Beyond 5G: Its challenges and strategy for realization

Abstract

Beyond 5G (B5G) represents next-generation communication technology building upon 5G, aiming to address various societal challenges such as enhanced data rates, reduced latency, massive connectivity, extended coverage, improved autonomy, energy efficiency, sustainability, security, digital inclusion, and industrial competitiveness. B5G serves as the foundation for cyber-physical systems and is expected to function as a critical "lifeline" supporting daily life and industries. Achieving B5G requires key technologies including all-optical networks for low latency and power efficiency, non-terrestrial networks for wide coverage, OpenRAN for flexibility, AI-driven communication-sensing integration, advanced spectrum utilization, local 5G/6G, and software-based systems. Building the B5G infrastructure demands interdisciplinary research, enhanced infrastructure support, and strategic talent development. Collaboration across fields such as telecommunications, AI, semiconductors, and IoT, along with testbeds for technology validation and researcher training, is essential. Strengthening international cooperation and domestic inter-agency collaboration will ensure talent supply, social implementation of research, and contributions to global standardization efforts.