Feedback-based unequal error protection fountain code over device-to-device broadcast

Gai Shi Huang, Ze Song Fei*, Cong Zhe Cao, Cheng Wen Xing, Jing Ming Kuang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

To enhance encoding efficiency, an unequal error protection (UEP) broadcast scheme based on one additional feedback is proposed. Different from the equal probability selection for source packets in traditional fountain encoding, the proposed scheme calculates the packet loss ratio (PLR) according to the feedback results in systematic broadcast phase (SBP) and then optimizes the selection probability for source packets to guarantee higher level error protection for those source packets with larger PLRs. Thus the amount of unnecessarily redundant encoded packets during encoding broadcast phase (EBP) is decreased significantly. Numerical results show that the proposed scheme can recover 60% more packets than the traditional non-feedback broadcast scheme at the expense of tolerably only one feedback procedure.

Original languageEnglish
Pages (from-to)534-540
Number of pages7
JournalJournal of Beijing Institute of Technology (English Edition)
Volume23
Issue number4
Publication statusPublished - 1 Dec 2014

Keywords

  • Broadcast
  • Device to device (D2D)
  • Feedback
  • Fountain code
  • Unequal error protection (UEP)

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