Performance Trade-off in Relay Aided D2D-Cellular Networks

Rui Zhang, Yongzhao Li, Cheng-Xiang Wang, Yuhan Ruan, Hailin Zhang

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Abstract

With the explosive growth of multitudinous wireless services and high-data-rate required applications, relay aided Device-to-Device (D2D) communications have attracted increasing attentions. In this paper, we investigate the performance trade-off in relay aided D2D-cellular networks, where D2D users reuse the resource of cellular uplink transmissions. To optimize the performance of relay aided D2D communications, we firstly study the trade-off between spectral efficiency (SE) and energy efficiency, and propose a source-relay joint power allocation scheme. The optimal transmit powers for both source and relay users are derived, based on which we further introduce a SE-variation function to explicitly evaluate the impact of enabling D2D communications on D2D-cellular networks. Theoretical analysis and simulation results demonstrate the viability of the proposed scheme and provide comprehensive insights into the coexistence of different systems.

Original languageEnglish
JournalIEEE Transactions on Vehicular Technology
Early online date16 Jul 2018
DOIs
Publication statusE-pub ahead of print - 16 Jul 2018

Keywords

  • Device-to-Device communications
  • energy efficiency
  • interference constraint
  • power allocation
  • spectral efficiency

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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