Power Allocation and Transmission Period Selection for Device-to-Device Communication as an Underlay to Cellular Networks

Donghoon Lee, Sung Il Kim, Jaeyoung Lee, Jun Heo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Efficient design of device-to-device (D2D) communication calls for D2D users to propose adaptive power allocation strategy and to establish reliable communication links while protecting the QoS of cellular communications. In this paper, we consider the D2D communication as an underlay to relay-assisted cellular networks. To maximize the ergodic capacity, we derive an optimal transmission power under an average power constraint. With the derived optimal transmission power, a transmission period selection strategy for D2D communication is firstly introduced to improve reliability. We derive the outage probability in closed forms and evaluate the ergodic capacity to show performances of the proposed system. Numerical results show that the D2D system can achieve high capacity gains by flexibly allocating transmission power based on channel state information and significantly enhance reliability by selecting a transmission period, while satisfying various QoS conditions for cellular communication.

Original languageEnglish
Pages (from-to)1-20
Number of pages20
JournalWireless Personal Communications
Volume79
Issue number1
DOIs
Publication statusPublished - 2014 Oct 22

Keywords

  • Device-to-device communication
  • Ergodic capacity
  • Outage probability
  • Power optimization
  • Transmission period selection

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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