University of Oulu

H. Saarnisaari and C. M. de Lima, "5G NR over Satellite Links: Evaluation of Synchronization and Random Access Processes," 2019 21st International Conference on Transparent Optical Networks (ICTON), Angers, France, 2019, pp. 1-4. doi: 10.1109/ICTON.2019.8840369

5G NR over satellite links : evaluation of synchronization and random access processes

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Author: Saarnisaari, Harri1; de Lima, Carlos Morais1
Organizations: 1University of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2019
Publish Date: 2019-10-16


Integration of 5G new radio (NR) access interface with satellite technology is an ongoing task in the standardization bodies. Since 5G NR was originally designed as a terrestrial system, its direct suitability to satellite communications has yet to be carefully evaluated. In that regard, the initial synchronization and random access processes are among the topics of particular interest. This paper overviews these key processes by first identifying problematic points and then proposing feasible solutions. It is shown that initial synchronization and related data demodulation of the 5G NR synchronization block is possible using dedicated large frequency shift aware receivers. In addition, it is shown that timing advance value, which is a part of the random access process, has to be extended to cover satellite delays. A few ways to do this are discussed in the paper, as well as ways to reduce capacity loss due to required large guard interval of the 5G NR random access signal.

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Series: Conference proceedings : International Conference on Transparent Optical Networks
ISSN: 2161-2056
ISSN-E: 2161-2064
ISSN-L: 2161-2056
ISBN: 978-1-7281-2779-8
ISBN Print: 978-1-7281-2780-4
Pages: 1 - 4
DOI: 10.1109/ICTON.2019.8840369
Host publication: 2019 21st International Conference on Transparent Optical Networks (ICTON). 9-13 July 2019, Angers, France
Conference: International Conference on Transparent Optical Networks
Type of Publication: B3 Article in conference pro-ceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This paper is based on results obtained in the Horizon 2020 SaT5G project under grant agreement No 761413 that aims to study integration of satellite and 5G terrestrial systems in a wide sense, from many angles. This research has also been supported by Academy of Finland 6Genesis Flagship (grant 318927).
EU Grant Number: (761413) SaT5G - Satellite and Terrestrial Network for 5G
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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