OB-DETA: Observation-based directional energy transmission algorithm in energy harvesting networks

Haneul Ko, Sangheon Pack

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


In directional energy transmissions, a radio frequency (RF) energy source needs to monitor each sector to achieve higher RF energy transmission efficiency. However, since the location of harvesting nodes can be dynamically changed in mobile environments, it is difficult to obtain the exact numbers of harvesting nodes and the distance between harvesting nodes and the RF energy source in all sectors within limited time. In such a situation, the operations of the RF energy source (i.e., monitoring sectors and transmitting the RF energy) can be modeled by a partially observable Markov decision process (POMDP), which has high complexity to be solved. As a practical solution, we propose an observation-based directional energy transmission algorithm (OB-DETA) that estimates the efficiency of energy transmission in sectors and transmits the RF energy to the selected sectors with high energy transmission efficiency (i.e., sectors with lots of non-fully-charged harvesting nodes around the RF energy source). Evaluation results are given to demonstrate the effectiveness of OB-DETA over the comparison schemes in terms of the RF energy transmission efficiency.

Original languageEnglish
Article number8718094
Pages (from-to)168-176
Number of pages9
JournalJournal of Communications and Networks
Issue number2
Publication statusPublished - 2019 Apr

Bibliographical note

Funding Information:
Manuscript received March 5, 2018; approved for publication by Dusit Tao Niyato, Division III, July 16, 2018. A preliminary version of this paper was presented at International Conference on ICT Convergence (ICTC) 2017, Jeju Island, Korea, Oct. 2017 [1]. This work was supported in part by National Research Foundation (NRF) of Korea Grant funded by the Korean Government (MSIP) (No. 2017R1E1A1A01073742) and in part by Institute for Information & Communications Technology Promotion (IITP) grants funded by the Korea government (MSIT) (No. 2015-0-00575, Global SDN/NFV Open-Source Software Core Module/Function Development). H. Ko is with Korea University and he was a visiting postdoctoral fellow in University of British Columbia, Vancouver, BC, Canada, email: ko.haneul@gmail.com. S. Pack is with the School of Electrical Engineering, Korea University, Seoul, Korea, email: shpack@korea.ac.kr. S. Pack is the corresponding author. Digital Object Identifier: 10.1109/JCN.2019.000015

Funding Information:
This work was supported in part by National Research Foundation (NRF) (No. 2017R1E1A1A01073742)

Publisher Copyright:
© 2011 KICS.


  • Directional antenna
  • energy harvesting
  • partially observable Markov decision process (POMDP)
  • radio frequency (RF) energy
  • wireless power transmission (WPT)

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications


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