Spectrum Sharing in Satellite-Terrestrial Integrated Networks: Frameworks, Approaches, and Opportunities
Bodong Shang, Zheng Wang, Xiangyu Li, Chungang Yang, Chao Ren, Haijun Zhang

TL;DR
This paper reviews spectrum sharing frameworks and approaches in satellite-terrestrial integrated networks, highlighting challenges, potential solutions, and future research directions to enhance spectrum efficiency and network capacity.
Contribution
It introduces four spectrum sharing frameworks, discusses technical challenges, and evaluates performance, providing a comprehensive overview of spectrum sharing in satellite-terrestrial networks.
Findings
Preliminary evaluation shows spectrum sharing improves network capacity.
Interference management is critical for effective spectrum sharing.
Four spectrum sharing frameworks are proposed for different scenarios.
Abstract
With the construction of low-earth orbit (LEO) satellite constellations, ubiquitous connectivity has been achieved. Terrestrial networks (TNs), such as cellular networks, are mainly deployed in specific urban areas and use licensed spectrum. However, in remote areas where terrestrial infrastructure is sparse, licensed spectrum bands are often underutilized. To accommodate the increasing communication needs, non-terrestrial networks (NTNs) can opportunistically access this idle spectrum to improve spectrum efficiency via spectrum sharing (SS). Therefore, bringing NTNs to a shared spectrum with TNs can improve network capacity under reasonable interference management. In satellite-terrestrial integrated networks (STINs), the comprehensive coverage of a satellite and the unbalanced communication resources of STINs make it challenging to manage mutual interference between NTN and TN…
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Taxonomy
TopicsSatellite Communication Systems · Spacecraft Design and Technology
