Buffer-Aided Energy Harvesting Relay Systems under Statistical Energy Underflow Constraint

1 This paper considers a two-hop communication system with buffer-aided energy harvesting relay node subject to statistical energy underflow constraint in terms of battery shortage probability. The half-duplex decode-and-forward relay is assumed to be equipped with an infinite size data buffer and a...

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Bibliographic Details
Published in2018 10th International Conference on Wireless Communications and Signal Processing (WCSP) pp. 1 - 6
Main Authors You, Benyao, Qiao, Deli
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2018
Subjects
Batteries
buffer-aided relay
Energy harvesting
energy underflow constraint
link selection
Optimization
Power control
Protocols
Relays
Throughput
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ISSN2472-7628
DOI10.1109/WCSP.2018.8555564

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Summary:1 This paper considers a two-hop communication system with buffer-aided energy harvesting relay node subject to statistical energy underflow constraint in terms of battery shortage probability. The half-duplex decode-and-forward relay is assumed to be equipped with an infinite size data buffer and a limited size energy harvesting battery. Perfect knowledge of the channel state information (CSI) of the system is assumed to be available at both the source and the relay. Optimal and ON/OFF power control policies with the associated optimal link selection policies under energy underflow constraints are proposed, which are irrespective of the instantaneous battery state. Closed-form characterizations in Rayleigh fading channels are derived. Numerical results are provided as well. It is shown that the proposed schemes can achieve superior performance than the naive power control, where the available energy is exhausted whenever relay transmits.
ISSN:2472-7628
DOI:10.1109/WCSP.2018.8555564