1. Vision, requirements, and technology trend of 6G: How to tackle the challenges of system coverage, capacity, user data-rate and movement speed;Chen;IEEE Wirel. Commun.,2020
2. Sixth generation (6G) wireless networks: Vision, research activities, challenges and potential solutions. Symmetry;Alsharif;Symmetry,2020
3. 6G wireless systems: A vision, architectural elements, and future directions;Khan;IEEE Access,2020
4. A vision and framework for the high altitude platform station (HAPS) networks of the future;Karabulut Kurt;IEEE Commun. Surv. Tutor.,2021
5. Reconfigurable intelligent surfaces: Potentials, applications, and challenges for 6G wireless networks;Basharat;IEEE Wirel. Commun.,2021