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A QoE-based cell range expansion scheme in heterogeneous cellular networks

一种用于异构网络中基于 QoE 的小区范围扩展算法

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Abstract

Deploying low-power nodes (LPNs) overlaid with Macro cells is a promising strategy to improve the coverage and capacity of cellular systems. Meanwhile, cell range expansion (CRE) scheme is proposed to select a proper serving base station (BS) for users between Macro eNodeBs and LPNs, and then offloading of traffic from Macro cell is made. In this paper, first, we introduce the LPNs deployment strategy and its activation criteria in the heterogeneous system. Then, a quality of experience (QoE)-based CRE scheme to adjust the coverage area of LPNs adaptively is proposed. Different from the existing CRE schemes, the QoE values for different users with different services are considered when the users try to select an appropriate serving BS. Finally, simulation results demonstrate that the proposed scheme can improve cell edge user experience for various services as well as overall system performance.

创新点

本文主要研究了LTE-Advanced系统异构网络中低功率节点的部署问题以及部署完成后小区选择算法的设计。小区范围扩展(CRE)方案提出的目的是将部分用户接入到邻近的低功率节点所在的小区, 从而降低宏小区的负载量。本文首先介绍了异构网络中低功率节点的部署和激活准则, 然后提出了一种基于用户体验质量的自适应CRE算法。该算法综合考虑了不同业务下的用户对功率以及用户体验质量的不同需求, 从用户需求角度出发, 设计了一种新的小区范围扩展算法。最后, 仿真结果验证了所提算法在用户体验质量和系统吞吐量两方面的性能要求, 说明了所提算法的可行性和有效性。

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Authors and Affiliations

  1. School of Information Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    TingTing Yuan, ZeSong Fei, NiWei Wang, ChengWen Xing & JiaKang Liu

  2. The Research Institution of China Mobile, Beijing, 100053, China

    Na Li

Authors
  1. TingTing Yuan
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  2. ZeSong Fei
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  3. Na Li
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  4. NiWei Wang
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  5. ChengWen Xing
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  6. JiaKang Liu
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Correspondence to ZeSong Fei.

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Yuan, T., Fei, Z., Li, N. et al. A QoE-based cell range expansion scheme in heterogeneous cellular networks. Sci. China Inf. Sci. 58, 1–11 (2015). https://doi.org/10.1007/s11432-015-5297-7

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