NAVIGATION METHOD, NAVIGATION SYSTEM, NAVIGATION DEVICE, VEHICLE PROVIDED THEREWITH AND GROUP OF VEHICLES

摘要

A navigation system is described comprising at least a first and a second navigation device (201A, 201B) that each is capable of determining an initial estimation (p 1A , p 1B ) of their own position,
- the first navigation device (201A) having a facility (225A) for transmitting its relevant navigation information (p 1A ) to the second navigation device (201B),
- the second navigation device (201B) having a facility (225B) for receiving the relevant navigation information (p 1A ),
- at least one of the first and second navigation device (201A, 201B) having a facility (210A, 210B) for providing a proximity signal (Spr, S'pr) that indicates whether the first and second navigation device are within proximity of each other,
- the second navigation device having a dead reckoning facility (210B) for calculating the initial estimation (p 1B ) of its position and a facility (250B) for improving an accuracy of estimating its own position using relevant navigation information (p 1A ) provided by the first navigation device (201 A) for positions for which the proximity signal (Spr) was given.