5G COMMUNICATIONS RACE
5G COMMUNICATIONS RACE
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DOI：
10.1109/mvt.2014.2380631
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发表时间：
2015-03-01
影响因子：
8.1
通讯作者：
Sousa, Elvino
中科院分区：
文献类型：
--
作者：
Al-Dulaimi, Anwer;Al-Rubaye, Saba;Sousa, Elvino
第五代（5G）网络开发人员需要确定对额外容量和频谱效率无线技术的必要要求。因此，Wi-Fi频带中大量未充分利用的频谱促使运营商将联合收割机长期演进（LTE）与Wi-Fi技术相结合。这种新的非授权频带中的LTE（LTE-U）具有物理层拓扑以接入Wi-Fi频谱，特别是5-GHz频带。然而，LTE-U的演进影响Wi-Fi操作，这是由于在未授权频带中LTE-U传输缺乏任何规律性。在本文中，我们将解决Wi-Fi在LTE-U保护伞下保持传输的挑战，因为Wi-Fi由于通话前监听（LBT）功能而被离线。因此，我们推导出一种新的自适应LBT机制和虚拟化核心网络，用于Wi-Fi和LTE-U技术的最佳实践。所提出的解决方案包括非协调和协调的网络管理，以使用公平频谱共享的折衷性能来实现两种技术之间的共存。我们将集中讨论最初的共存技术，并讨论它如何映射到更高层的改进。本文展示了实现第三代合作伙伴计划（3GPP）版本13的新方法。
Fifth-generation (5G) network developers need to identify the necessary requirements toward additional capacity and spectrally efficient wireless technologies. Therefore, the significant amount of underutilized spectrum in the Wi-Fi band is motivating operators to combine long-term evolution (LTE) with Wi-Fi technologies. This new LTE in unlicensed band (LTE-U) has the physical layer topology to access Wi-Fi spectrum, specifically the 5-GHz band. Nevertheless, the evolution of LTE-U affects the Wi-Fi operations due to the absence of any regularity for LTE-U transmissions in unlicensed band. In this article, we address the challenges for Wi-Fi to maintain transmissions under the umbrella of LTE-U as Wi-Fi is pushed offline because of the listen-before-talk (LBT) feature. Therefore, we derive a new adaptive LBT mechanism and and virtualized core network for the best practices in both Wi-Fi and LTE-U technologies. The proposed solutions include noncoordinated and coordinated network managements to enable coexistence between both technologies using tradeoff performance for fair spectrum sharing. We concentrate on the initial coexistent technique and discuss how it maps to higher-layer improvements. This article shows new approaches to achieve the Third-Generation Partnership Project (3GPP) Release 13.