, X., Zhang, X., Zhang, L. et al. (2019). PAPR reduction using iterative clip- ping/filtering and ADMM approaches for OFDM-based mixed-numerology sys- items. IEEE Transactions on Wireless Communications. 19 (4): 2586-2600. doi: https://doi.org/10.1109/TWC.2020.2966600 39 Liu, X., Zhang, L., Xiong, J. et al. (2019). Peak-to-average power ratio analysis for OFDM-based mixed-numerology transmissions. IEEE Transactions on Vehicular Tech- nology 1-1. doi: https://doi.org/10.1109/TVT.2019.2960801. 40 3GPP (2018). NR; Physical Layer; General Description. Technical Specification 38.201, ver. 15.0.0. 41 Levanen, T., Tervo, O., Pajukoski, K. et al. (2019). Mobile communications beyond 52.6 GHz: waveforms, numerology, and phase noise challenge, https://arxiv.org/abs/ 1912.09072. 42 Memisoglu, E., Kihero, A.B., and Arslan, H. (2020). Guard band reduction for 5G and beyond multiple numerologies. IEEE Communications Letters. 24 (3): 646-647. doi: https://doi.org/10.1109/LCOMM.2019.2963311. 43 Levanen, T., Pirskanen, J., Pajukoski, K. et al. (2019). Transparent Tx and Rx waveform processing for 5G new radio mobile communications. IEEE Wireless Communications 26 (1): 128-136. doi: https://doi.org/10.1109/MWC.2018.1800015. Network Slicing with Spectrum Sharing Yue Liu, Xu Yang and Laurie Cuthbert School of Applied Sciences, Macao Polytechnic Institute, Macao SAR, China The Need for Spectrum Sharing Unlike fixed networks where resources can be easily expanded by installing more fibers, wireless networks are limited to a fixed amount of spectrum that is allocated to them. Blocks of spectrum are allocated to types of service by the International Telecommunication Union Radio Communication Sector (ITU-R) and those blocks are allocated, or subdivided and allocated, by national regulators. An example of the allocation (for the UK) is given in Ofcom [1]. Ofcom (Office of Communications) is the UK communications regulator and (under the Wireless Telegraphy Act 2006 and the Communications Act 2003) has the statu- tory responsibility for a