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This paper presents a novel user plane framework, tailored for different 5G services with diverse and conflicting key performance indicators. Initially, this paper identifies the major challenges in the legacy user-plane approaches and highlights the up-to-date 5G standardization activities in this area. It further analyzes new functional requirements related to service-oriented design and the introduction of new mechanisms to address them. Subsequently, this paper discusses how various user plane design decisions related to the control/user plane split options, network slicing, and radio access network (RAN)core network (CN) interfacing can potentially impact the overall 5G architecture. For the latter, some key RAN/CN interface considerations and the interactions with CN given different protocols and quality of service models are investigated.

Service-Tailored User-Plane Design Framework and Architecture Considerations in 5G Radio Access Networks