title: The Study of Cross-layer Optimization for Wireless Rechargeable Sensor Networks Implemented in Coal Mines.
abstract: Wireless sensor networks deployed in coal mines could help companies provide workers working in coal mines with more qualified working conditions. With the underground information collected by sensor nodes at hand, the underground working conditions could be evaluated more precisely. However, sensor nodes may tend to malfunction due to their limited energy supply. In this paper, we study the cross-layer optimization problem for wireless rechargeable sensor networks implemented in coal mines, of which the energy could be replenished through the newly-brewed wireless energy transfer technique. The main results of this article are two-fold: firstly, we obtain the optimal relay nodes' placement according to the minimum overall energy consumption criterion through the Lagrange dual problem and KKT conditions; secondly, the optimal strategies for recharging locomotives and wireless sensor networks are acquired by solving a cross-layer optimization problem. The cyclic nature of these strategies is also manifested through simulations in this paper.
authors.affiliation: Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China. dingxu@hfut.edu.cn.
authors.forename: Xu
authors.initials: X
authors.lastname: Ding
authors.affiliation: School of Computer and Information, Hefei University of Technology, Hefei 230009, China. shilei@hfut.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
authors.affiliation: School of Computer and Information, Hefei University of Technology, Hefei 230009, China. hanjh@hfut.edu.cn.
authors.forename: Jianghong
authors.initials: J
authors.lastname: Han
authors.affiliation: Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China. jingtinglu_iiet@sina.com.
authors.forename: Jingting
authors.initials: J
authors.lastname: Lu
keywords: KKT conditions; Lagrange dual problem; coal mines; cross-layer optimization; wireless energy transfer; wireless rechargeable sensor networks
references.citation: Science. 2007 Jul 6;317(5834):83-6
references.pmid: 17556549
references.citation: IEEE J Emerg Sel Top Power Electron. 2015 Mar;3(1):215-225
references.pmid: 26640745