On the energy efficiency of HARQ-IR protocols for wireless network-coded butterfly networks

Quoc-Tuan Vien, Brian G. Stewart, Jinho Choi, Huan X. Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

4 Citations (Scopus)


In this paper, we investigate the energy-delay tradeoff (EDT) of data transmissions in wireless butterfly networks consisting of two source nodes, a relay node and two destination nodes. Two network coding (NC) techniques, namely physical-layer NC (PLNC) and analog NC (ANC), are exploited to reduce the number of transmissions at the relay by half. Additionally, hybrid automatic repeat request with incremental redundancy (HARQ-IR) is applied to assure the reliability of data transmissions in wireless network-coded butterfly networks (WNCBNs). By deriving the EDT of both PLNC and ANC schemes in WNCBNs, we evaluate not only their energy efficiency, but also the effectiveness of the relay positions in WNCBNs. It is found that the PLNC scheme is more energy efficient than both the ANC and direct transmission (DT) schemes when the relay is located either at the centre or close to the destinations. In addition, it is shown that both the PLNC and ANC schemes are shown to be less energy efficient than the DT scheme when the relay is located near the sources. © 2013 IEEE.
Original languageEnglish
Title of host publication2013 IEEE Wireless Communications and Networking Conference Proceedings
Place of PublicationPiscataway
Number of pages6
ISBN (Print)9781467359382
Publication statusPublished - 2013
Event2013 IEEE Wireless Communications and Networking Conference - Shanghai, China
Duration: 7 Apr 201310 Apr 2013


Conference2013 IEEE Wireless Communications and Networking Conference
Abbreviated titleWCNC 2013
Internet address


  • butterfly networks
  • destination nodes
  • energy efficient
  • energy-delay tradeoffs
  • hybrid automatic repeat request
  • incremental redundancy
  • number of transmissions
  • relay position
  • redundancy
  • wireless networks
  • wireless telecommunication systems
  • error correction

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