What is the difference between Earth-fixed, quasi-Earth-fixed, and Earth-moving service links in the context of non-terrestrial networks?
Earth-fixed service links cover the same geographical areas all the time, while quasi-Earth-fixed service links cover one area for a limited period of time and Earth-moving service links cover areas that slide over the Earth surface.
Earth-fixed service links only cover the Earth surface, while quasi-Earth-fixed service links also cover the atmosphere and Earth-moving service links cover outer space.
Earth-fixed service links use geostationary satellites, while quasi-Earth-fixed service links use satellites in low-Earth orbit, and Earth-moving service links use satellites in medium-Earth orbit.
Earth-fixed service links are used for terrestrial networks, quasi-Earth-fixed service links are used for non-terrestrial networks, and Earth-moving service links are used for satellite backhauling.
Earth-fixed service links are used for voice communication, quasi-Earth-fixed service links are used for video monitoring, and Earth-moving service links are used for remote control.