System for collision warning by mobile stations sending location information to a central station which then sends out alert signals when required

摘要

Disclosed is a method for using mobile communication systems for the control of the movement of mobile objects. The system comprises a control station which receives from mobile stations location information relating to a current location of the stations, the mobile stations being carried by the mobile objects. The control station detects from the location information received that one of the mobile stations is approaching the current location of another of the mobile stations and issues an alert signal to either or both of the mobile stations to indicate an alert condition related to the detected approach. The processor of the central control may calculate a probability that a collision will occur and issues a warning then the probability reaches a preset threshold and a second more urgent warning when a second higher threshold is past. The warning may be issued based on the distance between the mobile stations. The mobile station may send a time index and speed data to the control station. The mobile objects may be land vehicles eg trains, waterborne eg ships or airborne.