Power Adaptation in Buffer-Aided Full-Duplex Relay Networks with Statistical CSI

N. Nomikos, T. Charalambous, D. Vouyioukas, R. Wichman, G. K. Karagiannidis

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)
260 Downloads (Pure)


In networks with multiple wireless nodes and especially in fast changing environments, the continuous acquisition of Channel State Information (CSI) may become infeasible. In this paper, we study the relay selection problem for a cooperative network, where Full-Duplex (FD) relays are equipped with buffers and only statistical CSI is available at the transmitters (CSIT). For this setting, a novel relay selection algorithm is proposed, named HyQoS, relying only on statistical CSIT and performing power adaptation. HyQoS solves an optimization problem for selecting the optimal set of relays. We consider two optimization approaches: 1) minimization of the total power consumed in the network, and 2) maximization of the throughput per energy unit, while guaranteeing a specific Quality of Service (QoS), in terms of Successful Transmission Probability (STP). The power allocation problem is formulated as a nonlinear optimization one, taking into account inter-relay interference and residual loop interference. Numerical results show that HyQoS can reduce the power expenditure and increase the throughput, by using only statistical CSIT.
Original languageEnglish
Article number8360521
Pages (from-to)7846 - 7850
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Issue number8
Early online date2018
Publication statusPublished - Aug 2018
MoE publication typeA1 Journal article-refereed


  • High definition video
  • Interference
  • Optimization
  • Quality of service
  • Relays
  • Signal to noise ratio
  • Throughput
  • Full-duplex relaying
  • adaptive link selection
  • buffer-aided relays
  • power adaptation
  • statistical CSIT


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