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Optimal data collection in wireless sensor networks with correlated energy harvesting

Kishor Patil (UGent) , Koen De Turck and Dieter Fiems (UGent)
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Abstract
We study the optimal data collection rate in a hybrid wireless sensor network where sensor data is collected by mobile sinks. In such networks, there is a trade-off between the cost of data collection and the timeliness of the data. We further assume that the sensor node under study harvests its energy from its environment. Such energy harvesting sensors ideally operate energy neutral, meaning that they can harvest the necessary energy to sense and transmit data, and have on-board rechargeable batteries to level out energy harvesting fluctuations. Even with batteries, fluctuations in energy harvesting can considerably affect performance, as it is not at all unlikely that a sensor node runs out of energy, and is neither able to sense nor to transmit data. The energy harvesting process also influences the cost vs. timeliness trade-off as additional data collection requires additional energy as well. To study this trade-off, we propose an analytic model for the value of the information that a sensor node brings to decision-making. We account for the timeliness of the data by discounting the value of the information at the sensor over time, we adopt the energy chunk approach (i.e. discretise the energy level) to track energy harvesting and expenditure over time, and introduce correlation in the energy harvesting process to study its influence on the optimal collection rate.
Keywords
Value of information, Correlated energy harvesting, Markov process, Sensor networks

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Citation

Please use this url to cite or link to this publication:

Chicago
Patil, Kishor, Koen De Turck, and Dieter Fiems. 2018. “Optimal Data Collection in Wireless Sensor Networks with Correlated Energy Harvesting.” Annals of Telecommunications.
APA
Patil, K., De Turck, K., & Fiems, D. (2018). Optimal data collection in wireless sensor networks with correlated energy harvesting. Annals of Telecommunications.
Vancouver
1.
Patil K, De Turck K, Fiems D. Optimal data collection in wireless sensor networks with correlated energy harvesting. Annals of Telecommunications. Springer Nature; 2018;
MLA
Patil, Kishor, Koen De Turck, and Dieter Fiems. “Optimal Data Collection in Wireless Sensor Networks with Correlated Energy Harvesting.” Annals of Telecommunications (2018): n. pag. Print.
@article{8585901,
  abstract     = {We study the optimal data collection rate in a hybrid wireless sensor network where sensor data is collected by mobile
sinks. In such networks, there is a trade-off between the cost of data collection and the timeliness of the data. We further
assume that the sensor node under study harvests its energy from its environment. Such energy harvesting sensors ideally operate energy neutral, meaning that they can harvest the necessary energy to sense and transmit data, and have on-board rechargeable batteries to level out energy harvesting fluctuations. Even with batteries, fluctuations in energy harvesting can considerably affect performance, as it is not at all unlikely that a sensor node runs out of energy, and is neither able to sense nor to transmit data. The energy harvesting process also influences the cost vs. timeliness trade-off as additional data collection requires additional energy as well. To study this trade-off, we propose an analytic model for the value of the information that a sensor node brings to decision-making. We account for the timeliness of the  data by discounting the value of the information at the sensor over time, we adopt the energy chunk approach (i.e. discretise the energy level) to track energy harvesting and expenditure over time, and introduce correlation in the energy harvesting process to study its influence on the optimal collection rate.},
  author       = {Patil, Kishor and De Turck, Koen and Fiems, Dieter},
  issn         = {0003-4347},
  journal      = {Annals of Telecommunications},
  keyword      = {Value of information,Correlated energy harvesting,Markov process,Sensor networks},
  publisher    = {Springer Nature},
  title        = {Optimal data collection in wireless sensor networks with correlated energy harvesting},
  url          = {http://dx.doi.org/10.1007/s12243-018-0688-6},
  year         = {2018},
}

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