Cooperative buffer-aided relaying using full-duplex relays with flow control

Yuhyun Shin, Seung Jun Baek

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this paper, we investigate buffer-aided cooperative relaying schemes using full-duplex (FD) relay nodes with flow control. We show that incorporating various transmission options combined with proper successive interference cancellation can better exploit the opportunism of fading channels, leading to improved achievable rates. We analytically derive the optimal policy for node selection and link scheduling. To deal with the delay incurred at relay nodes, we propose flow control using a threshold-based policy on relays' queues. For performance analysis, we develop a novel technique to derive a delay estimate of the controlled queues with general arrival and service statistics. Numerical results show that the proposed scheme achieves higher throughputs than conventional relaying schemes without FD relaying, and that the proposed estimate closely approximates the actual delay. For the delay-constrained case, our scheme is shown to achieve an improved tradeoff between throughput and delay.

Original languageEnglish
Article number8576607
Pages (from-to)1804-1838
Number of pages35
JournalIEEE Transactions on Vehicular Technology
Issue number2
Publication statusPublished - 2019 Feb

Bibliographical note

Funding Information:
Manuscript received July 8, 2018; revised November 1, 2018; accepted November 30, 2018. Date of publication December 14, 2018; date of current version February 12, 2019. This work was supported by the National Research Foundation of Korea under Grant 2018R1A2B6007130, funded by the Korea Government (Ministry of Science and ICT and Future Planning). The review of this paper was coordinated by Dr. J.-C. Chen. (Corresponding author: Seung Jun Baek.) The authors are with the Department of Computer and Communications Engineering, Korea University, Seoul 130-720, South Korea (e-mail:,; Digital Object Identifier 10.1109/TVT.2018.2886753

Publisher Copyright:
© 1967-2012 IEEE.


  • Cooperative relaying
  • diffusion approximation
  • flow control
  • scheduling
  • successive interference cancellation

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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