无线传感器网络多信道MAC协议研究

Research on Multi-channel MAC Protocol for Wireless Sensor Network

信道接入协议是无线传感器网络的研究重点之一,对网络的性能起着决定性的作用。采用一种基于随机访问模式的多信道接入的无线传感器网络MAC协议,将信道分为一个控制频道和N组数据频道。在控制频道上,参考图论的点着色原理给节点分配数据频道;在数据信道上,动态调整节点发射功率,并利用载波侦听芯片适时唤醒节点收发数据。实验表明,这种多信道、低功耗的MAC协议可以显著降低节点功耗,增加频率的空间复用度。

Channel access protocol is one of the important researching targets of wireless sensor network, and it plays a decisive role in the performance of network. By using a multi-channel wireless sensor network MAC protocol with random access, the channels are divided into one control channel and N sets of data channels. On the control channel, each node is assigned a data channel consulting the method of vertex coloring in graph theory. On the data channels, the node transmission power is adjusted dynamically, and the node is waken up for transmitting or receiving data by adopting carrier intercepting chip. The experimental results show that this proposed multi-channel MAC protocol greatly reduces the power consumption, and enhances the spatial reusing capability of frequency.