Energy-Efficient Cooperative Tfor Simultaneous Wireless Information and Power Transfer in Clustered Wireless Sensor Networks

Songtao Guo, Fei Wang, Yuanyuan Yang, Bin Xiao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

87 Citations (Scopus)

Abstract

This paper considers applying simultaneous wireless information and power transfer (SWIPT) technique to cooperative clustered wireless sensor networks, where energy-constrained relay nodes harvest the ambient radio-frequency (RF) signal and use the harvested energy to forward the packets from sources to destinations. To this end, we first formulate the energy-efficient cooperative transmission (eCotrans) problem for SWIPT in clustered wireless sensor networks as a non-convex constrained optimization problem. Then, by exploiting fractional programming and dual decomposition, we develop a distributed iteration algorithm for power allocation, power splitting and relay selection to solve the non-convex optimization problem. We find that power splitting ratio plays an imperative role in relay selection. Our simulation results illustrate that the proposed algorithm can converge within a few iterations and the numerical analysis provides practical insights into the effect of various system parameters, such as the number of relay nodes, the inter-cluster distance and the maximum transmission power allowance, on energy efficiency and average harvested power.
Original languageEnglish
Article number7274335
Pages (from-to)4405-4417
Number of pages13
JournalIEEE Transactions on Communications
Volume63
Issue number11
DOIs
Publication statusPublished - 1 Nov 2015

Keywords

  • clustered wireless sensor networks
  • cooperative relaying
  • Power allocation
  • wireless information and power transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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