Unified Access and Control RAN for 6G: Motivation, Concept, Solution and Key Technologies

Network architecture plays a critical role in achieving the objectives of IMT-2030 and beyond. RAN serves as the foundation for diverse capabilities of 6G. This paper analyzes the evolution of RAN from 3G to 5G NR and proposes a novel RAN architecture for 6G named Unified Access and Control RAN (UACRAN). UACRAN facilitates efficient integration of communication, sensing capabilities, computing, and big data technologies in a cost-efficient manner with reduced complexity. Following an analysis of usage scenarios and requirements of IMT-2030 and beyond, the paper outlines the design principles of 6G RAN, the UACRAN architecture and its underlying concept and its key enabling technologies. UACRAN offers significant advantages: low complexity, lean design, compatible and low-cost. Finally, the paper identifies research areas for academia and industry to explore further.