Impact of Femtocell Deployment on Existing Macrocells

Seokhyun YOON  Joonyoung CHO  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.5   pp.1730-1737
Publication Date: 2012/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1730
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
femtocell,  interference,  coordination,  power control,  

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The impact of co-channel deployment of femtocells on existing macro-cellular systems is investigated considering the use of techniques to resolve the loud neighbor problem. There are several approaches to this aim, for example, femtocell power control, interference coordination, and opening access to femtocells. Of these, coordinated scheduling, including power control, and their impact will be the main focus of this work. In the context of 3GPP-LTE, we examine under various operational scenarios the performance in terms of the average and 5% worst user throughput, a useful measure of fairness among users, both for femto and macro cells. Although recent studies have shown that co-channel femtocell has a minor impact on the macrocell performance in average sense, a non-negligible percentage of users may lose their opportunity to get satisfactory data service and, hence, we focus more on the 5% worst users.