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Energy-Efficient Path Selection Using SNR Correlation for Wireless Multi-Hop Cooperative Communications

Author

Listed:
  • In-Ho Lee

    (Department of Electrical, Electronic and Control Engineering, Hankyong National University, Anseong 17579, Korea)

  • Haejoon Jung

    (Department of Information and Telecommunication Engineering, Incheon National University, Incheon 22012, Korea)

Abstract

In this paper, we consider partial path selection (PPS) for a multi-hop decode-and-forward cooperative system with limited channel state information (CSI) feedback, where the PPS utilizes local CSI only for a subset of hops on each of all independent paths between a source and a destination to reduce the energy consumption for CSI feedback. To enhance the end-to-end performance of the PPS, we propose a novel PPS method with local CSI chosen by the correlation between the end-to-end signal-to-noise ratios (SNRs) based on global and local CSI under Nakagami- m fading channels. For each path, we pick a subset of hops to report CSI with the highest correlation for a given CSI feedback overhead requirement, which can achieve the similar end-to-end outage probability to the best path selection with global CSI. We provide an exact and closed-form expression for the SNR correlation coefficient and present an impact of the SNR correlation on the end-to-end outage probability.

Suggested Citation

  • In-Ho Lee & Haejoon Jung, 2018. "Energy-Efficient Path Selection Using SNR Correlation for Wireless Multi-Hop Cooperative Communications," Energies, MDPI, vol. 11(11), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3004-:d:179974
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