Power allocation strategies in energy harvesting wireless cooperative networks

Zhiguo Ding, Samir M. Perlaza, Inaki Esnaola, H. Vincent Poor

Research output: Contribution to journalArticle

430 Scopus citations

Abstract

In this paper, a wireless cooperative network is considered, in which multiple source-destination pairs communicate with each other via an energy harvesting relay. The focus of this paper is on the relay's strategies to distribute the harvested energy among the multiple users and their impact on the system performance. Specifically, a non-cooperative strategy that uses the energy harvested from the i-th source as the relay transmission power to the i-th destination is considered first, and asymptotic results show that its outage performance decays as \frac {log SNR}{SNR}. A faster decay rate, \frac{1}{SNR}, can be achieved by two centralized strategies proposed next, of which a water filling based one can achieve optimal performance with respect to several criteria, at the price of high complexity. An auction based power allocation scheme is also proposed to achieve a better tradeoff between system performance and complexity. Simulation results are provided to confirm the accuracy of the developed analytical results.

Original languageEnglish (US)
Article number6702854
Pages (from-to)846-860
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume13
Issue number2
DOIs
StatePublished - Feb 2014

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Keywords

  • Wireless power transfer
  • auctions
  • cooperative diversity
  • energy harvesting

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