Siemens Mobility Gmbh

Bhabani Nayak

Karsten Rahn

Daniel Fortunati

Ernesto De Stefano

A computer-assisted method for monitoring a first time base of a first communication device and a second time base of a second communication device. First, Cristian's algorithm is used to calculate time offset intervals between the time bases. Second, the maximally possible drift of the time offset is ascertained multiple times for two measurement steps. A minimally possible drift is ascertained from the upper limit of the time offset interval for the previous measurement step and the lower limit of the time offset interval for the subsequent measurement step. The upper and lower limits of a drift interval are calculated from the maximally and minimally possible drifts. Third, the lowest upper limit is defined as the upper limit of a resulting drift interval, and the highest lower limit is defined as the lower limit of the resulting drift interval with narrow limits for the relative drift.

Device and method for monitoring two time bases of two communication devices with the aid of a computer

A method for the detection of a crosstalk phenomenon in the communication between a wayside transmission unit, especially a balise, and an on-board unit including an antenna unit, of a railway vehicle, includes the steps of receiving an excitation signal of the wayside transmission unit by using the antenna unit in a moving state of the railway vehicle and measuring an electric and/or a magnetic field in a near field of the wayside transmission unit by using the antenna unit upon reception of the excitation signal. A near field to far field transformation on the field measured in the measuring step is performed to detect a presence of a crosstalk phenomenon. A corresponding an on-board unit is also provided.

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Braunschweig, Germany

Bhabani Nayak