NDLI: Spectrum allocation and optimization in femtocell networks

Content Provider	IEEE Xplore Digital Library
Author	Wang Chi Cheung Quek, T.Q.S. Kountouris, M.
Copyright Year	2012
Description	Author affiliation: Institute for Infocomm Research, A∗STAR, 1 Fusionopolis Way, #21-01 Connexis, Singapore 138632 (Quek, T.Q.S.) \|\| SUPELEC, 3 rue Joliot-Curie, 91192 Gif-sur-Yvette, France (Kountouris, M.) \|\| Operations Research Center, MIT, 77 Massachusetts Ave, E40-140, Massachusetts, U.S.A. (Wang Chi Cheung)
Abstract	Two-tier femtocell networks have been shown to provide superior performance in terms of indoor user coverage and data rate as compared to conventional macrocellular networks. Nevertheless, when macrocells and femtocells share the whole spectrum, macrocellular communication links suffer severely from inter-tier interference, further exacerbated in dense femtocell network deployments. Therefore, it is of interest to investigate optimal subchannel allocation strategies and characterize their dependence on network density in two-tier femtocell networks. In this paper, we consider a joint subchannel scheme, in which the whole spectrum is shared by both tiers, as well as a disjoint subchannel scheme, whereby disjoint sets of subchannels are assigned to each tier. We derive analytical expressions for the performance of different spectrum allocation schemes in terms of success probability and per-tier network throughput. Furthermore, we formulate the aggregate network throughput maximization problem subject to quality of service constraints in terms of success probabilities and per-tier minimum rate, and provide practically relevant solutions and insights on the optimal spectrum allocation scheme. Our results indicate that with closed access femtocells, the optimized joint and disjoint subchannel schemes provide the highest throughput among all schemes in sparse and dense femtocell network, respectively.
Starting Page	2473
Ending Page	2478
File Size	331120
Page Count	6
File Format	PDF
ISBN	9781457720529
ISSN	15503607
e-ISBN	9781457720536
e-ISBN	9781457720512
DOI	10.1109/ICC.2012.6363800
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput Resource management Macrocell networks Interference Joints Optimization Femtocell networks
Content Type	Text
Resource Type	Article

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