Journal
IEEE WIRELESS COMMUNICATIONS
Volume 26, Issue 3, Pages 132-139Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MWC.2018.1800259
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Funding
- National Natural Science Foundation of China [61571100, 61631005, 61628103, 61801101]
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The Internet of Things (IoT) is a promising paradigm to accommodate massive device connections in 5G and beyond. To pave the way for future IoT, spectrum should be planned in advance. Spectrum sharing is a preferable solution for IoT due to the scarcity of available spectrum resources. In particular, mobile operators are inclined to exploit the existing standards and infrastructures of current cellular networks and deploy IoT within licensed cellular spectrum. However, proprietary companies prefer to deploy IoT within unlicensed spectrum to avoid any license fee. In this article, we provide a survey of prevalent IoT technologies deployed within licensed cellular spectrum and unlicensed spectrum. Emphasis will be on spectrum sharing solutions, including shared spectrum, interference model, and interference management. To this end, we discuss both advantages and disadvantages of different IoT technologies. Finally, we identify challenges for future IoT and suggest potential research directions.
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