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Licensed-Assisted Access to Unlicensed Spectrum in LTE Release 13

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TLDR
An overview of the Release 13 LAA technology including motivation, use cases, LTE enhancements for enabling the unlicensed band operation, and the coexistence evaluation results contributed by 3GPP participants is provided.
Abstract
Exploiting the unlicensed spectrum is considered by 3GPP as one promising solution to meet ever-increasing traffic growth. As a result, one major enhancement for LTE in Release 13 has been to enable its operation in the unlicensed spectrum via licensed-assisted access (LAA). In this article, we provide an overview of the Release 13 LAA technology including motivation, use cases, LTE enhancements for enabling the unlicensed band operation, and the coexistence evaluation results contributed by 3GPP participants.

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Journal ArticleDOI

New Radio Beam-Based Access to Unlicensed Spectrum: Design Challenges and Solutions

TL;DR: In this article, the design challenges, opportunities, and solutions for New Radio-based access to Unlicensed spectrum (NR-U) by taking into account the beam-based transmissions and the worldwide regulatory requirements are discussed.
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NR-U and IEEE 802.11 Technologies Coexistence in Unlicensed mmWave Spectrum: Models and Evaluation

TL;DR: This paper reports on extensions to a popular and open source network simulator, ns-3, to build an NR-U system-level simulator and to model theNR-U and IEEE 802.11ad Wireless Gigabit in the 60 GHz bands, and focuses on determining whether NR- U fulfills its coexistence objective in terms of a fairness criterion.
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Recent Advances of LTE/WiFi Coexistence in Unlicensed Spectrum

TL;DR: Recent advances are presented by reviewing the state-of-the-art LTE/WiFi coexistence mechanisms and show how they are incorporated into industry standards and point out several key challenges and open problems for future research.
Journal ArticleDOI

Survey of Spectrum Sharing for Inter-Technology Coexistence

TL;DR: In this article, the authors present a literature review on inter-technology coexistence with a focus on wireless technologies with equal spectrum access rights, i.e., (i) primary/primary, (ii) secondary/secondary, and (iii) technologies operating in a spectrum commons.
Journal ArticleDOI

Standalone LTE in Unlicensed Spectrum: Radio Challenges, Solutions, and Performance of MulteFire

TL;DR: The main regulatory requirements in the 5 GHz unlicensed band are summarized, the needed modifications to the LTE specifications are described, and it is demonstrated by means of detailed system- level simulations how MulteFire can improve the system capacity and coverage, as compared to WiFi, in specific propagation environments and small cell deployments.
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