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Open AccessArticle

An Optimal Online Resource Allocation Algorithm for Energy Harvesting Body Area Networks

by Guangyuan Wu 1,2,†,‡, Zhigang Chen 1,2,*,†,‡, Lin Guo 1,2,†,‡ and Jia Wu 1,2,†,‡
1
School of Software, Central South University, Changsha 410075, China
2
“Mobile Health” Ministry of Education-China Mobile Joint Laboratory, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Current address: School of Software, Central South University, Changsha 410075, China.
These authors contributed equally to this work.
Algorithms 2018, 11(2), 14; https://doi.org/10.3390/a11020014
Received: 10 November 2017 / Revised: 22 January 2018 / Accepted: 24 January 2018 / Published: 28 January 2018
(This article belongs to the Special Issue Online Algorithms)
In Body Area Networks (BANs), how to achieve energy management to extend the lifetime of the body area networks system is one of the most critical problems. In this paper, we design a body area network system powered by renewable energy, in which the sensors carried by patient with energy harvesting module can transmit data to a personal device. We do not require any a priori knowledge of the stochastic nature of energy harvesting and energy consumption. We formulate a user utility optimization problem. We use Lyapunov Optimization techniques to decompose the problem into three sub-problems, i.e., battery management, collecting rate control and transmission power allocation. We propose an online resource allocation algorithm to achieve two major goals: (1) balancing sensors’ energy harvesting and energy consumption while stabilizing the BANs system; and (2) maximizing the user utility. Performance analysis addresses required battery capacity, bounded data queue length and optimality of the proposed algorithm. Simulation results verify the optimization of algorithm. View Full-Text
Keywords: body area networks; energy management; energy harvesting; online resource allocation algorithm; Lyapunov optimization body area networks; energy management; energy harvesting; online resource allocation algorithm; Lyapunov optimization
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Wu, G.; Chen, Z.; Guo, L.; Wu, J. An Optimal Online Resource Allocation Algorithm for Energy Harvesting Body Area Networks. Algorithms 2018, 11, 14.

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