This document focuses on describing and analysing the use cases that will demonstrate and validate the technologies to be tested in the PREDICT-6G project and establish the system requirements necessary to achieve the project's goals. Each use case will be described, outlining the targets and KPIs, and analysing the technical components and systems, based on a common definition of the Key Performance Indicators (KPIs) that will be used to analyse and evaluate the technologies used in the project and a standard methodology to compare the uses case, which are described in this document. Taking this in account, a traffic characterization and the system requirements for the projects are also define in this document, as well as, an initial explanation of the architectural and security requirements.