能量收集的无线传感器节点能量管理策略

发布时间：2018-02-01 21:36

本文关键词： 能量收集无线传感器存储损耗容量衰减瑞利衰落　出处：《工程科学与技术》2017年06期 　论文类型：期刊论文

【摘要】：针对能量收集无线传感器网络中传感器节点电池存在存储损耗和容量衰减特性的问题,建立了末梢节点电池存储损耗和容量衰减的通信模型,研究了无线传感器生命周期内吞吐量最大化的问题。将系统优化问题转化为凸优化问题,通过凸优化分析得到与当前能量收集水平、电池能量水平以及信道增益相关的信息传输功率控制策略;提出了适应电池存储损耗和容量衰减的双功率阈值算法,用于优化平均吞吐量;提出了最小化放电空间的电池充放电管理策略抑制电池容量的衰减速度,优化无线传感器的生命周期,并对无线传感器生命周期与电池放电空间进行理论估计。仿真结果表明,在不同电池存储效率、放电空间比例下,本文提出的双功率阈值算法相较于自适应定向注水算法能够通过减少电池的频繁充放电次数,降低收集能量的存储损失,优化了无线传感器的平均吞吐量和生命周期,使生命周期内的吞吐量最大化。
[Abstract]:Aiming at the problem of storage loss and capacity attenuation of sensor node battery in energy collection wireless sensor network, a communication model of storage loss and capacity attenuation of terminal node battery is established. In this paper, the problem of maximizing the throughput in the lifetime of wireless sensor is studied. The system optimization problem is transformed into a convex optimization problem, and the current energy collection level is obtained by convex optimization analysis. Cell energy level and channel gain related information transmission power control strategy; A dual-power threshold algorithm adapted to storage loss and capacity attenuation is proposed to optimize the average throughput. A battery charge and discharge management strategy to minimize the discharge space is proposed to reduce the attenuation rate of the battery capacity and optimize the life cycle of the wireless sensor. The lifetime of the wireless sensor and the battery discharge space are estimated theoretically. The simulation results show that under different battery storage efficiency and discharge space ratio. Compared with the adaptive directional water injection algorithm, the dual-power threshold algorithm proposed in this paper can reduce the storage loss of energy collection by reducing the frequent charge and discharge times of the battery. The average throughput and life cycle of the wireless sensor are optimized to maximize the throughput in the life cycle.
【作者单位】：西安电子科技大学通信工程学院;
【基金】：国家自然科学基金资助项目(61771366) 高等学校学科创新引智计划资助项目(B08038)
【分类号】：TN929.5;TP212.9
【正文快照】： 能量收集系统通过收集外界能量解决了传统无线传感器网络长期工作的问题[1 3],同时也提出了新的挑战。外界能源随时间随机或者周期性变化,不能持续给无线传感器提供足够的能量[4];变化的通信环境会造成信息低能效传输[5];电池存在影响能量存储效率的存储损耗特性和影响电池生

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