周期性数据采集无线传感器网络的设计

Design of Wireless Sensor Network for Periodic Data Collection

针对小范围内周期性数据的采集特点,采用改进的免冲突周期调度算法,实现了无线传感器网络中各节点对信道的时分复用,避免了因监听和对信道的竞争而消耗更多的能量.讨论了算法对网络容量和同步周期的限制,给出了确定累积误差和同步消息发布周期的方法.无线收发模块采用硬件支持IEEE 802.15.4协议的CC2430芯片,设计了满足该协议中MAC层的各类帧结构,以及传感器节点和汇聚节点的通信程序.

Presented a kind of improved contention-free periodic schedule arithmetic to realize wireless sensor networks of TDMA, which could meet the need of small area periodic data collection. Sensor nodes in the WSNs avoided excessive listening and colliding, so that they cost less energy. The paper discussed networks capacity and synchronization period, and provided the method to fix on accumulated error and synchronization period. The chip CC2430 specifically tailored for IEEE 802.15.4 was used as RF transceiver. Frame formats of MAC layer were designed and the communication program of sensor nodes and sink node was realized.