Helka-Liina Määttänen, Jonas Sedin, Sergio Parolari, Robert S. Karlsson
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引用次数: 1
Abstract
In Release 17, 3GPP introduced adaptations and enhancements to the 5G new radio (NR) specification to support non-terrestrial networks (NTNs) operation. The main challenges were due to long propagation delays, especially in GEO deployments, and the movement of the satellites in LEO deployments. In this paper, we give an overview of the protocol adaptations to support NTNs. The main user plane protocol adaptations include changes to random access and hybrid automatic repeat request to due long propagation delays. The control plane protocol adaptations include a variety of mobility related enhancements for user equipment.
期刊介绍：
The journal covers all aspects of the theory, practice and operation of satellite systems and networks. Papers must address some aspect of satellite systems or their applications. Topics covered include:
-Satellite communication and broadcast systems-
Satellite navigation and positioning systems-
Satellite networks and networking-
Hybrid systems-
Equipment-earth stations/terminals, payloads, launchers and components-
Description of new systems, operations and trials-
Planning and operations-
Performance analysis-
Interoperability-
Propagation and interference-
Enabling technologies-coding/modulation/signal processing, etc.-
Mobile/Broadcast/Navigation/fixed services-
Service provision, marketing, economics and business aspects-
Standards and regulation-
Network protocols
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