一种高能效无线传感器网络MAC协议研究

Study on a High Energy Efficiency of Wireless Sensor Network MAC Protocol

摘要:

为了解决无线传感器网络中MAC层空闲侦听、冲突和控制开销所带来的无效功耗等问题,提出了一种高能效无线传感器网络动态非等分时隙MAC新方法;该方法依据网络拓扑和监测类型分析了覆盖率模型,设计了通过选举最低剩余能量节点为休眠节点的动态选举算法,推导得到了非等分配时隙协议的算法公式,同时,采用簇内单向广播的时钟同步算法保证了网络节点拥有相同的时间基准;在无线传感器测试床上进行仿真对比实验,结果表明该方法较好地实现了动态调节工作节点数量和非等分传输时隙的协议功能,MAC层的能量有效性显著提高;该方法可有效使用网络能量,延长网络生命周期,是一种高能效的无线传感器网络MAC协议。

关键词:无线传感器网络;MAC协议;非等分时隙;动态选举

Abstract:

In order to solve the wireless sensor network MAC layer idle listening, conflict and control overhead to bring invalid power cost, a new energy-efficient wireless sensor network MAC dynamic new method of non-decile slot is proposed. Based on the type of network topology and monitor the coverage analysis model, a dynamic voting algorithm is designed by election minimum residual energy code. One-way broadcast of the cluster clock synchronization algorithm ensures network nodes having the same time reference. Based on wireless sensor test bed the simulation experimental results show that the method has the good protocol functions which adjust the number of nodes and non-decile transmission slots dynamically, and significantly improve the energy efficiency of the MAC layer. The method can effectively use a network of energy and prolong the network life cycle, which is an energy-efficient MAC protocol for wireless sensor networks.

Key words:wireless sensor networks; MAC protocol; non-average-slot; dynamic vote