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Cognitive radio network architecture for GEO and LEO satellites shared downlink spectrum
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Authors: Sam Reisenfeld, Bo Li, Ediz Cetin
Status: Final
Date of publication: 3 June 2024
Published in: ITU Journal on Future and Evolving Technologies, Volume 5 (2024), Issue 2, Pages 212-220
Article DOI : https://doi.org/10.52953/EWHG8960
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Abstract:
The fixed spectrum assignment policy in the space sector and large constellations of Low Earth Orbit (LEO) satellites left little or no spectrum available for future LEO satellite communications services. Cognitive Radio (CR) technology enables spectrum sharing between primary and secondary users without limiting the transmission power, and thus is of great interest to commercial and defense entities. A number of Radio Environment Map (REM) techniques have been making Cognitive Radio Networks (CRNs) practical by constructing a comprehensive map of the CRN by utilizing multi-domain information from geolocation databases, characteristics of spectrum use, geographical terrain models, propagation environment, and regulations. In this paper, we investigate spectrum sharing for a network comprised of a Geostationary Orbit (GEO) and a LEO satellite with a multibeam antenna array. A CRN architecture of GEO and LEO satellites shared downlink spectrum is proposed and details are provided covering its architecture, REM structure and channel utilization data aggregation, as well as a frequency slot assignment mechanism. |
Keywords: Channel monitoring, cognitive radio networks, geostationary orbit satellites, low Earth orbit satellites, radio environment map, spectral sensing
Rights: © International Telecommunication Union, available under the CC BY-NC-ND 3.0 IGO license.
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