Siemens Aktiengesellschaft

Gerhard Wilms

Peter Luehrs

A method for controlling railway signal installations of a railway system by exchanging data between directly adjacent transceivers over electrically conducting rails of a track is disclosed. More particularly, the method allows bidirectional data exchange between the transceivers without employing track sections with insulating joints. Data are exchanged during alternating transmit and receive cycles which each have three separate time intervals. Signal pulses are received at the transceivers either depending on their polarity during the transmit and receive cycles, or the signal pulses are prepended with an identification pulse. In this way, only one transceiver is enabled to transmit and only one receiver is enabled to receive the transmitted signal pulses in a given time interval.

Method for transmitting data for controlling railway signal installations of a railway system

A railway system and a method for forwarding data in a railway system are described. Railway signaling devices are arranged near the rails. Other devices associated with the railway signaling devices each have a unique identifier, with two adjacent devices exchanging signals with one another via the rails. To transmit information in addition to the data for safely controlling the railway signaling devices without reducing the transmission capacity for the data for the safe control, a portion of the data can include the identifier of the origination device, the information and the identifier of the target device. When these data are forwarded, a first device transmits the data to the immediately following second device in the direction of the target device. The second device receives and stores the data, and returns the data to the first device, which then compares the returned data with the initially transmitted data and acknowledges to the second device the identity between the data.

Railway system and a method for forwarding data in a railway system

A railway system with at least one track having at least two rails and a method for encoding data for this railway system are disclosed. Railway signaling systems are located proximate to the tract for controlling railway cars moving along the rails. The railway system also includes safety systems associated with the railway signaling systems for exchanging data between the safety systems for safely controlling the railway signaling systems. The data are exchanged bidirectionally by signal pulses, whereby digital electrical signals are transmitted via the two electrically conducting rails. For encoding the data, each data point is formed from one or more signal pulses within a predetermined cycle time which is divided into time intervals. The encoding capacity can be enhanced, without significantly increasing the complexity, by using electrical signals that contain the encoded data in each time interval in form of at least one of three different signal states.

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Braunschweig, Germany

Gerhard Wilms