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On optimal online algorithms for energy harvesting systems with continuous energy and data arrivals

Rezaee, M ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1109/LWC.2017.2674660
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2017
  4. Abstract:
  5. Energy harvesting (EH) has been developed to extend the lifetimes of energy-limited communication systems. In this letter, we consider a single-user EH communication system, in which both of the arrival data and the harvested energy curves are modeled as general functions. Unlike most of the works in the field, we investigate the online algorithms which only acquire the causal information of the arrival data and the harvested energy processes. We study how well the optimal online algorithm works compared with the optimal offline algorithm, and thus our goal is to find the lower and upper bounds for the ratio of the completion time in the optimal online algorithm to the optimal offline algorithm. We propose two online algorithms which achieve the upper bound of 2 on this ratio. Also, we show that this ratio is 2 for the optimal online algorithm. © 2012 IEEE
  6. Keywords:
  7. Data models ; Data structures ; Energy harvesting ; Continuous energy ; Energy harvesting systems ; Limited communication ; Lower and upper bounds ; Off-line algorithm ; On-line algorithms ; Optimal scheduling ; Time minimization ; Online systems
  8. Source: IEEE Wireless Communications Letters ; Volume 6, Issue 3 , 2017 , Pages 286-289 ; 21622337 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/7864424