本文關(guān)鍵詞： 能量收集 無(wú)線傳感器 存儲(chǔ)損耗 容量衰減 瑞利衰落　出處：《工程科學(xué)與技術(shù)》2017年06期 　論文類型：期刊論文

【摘要】：針對(duì)能量收集無(wú)線傳感器網(wǎng)絡(luò)中傳感器節(jié)點(diǎn)電池存在存儲(chǔ)損耗和容量衰減特性的問(wèn)題,建立了末梢節(jié)點(diǎn)電池存儲(chǔ)損耗和容量衰減的通信模型,研究了無(wú)線傳感器生命周期內(nèi)吞吐量最大化的問(wèn)題。將系統(tǒng)優(yōu)化問(wèn)題轉(zhuǎn)化為凸優(yōu)化問(wèn)題,通過(guò)凸優(yōu)化分析得到與當(dāng)前能量收集水平、電池能量水平以及信道增益相關(guān)的信息傳輸功率控制策略;提出了適應(yīng)電池存儲(chǔ)損耗和容量衰減的雙功率閾值算法,用于優(yōu)化平均吞吐量;提出了最小化放電空間的電池充放電管理策略抑制電池容量的衰減速度,優(yōu)化無(wú)線傳感器的生命周期,并對(duì)無(wú)線傳感器生命周期與電池放電空間進(jìn)行理論估計(jì)。仿真結(jié)果表明,在不同電池存儲(chǔ)效率、放電空間比例下,本文提出的雙功率閾值算法相較于自適應(yīng)定向注水算法能夠通過(guò)減少電池的頻繁充放電次數(shù),降低收集能量的存儲(chǔ)損失,優(yōu)化了無(wú)線傳感器的平均吞吐量和生命周期,使生命周期內(nèi)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.
【作者單位】： 西安電子科技大學(xué)通信工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(61771366) 高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃資助項(xiàng)目(B08038)
【分類號(hào)】：TN929.5;TP212.9
【正文快照】： 能量收集系統(tǒng)通過(guò)收集外界能量解決了傳統(tǒng)無(wú)線傳感器網(wǎng)絡(luò)長(zhǎng)期工作的問(wèn)題[1 3],同時(shí)也提出了新的挑戰(zhàn)。外界能源隨時(shí)間隨機(jī)或者周期性變化,不能持續(xù)給無(wú)線傳感器提供足夠的能量[4];變化的通信環(huán)境會(huì)造成信息低能效傳輸[5];電池存在影響能量存儲(chǔ)效率的存儲(chǔ)損耗特性和影響電池生

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