Abstract
Taking advantage of GSM's elaborated mobility managementand its intemational roaming capability, the IntemationalUnion of European Railroad Operators (UJC) has decidedto build a supra-national rail radio network based on enhancedGSM technology.In this pape1; some implemmtation aspects specific to railroadradio environment resulting from the effects of vehiclespeed - in particular Doppler shift - are discussed, and an'off-line' algorithm for the traffic handover is proposed, whichoffers bel/er radio link reliability and less critical timing constraintsthan conventional handover schemes. More reliablehandover is of vital significance in the case of high-speed trainssince the radio link is supposed to cany the automatic controlsignals (ATC), too.References
ORE A 133-RP3, 'Funkausbreitung auf Eisenbahnstrecken',
ORE, Utrecht 1978
ERRI A 175/RP2, 'Railway Radio Propagation, Including
Aspects of Transmission of Safety Information ',
ERRi, Utrecht 1992
Goeller M, 'Radio Channel Measurements on Lines of
the German Federal Railways in the 900 MHz-Band',
COST 231, TD(92)20, Wien 1992.
Frohlingsdorf G., Goeller M., Masur K.D., Web U.,
'Messergebnisse und Parameter zur Modellierung von
Bahn - Mobilfunkkanalen im 900 MHz-Band', Nachrichtentechnik,
Elektronik 43 (1993), no. 6, pp.290
Goeller M., Masur K.D., 'Ergebnisse von Funkkanalmessungen
in 900 MHz-Bereich auf Neubaustrecken der
Deutschen Bundesbahn' Teil 1 und 2 Nachrichtentechnik,
Elektronik 42 (1992) 4, pp. 143
Remy J.G. et al., 'Systemes de Radiocommunication
avec les Mobiles', Eyrolles, Paris 1988
Parsons D., 'The Mobile Radio Propagation Channel',
Halsted Press, New York 1992