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http://dx.doi.org/10.7840/kics.2012.37A.9.762

An Adaptive Control of Individual Channels' Transmission Power in Femtocells  

Lee, Hoseog (삼성전자 소프트웨어센터 Convergence Solution팀 Cloud Computing 연구실)
Cho, Ho-Shin (경북대학교 IT대학 전자공학부 이동통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37A, no.9, 2012 , pp. 762-771 More about this Journal
Abstract
In this paper, we propose an adaptive power control scheme employing a self-optimization concept in femtocell systems, in order to improve system capacity, thereby reducing call-drop probability. In the proposed scheme, each femto base station(FBS) controls individual channel's transmission power base on two parameters; the neighboring cell's transmission power for each individual channel which is delivered from a femto-gateway and the received power strength from neighboring cells which is periodically measured by means of a spectrum sensing. Adaptive adjustment of individual channel's transmission power in accordance with femto mobile station(FMS) mobility features can also reduce undesirable handovers and evenly distribute traffic load over all femtocells. In addition, the manipulative control of channel's transmission power is able to keep the system coverage and the call-drop probability within an acceptable range, regardless of density of femtocells. Computer simulation shows that the proposed scheme outperforms existing schemes in terms of the system coverage and the call-drop probability.
Keywords
Femtocell; Interference; Power Control; Self-Organization;
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Times Cited By KSCI : 1  (Citation Analysis)
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