Method for transmitting data for controlling railway signal...

Details Method for transmitting data for controlling railway signal... Method for transmitting data for controlling railway signal...

2006-11-08

2009-11-24

Lugo, David B (Department: 2611)

Pulse or digital communications

Transceivers

C375S259000, C246S03400A, C246S0340CT

Reexamination Certificate

active

07623567

ABSTRACT:
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.

REFERENCES:
patent: 2515868 (1950-07-01), Gilson
patent: 3794832 (1974-02-01), Huffman et al.
patent: 3868075 (1975-02-01), Blazek et al.
patent: 5271584 (1993-12-01), Hochman et al.

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