System and apparatus for determining the position of railbound vehicles on a railway system

A method for controlling rail-bound vehicles in a railway system, the method comprising:

• measuring a radio signal in the phase domain of wireless communication occurring between each vehicle and base stations arranged at predetermined positions in the vicinity of railways of said railway system;
• determining present positions of the rail-bound vehicles on at least one railway of the railway system based on said measurements;
• and
• issuing control signals to control the operation of said vehicles based on said determined present positions;
• wherein the radio signal measurements in the phase domain comprises measuring of a phase difference of radio signals of different frequencies transferred between the vehicles and the base station.

An apparatus for determining a position of a rail-bound vehicle on a railway, the apparatus comprising:

• a transmitter and receiver for wireless communication with at least one base station arranged at a predetermined position in the vicinity of the railway;
• a measurement device to determine a distance to said at least one base station based on measurements of radio signals of said wireless communication in the phase domain;
• and
• a controller arranged to determine a present position of said vehicle on said railway based on said distance;
• wherein the radio signal measurements in the phase domain comprises measuring of a phase difference of radio signals of different frequencies transferred between the vehicles and the base stations.

A method for determining a position of a rail-bound vehicle on a railway, the method comprising:

• providing wireless communication with at least one base station arranged at a predetermined position in the vicinity of the railway;
• measuring a distance to said at least one base station based on measurements of radio signals of said wireless communication in the phase domain;
• and
• determining a present position of said vehicle on said railway based on said distance,
• wherein the radio signal measurements in the phase domain comprises measuring of a phase difference of radio signals of different frequencies transferred between the vehicles and the base stations.