A Low-Complexity Policy for Outage Probability Minimization With an Energy Harvesting Transmitter

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Isikman A. O., YÜKSEL TURGUT A. M., Gunduz D.

IEEE COMMUNICATIONS LETTERS, vol.21, no.4, pp.917-920, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 4
  • Publication Date: 2017
  • Doi Number: 10.1109/lcomm.2016.2641418
  • Journal Name: IEEE COMMUNICATIONS LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.917-920
  • Keywords: Energy harvesting, outage probability, power allocation, fading channels, FADING CHANNELS, COMMUNICATION-SYSTEMS, CONSTRAINTS, ALLOCATION
  • Middle East Technical University Affiliated: No

Abstract

Outage probability in an energy harvesting (EH) block-fading communication system is studied in the finitehorizon online setting. First, the offline version of the problem is considered, and formulated as a mixed integer linear program (MILP). Then, the infinite-horizon online problem (IIL) is considered relaxing the battery constraints. Solutions of these two problems provide lower bounds on the finite-horizon online problem, for which we provide a low-complexity heuristic scheme, called the fixed threshold transmission (FTT) scheme. Numerical results show that the FTT scheme achieves an outage performance close to the MILP lower bound for a wide range of operation regimes, and close to IIL when the EH rate is low. It is also observed that the power allocated by the FTT scheme resembles the optimal offline solution with high probability, despite the lack of information about future channel states and energy arrivals.