无线传感网中基于优化休眠时间的缓解能耗算法

发布时间：2018-05-29 10:15

本文选题：无线传感网 + 异常事件　；参考：《仪表技术与传感器》2017年02期

【摘要】：无线传感网络广泛应用于各类领域。而有限电池功率限制部署WSNs,降低节点能耗已成为研究焦点。保存能量的最常用方法就是节点采用休眠-唤醒机制。为此,提出基于优化休眠时间的缓解能耗算法(IST-REC)。IST-REC算法通过动态设置节点的休眠时间,进而提高节点的能量效率。IST-REC算法先建立感测异常事件模型,并预测下一件异常事件的发生率,然后依据节点剩余能量因子和数据危及度因子建立成本函数。通过成本函数平衡网络能耗和异常事件的检测时延间的矛盾。最后,通过对分法求解成本函数,得到最优的休眠时间。实验数据表明:提出的IST-REC算法能够有效地降低能耗,且在不增加检测异常事件时延的同时,延长了网络寿命。
[Abstract]:Wireless sensor networks are widely used in various fields. Limited battery power limits the deployment of WSNs to reduce node energy consumption has become the focus of research. The most common way to save energy is for nodes to use sleep-wake-up mechanism. In order to improve the energy efficiency of nodes, the IST-REC.IST-REC algorithm based on optimizing sleep time is proposed to establish the model of sensing abnormal events by dynamically setting the dormancy time of nodes. The occurrence rate of the next abnormal event is predicted and the cost function is established according to the residual energy factor of the node and the risk factor of the data. The contradiction between network energy consumption and detection delay of abnormal events is balanced by cost function. Finally, the optimal dormancy time is obtained by solving the cost function by the split method. Experimental data show that the proposed IST-REC algorithm can effectively reduce the energy consumption and prolong the network life without increasing the delay of detecting abnormal events.
【作者单位】：长治医学院生物医学工程系;复旦大学医学院生物医学工程系;
【基金】：国家自然科学基金资助项目(81070339) 山西省高校科技研究开发项目基金(20091025)
【分类号】：TP212.9;TN929.5

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