姚信威,钟礼斌,王万良,杨双华.基于混合储能结构的能量捕获无线通信信道容量分析[J].计算机科学,2018,45(2):165-170, 188
基于混合储能结构的能量捕获无线通信信道容量分析
Capacity Analysis of Energy Harvesting Wireless Communication Channel Based on Hybrid Energy Storage
投稿时间:2016-12-09  修订日期:2017-04-06
DOI:10.11896/j.issn.1002-137X.2018.02.029
中文关键词:  混合储能,能量捕获,信道容量,能量分配,能量到达过程
英文关键词:Hybrid energy storage,Energy harvesting,Channel capacity,Energy assignment,Energy arrival process
基金项目:本文受国家自然科学基金资助
作者单位E-mail
姚信威 浙江工业大学计算机科学与技术学院 杭州310023 xwyao@zjut.edu.cn 
钟礼斌 浙江工业大学计算机科学与技术学院 杭州310023  
王万良 浙江工业大学计算机科学与技术学院 杭州310023  
杨双华 浙江工业大学计算机科学与技术学院 杭州310023
拉夫堡大学计算机系 莱斯特郡LE113TU 
 
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中文摘要:
      针对现有能量捕获技术存在能量来源不稳定、储能设备容量有限等特点,提出了一种基于超级电容和电池的混合储能结构,并建模分析其相应的通信信道容量性能。首先,针对点对点能量捕获无线通信系统,建立基于混合能量存储结构的通信信道模型。其次,根据能量捕获的随机特性,假设能量到达过程符合伯努利随机过程,提出了一种近似最优能量分配策略,推导出系统平均吞吐量的上、下界限及其常数差值,并进一步求得系统近似信道容量。最后,通过实验验证了在捕获能量小于和大于超级电容储能容量两种情形下,系统信道容量上、下界的恒定差值分别为1.77bps/Hz和2.49bps/Hz;同时,相比传统节点采用电池作为单一储能结构,混合能量存储结构能够有效提高系统的能量利用率,增大系统的信道容量,当超级电容储能容量与电池储能容量的比例为12时,信道容量的上界 可提升到70%。
英文摘要:
      Due to the constraints of the instability of energy source and the limited storage capacities of devices in exis-ting energy harvesting technology,a hybrid energy storage structure composed by super capacitor and battery was proposed for device,and the corresponding channel capacity of the proposed structure model was analyzed.Firstly,an energy harvesting channel model based on hybrid energy storage structure was presented for a point-to-point energy harvesting communication system.Secondly,by considering the intermittent peculiarities of energy harvesting,this paper assumed that the energy arrival process conforms to the Bernoulli stochastic process.A near optimal allocation policy was proposed with the upper and lower bounds of the average system throughput.In particular,the gap of two bounds is derived to be a constant,then the approximate channel capacity is obtained.Finally,simulation results illustrate that the gap between the upper and lower bounds of channel capacity is 1.77bps/Hz and 2.49bps/Hz respectively,when harvesting energy is less than and more than storage capacity of super capacitor.Meanwhile, the experiment results show that compared with the conventional wireless node with single battery storage,the hybrid energy storage structure can improve the energy utilization and increase the channel capacity of system.The upper bound of channel capacity can be increased up to 70% when the storage capacity ratio of supper capacitor and battery is 12.
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