynchronous MAC Protocol

To further reduce the energy consumption of wireless sensor node using B-MAC protocol, receiving, sending, monitoring, sleeping current consumption and time characteristics of wireless communication module were practically tested. According to the characteristics of asynchronous MAC protocol, network load parameters have been subdivided into four parameters: sending interval, receiving interval, the number of sending bytes each time, the number of receiving bytes each time of node and consider the probability of node status when it receives signal to build the communication energy consumption model. The optimal analytical solution of the communication energy consumption model was given. It makes energy consumption parameter to be optimal in different network load and transmission interval. Experimental results show that energy optimal parameters B-MAC protocol proposed in this paper consumes less energy than ordinary B-MAC protocol. It obviously reduces energy consumption during communication process of WSN nodes and extends the working life of the node.