Finite-Horizon Energy-Efficient Scheduling With Energy Harvesting Transmitters Over Fading Channels

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2017-09-01

Author

BACINOĞLU, BARAN TAN
Uysal, Elif
Koksal, Can Emre

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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In this paper, energy-efficient transmission schemes achieving maximal throughput over a finite time interval are studied in a problem setting, including energy harvests, data arrivals, and channel variation. The goal is to express the offline optimal policy in a way that facilitates a good online solution. We express any throughput maximizing energy-efficient offline schedule (EE-TM-OFF) explicitly in terms of water levels. This allows per-slot real-time evaluation of transmit power and rate decisions, using estimates of the associated offline water levels. To compute the online power level, we construct a stochastic dynamic program that incorporates the offline optimal solution as a stochastic process. We introduce the immediate fill measure, which provides a lower bound on the efficiency of any online policy with respect to the corresponding optimal offline solution. The online algorithms obtained this way exhibit performance close to the offline optimal, not only in the long run but also in short problem horizons, deeming them suitable for practical implementations.

Subject Keywords

Energy-efficient communication, Throughput maximization, Energy harvesting transmitters, Energy harvesting, Energy causality, Data causality, Water-filling, Time-varying channels, Stochastic dynamic programming, Offline scheduling, Online scheduling

URI

https://hdl.handle.net/11511/48123

Journal

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS

DOI

https://doi.org/10.1109/twc.2017.2718544

Collections

Department of Electrical and Electronics Engineering, Article

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Citation Formats

B. T. BACINOĞLU, E. Uysal, and C. E. Koksal, “Finite-Horizon Energy-Efficient Scheduling With Energy Harvesting Transmitters Over Fading Channels,” IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, pp. 6105–6118, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48123.