QoS-Constrained Relay Control for Full-Duplex Relaying with SWIPT

Hongwu Liu, Kyeong Jin Kim, Kyung Sup Kwak, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


This study investigates relay control for simultaneous wireless information and power transfer in full-duplex relay networks under Nakagami- m fading channels. Unlike previous work, harvest-transmit (HT) and general harvest-transmit-store (HTS) models are respectively considered to maximize average throughput subject to quality of service (QoS) constraints. The end-to-end outage probability of the network in an HT model is presented in an exact integral-form. To prevent outage performance degradation in an HT model, time switching (TS) is designed to maximize average throughput subject to QoS constraints of minimizing outage probability and maintaining a target outage probability, respectively. The optimal TS factors subject to QoS constraints are presented for an HT model. In general, in an HTS model, energy scheduling is performed across different transmission blocks and TS is performed within each block. Compared with the block-based HTS model without TS, the proposed general HTS model can greatly improve outage performance via greedy search (GS). By modeling the relay's energy levels as a Markov chain with a two-stage state transition, the outage probability for the GS implementation of the general HTS model is derived. To demonstrate the practical significance of QoS-constrained relay control, numerical results are presented showing that the proposed relay control achieves substantial improvement of outage performance and successful rate.

Original languageEnglish (US)
Article number7880678
Pages (from-to)2936-2949
Number of pages14
JournalIEEE Transactions on Wireless Communications
Issue number5
StatePublished - May 2017

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


  • Energy harvesting
  • amplify-and-forward relay
  • full-duplex relay
  • relay control
  • wireless power transfer


Dive into the research topics of 'QoS-Constrained Relay Control for Full-Duplex Relaying with SWIPT'. Together they form a unique fingerprint.

Cite this