Energy efficient reliable data collection in wireless sensor networks with asymmetric links

Ren P. Liu, Zvi Rosberg, Iain B. Collings, Carol Wilson, Alex Y. Dong, Sanjay Jha

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Field measurements reveal that radio link asymmetry has a severe impact on reliable data delivery. We analyze the energy efficiencies of selected reliability schemes for asymmetric radio links using theoretical models. The analysis provides guidelines for retransmission control so as to balance between reliability and energy consumption. We also design two enhancements to the "implicit" ARQ scheme addressing the negative effects of asymmetric radio links. The energy efficiencies of these algorithms are explicitly derived using our theoretical model and validated by simulations and field trials. Based on the analysis of the two enhanced algorithms, we propose an improvement, referred to as Energy Efficient Reliable Data Collection (EERDC) that controls the retransmissions of the enhanced ARQ schemes. Simulations and field trials confirm our theoretical findings and demonstrate that our proposed EERDC algorithm alleviates the impact of link asymmetry and achieves energy savings.

Original languageEnglish
Pages (from-to)131-141
Number of pages11
JournalInternational Journal of Wireless Information Networks
Issue number3
StatePublished - 1 Sep 2009
Externally publishedYes


  • Energy efficiency
  • Implicit ARQ
  • Radio link asymmetry
  • Reliability
  • Wireless sensor networks

ASJC Scopus subject areas

  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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