The article "Structured Satellite-UAV-Terrestrial Networks for 6G Internet of Things" by Wei Feng, Yanmin Wang, Yunfei Chen, Ning Ge, and Cheng-Xiang Wang explores the integration of satellites, unmanned aerial vehicles (UAVs), and terrestrial networks to support the 6G Internet of Things (IoT). The authors address the limitations of current 5G networks, particularly in remote and maritime areas, and propose a hybrid satellite-UAV-terrestrial network to provide ubiquitous coverage. They highlight the challenges of system complexity due to the heterogeneity and dynamics of space/air/ground links and introduce a structured approach inspired by human body synergies. Four basic structures—arm-hand, broadcast-communication, hand-foot, and eye-foot—are proposed to manage the network's complexity. Additionally, a process-oriented on-demand coverage optimization method is introduced, which characterizes system behavior as a series of events over time, addressing the complexity at a mesoscopic scale. The article also outlines open issues, such as the need for new performance metrics, a knowledge-driven network framework, and data exchange security, to further advance the integration of satellite-UAV-terrestrial networks in 6G.The article "Structured Satellite-UAV-Terrestrial Networks for 6G Internet of Things" by Wei Feng, Yanmin Wang, Yunfei Chen, Ning Ge, and Cheng-Xiang Wang explores the integration of satellites, unmanned aerial vehicles (UAVs), and terrestrial networks to support the 6G Internet of Things (IoT). The authors address the limitations of current 5G networks, particularly in remote and maritime areas, and propose a hybrid satellite-UAV-terrestrial network to provide ubiquitous coverage. They highlight the challenges of system complexity due to the heterogeneity and dynamics of space/air/ground links and introduce a structured approach inspired by human body synergies. Four basic structures—arm-hand, broadcast-communication, hand-foot, and eye-foot—are proposed to manage the network's complexity. Additionally, a process-oriented on-demand coverage optimization method is introduced, which characterizes system behavior as a series of events over time, addressing the complexity at a mesoscopic scale. The article also outlines open issues, such as the need for new performance metrics, a knowledge-driven network framework, and data exchange security, to further advance the integration of satellite-UAV-terrestrial networks in 6G.