@article{9a245cdeb900402ea63569bf3f107de0,
title = "Licensed shared access field trial and a testbed for satellite-terrestrial communication including research directions for 5G and beyond",
abstract = "This paper describes a licensed shared access (LSA) testbed and field trials using a live network. The testbed includes real 4G base stations and up-to 1000 virtual base stations, in the spectrum sharing scenario between satellite and cellular systems. The trials focus on 5G pioneer bands 3.4–3.8 GHz and 24.25-27.5 GHz where a satellite system is operating in the downlink direction and a cellular system is accessing the same band. The designed testbed supports both frequency bands. The performance evaluation concerns evacuation and frequency change times using different types of base stations in 3.6 GHz, i.e., how fast the system relinquishes the shared band to the primary user and continues transmission using another band. We show that our LSA system is scalable and able to support large number of base stations. In addition, we investigate how satellite systems could reuse International Mobile Telecommunication (IMT) bands to offer enhanced satellite communication services for land, maritime and aeronautical applications. Preliminary simulations and analysis confirm the possibility to reuse IMT spectrum for satellite systems without causing harmful interference to the terrestrial system.",
keywords = "Spectrum sharing, Cognitive radio, satellite communications, hybrid communications",
author = "Marko H{\"o}yhty{\"a} and Mikko Majanen and Mika Hoppari and Pertti J{\"a}rvensivu and Heikki Kokkinen and Jaakko Ojaniemi and Arto Reis-Kivinen and Olivier Pellay and {Pham Minh}, Duc and Maria Guta",
note = "Funding Information: The work has been funded by the European Space Agency ARTES Project ?ASCENT: Demonstrator for license assisted spectrum access satellite networks, contract no. 4000123000/18/NL/WE.? The authors would like to acknowledge fruitful discussions with the advisory board members of the project, that is, Eutelsat, Intelsat, Avanti, Inmarsat, and Nokia. The views expressed in the paper are those of the authors and do not reflect the official opinion of the European Space Agency or the advisory board. Funding Information: The work has been funded by the European Space Agency ARTES Project “ASCENT: Demonstrator for license assisted spectrum access satellite networks, contract no. 4000123000/18/NL/WE.” The authors would like to acknowledge fruitful discussions with the advisory board members of the project, that is, Eutelsat, Intelsat, Avanti, Inmarsat, and Nokia. The views expressed in the paper are those of the authors and do not reflect the official opinion of the European Space Agency or the advisory board. Publisher Copyright: {\textcopyright} 2020 The Authors. International Journal of Satellite Communications and Networking published by John Wiley & Sons Ltd",
year = "2021",
month = jul,
day = "1",
doi = "10.1002/sat.1380",
language = "English",
volume = "39",
pages = "455--472",
journal = "International Journal of Satellite Communications and Networking",
issn = "1542-0973",
publisher = "Wiley",
number = "4",
}