Network coding-based block acknowledgement scheme for wireless regenerative relay networks

Q.-T. Vien, H. X. Nguyen, J. Choi, B. G. Stewart, H. Tianfield

Research output: Contribution to journalArticle

2 Citations (Scopus)


This paper is concerned with block acknowledgement (ACK) mechanisms in wireless regenerative relay networks. In an N-relay network, a total of (2N + 1) block ACK packets is required to acknowledge the data transmission between source and destination nodes via the N-relay nodes. In this paper, the authors propose a block ACK scheme based on network coding (NC) to significantly reduce the ACK overheads by N block ACK packets. In addition, this achieves a reduction of N(N-1) computational operators. Particularly, we derive the error probability of the determination of the packets to be retransmitted at the source and relays, which shows that the NC-based scheme also improves the reliability of block ACK transmissions. Furthermore, asymptotic signal-to-noise (SNR) scenarios for forward links are considered and a general expression of error probability in multi-relay networks is derived for each SNR scenario. Finally, simulation results are presented to verify the analytical findings and demonstrate a lower number of data retransmissions for a higher system throughput. © The Institution of Engineering and Technology 2012.
Original languageEnglish
Pages (from-to)2593-2601
Number of pages9
JournalIET Communications
Issue number16
Publication statusPublished - 7 Jan 2013


  • wireless regenerative relay networks
  • N-relay
  • block ACK scheme
  • block acknowledgement (ACK)
  • telecommunication network reliability

Cite this