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Open AccessArticle

Personal Picocell Scheme Using Adaptive Control CRE in Heterogeneous Mobile Networks

1
Graduate School of Engineering, Kogakuin University, Tokyo 163-8677, Japan
2
Department of Information and Communications Engineering, Kogakuin University, Tokyo 163-8677, Japan
*
Author to whom correspondence should be addressed.
This paper is an extended version of a paper published in International Conference on 90th Vehicular Technology Conference (VTC2019-Fall), entitled “Personal-Cell Scheme Using Adaptive Control CRE for Multicarrier HetNets”, ISBN 978-1-7281-1220-6, doi:10.1109/VTCFall.2019.8891193, published by IEEE.
J. Sens. Actuator Netw. 2020, 9(4), 48; https://doi.org/10.3390/jsan9040048
Received: 17 August 2020 / Revised: 5 October 2020 / Accepted: 10 October 2020 / Published: 14 October 2020
(This article belongs to the Special Issue 5G and Beyond towards Enhancing Our Future)
Heterogeneous networks (HetNets), which are combined with a macrocell and picocell in the same coverage, are expected to further increase the system capacity in fifth-generation mobile systems and beyond. In HetNets, the cell range expansion (CRE) technique plays an important role and can allow more user equipment (UE) to access the picocell, i.e., virtually expand the picocell coverage. However, conventional CRE techniques that provide a fixed cell selection offset (CSO) for all UE may worsen user throughput if UE is forced to connect to the picocell because the received signal-to-interference plus noise ratio of the UE becomes lower. Therefore, we propose a personal picocell scheme using an adaptive control CRE technique to improve user throughput in which different CSOs are assigned to UE to form each optimal picocell for each UE. In this paper, we first describe the aspects and algorithm of the proposed scheme. Then, we show the user throughput for adaptive control CRE in comparison with conventional CRE by using system-level computer simulations for the two types of HetNets, i.e., single-band and multi-band HetNets. In the simulations, we first clarify the optimal parameters of the adaptive control CRE. We then show the average and 5-percentile user throughput of the optimized adaptive control CRE in comparison with that of conventional CRE. From these results, we confirmed that the personal picocell scheme using the adaptive control CRE can improve the 5-percentile user throughput while maintaining the average user throughput compared with that of conventional CRE. View Full-Text
Keywords: mobile communication; heterogeneous networks; cell range expansion; cell selection offset; personal picocell scheme; user throughput mobile communication; heterogeneous networks; cell range expansion; cell selection offset; personal picocell scheme; user throughput
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Fujisawa, K.; Kemmochi, F.; Otsuka, H. Personal Picocell Scheme Using Adaptive Control CRE in Heterogeneous Mobile Networks. J. Sens. Actuator Netw. 2020, 9, 48.

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