Joint subcarrier assignment and power allocation in full-duplex OFDMA networks

Changwon Nam, Changhee Joo, Saewoong Bahk

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

Recent advances in the physical layer have demonstrated the feasibility of in-band wireless full-duplex which enables a node to transmit and receive simultaneously on the same frequency band. While the full-duplex operation can ideally double the spectral efficiency, the network-level gain of full-duplex in large-scale networks remains unclear due to the complicated resource allocation in multi-carrier and multi-user environments. In this paper, we consider a single-cell full-duplex OFDMA network which consists of one full-duplex base station (BS) and multiple full-duplex mobile nodes. Our goal is to maximize the sum-rate performance by jointly optimizing subcarrier assignment and power allocation considering the characteristics of full-duplex transmissions. We develop an iterative solution that achieves local Pareto optimality in typical scenarios. Through extensive simulations, we demonstrate that our solution empirically achieves near-optimal performance and outperforms other resource allocation schemes designed for half-duplex networks. Also, we reveal the impact of various factors such as the channel correlation, the residual self-interference, and the distance between the BS and nodes on the full-duplex gain.

Original languageEnglish
Article number7036057
Pages (from-to)3108-3119
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number6
DOIs
Publication statusPublished - 2015 Jun 1
Externally publishedYes

Keywords

  • Full-duplex communications
  • OFDMA
  • wireless resource allocation

ASJC Scopus subject areas

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

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