naa a22 4500 510795129 CHVBK 20180411083333.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s11277-012-0656-9 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0656-9 On the Performance of TETRA DMO Short Data Service in Railway VANETs [Elektronische Daten] [Andreas Lehner, Cristina Rico García, Thomas Strang] In this paper we present the results of an empirical study investigating the performance of TETRA (TErrestrial Trunked RAdio) in a Vehicular Ad-hoc Network (VANET) for safety related railway traffic applications. The Short Data Service (SDS) of TETRA in the Direct Mode Operation (DMO) allows an infrastructure-less exchange of traffic relevant information between vehicles in range of the communication. The propagation channel in case of such a direct (base station free) communication between railway vehicles underlies specific effects, which are not equivalent to other well known terrestrial mobile scenarios. We will present measurements covering urban, suburban and rural environments along a regional railway network in the south of Bavaria. Beside different operational conditions such as front, rear, and flank approaches of trains, we investigated several topological scenarios on both, single and double track sections along the line. We will also discuss the observed characteristic changes in narrow band signal attenuation and Doppler spectra for passages through forests, hilly areas, stations and a tunnel. We determined statistics for the transmission delay of messages and the message erasure rates for single and multi user access on a single common carrier for different transmission intervals. Finally, the quality of service for the envisaged safety applications is assessed. Springer Science+Business Media, LLC., 2012 TETRA nationallicence DMO nationallicence Short data service nationallicence VANET nationallicence Propagation nationallicence Channel nationallicence Measurement nationallicence UHF nationallicence Train-to-train nationallicence Railway nationallicence Path loss nationallicence Model nationallicence V2V nationallicence MAC nationallicence RCAS nationallicence Lehner Andreas German Aerospace Center DLR, Institute for Communications and Navigation, Muenchner Str. 20, 82234, Wessling, Germany aut Rico García Cristina German Aerospace Center DLR, Institute for Communications and Navigation, Muenchner Str. 20, 82234, Wessling, Germany aut Strang Thomas German Aerospace Center DLR, Institute for Communications and Navigation, Muenchner Str. 20, 82234, Wessling, Germany aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/4(2013-04-01), 1647-1669 0929-6212 69:4<1647 2013 69 11277 https://doi.org/10.1007/s11277-012-0656-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0656-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lehner Andreas German Aerospace Center DLR, Institute for Communications and Navigation, Muenchner Str. 20, 82234, Wessling, Germany aut NATIONALLICENCE 700 1- Rico García Cristina German Aerospace Center DLR, Institute for Communications and Navigation, Muenchner Str. 20, 82234, Wessling, Germany aut NATIONALLICENCE 700 1- Strang Thomas German Aerospace Center DLR, Institute for Communications and Navigation, Muenchner Str. 20, 82234, Wessling, Germany aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/4(2013-04-01), 1647-1669 0929-6212 69:4<1647 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer