Abstract
The connected car concept is gaining momentum from the point of view, not only of research, but also of standardization and industrial development. Today there are many options for connecting a vehicle, in terms of to whom and how. In addition to making use of any conventional cellular technology, and connecting the vehicle to a base station or infrastructure element, vehicles can connect wirelessly and directly to each other using different technologies, both from the Institute of Electrical and Electronics Engineers (IEEE) and from the 3rd Generation Partnership Project (3GPP). This article offers a rigorous and detailed review of the system architecture aspects involved in the support of vehicular communications by the 3GPP fifth-generation (5G) standard, with special emphasis on its most recent iteration: Release 16.
Highlights
The advent of Vehicle-to-Everything (V2X) communication technologies has made possible new use cases aiming at improving the living standards for people around the world
V2X technical proposals strive for integrating disparate Quality of Service (QoS) requirements, and this, in turn, is inspiring new use cases that range from services based on vehicular communications to complex systems, for example, the self-driving car, which will need to be, undoubtedly, a connected car
It has been from standards completion to independent field testing to initial deployments in North America, Europe, China, Korea, Japan and Australia
Summary
The advent of Vehicle-to-Everything (V2X) communication technologies has made possible new use cases aiming at improving the living standards for people around the world. The EPS is the 3GPP’s 4G solution bringing together LTE (a mobile broadband, high-speed, low-latency, radio communication interface) with the System Architecture Evolution (SAE), a non-hierarchical, Internet Protocol (IP) data service-based, control/user plane traffic segregating architecture, whose key element is the Evolved Packet Core (EPC). This effort was aimed at the automotive use case verticals, and a working topic of the foremost importance. Rel-15 specified the service-based approach for the 5G Core Network (5GC), the support for data connectivity over NR and LTE access technologies, and functionalities for the enhancement of mobility, QoS, traffic steering, and network slicing. Summaries of key RAN enhancements to RAN Work Group (WG) 1/2/3/4 already existing standards are included in Section II-B5 of the present paper for Rel-14 and Rel-15, and in Section II-C6 for Rel-16
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