University of Oulu

H. Saarnisaari and C. M. de Lima, "5G New Radio in SATCOM: An Overview of Physical and Medium Access Layer Issues," 2020 22nd International Conference on Transparent Optical Networks (ICTON), Bari, Italy, 2020, pp. 1-4, doi: 10.1109/ICTON51198.2020.9203099

5G new radio in SATCOM : an overview of physical and medium access layer issues

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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, 0.1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2020-11-12


The 3GPP standardization body is actively investigating the requirements and specifying the radio access interface of 5G new radio (NR) systems to support satellite communications. However, the 5G NR was originally designed as a terrestrial system, therefore, there are a few open questions and technological challenges that need to be assessed so as to properly support such non-terrestrial communication systems. In that regard, several related problems and potential solutions have been proposed and evaluated not only within 3GPP working groups, but also by the scientific community including academia and industry. In this contribution, we first overview the recent developments in the random access and physical layer procedures to support satellite communication in 5G networks, identify their limitations and then propose viable solutions. Note that such solutions do not necessarily require to change the standard, but eventually to reparametrize the 5G NR signal based on vendors knowledge of specific deployment scenarios. For instance, we observed that the proper use of reference symbols is required to cope with nonlinear effects due to satellite amplifiers. Our results also show that high reference symbol density is required, while still just fairly low modulation orders can be used.

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ISBN: 978-1-7281-8423-4
ISBN Print: 978-1-7281-8424-1
Pages: 1 - 4
Article number: 9203099
DOI: 10.1109/ICTON51198.2020.9203099
Host publication: 22nd International Conference on Transparent Optical Networks, ICTON 2020
Conference: International Conference on Transparent Optical Networks
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: The work has been financially supported by EU Horizon 2020 project SaT5G under grant agreement No 761413, and 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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