Spectrum allocation with beamforming antenna in heterogeneous overlaying networks

Sunheui Ryoo, Changhee Joo, Saewoong Bahk

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

4 Citations (Scopus)

Abstract

Two-tier overlay networks that consist of a conventional macrocell network and femtocell hotspots offer an economical solution for high user capacity and extended coverage. However, wireless interference across tiers causes significant performance degradation and restricts spectrum reuse. In this paper, we explore schemes to mitigate cross-tier interference with beamforming antennas for overlay networks. In our model, femtocells can operate with frequency spectrum that is either shared with or separated from the macrocell. The enhanced SIR from beamforming contributes to the population of femtocells with the shared spectrum, and thus improve the spectrum efficiency. Given a required SIR level, we show that which femtocells can use the shared spectrum and how much spectrum can be shared to maximize total utility.We show through a numerical performance evaluation that proposed schemes improve spectrum utilization for two-tier overlay networks.

Original languageEnglish
Title of host publication2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
Pages1150-1155
Number of pages6
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 - Istanbul, Turkey
Duration: 2010 Sep 262010 Sep 30

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
Country/TerritoryTurkey
CityIstanbul
Period10/9/2610/9/30

Keywords

  • Beamforming antenna
  • Cross-tier interference
  • Femtocell
  • Spectrum allocation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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