TY - GEN
T1 - Spectrum allocation with beamforming antenna in heterogeneous overlaying networks
AU - Ryoo, Sunheui
AU - Joo, Changhee
AU - Bahk, Saewoong
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - Beamforming antenna
KW - Cross-tier interference
KW - Femtocell
KW - Spectrum allocation
UR - http://www.scopus.com/inward/record.url?scp=78751496151&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2010.5672060
DO - 10.1109/PIMRC.2010.5672060
M3 - Conference contribution
AN - SCOPUS:78751496151
SN - 9781424480166
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 1150
EP - 1155
BT - 2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
T2 - 2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
Y2 - 26 September 2010 through 30 September 2010
ER -