Conflicts of Interest The authors declare no conflicts of interest. References 1, , , and , “What Should 6G Be?,” Nature Electronics 3, no. 1 (2020): 20–29. 2, , , and , “6G Wireless Communications: Vision and Potential Techniques,” IEEE Network 33, no. 4 (2019): 70–75. 3, , , , , and , “Hybrid Satellite-Terrestrial Communication Networks for the Maritime Internet of Things: Key Technologies, Opportunities, and Challenges,” IEEE Internet of Things Journal 8, no. 11 (2021): 8910–8934.
