Facility for fail-safe data transmission between trackside equipment of a guideway and vehicles moving therealong
AssigneeInternational Standard Electric Corporation
InventorDieter Spitza
Life of this patent
Estimating the term…
Abstract
A facility for fail-safe data transmission between trackside equipment of a guideway and vehicles moving therealong is disclosed which transmits two identical data records held in two independent storage arrangements in the trackside equipment to a data receiver in the vehicle according to fail-safe principles. Error protection of the data is provided by means of a cyclic code. To enable monitoring the transmitting equipment for component failures from the receiving equipment, a special bit group is transmitted whose bits are checked for equivalence in the receiving equipment.
Claims5
A facility for fail-safe data transmission between trackside equipment of a guideway and vehicles moving along said guideway comprising:
- data transmitting equipment in said trackside equipment to transmit data to said vehicle in the form of serial bit data messages protected against errors by means of a cyclic code using a redundancy technique, said transmitting equipment including
- two independent storage arrangements each having identical data stored therein;
- a message transmitter to transmit data to said vehicle;
- a first parallel-serial converter coupling one of said two storage arrangements to said message transmitter;
- a second parallel-serial converter coupled to the other of said two storage arrangements;
- a feedback shift register coupled between said second parallel-serial converter and said message transmitter;
- and
- means coupled to said first converter and said shift register to time the delivery of data to said message transmitter from said first converter and said shift register to provide a data message for transmission to said vehicle having an information portion provided by said first converter and a redundant portion provided by said shift register.
Dependencies are inferred from the claim text.