Analytical evaluation of higher order sectorization, frequency reuse, and user classification methods in OFDMA networks


Higher order sectorization (HOS), which splits macrocells into a larger number of smaller sectors, are receiving significant interest as a cost-effective means of improving network capacity. Potentially, the capacity gain with HOS is proportionally linear to the number of sectors per cell due to spatial reuse, but factors such as non-ideal antenna radiation patterns together with inter-cell interference can significantly reduce this capacity gain. We develop a statistical model to theoretically characterize the performance of HOS deployments in wireless networks using orthogonal frequency division multiple access. Moreover, a fractional frequency reuse scheme is considered, which aids to mitigate inter-cell interference. The model provides a fast and effective tool for studying network performance in terms of user signal quality, site throughput, and outage probability, and it can be used to speed up network planning and optimization. In addition, we consider the impact of user classification methods in the analysis, and propose a new spectrum efficiency-based user classification method that improves resource utilization and allocation fairness. Performance results indicate that the proposed model is accurate, and shows a diminishing performance gain of HOS deployments with the number of sectors. The proposed user classification method improves network performances with respect to the state-of-the-art approaches.

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Divisions: College of Engineering & Physical Sciences > Adaptive communications networks research group
College of Engineering & Physical Sciences
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Uncontrolled Keywords: OFDMA,cellular network,LTE networks,higher order sectorization,fractional frequency reuse
Publication ISSN: 1558-2248
Last Modified: 17 Jun 2024 07:23
Date Deposited: 20 Jan 2017 08:04
PURE Output Type: Article
Published Date: 2016-12
Published Online Date: 2016-09-26
Accepted Date: 2016-09-13
Submitted Date: 2016-05-09
Authors: He, Jianhua (ORCID Profile 0000-0002-5738-8507)
Cheng, Wenqing
Tang, Zuoyin (ORCID Profile 0000-0001-7094-999X)
López-Pérez, David
Claussen, Holger



Version: Accepted Version

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