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

He, Jianhua, Cheng, Wenqing, Tang, Zuoyin, López-Pérez, David and Claussen, Holger (2016). Analytical evaluation of higher order sectorization, frequency reuse, and user classification methods in OFDMA networks. IEEE Transactions on Wireless Communications, 15 (12), 8209 - 8222.

Abstract

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.

Publication DOI: https://doi.org/10.1109/TWC.2016.2613515
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Adaptive communications networks research group
Additional Information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: OFDMA,cellular network,LTE networks,higher order sectorization,fractional frequency reuse
Published Date: 2016-12
Authors: He, Jianhua ( 0000-0002-5738-8507)
Cheng, Wenqing
Tang, Zuoyin ( 0000-0001-7094-999X)
López-Pérez, David
Claussen, Holger

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