Maglogiannis Vasilis, Naudts Dries, Shahid Adnan, Giannoulis Spilios, Laermans Eric, Moerman Ingrid
IDLab, Department of Information Technology, imec, Ghent University, Technologiepark Zwijnaarde 15, B-9052 Ghent, Belgium.
Sensors (Basel). 2017 Aug 31;17(9):1994. doi: 10.3390/s17091994.
On the road towards 5G, a proliferation of Heterogeneous Networks (HetNets) is expected. Sensor networks are of great importance in this new wireless era, as they allow interaction with the environment. Additionally, the establishment of the Internet of Things (IoT) has incredibly increased the number of interconnected devices and consequently the already massive wirelessly transmitted traffic. The exponential growth of wireless traffic is pushing the wireless community to investigate solutions that maximally exploit the available spectrum. Recently, 3rd Generation Partnership Project (3GPP) announced standards that permit the operation of Long Term Evolution (LTE) in the unlicensed spectrum in addition to the exclusive use of the licensed spectrum owned by a mobile operator. Alternatively, leading wireless technology developers examine standalone LTE operation in the unlicensed spectrum without any involvement of a mobile operator. In this article, we present a classification of different techniques that can be applied on co-located LTE and Wi-Fi networks. Up to today, Wi-Fi is the most widely-used wireless technology in the unlicensed spectrum. A review of the current state of the art further reveals the lack of cooperation schemes among co-located networks that can lead to more optimal usage of the available spectrum. This article fills this gap in the literature by conceptually describing different classes of cooperation between LTE and Wi-Fi. For each class, we provide a detailed presentation of possible cooperation techniques that can provide spectral efficiency in a fair manner.
在迈向5G的道路上，异构网络（HetNets）预计将会大量涌现。在这个新的无线时代，传感器网络至关重要，因为它们允许与环境进行交互。此外，物联网（IoT）的建立极大地增加了互联设备的数量，从而使原本就庞大的无线传输流量进一步增加。无线流量的指数级增长促使无线领域研究能够最大程度利用可用频谱的解决方案。最近，第三代合作伙伴计划（3GPP）宣布了相关标准，除了移动运营商独家使用的授权频谱外，还允许长期演进（LTE）在非授权频谱中运行。另外，领先的无线技术开发商正在研究在非授权频谱中独立运行LTE，而无需移动运营商的任何参与。在本文中，我们对可应用于共址LTE和Wi-Fi网络的不同技术进行了分类。到目前为止，Wi-Fi是在非授权频谱中使用最广泛的无线技术。对当前技术现状的回顾进一步揭示了共址网络之间缺乏合作方案，而这些方案可以实现对可用频谱的更优化利用。本文通过从概念上描述LTE和Wi-Fi之间不同类型的合作填补了文献中的这一空白。对于每种类型，我们详细介绍了能够以公平方式提供频谱效率的可能合作技术。
