engleski

Some Signal Propagation and Traffic Handover Aspects of a Mobile Radio Network for High-Speed Railways

Taking advantage of GSM’ s elaborated mobility management and its international roaming capability, the International Union of European Railroad Operators (UIC) has decided to build a supra-national rail radio network based on enhanced GSM technology. In this paper, some implementation aspects specific to rail-road radio environment resulting from the effects of vehicle speed - in particular Doppler shift - are discussed, and an “ off-line” algorithm for the traffic handover is proposed, which offers better radio link reliability and less critical timing constraints than conventional handover schemes. More reliable handover is of vital significance in the case of high-speed trains since the radio link is supposed to carry the automatic control signals (ATC), too.

GSM; rail radio network; traffic handover; high speed trains

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