Satellite-enabled LTE systems in LEO Constellations
Autor: | Daniele Tarchi, Stefano Cioni, Joan Bas, Giulio Colavolpe, Alessandro Vanelli-Coralli, Marius Caus, Alessandro Guidotti, Andrea Modenini, Tommaso Foggi |
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Přispěvatelé: | Guidotti, A., Vanelli-Coralli, A., Caus, M., Bas, J., Colavolpe, G., Foggi, T., Cioni, S., Modenini, A., Tarchi, D. |
Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
LTE
satellite-terrestrial networks PHY procedures MAC procedures HARQ Random Access business.industry Computer science Node (networking) ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Hybrid automatic repeat request 020206 networking & telecommunications 020302 automobile design & engineering 02 engineering and technology Data_CODINGANDINFORMATIONTHEORY law.invention 0203 mechanical engineering Handover Relay law PHY Telecommunications link Broadband 0202 electrical engineering electronic engineering information engineering Satellite business Telecommunications Random access Computer network Constellation |
Zdroj: | Alma Mater Studiorum Università di Bologna-IRIS ICC Workshops |
Popis: | LTE-based satellite systems in LEO constellations are a promising solution for extending broadband coverage to areas not connected to a terrestrial infrastructure. However, the large delays and Doppler shifts over the satellite channel pose severe technical challenges to a traditional LTE system. In this paper, two architectures are proposed for a LEO mega-constellation realizing a satellite-enabled LTE system, in which the on-ground LTE entity is either an eNB (Sat-eNB) or a Relay Node (Sat-RN). Focusing on the latter, the impact of large delays and Doppler shifts on LTE PHY/MAC procedures is discussed and assessed. It will be shown that, while carrier spacings, Random Access, and RN attach procedures do not pose specific issues, HARQ requires substantial modifications. Moreover, advanced handover procedures will be also required due to the satellites' movement. |
Databáze: | OpenAIRE |
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