Interference mitigation using uplink power control for two-tier femtocell networks
Han-Shin Jo
Cheol Mun
June Moon
Jong-Gwan Yook
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea;
This paper appears in: Wireless Communications, IEEE Transactions on
Publication Date: October 2009
Volume: 8,
Issue: 10
On page(s): 4906-4910
ISSN: 1536-1276
INSPEC Accession Number: 10929052
Digital Object Identifier: 10.1109/TWC.2009.080457
Current Version Published: 2009-10-20
Abstract
This paper proposes two interference mitigation strategies that adjust the maximum transmit power of femtocell users to suppress the cross-tier interference at a macrocell base station (BS). The open-loop and the closed-loop control suppress the cross-tier interference less than a fixed threshold and an adaptive threshold based on the noise and interference (NI) level at the macrocell BS, respectively. Simulation results show that both schemes effectively compensate the uplink throughput degradation of the macrocell BS due to the cross-tier interference and that the closed-loop control provides better femtocell throughput than the open-loop control at a minimal cost of macrocell throughput.
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