Resource Allocation for Interference Avoidance in OFDMA-TDD Based Femtocell Networks

IlKwon CHO  Se-Jin KIM  Choong-Ho CHO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.5   pp.1886-1889
Publication Date: 2012/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1886
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
femtocell networks,  fractional frequency reuse,  OFDMA,  resource allocation,  interference avoidance,  

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Summary: 
In this letter, we propose a novel resource allocation scheme to enhance downlink system performance for orthogonal frequency division multiple access (OFDMA) and time division duplex (TDD) based femtocell networks. In the proposed scheme, the macro base station (mBS) and femto base stations (fBSs) service macro user equipments (mUEs) and femto user equipments (fUEs) in inner and outer zones in different periods to reduce interference substantially. Simulations show the proposed scheme outperforms femtocell networks with fractional frequency reuse (FFR) systems in terms of the system capacity and outage probability for mUEs and fUEs.