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The proliferation of connected vehicles along with the high demand for richmultimedia services constitute key challenges for the emerging 5G-enabledvehicular networks. These challenges include, but are not limited to, highspectral efficiency and low latency requirements. Recently, the integration ofcache-enabled networks with non-orthogonal multiple access (NOMA) has beenshown to reduce the content delivery time and traffic congestion in wirelessnetworks. Ac-cordingly, in this article, we envisage cache-aided NOMA as atechnology facilitator for 5G-enabled vehicular networks. In particular, wepresent a cache-aided NOMA architecture, which can address some of theaforementioned challenges in these networks. We demonstrate that the spectralefficiency gain of the proposed architecture, which depends largely on thecached contents, significantly outperforms that of conventional vehicularnetworks. Finally, we provide deep insights into the challenges, opportunities,and future research trends that will enable the practical realization ofcache-aided NOMA in 5G-enabled vehicular networks.

Non-Orthogonal Multiple Access with Wireless Caching for 5G-Enabled Vehicular Networks