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Architectures and Key Technical Challenges for 5G Systems Incorporating Satellites

Guidotti, Alessandro, Vanelli-Coralli, Alessandro, Conti, Matteo, Andrenacci, Stefano, Chatzinotas, Symeon, Maturo, Nicola, Evans, Barry, Awoseyila, Adegbenga, Ugolini, Alessandro, Foggi, Tommaso , Gaudio, Lorenzo, Alagha, Nader and Cioni, Stefano (2019) Architectures and Key Technical Challenges for 5G Systems Incorporating Satellites IEEE Transactions on Vehicular Technology, 68 (3). pp. 2624-2639.

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Satellite communication systems are a promising solution to extend and complement terrestrial networks in unserved or under-served areas, as reflected by recent commercial and standardization endeavors. In particular, 3GPP recently initiated a study item for new radio, i.e., 5G, non-terrestrial networks aimed at deploying satellite systems either as a stand-alone solution or as an integration to terrestrial networks in mobile broadband and machine-type communication scenarios. However, typical satellite channel impairments, as large path losses, delays, and Doppler shifts, pose severe challenges to the realization of a satellite-based NR network. In this paper, based on the architecture options currently being discussed in the standardization fora, we discuss and assess the impact of the satellite channel characteristics on the physical and medium access control layers, both in terms of transmitted waveforms and procedures for enhanced mobile broadband and narrowband-Internet of Things applications. The proposed analysis shows that the main technical challenges are related to the PHY/MAC procedures, in particular random access, timing advance, and hybrid automatic repeat request and depending on the considered service and architecture, different solutions are proposed.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Guidotti, Alessandro
Vanelli-Coralli, Alessandro
Conti, Matteo
Andrenacci, Stefano
Chatzinotas, Symeon
Maturo, Nicola
Ugolini, Alessandro
Foggi, Tommaso
Gaudio, Lorenzo
Alagha, Nader
Cioni, Stefano
Date : March 2019
Funders : European Space Agency
DOI : 10.1109/TVT.2019.2895263
Grant Title : 5G Access Solutions Assessment for Satellite Scenarios
Copyright Disclaimer : © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Satellite Communications; New radio; Satellite-terrestrial networks; 5G; PHY/MAC procedures; Satellite broadcasting; 5G mobile communication; Communication channels; 3GPP; Computer architecture; Delays; Broadband communication
Depositing User : Clive Harris
Date Deposited : 21 Mar 2019 14:41
Last Modified : 21 Mar 2019 14:41

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