Chu, X., Wu, Y., Lopez-Perez, D. et al. (1 more author) (2011) On providing downlink services in collocated spectrum-sharing macro and femto networks. IEEE Transactions on Wireless Communications, 10 (12). 4306 - 4315. ISSN 1536-1276
Abstract
Femtocells have been considered by the wireless industry as a cost-effective solution not only to improve indoor service providing, but also to unload traffic from already overburdened macro networks. Due to spectrum availability and network infrastructure considerations, a macro network may have to share spectrum with overlaid femtocells. In spectrum-sharing macro and femto networks, inter-cell interference caused by different transmission powers of macrocell base stations (MBSs) and femtocell access points (FAPs), in conjunction with potentially densely deployed femtocells, may create dead spots where reliable services cannot be guaranteed to either macro or femto users. In this paper, based on a thorough analysis of downlink (DL) outage probabilities (OPs) of collocated spectrum-sharing orthogonal frequency division multiple access (OFDMA) based macro and femto networks, we devise a decentralized strategy for an FAP to self-regulate its transmission power level and usage of radio resources depending on its distance from the closest MBS. Simulation results show that the derived closed-form lower bounds of DL OPs are tight, and the proposed decentralized femtocell self-regulation strategy is able to guarantee reliable DL services in targeted macro and femto service areas while providing superior spatial reuse, for even a large number of spectrum-sharing femtocells deployed per cell site.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Downlink; femtocell; macrocell; OFDMA; outage probability; spectrum-sharing |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 17 Jun 2014 11:30 |
Last Modified: | 17 Jun 2014 11:37 |
Published Version: | http://dx.doi.org/10.1109/TWC.2011.101511.110237 |
Status: | Published |
Publisher: | IEEE |
Refereed: | Yes |
Identification Number: | 10.1109/TWC.2011.101511.110237 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:77303 |
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Filename: TW_Feb_11_0237.pdf
