数据采集中延长WSN生存周期的研究与实现

无线传感器网络的生存周期将直接影响其在物联网中的应用价值,针对该问题进行了深入研究,最终实现生存周期的有效延长.通过组建简单稳定路由,为MAC层提供鲁棒通信路径的基础,从低功耗和减少数据包冲突概率两个角度出发,设计了周期性唤醒机制和FHPR算法.周期性唤醒机制使节点可以长期处于超低功耗状态;FHPR算法包括跳频列表和数据包重组机制两部分,前者有效减少冲突概率,后者在减少冲突概率的同时有效降低功耗.实验结果表明:由自主研发的节点组建成的无线传感器网络可以稳定运行,生存周期被有效延长.

Design and Implementation of Prolonging Life Cycle of WSN in Data Collection

The life cycle of WSN directly affects the application value in the Internet of things.According to the problem of how to prolong the life cycle of WSN,further study had been made on this issue.And ultimately the life cycle of WSN was effectively prolonged.Through the formation of simple and stable routing to provide the basis for robust communication path for the MAC layer,periodic sleep and wake-on-radio mechanism and FHPR algorithm were designed from the aspects of lowering power consumption and reducing the probability of packet collisions.The periodic sleep and wake-on-radio mechanism could allow the nodes in the ultra low-power state in a long term.The FHPR algorithm included frequency hopping table and the mechanism of packet regroupment,and the former could decrease the probability of data conflicts and the later could not only decrease the probability of data conflicts but also decrease the power consumption.Experimental results showed that the WSN constructed by the hardware platform can run stably and the life cycle has been prolonged obviously.