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Cell Selection and Resource Allocation for Interference Management in a Macro-Picocell Heterogeneous Network

Title
Cell Selection and Resource Allocation for Interference Management in a Macro-Picocell Heterogeneous Network
Authors
Moon S.Kim B.Malik S.You C.Liu H.Kim J.-H.Kim J.Hwang I.
Ewha Authors
김정호
SCOPUS Author ID
김정호scopus
Issue Date
2015
Journal Title
Wireless Personal Communications
ISSN
0929-6212JCR Link
Citation
vol. 83, no. 3, pp. 1887 - 1901
Keywords
ABSCell selectionCREHetNetInterferenceSFRSINR
Publisher
Kluwer Academic Publishers
Indexed
SCIE; SCOPUS WOS scopus
Abstract
A heterogeneous network (HetNet) based on the long-term evolution advanced standard has been developed to improve the system performance; in this HetNet, macrocells and low-power nodes, such as picocells, coexist. Further, cell range expansion has been introduced to encourage data offloading in a HetNet. In this paper, we propose a cell selection scheme based on the signal-to-interference-plus-noise ratio to achieve an optimal offloading effect. We also propose a resource allocation scheme in the frequency and time domains, to reduce interference in a HetNet. In the frequency domain, the macrocells allocate a frequency band by using soft frequency reuse, and the picocells choose the sub-bands that are not used in the macrocell sector, to avoid interference. In addition, we found that it was difficult to allocate a limited frequency resource. Therefore, the cross-tier interference can be managed by using an almost blank subframe (ABS) with a flexible ABS ratio, to improve spectrum efficiency in the time domain. The simulation results show that the proposed schemes can improve the spectrum efficiency of both the macro-user equipment and the pico-user equipment, as well as improve the overall UE performance. © 2015, Springer Science+Business Media New York.
DOI
10.1007/s11277-015-2489-9
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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