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http://dx.doi.org/10.7840/kics.2013.38A.5.451

Uplink Interference Avoidance Scheme to Improve Femtocell Performance in Heterogeneous Cellular Networks  

Kwon, Jung Hyoung (연세대학교 전기전자공학과 디지털통신 연구실)
Sang, Young Jin (연세대학교 전기전자공학과 디지털통신 연구실)
Kim, Kwang Soon (연세대학교 전기전자공학과 디지털통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38A, no.5, 2013 , pp. 451-458 More about this Journal
Abstract
This paper proposes a cross-tier interference avoidance scheme to improve femtocell performance in single frequency heterogeneous cellular networks (SFHCN). The scheduled macrocell users located close femtocell base stations cause serious interference to those femtocells so that the performance of femtocell is dramatically deteriorated. To solve this problem, this paper proposes an interference avoidance scheme by reversing the uplink and downlink frames of such femtocells. After reversing the uplink and downlink frames, femtocell base station relays the macrocell user data as well as transmitting its own data. In the 1st relaying link, femtocell and macrocell users transmit their data respectively divided uplink frames and in the 2nd relaying link, femtocell base station transmit macrocell and femtocell data using a simultaneously superposition coding scheme. Computer simulation results confirm performance improvement of proposed scheme.
Keywords
Femtocell; Uplink Interference Avoidance; Heterogeneous Cellular Networks;
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