Abstract :
[en] Integrating terrestrial and non-terrestrial networks
has the potential of connecting the unconnected and enhancing
the user experience for the already-connected, with technological
and societal implications of the greatest long-term significance. A
convergence of ground, air, and space wireless communications
also represents a formidable endeavor for the mobile and satellite
communications industries alike, as it entails defining and intelligently
orchestrating a new 3D wireless network architecture.
In this article, we present the key opportunities and challenges
arising from this revolution by presenting some of its disruptive
use cases and key building blocks, reviewing the relevant standardization
activities, and pointing to open research problems. By
considering two multi-operator paradigms, we also showcase how
terrestrial networks could be efficiently re-engineered to cater
for aerial services, or opportunistically complemented by nonterrestrial
infrastructure to augment their current capabilities
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