Adaptive harvest-then-cooperate: Delay-aware wireless powered communication networks

Qizhong Yao, Aiping Huang, Hangguan Shan, Tony Q.S. Quek, Wei Wang

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

7 Citations (Scopus)

Abstract

In this paper, we consider a network where an access point (AP) wirelessly transfers energy to user equipments (UEs) and UEs use the harvested energy to communicate with the AP. Due to different radio propagation losses, the UEs far from the AP harvest little but consume much, thus suffering high transmission delay, while the UEs close to the AP has redundant energy. To reduce the average delay, we propose an adaptive harvest-then-cooperate (AHC) protocol, where every UE sends data to the AP directly or via other UEs acting as relays in a time-division multiplexing manner. Based on the load and energy distributions, the AP controls the transmit power and routing topology to minimize the average delay. To avoid data overflow in UE relays, we propose a method generating scheduling schemes given the transmit power and the routing topology. The average delay minimization is approximately modeled as a Markov decision process, and a policy iteration algorithm is employed to obtain the optimal combination of the power and the routing. Simulation results demonstrate the effectiveness of the AHC protocol in the delay minimization and reveal that the protocol can relieve the unbalance of the energy distribution.

Original languageEnglish
Title of host publicationSPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509017492
DOIs
Publication statusPublished - 2016 Aug 9
Event17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016 - Edinburgh, United Kingdom
Duration: 2016 Jul 32016 Jul 6

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Volume2016-August

Conference

Conference17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016
Country/TerritoryUnited Kingdom
CityEdinburgh
Period16-07-0316-07-06

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

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