Towards 6G Architecture: Key Concepts, Challenges, and Building Blocks (May 2025)

This white paper has been prepared by the 6G Architecture working group of the Smart Network and Services Joint Undertaking (SNS JU). It presents a comprehensive snapshot of the current architectural considerations explored by the Smart Networks and Services Joint Undertaking (SNS-JU) projects. It discusses the rationale for novel architectural components, the ongoing design efforts, and the future outlook for 6G. It analyses the blueprint for next-generation mobile networks, building on past experiences while integrating cutting-edge advancements. The structure follows the IMT-2030 framework, categorizing insights into the key usage scenarios and overarching architectural aspects.