Advancing Towards 6G: Challenges, Key Technologies, and Applications of the Internet-of-Intelligent-Things

This paper investigates the critical role of the Internet-of-Intelligent-Things (IoIT) in propelling the evolution toward 6G wireless communication technologies. The ensuing 6G era, characterized by augmented bandwidth, transmission rates, and connection volume, sets the stage for a synergistic interplay between 6G and IoIT. This synergy is envisioned to introduce novel capabilities including energy-efficient computing, endogenous safety and security, ubiquitous intelligence, along with differentiated and refined services. However, the current maturity of Artificial Intelligence (AI) and Machine Learning (ML) technologies is yet to meet the practical application demands of the 6G-IoIT paradigm comprehensively. This paper delves into the principal enablers and challenges, shedding light on promising research avenues crucial for the advancement of the 6G-IoIT. Moreover, we propose four prospective use cases: mobile Extended Reality (XR), human digital twins, smart space, and Vehicle-to-Everything (V2X) communications, which underscore the multi-faceted benefits and real-world applicability of the 6G-IoIT framework.