nlicensed spectrum (Release 13), June 2015. [10] 3GPP TS 38.300, NR; NR and NG-RAN overall description, Stage 2 (Release 15), June 2018. [11] 3GPP TS 38.323, NR; Packet data convergence protocol (PDCP) specification (Release 15), June 2018. [12] 3GPP TR 38.889, Study on NR-based access to unlicensed spectrum (Release 15), December 2018. Articles, Books, White Papers, and Application Notes [13] B. Ren, et al., Cellular communications on license-exempt spectrum, IEEE Communications Magazine, May 2016. [14] Keysight Technologies Application Note, 4G LTE-A in Unlicensed Band - Use Cases and Test Implications, December 2017. [15] J. Zhang, et al., LTE on license-exempt spectrum, IEEE Commun. Surveys Tutor. 20 (1) (First Quarter 2018). M. Labib, et al., Extending LTE into the unlicensed spectrum: technical analysis of the proposed variants, IEEE Communications Standards Magazine, December 2017. A. Mukherjee, et al., Licensed-assisted access LTE: co-existence with IEEE 802.11 and the evolution toward 5G, IEEE Communications Magazine, June 2016. [18] Netmanias Report, Analysis of LTE - Wi-Fi Aggregation Solutions, NMC Consulting Group, March 2016. [19] K. Mun, CBRS: new shared spectrum enables flexible indoor and outdoor mobile solutions and new busi- ness models, Mobile Experts CBRS White Paper, March 2017. A. Savoia, LTE in the unlicensed spectrum, Keysight Technologies, March 2016. H.-J. Kwon, et al., Licensed-assisted access to unlicensed spectrum in LTE Release 13. IEEE Communications Magazine, February 2017. [22] Rohde & Schwarz White Paper, LTE-Advanced Pro Introduction, eMBB Technology Components in 3GPP Release 13/14, May 2018. R. Karaki, et al., Uplink performance of enhanced licensed assisted access (eLAA) in unlicensed spec- trum, in: IEEE Wireless Communications and Networking Conference (WCNC), 2017. [24] B. Chen, et al., Co-existence of LTE-based LAA and Wi-Fi on 5GHz with corresponding deployment sce- narios: a survey, IEEE Commun. Surveys Tutor. 19 (1) (First Quarter 2017). 3GPP specifications can be acc