Broadband Access in Complex Environments: LTE on Railway

César BRISO-RODRÍGUEZ  Carlos F. LÓPEZ  Jean R.O. FERNÁNDEZ  Sergio PÉREZ  Drasko DRASKOVIC  Jaime CALLE-SÁNCHEZ  Mariano MOLINA-GARCIA  José I. ALONSO  Carlos RODRÍGUEZ  Carlos HERNÁNDEZ  Juan MORENO  José RODRÍGUEZ-PIÑEIRO  José A. GARCÍA-NAYA  Luis CASTEDO  Alfonso FERNANDEZ-DURÁN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E97-B   No.8   pp.1514-1527
Publication Date: 2014/08/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.1514
Type of Manuscript: INVITED PAPER (Special Section on EU's FP7 ICT R&D Project Activities on Future Broadband Access Technologies in Conjunction with Main Topics of 2013 IEICE ICT Forum)
Category: 
Keyword: 
LTE,  railway,  propagation,  broadband,  channel modeling,  

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Summary: 
This paper assesses the main challenges associated with the propagation and channel modeling of broadband radio systems in a complex environment of high speed and metropolitan railways. These challenges comprise practical simulation, modeling interferences, radio planning, test trials and performance evaluation in different railway scenarios using Long Term Evolution (LTE) as test case. This approach requires several steps; the first is the use of a radio propagation simulator based on ray-tracing techniques to accurately predict propagation. Besides the radio propagation simulator, a complete test bed has been constructed to assess LTE performance, channel propagation conditions and interference with other systems in real-world environments by means of standard-compliant LTE transmissions. Such measurement results allowed us to evaluate the propagation and performance of broadband signals and to test the suitability of LTE radio technology for complex railway scenarios.