On Systematic Identification of Requirements for Vehicle-to-Everything 5G Slices Eugen Borcoci, Marius Vochin, Serban Georgica Obreja University POLITEHNICA of Bucharest - UPB Bucharest, Romania Emails: eugen.borcoci@elcom.pub.ro, serban@radio.pub.ro, marius.vochin@elcom.pub.ro Abstract — Vehicle-to-Everything (V2X) and Internet of Vehicles and their services have been intensively studied and developed in the last decade. The V2X supports a large range of applications, such as safety oriented, vehicular traffic optimization, autonomous driving, infotainment and auxiliary operations in vehicular area. Various stakeholders/actors are playing roles in such a complex system, e.g., regulators, authorities, service or network providers, operators, manufacturers, tenants and end users. Therefore, to specify and design a specific V2X system, one should first identify the ecosystem actors and then derive in a structured way the system requirements, while harmonizing needs coming from different entities. The 5G slicing technology is seen as a strong candidate to support V2X, in multi-tenant, multi-domain, multi-operator and end-to-end contexts. The 5G slicing allows construction of dedicated slices, to meet particular V2X requirements. Given the large variety of environments and actors involved in a planned V2X system, the identification of the system requirements is a complex process that could benefit from a structured approach. This paper contributes to develop a methodology to perform a top-down systematic identification of requirements for a V2X system supported by 5G dedicated slices. Keywords — Vehicle-to-Everthing; V2X; 5G slicing; Ecosystem; Business model; Stakeholders; Requirements, Software Defined Networking; Network Function Virtualization; Service management. I. INTRODUCTION The Vehicle-to-Everything (V2X) communications and services include several types, where X can be: vehicle (V2V), road/infrastructure (V2R/V2I), pedestrian (V2P), vulnerable road user (VRU), network (V2N) - including cellular networks and Internet, sensors (V2S), power grid (V2G) and home (V2H) [1]. The V2X systems can be deployed in single or multi-tenancy, multi-operator and multi-domain contexts. V2X support a large range of services/applications: road safety (warnings, notifications, assistance); road traffic optimization and management; autonomous driving; infotainment. Recently, V2X has been extended to Internet of Vehicles (IoV) aiming to create a global network of vehicles – enabled by various Wireless Access Technologies (WAT) [1][2]. The V2X/IoV systems are complex, involving several technical and organizational entities which cooperate in a business ecosystem V2X-ES (or, equivalently, business model V2X-BM). The participating entities/actors can be organizations/ stakeholders such as technology suppliers, distributors, road authorities, customers/users, municipalities, regulators, vehicle manufacturers Original Equipment Manufacturers (OEM), government agencies, etc. The above entities interact with each other, in order to achieve together the general goals of the system. A large variety of use cases and deployments can exist, each one having different functional and performance–related requirements. Apart from general V2X requirements, a specific set should be identified and adapted to the particular V2X-ES selected (including the use cases targeted), and also to some technological solutions and constraints. Initially defined as LTE V2X in 3GPP Release 14, C-V2X has been defined as a platform for an evolution track that further enables enhancements in Releases 15, 16, etc. for LTE-Advanced Pro and for the 5G New Radio (NR) [3]-[5]. Advanced solutions - 5G [6]-[8] and especially the slicing technology (based on virtualization and softwarization) - can successfully support V2X. 5G can provide dedicated types of services to satisfy various (vertical) customer/tenant demands in a multi-x fashion (the notation –x stands for: tenant, domain, operator and provider) [9]-[12]. A Network Slice (NSL) is a virtual dedicated managed network, isolated from other slices (w.r.t. performance and security), but they share the same infrastructure. The functional components of a network slice are Physical/Virtual Network Functions (PNFs/VNFs). They are chained in graphs, in order to compose services dedicated to different sets of users. The slices are programmable and expose their capabilities to the users. The actual run-time entities are instantiated slices (NSLIs), whose life cycles are controlled by the management and control entities belonging to the Management, Orchestration and Control architectural Plane (MO&C). The Network Function Virtualization (NFV)[13-15] and Software Defined Networks (SDN) technologies can cooperate [16] to manage, orchestrate and control the 5G sliced environment. The 3GPP [7][8] has defined three fundamental categories of 5G slices: Massive machine type communication (mMTC); Ultra reliability low latency 5 Copyright (c) IARIA, 2020. ISBN: 978-1-61208-808-2 MOBILITY 2020 : The Tenth International Conference on Mobile Services, Resources, and Users